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llvm / llvm-project / 33f8c1168f39c49091d644146ef49d9567cfa984 / . / llvm / test / Analysis / ScalarEvolution / flags-from-poison.ll
blob: bd8e37bf3fdf2476cc3806c5ce1d67620355a3ca [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
; RUN: opt < %s -S -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
; Positive and negative tests for inferring flags like nsw from
; reasoning about how a poison value from overflow would trigger
; undefined behavior.
define void @foo() {
; CHECK-LABEL: 'foo'
; CHECK-NEXT: Classifying expressions for: @foo
; CHECK-NEXT: Determining loop execution counts for: @foo
;
ret void
}
; Example where an add should get the nsw flag, so that a sext can be
; distributed over the add.
define void @test-add-nsw(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-nsw'
; CHECK-NEXT: Classifying expressions for: @test-add-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {(sext i32 %offset to i64),+,1}<nsw><%loop> U: [-2147483648,6442450943) S: [-2147483648,6442450943) Exits: ((zext i32 (-1 + %numIterations) to i64) + (sext i32 %offset to i64)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
call void @foo()
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where an add should get the nuw flag.
define void @test-add-nuw(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-nuw'
; CHECK-NEXT: Classifying expressions for: @test-add-nuw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nuw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-1 + %offset + %numIterations) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-nuw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nuw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nuw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Case where we're checking to see if add flags are valid in defining scope
; and all operands (other than addrec) are invariant
define void @test-add-scope-invariant(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-invariant'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-invariant
; CHECK-NEXT: %offset = load i32, i32* %input, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + (-1 * %offset) + %needle) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i.next = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: ((-1 * %offset) + %needle) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %of_interest = add nuw nsw i32 %i.next, %offset
; CHECK-NEXT: --> {(1 + %offset)<nuw><nsw>,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %needle LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %of_interest
; CHECK-NEXT: --> ((4 * (sext i32 {(1 + %offset)<nuw><nsw>,+,1}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 %needle to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-invariant
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %offset) + %needle)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %offset) + %needle)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
%offset = load i32, i32* %input
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%i.next = add nuw i32 %i, 1
%of_interest = add nuw nsw i32 %i.next, %offset
%gep2 = getelementptr i32, i32* %input, i32 %of_interest
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %of_interest, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Case where we're checking to see if add flags are valid in defining scope
; and other operands are *not* invariant.
define void @test-add-scope-bound(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %gep = getelementptr i32, i32* %input, i32 %i
; CHECK-NEXT: --> ((4 * (sext i32 {0,+,1}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %offset = load i32, i32* %gep, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %i.next = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %of_interest = add nuw nsw i32 %i.next, %offset
; CHECK-NEXT: --> ({1,+,1}<nuw><%loop> + %offset)<nuw><nsw> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %of_interest
; CHECK-NEXT: --> ((4 * ((sext i32 {1,+,1}<nuw><%loop> to i64) + (sext i32 %offset to i64))<nsw>)<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%gep = getelementptr i32, i32* %input, i32 %i
%offset = load i32, i32* %gep
%i.next = add nuw i32 %i, 1
%of_interest = add nuw nsw i32 %i.next, %offset
%gep2 = getelementptr i32, i32* %input, i32 %of_interest
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %of_interest, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-preheader(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-preheader'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-preheader
; CHECK-NEXT: %offset = load i32, i32* %input, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,%offset}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,%offset}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,%offset}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-preheader
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
%offset = load i32, i32* %input
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-preheader-neg1(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-preheader-neg1'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-preheader-neg1
; CHECK-NEXT: %offset = load i32, i32* %input, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,%offset}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,%offset}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,%offset}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-preheader-neg1
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
%offset = load i32, i32* %input
call void @foo()
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-preheader-neg2(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-preheader-neg2'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-preheader-neg2
; CHECK-NEXT: %offset = load i32, i32* %input, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,%offset}<nuw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,%offset}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,%offset}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-preheader-neg2
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
%offset = load i32, i32* %input
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
call void @foo()
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-header(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-header'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-header
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> %i U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep = getelementptr i32, i32* %input, i32 %i
; CHECK-NEXT: --> ((4 * (sext i32 %i to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %offset = load i32, i32* %gep, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> (%offset + %i)<nuw> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 (%offset + %i)<nuw> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-header
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%gep = getelementptr i32, i32* %input, i32 %i
%offset = load i32, i32* %gep
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-header2(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-header2'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-header2
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> %i U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep = getelementptr i32, i32* %input, i32 %i
; CHECK-NEXT: --> ((4 * (sext i32 %i to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %offset = load i32, i32* %gep, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> (%offset + %i)<nuw> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 (%offset + %i)<nuw> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-header2
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
call void @foo()
%gep = getelementptr i32, i32* %input, i32 %i
%offset = load i32, i32* %gep
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-scope-bound-unkn-header-neg(i32* %input, i32 %needle) {
; CHECK-LABEL: 'test-add-scope-bound-unkn-header-neg'
; CHECK-NEXT: Classifying expressions for: @test-add-scope-bound-unkn-header-neg
; CHECK-NEXT: %i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> %i U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep = getelementptr i32, i32* %input, i32 %i
; CHECK-NEXT: --> ((4 * (sext i32 %i to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %offset = load i32, i32* %gep, align 4
; CHECK-NEXT: --> %offset U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %i.next = add nuw i32 %i, %offset
; CHECK-NEXT: --> (%offset + %i) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %gep2 = getelementptr i32, i32* %input, i32 %i.next
; CHECK-NEXT: --> ((4 * (sext i32 (%offset + %i) to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: Determining loop execution counts for: @test-add-scope-bound-unkn-header-neg
; CHECK-NEXT: Loop %loop: Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %i.next, %loop ], [ 0, %entry ]
%gep = getelementptr i32, i32* %input, i32 %i
%offset = load i32, i32* %gep
call void @foo()
%i.next = add nuw i32 %i, %offset
%gep2 = getelementptr i32, i32* %input, i32 %i.next
store i32 0, i32* %gep2
%exitcond = icmp eq i32 %i.next, %needle
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-add-nuw-from-icmp(float* %input, i32 %offset,
; CHECK-LABEL: 'test-add-nuw-from-icmp'
; CHECK-NEXT: Classifying expressions for: @test-add-nuw-from-icmp
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nuw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %cmp.idx = sext i1 %cmp to i32
; CHECK-NEXT: --> (sext i1 %cmp to i32) U: [-1,1) S: [-1,1) Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %cmp.idx
; CHECK-NEXT: --> ((4 * (sext i1 %cmp to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %nexti = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-nuw-from-icmp
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
i32 %numIterations) {
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nuw i32 %i, %offset
%cmp = icmp sgt i32 %index32, 0
%cmp.idx = sext i1 %cmp to i32
%ptr = getelementptr inbounds float, float* %input, i32 %cmp.idx
%nexti = add nuw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; With no load to trigger UB from poison, we cannot infer nsw.
define void @test-add-no-load(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-no-load'
; CHECK-NEXT: Classifying expressions for: @test-add-no-load
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-1 + %offset + %numIterations) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-no-load
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nuw i32 %i, 1
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; The current code is only supposed to look at the loop header, so
; it should not infer nsw in this case, as that would require looking
; outside the loop header.
define void @test-add-not-header(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-not-header'
; CHECK-NEXT: Classifying expressions for: @test-add-not-header
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-1 + %offset + %numIterations) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-not-header
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
br label %loop2
loop2:
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Same thing as test-add-not-header, but in this case only the load
; instruction is outside the loop header.
define void @test-add-not-header2(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-not-header2'
; CHECK-NEXT: Classifying expressions for: @test-add-not-header2
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> {((4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-not-header2
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
br label %loop2
loop2:
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Similar to test-add-not-header, but in this case the load
; instruction may not be executed.
define void @test-add-not-header3(float* %input, i32 %offset, i32 %numIterations,
; CHECK-LABEL: 'test-add-not-header3'
; CHECK-NEXT: Classifying expressions for: @test-add-not-header3
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %cond = load volatile i1, i1* %cond_buf, align 1
; CHECK-NEXT: --> %cond U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: Determining loop execution counts for: @test-add-not-header3
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
; CHECK-NEXT: exit count for loop2: (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
i1* %cond_buf) {
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
%cond = load volatile i1, i1* %cond_buf
br i1 %cond, label %loop2, label %exit
loop2:
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Same thing as test-add-not-header2, except we have a few extra
; blocks.
define void @test-add-not-header4(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-not-header4'
; CHECK-NEXT: Classifying expressions for: @test-add-not-header4
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> {((4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-not-header4
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
br label %loop3
loop3:
br label %loop4
loop4:
br label %loop2
loop2:
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Demonstrate why we need a Visited set in llvm::programUndefinedIfPoison.
define void @test-add-not-header5(float* %input, i32 %offset) {
; CHECK-LABEL: 'test-add-not-header5'
; CHECK-NEXT: Classifying expressions for: @test-add-not-header5
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-not-header5
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
br label %loop
exit:
ret void
}
; The call instruction makes it not guaranteed that the add will be
; executed, since it could run forever or throw an exception, so we
; cannot assume that the UB is realized.
define void @test-add-call(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-call'
; CHECK-NEXT: Classifying expressions for: @test-add-call
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-1 + %offset + %numIterations) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-call
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
call void @foo()
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Same issue as test-add-call, but this time the call is between the
; producer of poison and the load that consumes it.
define void @test-add-call2(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-call2'
; CHECK-NEXT: Classifying expressions for: @test-add-call2
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {%offset,+,1}<nw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-1 + %offset + %numIterations) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-call2
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
call void @foo()
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Any poison input makes getelementptr produce poison
define void @test-gep-propagates-poison(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-gep-propagates-poison'
; CHECK-NEXT: Classifying expressions for: @test-gep-propagates-poison
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr float, float* %input, i32 %index32
; CHECK-NEXT: --> {((4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-gep-propagates-poison
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Multiplication by a non-zero constant propagates poison if there is
; a nuw or nsw flag on the multiplication.
define void @test-add-mul-propagates(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-mul-propagates'
; CHECK-NEXT: Classifying expressions for: @test-add-mul-propagates
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %indexmul = mul nuw i32 %index32, 2
; CHECK-NEXT: --> {(2 * %offset),+,2}<%loop> U: [0,-1) S: [-2147483648,2147483647) Exits: (-2 + (2 * %offset) + (2 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %indexmul
; CHECK-NEXT: --> ((4 * (sext i32 {(2 * %offset),+,2}<%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-2 + (2 * %offset) + (2 * %numIterations)) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-mul-propagates
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%indexmul = mul nuw i32 %index32, 2
%ptr = getelementptr inbounds float, float* %input, i32 %indexmul
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Any poison input to multiplication propages poison.
define void @test-mul-propagates-poison(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-mul-propagates-poison'
; CHECK-NEXT: Classifying expressions for: @test-mul-propagates-poison
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %indexmul = mul nsw i32 %index32, %offset
; CHECK-NEXT: --> {(%offset * %offset),+,%offset}<nsw><%loop> U: full-set S: full-set Exits: ((-1 + %offset + %numIterations) * %offset) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %indexmul
; CHECK-NEXT: --> {((4 * (sext i32 (%offset * %offset) to i64))<nsw> + %input),+,(4 * (sext i32 %offset to i64))<nsw>}<nw><%loop> U: full-set S: full-set Exits: ((4 * (sext i32 (%offset * %offset) to i64))<nsw> + (4 * (zext i32 (-1 + %numIterations) to i64) * (sext i32 %offset to i64)) + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-mul-propagates-poison
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%indexmul = mul nsw i32 %index32, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %indexmul
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
define void @test-mul-propagates-poison-2(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-mul-propagates-poison-2'
; CHECK-NEXT: Classifying expressions for: @test-mul-propagates-poison-2
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %indexmul = mul i32 %index32, 2
; CHECK-NEXT: --> {(2 * %offset),+,2}<%loop> U: [0,-1) S: [-2147483648,2147483647) Exits: (-2 + (2 * %offset) + (2 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %indexmul
; CHECK-NEXT: --> ((4 * (sext i32 {(2 * %offset),+,2}<%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-2 + (2 * %offset) + (2 * %numIterations)) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-mul-propagates-poison-2
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%indexmul = mul i32 %index32, 2
%ptr = getelementptr inbounds float, float* %input, i32 %indexmul
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Division by poison triggers UB.
define void @test-add-div(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-div'
; CHECK-NEXT: Classifying expressions for: @test-add-div
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %j = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %q = sdiv i32 %numIterations, %j
; CHECK-NEXT: --> %q U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-div
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%j = add nsw i32 %i, %offset
%q = sdiv i32 %numIterations, %j
%nexti = add nsw i32 %i, 1
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Remainder of poison by non-poison divisor does not trigger UB.
define void @test-add-div2(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-div2'
; CHECK-NEXT: Classifying expressions for: @test-add-div2
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %j = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %q = sdiv i32 %j, %numIterations
; CHECK-NEXT: --> %q U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-div2
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%j = add nsw i32 %i, %offset
%q = sdiv i32 %j, %numIterations
%nexti = add nsw i32 %i, 1
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Store to poison address triggers UB.
define void @test-add-store(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-store'
; CHECK-NEXT: Classifying expressions for: @test-add-store
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %i, %offset
; CHECK-NEXT: --> {%offset,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> {((4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-store
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = add nsw i32 %i, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
store float 1.0, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Three sequential adds where the middle add should have nsw. There is
; a special case for sequential adds and this test covers that. We have to
; put the final add first in the program since otherwise the special case
; is not triggered, hence the strange basic block ordering.
define void @test-add-twice(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-add-twice'
; CHECK-NEXT: Classifying expressions for: @test-add-twice
; CHECK-NEXT: %seq = add nuw nsw i32 %index32, 1
; CHECK-NEXT: --> {(2 + %offset),+,1}<nw><%loop> U: full-set S: full-set Exits: (1 + %offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %j = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = add nsw i32 %j, %offset
; CHECK-NEXT: --> {(1 + %offset)<nsw>,+,1}<nsw><%loop> U: [-2147483647,-2147483648) S: [-2147483647,-2147483648) Exits: (%offset + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> {(4 + (4 * (sext i32 %offset to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: (4 + (4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %offset to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-add-twice
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop2:
%seq = add nsw nuw i32 %index32, 1
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
%j = add nsw i32 %i, 1
%index32 = add nsw i32 %j, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
store float 1.0, float* %ptr, align 4
br label %loop2
exit:
ret void
}
; Example where a mul should get the nsw flag, so that a sext can be
; distributed over the mul.
define void @test-mul-nsw(float* %input, i32 %stride, i32 %numIterations) {
; CHECK-LABEL: 'test-mul-nsw'
; CHECK-NEXT: Classifying expressions for: @test-mul-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = mul nsw i32 %i, %stride
; CHECK-NEXT: --> {0,+,%stride}<nsw><%loop> U: full-set S: full-set Exits: ((-1 + %numIterations) * %stride) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {0,+,(sext i32 %stride to i64)}<nsw><%loop> U: [-9223372034707292160,9223372030412324866) S: [-9223372034707292160,9223372030412324866) Exits: ((zext i32 (-1 + %numIterations) to i64) * (sext i32 %stride to i64)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {%input,+,(4 * (sext i32 %stride to i64))<nsw>}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64) * (sext i32 %stride to i64)) + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-mul-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = mul nsw i32 %i, %stride
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a mul should get the nuw flag.
define void @test-mul-nuw(float* %input, i32 %stride, i32 %numIterations) {
; CHECK-LABEL: 'test-mul-nuw'
; CHECK-NEXT: Classifying expressions for: @test-mul-nuw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = mul nuw i32 %i, %stride
; CHECK-NEXT: --> {0,+,%stride}<nuw><%loop> U: full-set S: full-set Exits: ((-1 + %numIterations) * %stride) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {0,+,%stride}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 ((-1 + %numIterations) * %stride) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-mul-nuw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = mul nuw i32 %i, %stride
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nuw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should get the nsw flag, so that a sext can be
; distributed over the shl.
define void @test-shl-nsw(float* %input, i32 %start, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-nsw'
; CHECK-NEXT: Classifying expressions for: @test-shl-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nsw i32 %i, 8
; CHECK-NEXT: --> {(256 * %start),+,256}<nsw><%loop> U: [0,-255) S: [-2147483648,2147483393) Exits: (-256 + (256 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {(sext i32 (256 * %start) to i64),+,256}<nsw><%loop> U: [0,-255) S: [-2147483648,1101659110913) Exits: ((sext i32 (256 * %start) to i64) + (256 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw><nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 (256 * %start) to i64))<nsw> + %input),+,1024}<nw><%loop> U: full-set S: full-set Exits: ((4 * (sext i32 (256 * %start) to i64))<nsw> + (1024 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw><nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = shl nsw i32 %i, 8
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should get the nuw flag
define void @test-shl-nuw-edgecase(float* %input, i32 %start, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-nuw-edgecase'
; CHECK-NEXT: Classifying expressions for: @test-shl-nuw-edgecase
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nuw i32 %i, 31
; CHECK-NEXT: --> {(-2147483648 * %start),+,-2147483648}<%loop> U: [0,-2147483647) S: [-2147483648,1) Exits: (-2147483648 + (-2147483648 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> (sext i32 {(-2147483648 * %start),+,-2147483648}<%loop> to i64) U: [0,-2147483647) S: [-2147483648,1) Exits: (sext i32 (-2147483648 + (-2147483648 * %numIterations)) to i64) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> ((4 * (sext i32 {(-2147483648 * %start),+,-2147483648}<%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-2147483648 + (-2147483648 * %numIterations)) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-nuw-edgecase
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = shl nuw i32 %i, 31
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should get the nuw flag
define void @test-shl-nuw-nsw(float* %input, i32 %start, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-nuw-nsw'
; CHECK-NEXT: Classifying expressions for: @test-shl-nuw-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nuw nsw i32 %i, 31
; CHECK-NEXT: --> {(-2147483648 * %start),+,-2147483648}<nsw><%loop> U: [0,-2147483647) S: [-2147483648,1) Exits: (-2147483648 + (-2147483648 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {(sext i32 (-2147483648 * %start) to i64),+,-2147483648}<nsw><%loop> U: [0,-2147483647) S: [-9223372036854775808,1) Exits: ((sext i32 (-2147483648 * %start) to i64) + (-2147483648 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 (-2147483648 * %start) to i64))<nsw> + %input),+,-8589934592}<nw><%loop> U: full-set S: full-set Exits: ((4 * (sext i32 (-2147483648 * %start) to i64))<nsw> + (-8589934592 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64)) + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-nuw-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = shl nuw nsw i32 %i, 31
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should not get the nsw flag
define void @test-shl-no-nsw(float* %input, i32 %start, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-no-nsw'
; CHECK-NEXT: Classifying expressions for: @test-shl-no-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nsw i32 %i, 31
; CHECK-NEXT: --> {(-2147483648 * %start),+,-2147483648}<%loop> U: [0,-2147483647) S: [-2147483648,1) Exits: (-2147483648 + (-2147483648 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> (sext i32 {(-2147483648 * %start),+,-2147483648}<%loop> to i64) U: [0,-2147483647) S: [-2147483648,1) Exits: (sext i32 (-2147483648 + (-2147483648 * %numIterations)) to i64) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> ((4 * (sext i32 {(-2147483648 * %start),+,-2147483648}<%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-2147483648 + (-2147483648 * %numIterations)) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-no-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = shl nsw i32 %i, 31
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should get the nsw flag.
define void @test-shl-nsw-edgecase(float* %input, i32 %start, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-nsw-edgecase'
; CHECK-NEXT: Classifying expressions for: @test-shl-nsw-edgecase
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nsw i32 %i, 30
; CHECK-NEXT: --> {(1073741824 * %start),+,1073741824}<nsw><%loop> U: [0,-1073741823) S: [-2147483648,1073741825) Exits: (-1073741824 + (1073741824 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {(sext i32 (1073741824 * %start) to i64),+,1073741824}<nsw><%loop> U: [0,-1073741823) S: [-2147483648,4611686018427387905) Exits: ((sext i32 (1073741824 * %start) to i64) + (1073741824 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw><nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 (1073741824 * %start) to i64))<nsw> + %input),+,4294967296}<nw><%loop> U: full-set S: full-set Exits: ((4 * (sext i32 (1073741824 * %start) to i64))<nsw> + (4294967296 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-nsw-edgecase
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = shl nsw i32 %i, 30
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a shl should get the nuw flag.
define void @test-shl-nuw(float* %input, i32 %numIterations) {
; CHECK-LABEL: 'test-shl-nuw'
; CHECK-NEXT: Classifying expressions for: @test-shl-nuw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = shl nuw i32 %i, 9
; CHECK-NEXT: --> {0,+,512}<nuw><%loop> U: [0,-511) S: [-2147483648,2147483137) Exits: (-512 + (512 * %numIterations)) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> ((4 * (sext i32 {0,+,512}<nuw><%loop> to i64))<nsw> + %input) U: full-set S: full-set Exits: ((4 * (sext i32 (-512 + (512 * %numIterations)) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nuw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-shl-nuw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = shl nuw i32 %i, 9
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nuw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a sub should *not* get the nsw flag, because of how
; scalar evolution represents A - B as A + (-B) and -B can wrap even
; in cases where A - B does not.
define void @test-sub-no-nsw(float* %input, i32 %start, i32 %sub, i32 %numIterations) {
; CHECK-LABEL: 'test-sub-no-nsw'
; CHECK-NEXT: Classifying expressions for: @test-sub-no-nsw
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = sub nsw i32 %i, %sub
; CHECK-NEXT: --> {((-1 * %sub) + %start),+,1}<nw><%loop> U: full-set S: full-set Exits: (-1 + (-1 * %sub) + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {((sext i32 %start to i64) + (-1 * (sext i32 %sub to i64))<nsw>)<nsw>,+,1}<nsw><%loop> U: [-4294967295,8589934591) S: [-4294967295,8589934591) Exits: ((zext i32 (-1 + (-1 * %start) + %numIterations) to i64) + (sext i32 %start to i64) + (-1 * (sext i32 %sub to i64))<nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 %start to i64))<nsw> + (-4 * (sext i32 %sub to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %start to i64))<nsw> + (-4 * (sext i32 %sub to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-sub-no-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = sub nsw i32 %i, %sub
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a sub should get the nsw flag as the RHS cannot be the
; minimal signed value.
define void @test-sub-nsw(float* %input, i32 %start, i32 %sub, i32 %numIterations) {
; CHECK-LABEL: 'test-sub-nsw'
; CHECK-NEXT: Classifying expressions for: @test-sub-nsw
; CHECK-NEXT: %halfsub = ashr i32 %sub, 1
; CHECK-NEXT: --> %halfsub U: [-1073741824,1073741824) S: [-1073741824,1073741824)
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
; CHECK-NEXT: --> {%start,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = sub nsw i32 %i, %halfsub
; CHECK-NEXT: --> {((-1 * %halfsub)<nsw> + %start)<nsw>,+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + (-1 * %halfsub)<nsw> + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {((sext i32 %start to i64) + (-1 * (sext i32 %halfsub to i64))<nsw>)<nsw>,+,1}<nsw><%loop> U: [-3221225471,7516192767) S: [-3221225471,7516192767) Exits: ((zext i32 (-1 + (-1 * %start) + %numIterations) to i64) + (sext i32 %start to i64) + (-1 * (sext i32 %halfsub to i64))<nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((4 * (sext i32 %start to i64))<nsw> + (-4 * (sext i32 %halfsub to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + (-1 * %start) + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 %start to i64))<nsw> + (-4 * (sext i32 %halfsub to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {(1 + %start),+,1}<nsw><%loop> U: full-set S: full-set Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-sub-nsw
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + (-1 * %start) + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
%halfsub = ashr i32 %sub, 1
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ %start, %entry ]
%index32 = sub nsw i32 %i, %halfsub
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example where a sub should get the nsw flag, since the LHS is non-negative,
; which implies that the RHS cannot be the minimal signed value.
define void @test-sub-nsw-lhs-non-negative(float* %input, i32 %sub, i32 %numIterations) {
; CHECK-LABEL: 'test-sub-nsw-lhs-non-negative'
; CHECK-NEXT: Classifying expressions for: @test-sub-nsw-lhs-non-negative
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = sub nsw i32 %i, %sub
; CHECK-NEXT: --> {(-1 * %sub),+,1}<nsw><%loop> U: full-set S: full-set Exits: (-1 + (-1 * %sub) + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index64 = sext i32 %index32 to i64
; CHECK-NEXT: --> {(-1 * (sext i32 %sub to i64))<nsw>,+,1}<nsw><%loop> U: [-2147483647,6442450944) S: [-2147483647,6442450944) Exits: ((zext i32 (-1 + %numIterations) to i64) + (-1 * (sext i32 %sub to i64))<nsw>) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((-4 * (sext i32 %sub to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: ((4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (-4 * (sext i32 %sub to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-sub-nsw-lhs-non-negative
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%index32 = sub nsw i32 %i, %sub
%index64 = sext i32 %index32 to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Example checking that a sext is pushed onto a sub's operands if the sub is an
; overflow intrinsic.
define void @test-sext-sub(float* %input, i32 %sub, i32 %numIterations) {
; CHECK-LABEL: 'test-sext-sub'
; CHECK-NEXT: Classifying expressions for: @test-sext-sub
; CHECK-NEXT: %i = phi i32 [ %nexti, %cont ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %val = extractvalue { i32, i1 } %ssub, 0
; CHECK-NEXT: --> {(-1 * %sub),+,1}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ovfl = extractvalue { i32, i1 } %ssub, 1
; CHECK-NEXT: --> %ovfl U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
; CHECK-NEXT: %index64 = sext i32 %val to i64
; CHECK-NEXT: --> {(-1 * (sext i32 %sub to i64))<nsw>,+,1}<nsw><%loop> U: [-2147483647,6442450944) S: [-2147483647,6442450944) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i64 %index64
; CHECK-NEXT: --> {((-4 * (sext i32 %sub to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><%loop> U: [1,0) S: [1,0) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-sext-sub
; CHECK-NEXT: Loop %loop: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: exit count for loop: ***COULDNOTCOMPUTE***
; CHECK-NEXT: exit count for cont: (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Unpredictable predicated backedge-taken count.
;
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %cont ], [ 0, %entry ]
%ssub = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %i, i32 %sub)
%val = extractvalue { i32, i1 } %ssub, 0
%ovfl = extractvalue { i32, i1 } %ssub, 1
br i1 %ovfl, label %trap, label %cont
trap:
tail call void @llvm.trap()
unreachable
cont:
%index64 = sext i32 %val to i64
%ptr = getelementptr inbounds float, float* %input, i64 %index64
%nexti = add nsw i32 %i, 1
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}
; Two adds with a sub in the middle and the sub should have nsw. There is
; a special case for sequential adds/subs and this test covers that. We have to
; put the final add first in the program since otherwise the special case
; is not triggered, hence the strange basic block ordering.
define void @test-sub-with-add(float* %input, i32 %offset, i32 %numIterations) {
; CHECK-LABEL: 'test-sub-with-add'
; CHECK-NEXT: Classifying expressions for: @test-sub-with-add
; CHECK-NEXT: %seq = add nuw nsw i32 %index32, 1
; CHECK-NEXT: --> {(2 + (-1 * %offset)),+,1}<nw><%loop> U: full-set S: full-set Exits: (1 + (-1 * %offset) + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop> U: [0,-2147483648) S: [0,-2147483648) Exits: (-1 + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %j = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %index32 = sub nsw i32 %j, %offset
; CHECK-NEXT: --> {(1 + (-1 * %offset))<nsw>,+,1}<nsw><%loop> U: [-2147483647,-2147483648) S: [-2147483647,-2147483648) Exits: ((-1 * %offset) + %numIterations) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %ptr = getelementptr inbounds float, float* %input, i32 %index32
; CHECK-NEXT: --> {(4 + (4 * (sext i32 (-1 * %offset) to i64))<nsw> + %input),+,4}<nw><%loop> U: full-set S: full-set Exits: (4 + (4 * (zext i32 (-1 + %numIterations) to i64))<nuw><nsw> + (4 * (sext i32 (-1 * %offset) to i64))<nsw> + %input) LoopDispositions: { %loop: Computable }
; CHECK-NEXT: %nexti = add nsw i32 %i, 1
; CHECK-NEXT: --> {1,+,1}<nuw><nsw><%loop> U: [1,-2147483648) S: [1,-2147483648) Exits: %numIterations LoopDispositions: { %loop: Computable }
; CHECK-NEXT: Determining loop execution counts for: @test-sub-with-add
; CHECK-NEXT: Loop %loop: backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Loop %loop: max backedge-taken count is -1
; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (-1 + %numIterations)
; CHECK-NEXT: Predicates:
; CHECK: Loop %loop: Trip multiple is 1
;
entry:
br label %loop
loop2:
%seq = add nsw nuw i32 %index32, 1
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
loop:
%i = phi i32 [ %nexti, %loop2 ], [ 0, %entry ]
%j = add nsw i32 %i, 1
%index32 = sub nsw i32 %j, %offset
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%nexti = add nsw i32 %i, 1
store float 1.0, float* %ptr, align 4
br label %loop2
exit:
ret void
}
; PR28932: Don't assert on non-SCEV-able value %2.
%struct.anon = type { i8* }
@a = common global %struct.anon* null, align 8
@b = common global i32 0, align 4
declare { i32, i1 } @llvm.ssub.with.overflow.i32(i32, i32)
declare void @llvm.trap()
define i32 @pr28932() {
; CHECK-LABEL: 'pr28932'
; CHECK-NEXT: Classifying expressions for: @pr28932
; CHECK-NEXT: %pre = load %struct.anon*, %struct.anon** @a, align 8
; CHECK-NEXT: --> %pre U: full-set S: full-set
; CHECK-NEXT: %pre7 = load i32, i32* @b, align 4
; CHECK-NEXT: --> %pre7 U: full-set S: full-set
; CHECK-NEXT: %0 = phi i32 [ %3, %cont6 ], [ %pre7, %entry ]
; CHECK-NEXT: --> {%pre7,+,-1}<%for.cond> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Computable }
; CHECK-NEXT: %1 = phi %struct.anon* [ %ph, %cont6 ], [ %pre, %entry ]
; CHECK-NEXT: --> %1 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %3 = extractvalue { i32, i1 } %2, 0
; CHECK-NEXT: --> {(-1 + %pre7),+,-1}<%for.cond> U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Computable }
; CHECK-NEXT: %4 = extractvalue { i32, i1 } %2, 1
; CHECK-NEXT: --> %4 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %idxprom = sext i32 %3 to i64
; CHECK-NEXT: --> (sext i32 {(-1 + %pre7),+,-1}<%for.cond> to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648) Exits: <<Unknown>> LoopDispositions: { %for.cond: Computable }
; CHECK-NEXT: %5 = getelementptr inbounds %struct.anon, %struct.anon* %1, i64 0, i32 0
; CHECK-NEXT: --> %1 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %6 = load i8*, i8** %5, align 8
; CHECK-NEXT: --> %6 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %7 = getelementptr inbounds i8, i8* %6, i64 %idxprom
; CHECK-NEXT: --> ((sext i32 {(-1 + %pre7),+,-1}<%for.cond> to i64) + %6) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %8 = load i8, i8* %7, align 1
; CHECK-NEXT: --> %8 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %conv5 = sext i8 %8 to i64
; CHECK-NEXT: --> (sext i8 %8 to i64) U: [-128,128) S: [-128,128) Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %9 = inttoptr i64 %conv5 to %struct.anon*
; CHECK-NEXT: --> %9 U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: %ph = phi %struct.anon* [ %9, %cont1 ], [ %1, %if.then ]
; CHECK-NEXT: --> %ph U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %for.cond: Variant }
; CHECK-NEXT: Determining loop execution counts for: @pr28932
; CHECK-NEXT: Loop %for.cond: <multiple exits> Unpredictable backedge-taken count.
; CHECK-NEXT: exit count for if.then: ***COULDNOTCOMPUTE***
; CHECK-NEXT: exit count for if.else: ***COULDNOTCOMPUTE***
; CHECK-NEXT: Loop %for.cond: Unpredictable max backedge-taken count.
; CHECK-NEXT: Loop %for.cond: Unpredictable predicated backedge-taken count.
;
entry:
%pre = load %struct.anon*, %struct.anon** @a, align 8
%pre7 = load i32, i32* @b, align 4
br label %for.cond
for.cond: ; preds = %cont6, %entry
%0 = phi i32 [ %3, %cont6 ], [ %pre7, %entry ]
%1 = phi %struct.anon* [ %ph, %cont6 ], [ %pre, %entry ]
%tobool = icmp eq %struct.anon* %1, null
%2 = tail call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %0, i32 1)
%3 = extractvalue { i32, i1 } %2, 0
%4 = extractvalue { i32, i1 } %2, 1
%idxprom = sext i32 %3 to i64
%5 = getelementptr inbounds %struct.anon, %struct.anon* %1, i64 0, i32 0
%6 = load i8*, i8** %5, align 8
%7 = getelementptr inbounds i8, i8* %6, i64 %idxprom
%8 = load i8, i8* %7, align 1
br i1 %tobool, label %if.else, label %if.then
if.then: ; preds = %for.cond
br i1 %4, label %trap, label %cont6
trap: ; preds = %if.else, %if.then
tail call void @llvm.trap()
unreachable
if.else: ; preds = %for.cond
br i1 %4, label %trap, label %cont1
cont1: ; preds = %if.else
%conv5 = sext i8 %8 to i64
%9 = inttoptr i64 %conv5 to %struct.anon*
store %struct.anon* %9, %struct.anon** @a, align 8
br label %cont6
cont6: ; preds = %cont1, %if.then
%ph = phi %struct.anon* [ %9, %cont1 ], [ %1, %if.then ]
store i32 %3, i32* @b, align 4
br label %for.cond
}
define noundef i32 @add-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'add-basic'
; CHECK-NEXT: Classifying expressions for: @add-basic
; CHECK-NEXT: %res = add nuw nsw i32 %a, %b
; CHECK-NEXT: --> (%a + %b)<nuw><nsw> U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-basic
;
%res = add nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @sub-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'sub-basic'
; CHECK-NEXT: Classifying expressions for: @sub-basic
; CHECK-NEXT: %res = sub nuw nsw i32 %a, %b
; CHECK-NEXT: --> ((-1 * %b) + %a) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @sub-basic
;
%res = sub nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @mul-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'mul-basic'
; CHECK-NEXT: Classifying expressions for: @mul-basic
; CHECK-NEXT: %res = mul nuw nsw i32 %a, %b
; CHECK-NEXT: --> (%a * %b)<nuw><nsw> U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @mul-basic
;
%res = mul nuw nsw i32 %a, %b
ret i32 %res
}
define noundef i32 @udiv-basic(i32 %a, i32 %b) {
; CHECK-LABEL: 'udiv-basic'
; CHECK-NEXT: Classifying expressions for: @udiv-basic
; CHECK-NEXT: %res = udiv exact i32 %a, %b
; CHECK-NEXT: --> (%a /u %b) U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @udiv-basic
;
%res = udiv exact i32 %a, %b
ret i32 %res
}
@gA = external global i32
@gB = external global i32
@gC = external global i32
@gD = external global i32
define noundef i64 @add-zext-recurse(i64 %arg) {
; CHECK-LABEL: 'add-zext-recurse'
; CHECK-NEXT: Classifying expressions for: @add-zext-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = zext i32 %a to i64
; CHECK-NEXT: --> (zext i32 %a to i64) U: [0,4294967296) S: [0,4294967296)
; CHECK-NEXT: %res = add nuw i64 %x, %arg
; CHECK-NEXT: --> ((zext i32 %a to i64) + %arg)<nuw> U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-zext-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = zext i32 %a to i64
%res = add nuw i64 %x, %arg
ret i64 %res
}
define noundef i64 @add-sext-recurse(i64 %arg) {
; CHECK-LABEL: 'add-sext-recurse'
; CHECK-NEXT: Classifying expressions for: @add-sext-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = sext i32 %a to i64
; CHECK-NEXT: --> (sext i32 %a to i64) U: [-2147483648,2147483648) S: [-2147483648,2147483648)
; CHECK-NEXT: %res = add nuw i64 %x, %arg
; CHECK-NEXT: --> ((sext i32 %a to i64) + %arg)<nuw> U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-sext-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = sext i32 %a to i64
%res = add nuw i64 %x, %arg
ret i64 %res
}
define noundef i16 @add-trunc-recurse() {
; CHECK-LABEL: 'add-trunc-recurse'
; CHECK-NEXT: Classifying expressions for: @add-trunc-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = trunc i32 %a to i16
; CHECK-NEXT: --> (trunc i32 %a to i16) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i16 %x, 1
; CHECK-NEXT: --> (1 + (trunc i32 %a to i16))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-trunc-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = trunc i32 %a to i16
%res = add nuw i16 %x, 1
ret i16 %res
}
define noundef i32 @add-udiv-recurse(i32 %arg) {
; CHECK-LABEL: 'add-udiv-recurse'
; CHECK-NEXT: Classifying expressions for: @add-udiv-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = udiv i32 %a, %arg
; CHECK-NEXT: --> (%a /u %arg) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (%a /u %arg))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-udiv-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = udiv i32 %a, %arg
%res = add nuw i32 %x, 1
ret i32 %res
}
define noundef i32 @add-mul-recurse() {
; CHECK-LABEL: 'add-mul-recurse'
; CHECK-NEXT: Classifying expressions for: @add-mul-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = mul i32 %a, 3
; CHECK-NEXT: --> (3 * %a) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (3 * %a))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-mul-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = mul i32 %a, 3
%res = add nuw i32 %x, 1
ret i32 %res
}
declare i32 @llvm.smin.i32(i32, i32)
declare i32 @llvm.smax.i32(i32, i32)
declare i32 @llvm.umin.i32(i32, i32)
declare i32 @llvm.umax.i32(i32, i32)
define noundef i32 @add-smin-recurse(i32 %arg) {
; CHECK-LABEL: 'add-smin-recurse'
; CHECK-NEXT: Classifying expressions for: @add-smin-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = call i32 @llvm.smin.i32(i32 %a, i32 %arg)
; CHECK-NEXT: --> (%arg smin %a) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (%arg smin %a))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-smin-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = call i32 @llvm.smin.i32(i32 %a, i32 %arg)
%res = add nuw i32 %x, 1
ret i32 %res
}
define noundef i32 @add-smax-recurse(i32 %arg) {
; CHECK-LABEL: 'add-smax-recurse'
; CHECK-NEXT: Classifying expressions for: @add-smax-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = call i32 @llvm.smax.i32(i32 %a, i32 %arg)
; CHECK-NEXT: --> (%arg smax %a) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (%arg smax %a))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-smax-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = call i32 @llvm.smax.i32(i32 %a, i32 %arg)
%res = add nuw i32 %x, 1
ret i32 %res
}
define noundef i32 @add-umin-recurse(i32 %arg) {
; CHECK-LABEL: 'add-umin-recurse'
; CHECK-NEXT: Classifying expressions for: @add-umin-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = call i32 @llvm.umin.i32(i32 %a, i32 %arg)
; CHECK-NEXT: --> (%arg umin %a) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (%arg umin %a))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-umin-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = call i32 @llvm.umin.i32(i32 %a, i32 %arg)
%res = add nuw i32 %x, 1
ret i32 %res
}
define noundef i32 @add-umax-recurse(i32 %arg) {
; CHECK-LABEL: 'add-umax-recurse'
; CHECK-NEXT: Classifying expressions for: @add-umax-recurse
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %x = call i32 @llvm.umax.i32(i32 %a, i32 %arg)
; CHECK-NEXT: --> (%arg umax %a) U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, 1
; CHECK-NEXT: --> (1 + (%arg umax %a))<nuw> U: [1,0) S: [1,0)
; CHECK-NEXT: Determining loop execution counts for: @add-umax-recurse
;
call void @foo()
%a = load i32, i32* @gA
%x = call i32 @llvm.umax.i32(i32 %a, i32 %arg)
%res = add nuw i32 %x, 1
ret i32 %res
}
define noundef i32 @add-recurse-inline() {
; CHECK-LABEL: 'add-recurse-inline'
; CHECK-NEXT: Classifying expressions for: @add-recurse-inline
; CHECK-NEXT: %a = load i32, i32* @gA, align 4
; CHECK-NEXT: --> %a U: full-set S: full-set
; CHECK-NEXT: %b = load i32, i32* @gB, align 4
; CHECK-NEXT: --> %b U: full-set S: full-set
; CHECK-NEXT: %c = load i32, i32* @gC, align 4
; CHECK-NEXT: --> %c U: full-set S: full-set
; CHECK-NEXT: %d = load i32, i32* @gD, align 4
; CHECK-NEXT: --> %d U: full-set S: full-set
; CHECK-NEXT: %x = add nuw i32 %a, %b
; CHECK-NEXT: --> (%a + %b)<nuw> U: full-set S: full-set
; CHECK-NEXT: %y = add nuw i32 %c, %d
; CHECK-NEXT: --> (%c + %d)<nuw> U: full-set S: full-set
; CHECK-NEXT: %res = add nuw i32 %x, %y
; CHECK-NEXT: --> (%a + %b + %c + %d)<nuw> U: full-set S: full-set
; CHECK-NEXT: Determining loop execution counts for: @add-recurse-inline
;
call void @foo()
%a = load i32, i32* @gA
%b = load i32, i32* @gB
%c = load i32, i32* @gC
%d = load i32, i32* @gD
%x = add nuw i32 %a, %b
%y = add nuw i32 %c, %d
%res = add nuw i32 %x, %y
ret i32 %res
}