test/Analysis/ScalarEvolution/overflow-intrinsics-trip-count.ll

; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s

declare { i16, i1 } @llvm.sadd.with.overflow.i16(i16, i16) nounwind readnone
declare { i16, i1 } @llvm.uadd.with.overflow.i16(i16, i16) nounwind readnone
declare { i16, i1 } @llvm.ssub.with.overflow.i16(i16, i16) nounwind readnone
declare { i16, i1 } @llvm.usub.with.overflow.i16(i16, i16) nounwind readnone
declare { i16, i1 } @llvm.smul.with.overflow.i16(i16, i16) nounwind readnone
declare { i16, i1 } @llvm.umul.with.overflow.i16(i16, i16) nounwind readnone

define void @uadd_exhaustive() {
; CHECK-LABEL: 'uadd_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @uadd_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 35
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 35
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 35
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 36
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ 65500, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.uadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @sadd_exhaustive() {
; CHECK-LABEL: 'sadd_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @sadd_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 67
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 67
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 67
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 68
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ 32700, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.sadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @usub_exhaustive() {
; CHECK-LABEL: 'usub_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @usub_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 50
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 50
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 50
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 51
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ 50, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.usub.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @ssub_exhaustive() {
; CHECK-LABEL: 'ssub_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @ssub_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 68
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 68
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 68
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 69
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ -32700, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.ssub.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @smul_exhaustive() {
; CHECK-LABEL: 'smul_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @smul_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 14
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 14
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 14
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 15
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ 1, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.smul.with.overflow.i16(i16 %indvars.iv, i16 2)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @umul_exhaustive() {
; CHECK-LABEL: 'umul_exhaustive'
; CHECK-NEXT:  Determining loop execution counts for: @umul_exhaustive
; CHECK-NEXT:  Loop %for.body: backedge-taken count is 15
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is 15
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is 15
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 16
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ 1, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 %indvars.iv, i16 2)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @uadd_symbolic_start(i16 %start) {
; CHECK-LABEL: 'uadd_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @uadd_symbolic_start
; CHECK-NEXT:  Loop %for.body: backedge-taken count is (-1 + (-1 * %start))
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is (-1 + (-1 * %start))
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 1
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.uadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @sadd_symbolic_start(i16 %start) {
; CHECK-LABEL: 'sadd_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @sadd_symbolic_start
; CHECK-NEXT:  Loop %for.body: backedge-taken count is (32767 + (-1 * %start))
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is (32767 + (-1 * %start))
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 1
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.sadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @sadd_symbolic_start2(i16 %start) {
; CHECK-LABEL: 'sadd_symbolic_start2'
; CHECK-NEXT:  Determining loop execution counts for: @sadd_symbolic_start2
; CHECK-NEXT:  Loop %for.body: Unpredictable backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable max backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable predicated backedge-taken count.
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.sadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  %not = xor i1 true, %ov
  br i1 %not, label %for.body, label %for.end

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @sadd_symbolic_swapped(i16 %start) {
; CHECK-LABEL: 'sadd_symbolic_swapped'
; CHECK-NEXT:  Determining loop execution counts for: @sadd_symbolic_swapped
; CHECK-NEXT:  Loop %for.body: Unpredictable backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable max backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable predicated backedge-taken count.
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.sadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.body, label %for.end

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @usub_symbolic_start(i16 %start) {
; CHECK-LABEL: 'usub_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @usub_symbolic_start
; CHECK-NEXT:  Loop %for.body: backedge-taken count is %start
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is %start
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 1
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.usub.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @ssub_symbolic_start(i16 %start) {
; CHECK-LABEL: 'ssub_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @ssub_symbolic_start
; CHECK-NEXT:  Loop %for.body: backedge-taken count is (-32768 + %start)
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is (-32768 + %start)
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 1
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.ssub.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @smul_symbolic_start(i16 %start) {
; CHECK-LABEL: 'smul_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @smul_symbolic_start
; CHECK-NEXT:  Loop %for.body: Unpredictable backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable max backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable predicated backedge-taken count.
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.smul.with.overflow.i16(i16 %indvars.iv, i16 2)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @umul_symbolic_start(i16 %start) {
; CHECK-LABEL: 'umul_symbolic_start'
; CHECK-NEXT:  Determining loop execution counts for: @umul_symbolic_start
; CHECK-NEXT:  Loop %for.body: Unpredictable backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable max backedge-taken count.
; CHECK-NEXT:  Loop %for.body: Unpredictable predicated backedge-taken count.
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.body ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 %indvars.iv, i16 2)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}

define void @sadd_symbolic_non_latch(i16 %start) {
; CHECK-LABEL: 'sadd_symbolic_non_latch'
; CHECK-NEXT:  Determining loop execution counts for: @sadd_symbolic_non_latch
; CHECK-NEXT:  Loop %for.body: <multiple exits> backedge-taken count is ((230 + (-1 * %start)) umin (32767 + (-1 * %start)))
; CHECK-NEXT:    exit count for for.body: (32767 + (-1 * %start))
; CHECK-NEXT:    exit count for for.latch: (230 + (-1 * %start))
; CHECK-NEXT:  Loop %for.body: max backedge-taken count is -1
; CHECK-NEXT:  Loop %for.body: Predicated backedge-taken count is ((230 + (-1 * %start)) umin (32767 + (-1 * %start)))
; CHECK-NEXT:   Predicates:
; CHECK:       Loop %for.body: Trip multiple is 1
;
entry:
  br i1 undef, label %for.end, label %for.body.preheader

for.body.preheader:                               ; preds = %entry
  br label %for.body

for.body:                                         ; preds = %for.body.preheader, %for.body
  %indvars.iv = phi i16 [ %math, %for.latch ], [ %start, %for.body.preheader ]
  %0 = call { i16, i1 } @llvm.sadd.with.overflow.i16(i16 %indvars.iv, i16 1)
  %math = extractvalue { i16, i1 } %0, 0
  %ov = extractvalue { i16, i1 } %0, 1
  br i1 %ov, label %for.end, label %for.latch

for.latch:
  %cmp = icmp eq i16 %math, 231
  br i1 %cmp, label %for.end, label %for.body

for.end:                                          ; preds = %for.body, %entry
  ret void
}