test/Transforms/LoopReroll/extra_instr.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=loop-reroll   %s | FileCheck %s
target triple = "aarch64--linux-gnu"

define void @rerollable1(ptr nocapture %a) {
; CHECK-LABEL: define void @rerollable1
; CHECK-SAME: (ptr nocapture [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = shl nuw nsw i64 [[IV]], 2
; CHECK-NEXT:    [[TMP1:%.*]] = add i64 [[TMP0]], 160
; CHECK-NEXT:    [[SCEVGEP1:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP1]]
; CHECK-NEXT:    [[TMP2:%.*]] = shl nuw nsw i64 [[IV]], 2
; CHECK-NEXT:    [[TMP3:%.*]] = add i64 [[TMP2]], 80
; CHECK-NEXT:    [[SCEVGEP:%.*]] = getelementptr i8, ptr [[A]], i64 [[TMP3]]
; CHECK-NEXT:    [[VALUE0:%.*]] = load i32, ptr [[SCEVGEP1]], align 4
; CHECK-NEXT:    store i32 [[VALUE0]], ptr [[SCEVGEP]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND2:%.*]] = icmp eq i64 [[IV]], 9
; CHECK-NEXT:    br i1 [[EXITCOND2]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:


  ; base instruction
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]

  ; NO unrerollable instructions

  ; extra simple arithmetic operations, used by root instructions
  %plus20 = add nuw nsw i64 %iv, 20
  %plus10 = add nuw nsw i64 %iv, 10

  ; root instruction 0
  %ldptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 0
  %value0 = load i32, ptr %ldptr0, align 4
  %stptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 0
  store i32 %value0, ptr %stptr0, align 4

  ; root instruction 1
  %ldptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 1
  %value1 = load i32, ptr %ldptr1, align 4
  %stptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 1
  store i32 %value1, ptr %stptr1, align 4

  ; loop-increment
  %iv.next = add nuw nsw i64 %iv, 1

  ; latch
  %exitcond = icmp eq i64 %iv.next, 5
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define void @unrerollable1(ptr nocapture %a) {
; CHECK-LABEL: define void @unrerollable1
; CHECK-SAME: (ptr nocapture [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[STPTRX:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[IV]], i64 0
; CHECK-NEXT:    store i32 999, ptr [[STPTRX]], align 4
; CHECK-NEXT:    [[PLUS20:%.*]] = add nuw nsw i64 [[IV]], 20
; CHECK-NEXT:    [[PLUS10:%.*]] = add nuw nsw i64 [[IV]], 10
; CHECK-NEXT:    [[LDPTR0:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS20]], i64 0
; CHECK-NEXT:    [[VALUE0:%.*]] = load i32, ptr [[LDPTR0]], align 4
; CHECK-NEXT:    [[STPTR0:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS10]], i64 0
; CHECK-NEXT:    store i32 [[VALUE0]], ptr [[STPTR0]], align 4
; CHECK-NEXT:    [[LDPTR1:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS20]], i64 1
; CHECK-NEXT:    [[VALUE1:%.*]] = load i32, ptr [[LDPTR1]], align 4
; CHECK-NEXT:    [[STPTR1:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS10]], i64 1
; CHECK-NEXT:    store i32 [[VALUE1]], ptr [[STPTR1]], align 4
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 5
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:


  ; base instruction
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]

  ; unrerollable instructions using %iv
  %stptrx = getelementptr inbounds [2 x i32], ptr %a, i64 %iv, i64 0
  store i32 999, ptr %stptrx, align 4

  ; extra simple arithmetic operations, used by root instructions
  %plus20 = add nuw nsw i64 %iv, 20
  %plus10 = add nuw nsw i64 %iv, 10

  ; root instruction 0
  %ldptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 0
  %value0 = load i32, ptr %ldptr0, align 4
  %stptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 0
  store i32 %value0, ptr %stptr0, align 4

  ; root instruction 1
  %ldptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 1
  %value1 = load i32, ptr %ldptr1, align 4
  %stptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 1
  store i32 %value1, ptr %stptr1, align 4

  ; loop-increment
  %iv.next = add nuw nsw i64 %iv, 1

  ; latch
  %exitcond = icmp eq i64 %iv.next, 5
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define void @unrerollable2(ptr nocapture %a) {
; CHECK-LABEL: define void @unrerollable2
; CHECK-SAME: (ptr nocapture [[A:%.*]]) {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT:    [[STPTRX:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[IV_NEXT]], i64 0
; CHECK-NEXT:    store i32 999, ptr [[STPTRX]], align 4
; CHECK-NEXT:    [[PLUS20:%.*]] = add nuw nsw i64 [[IV]], 20
; CHECK-NEXT:    [[PLUS10:%.*]] = add nuw nsw i64 [[IV]], 10
; CHECK-NEXT:    [[LDPTR0:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS20]], i64 0
; CHECK-NEXT:    [[VALUE0:%.*]] = load i32, ptr [[LDPTR0]], align 4
; CHECK-NEXT:    [[STPTR0:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS10]], i64 0
; CHECK-NEXT:    store i32 [[VALUE0]], ptr [[STPTR0]], align 4
; CHECK-NEXT:    [[LDPTR1:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS20]], i64 1
; CHECK-NEXT:    [[VALUE1:%.*]] = load i32, ptr [[LDPTR1]], align 4
; CHECK-NEXT:    [[STPTR1:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i64 [[PLUS10]], i64 1
; CHECK-NEXT:    store i32 [[VALUE1]], ptr [[STPTR1]], align 4
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i64 [[IV_NEXT]], 5
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:


  ; base instruction
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]

  ; loop-increment
  %iv.next = add nuw nsw i64 %iv, 1

  ; unrerollable instructions using %iv.next
  %stptrx = getelementptr inbounds [2 x i32], ptr %a, i64 %iv.next, i64 0
  store i32 999, ptr %stptrx, align 4

  ; extra simple arithmetic operations, used by root instructions
  %plus20 = add nuw nsw i64 %iv, 20
  %plus10 = add nuw nsw i64 %iv, 10

  ; root instruction 0
  %ldptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 0
  %value0 = load i32, ptr %ldptr0, align 4
  %stptr0 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 0
  store i32 %value0, ptr %stptr0, align 4

  ; root instruction 1
  %ldptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus20, i64 1
  %value1 = load i32, ptr %ldptr1, align 4
  %stptr1 = getelementptr inbounds [2 x i32], ptr %a, i64 %plus10, i64 1
  store i32 %value1, ptr %stptr1, align 4

  ; latch
  %exitcond = icmp eq i64 %iv.next, 5
  br i1 %exitcond, label %exit, label %loop

exit:
  ret void
}

define dso_local void @rerollable2() {
; CHECK-LABEL: define dso_local void @rerollable2() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[TMP0:%.*]] = add i32 [[IV]], 24
; CHECK-NEXT:    [[TMP1:%.*]] = add i32 [[IV]], 20
; CHECK-NEXT:    [[IV_SCALED_DIV5:%.*]] = udiv i32 [[TMP1]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD4_DIV5:%.*]] = udiv i32 [[TMP0]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD4_DIV5]])
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[IV]], 8
; CHECK-NEXT:    br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:


  ; induction variable
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]

  ; scale instruction
  %iv.mul3 = mul nuw nsw i32 %iv, 3

  ; extra simple arithmetic operations, used by root instructions
  %iv.scaled = add nuw nsw i32 %iv.mul3, 20

  ; NO unrerollable instructions

  ; root set 1

  ; base instruction
  %iv.scaled.div5 = udiv i32 %iv.scaled, 5
  tail call void @bar(i32 %iv.scaled.div5)
  ; root instruction 0
  %iv.scaled.add1 = add nuw nsw i32 %iv.scaled, 1
  %iv.scaled.add1.div5 = udiv i32 %iv.scaled.add1, 5
  tail call void @bar(i32 %iv.scaled.add1.div5)
  ; root instruction 2
  %iv.scaled.add2 = add nuw nsw i32 %iv.scaled, 2
  %iv.scaled.add2.div5 = udiv i32 %iv.scaled.add2, 5
  tail call void @bar(i32 %iv.scaled.add2.div5)

  ; root set 2

  ; base instruction
  %iv.scaled.add4 = add nuw nsw i32 %iv.scaled, 4
  %iv.scaled.add4.div5 = udiv i32 %iv.scaled.add4, 5
  tail call void @bar(i32 %iv.scaled.add4.div5)
  ; root instruction 0
  %iv.scaled.add5 = add nuw nsw i32 %iv.scaled, 5
  %iv.scaled.add5.div5 = udiv i32 %iv.scaled.add5, 5
  tail call void @bar(i32 %iv.scaled.add5.div5)
  ; root instruction 2
  %iv.scaled.add6 = add nuw nsw i32 %iv.scaled, 6
  %iv.scaled.add6.div5 = udiv i32 %iv.scaled.add6, 5
  tail call void @bar(i32 %iv.scaled.add6.div5)

  ; loop-increment
  %iv.next = add nuw nsw i32 %iv, 1

  ; latch
  %cmp = icmp ult i32 %iv.next, 3
  br i1 %cmp, label %loop, label %exit

exit:
  ret void
}

define dso_local void @unrerollable3() {
; CHECK-LABEL: define dso_local void @unrerollable3() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[LOOP:%.*]]
; CHECK:       loop:
; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT:    [[IV_MUL3:%.*]] = mul nuw nsw i32 [[IV]], 3
; CHECK-NEXT:    [[IV_SCALED:%.*]] = add nuw nsw i32 [[IV_MUL3]], 20
; CHECK-NEXT:    [[IV_MUL7:%.*]] = mul nuw nsw i32 [[IV]], 7
; CHECK-NEXT:    tail call void @bar(i32 [[IV_MUL7]])
; CHECK-NEXT:    [[IV_SCALED_DIV5:%.*]] = udiv i32 [[IV_SCALED]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD1:%.*]] = add nuw nsw i32 [[IV_SCALED]], 1
; CHECK-NEXT:    [[IV_SCALED_ADD1_DIV5:%.*]] = udiv i32 [[IV_SCALED_ADD1]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD1_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD2:%.*]] = add nuw nsw i32 [[IV_SCALED]], 2
; CHECK-NEXT:    [[IV_SCALED_ADD2_DIV5:%.*]] = udiv i32 [[IV_SCALED_ADD2]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD2_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD4:%.*]] = add nuw nsw i32 [[IV_SCALED]], 4
; CHECK-NEXT:    [[IV_SCALED_ADD4_DIV5:%.*]] = udiv i32 [[IV_SCALED_ADD4]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD4_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD5:%.*]] = add nuw nsw i32 [[IV_SCALED]], 5
; CHECK-NEXT:    [[IV_SCALED_ADD5_DIV5:%.*]] = udiv i32 [[IV_SCALED_ADD5]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD5_DIV5]])
; CHECK-NEXT:    [[IV_SCALED_ADD6:%.*]] = add nuw nsw i32 [[IV_SCALED]], 6
; CHECK-NEXT:    [[IV_SCALED_ADD6_DIV5:%.*]] = udiv i32 [[IV_SCALED_ADD6]], 5
; CHECK-NEXT:    tail call void @bar(i32 [[IV_SCALED_ADD6_DIV5]])
; CHECK-NEXT:    [[IV_NEXT]] = add nuw nsw i32 [[IV]], 1
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[IV_NEXT]], 3
; CHECK-NEXT:    br i1 [[CMP]], label [[LOOP]], label [[EXIT:%.*]]
; CHECK:       exit:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:


  ; induction variable
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]

  ; scale instruction
  %iv.mul3 = mul nuw nsw i32 %iv, 3

  ; extra simple arithmetic operations, used by root instructions
  %iv.scaled = add nuw nsw i32 %iv.mul3, 20

  ; unrerollable instructions using %iv
  %iv.mul7 = mul nuw nsw i32 %iv, 7
  tail call void @bar(i32 %iv.mul7)

  ; root set 1

  ; base instruction
  %iv.scaled.div5 = udiv i32 %iv.scaled, 5
  tail call void @bar(i32 %iv.scaled.div5)
  ; root instruction 0
  %iv.scaled.add1 = add nuw nsw i32 %iv.scaled, 1
  %iv.scaled.add1.div5 = udiv i32 %iv.scaled.add1, 5
  tail call void @bar(i32 %iv.scaled.add1.div5)
  ; root instruction 2
  %iv.scaled.add2 = add nuw nsw i32 %iv.scaled, 2
  %iv.scaled.add2.div5 = udiv i32 %iv.scaled.add2, 5
  tail call void @bar(i32 %iv.scaled.add2.div5)

  ; root set 2

  ; base instruction
  %iv.scaled.add4 = add nuw nsw i32 %iv.scaled, 4
  %iv.scaled.add4.div5 = udiv i32 %iv.scaled.add4, 5
  tail call void @bar(i32 %iv.scaled.add4.div5)
  ; root instruction 0
  %iv.scaled.add5 = add nuw nsw i32 %iv.scaled, 5
  %iv.scaled.add5.div5 = udiv i32 %iv.scaled.add5, 5
  tail call void @bar(i32 %iv.scaled.add5.div5)
  ; root instruction 2
  %iv.scaled.add6 = add nuw nsw i32 %iv.scaled, 6
  %iv.scaled.add6.div5 = udiv i32 %iv.scaled.add6, 5
  tail call void @bar(i32 %iv.scaled.add6.div5)

  ; loop-increment
  %iv.next = add nuw nsw i32 %iv, 1

  ; latch
  %cmp = icmp ult i32 %iv.next, 3
  br i1 %cmp, label %loop, label %exit

exit:
  ret void
}

declare dso_local void @bar(i32)