File: commute.ll

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llvm-toolchain-19 1%3A19.1.7-3~deb12u1
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=reassociate -S < %s | FileCheck %s

declare void @use(i32)

define void @test1(i32 %x, i32 %y) {
; CHECK-LABEL: @test1(
; CHECK-NEXT:    [[TMP1:%.*]] = mul i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT:    [[TMP2:%.*]] = mul i32 [[Y]], [[X]]
; CHECK-NEXT:    [[TMP3:%.*]] = sub i32 [[TMP1]], [[TMP2]]
; CHECK-NEXT:    call void @use(i32 [[TMP1]])
; CHECK-NEXT:    call void @use(i32 [[TMP3]])
; CHECK-NEXT:    ret void
;

  %1 = mul i32 %x, %y
  %2 = mul i32 %y, %x
  %3 = sub i32 %1, %2
  call void @use(i32 %1)
  call void @use(i32 %3)
  ret void
}