test/Transforms/Reassociate/fast-AgressiveSubMove.ll


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; RUN: opt < %s -reassociate -S | FileCheck %s

define float @test1(float %A) {
; CHECK-LABEL: test1
; CHECK-NEXT: %X = fadd float %A, 1.000000e+00
; CHECK-NEXT: %Y = fadd float %A, 1.000000e+00
; CHECK-NEXT: %r = fsub float %X, %Y
; CHECK-NEXT: ret float %r

  %X = fadd float %A, 1.000000e+00
  %Y = fadd float %A, 1.000000e+00
  %r = fsub float %X, %Y
  ret float %r
}

define float @test2(float %A) {
; CHECK-LABEL: test2
; CHECK-NEXT: ret float 0.000000e+00

  %X = fadd fast float 1.000000e+00, %A
  %Y = fadd fast float 1.000000e+00, %A
  %r = fsub fast float %X, %Y
  ret float %r
}