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; RUN: opt < %s -passes=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
}
; Check again using minimal subset of FMF.
define float @test2_reassoc(float %A) {
; CHECK-LABEL: @test2_reassoc(
; CHECK-NEXT: [[X:%.*]] = fadd reassoc float %A, 1.000000e+00
; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float %A, 1.000000e+00
; CHECK-NEXT: [[R:%.*]] = fsub reassoc float [[X]], [[Y]]
; CHECK-NEXT: ret float [[R]]
;
%X = fadd reassoc float 1.000000e+00, %A
%Y = fadd reassoc float 1.000000e+00, %A
%r = fsub reassoc float %X, %Y
ret float %r
}
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