1 ; RUN: opt < %s -reassociate -S | FileCheck %s 2 3 define float @test1(float %A) { 4 ; CHECK-LABEL: @test1( 5 ; CHECK-NEXT: [[X:%.*]] = fadd float %A, 1.000000e+00 6 ; CHECK-NEXT: [[Y:%.*]] = fadd float %A, 1.000000e+00 7 ; CHECK-NEXT: [[R:%.*]] = fsub float [[X]], [[Y]] 8 ; CHECK-NEXT: ret float [[R]] 9 ; 10 %X = fadd float %A, 1.000000e+00 11 %Y = fadd float %A, 1.000000e+00 12 %r = fsub float %X, %Y 13 ret float %r 14 } 15 16 define float @test2(float %A) { 17 ; CHECK-LABEL: @test2( 18 ; CHECK-NEXT: ret float 0.000000e+00 19 ; 20 %X = fadd fast float 1.000000e+00, %A 21 %Y = fadd fast float 1.000000e+00, %A 22 %r = fsub fast float %X, %Y 23 ret float %r 24 } 25 26 ; Check again using minimal subset of FMF. 27 28 define float @test2_reassoc(float %A) { 29 ; CHECK-LABEL: @test2_reassoc( 30 ; CHECK-NEXT: [[X:%.*]] = fadd reassoc float %A, 1.000000e+00 31 ; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float %A, 1.000000e+00 32 ; CHECK-NEXT: [[R:%.*]] = fsub reassoc float [[X]], [[Y]] 33 ; CHECK-NEXT: ret float [[R]] 34 ; 35 %X = fadd reassoc float 1.000000e+00, %A 36 %Y = fadd reassoc float 1.000000e+00, %A 37 %r = fsub reassoc float %X, %Y 38 ret float %r 39 } 40 41
