1; RUN: opt < %s -instsimplify -S | FileCheck %s 2 3; fsub 0, (fsub 0, X) ==> X 4; CHECK-LABEL: @fsub_0_0_x( 5define float @fsub_0_0_x(float %a) { 6 %t1 = fsub float -0.0, %a 7 %ret = fsub float -0.0, %t1 8 9; CHECK: ret float %a 10 ret float %ret 11} 12 13; fsub X, 0 ==> X 14; CHECK-LABEL: @fsub_x_0( 15define float @fsub_x_0(float %a) { 16 %ret = fsub float %a, 0.0 17; CHECK: ret float %a 18 ret float %ret 19} 20 21; fadd X, -0 ==> X 22; CHECK-LABEL: @fadd_x_n0( 23define float @fadd_x_n0(float %a) { 24 %ret = fadd float %a, -0.0 25; CHECK: ret float %a 26 ret float %ret 27} 28 29; fmul X, 1.0 ==> X 30; CHECK-LABEL: @fmul_X_1( 31define double @fmul_X_1(double %a) { 32 %b = fmul double 1.000000e+00, %a ; <double> [#uses=1] 33 ; CHECK: ret double %a 34 ret double %b 35} 36