1 ; RUN: opt < %s -instsimplify -S | FileCheck %s 2 3 ; fsub 0, (fsub 0, X) ==> X 4 ; CHECK-LABEL: @fsub_0_0_x( 5 define 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( 15 define 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( 23 define 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( 31 define 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
