forked from OSchip/llvm-project
36 lines
715 B
LLVM
36 lines
715 B
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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; fsub 0, (fsub 0, X) ==> X
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; CHECK: @fsub_0_0_x
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define float @fsub_0_0_x(float %a) {
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%t1 = fsub float -0.0, %a
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%ret = fsub float -0.0, %t1
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; CHECK: ret float %a
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ret float %ret
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}
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; fsub X, 0 ==> X
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; CHECK: @fsub_x_0
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define float @fsub_x_0(float %a) {
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%ret = fsub float %a, 0.0
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; CHECK: ret float %a
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ret float %ret
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}
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; fadd X, -0 ==> X
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; CHECK: @fadd_x_n0
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define float @fadd_x_n0(float %a) {
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%ret = fadd float %a, -0.0
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; CHECK: ret float %a
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ret float %ret
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}
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; fmul X, 1.0 ==> X
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; CHECK: @fmul_X_1
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define double @fmul_X_1(double %a) {
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%b = fmul double 1.000000e+00, %a ; <double> [#uses=1]
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; CHECK: ret double %a
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ret double %b
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}
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