forked from OSchip/llvm-project
137 lines
4.7 KiB
LLVM
137 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; 'Negate' is considered less complex than a normal binop, so the xor should have the binop as the first operand.
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define i8 @neg(i8 %x) {
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; CHECK-LABEL: @neg(
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; CHECK-NEXT: [[BO:%.*]] = udiv i8 [[X:%.*]], 42
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; CHECK-NEXT: [[NEGX:%.*]] = sub i8 0, [[X]]
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; CHECK-NEXT: [[R:%.*]] = xor i8 [[BO]], [[NEGX]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%bo = udiv i8 %x, 42
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%negx = sub i8 0, %x
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%r = xor i8 %negx, %bo
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ret i8 %r
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}
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define <2 x i8> @neg_vec(<2 x i8> %x) {
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; CHECK-LABEL: @neg_vec(
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; CHECK-NEXT: [[BO:%.*]] = udiv <2 x i8> [[X:%.*]], <i8 42, i8 -42>
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; CHECK-NEXT: [[NEGX:%.*]] = sub <2 x i8> zeroinitializer, [[X]]
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; CHECK-NEXT: [[R:%.*]] = xor <2 x i8> [[BO]], [[NEGX]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%bo = udiv <2 x i8> %x, <i8 42, i8 -42>
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%negx = sub <2 x i8> <i8 0, i8 0>, %x
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%r = xor <2 x i8> %negx, %bo
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ret <2 x i8> %r
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}
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define <2 x i8> @neg_vec_undef(<2 x i8> %x) {
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; CHECK-LABEL: @neg_vec_undef(
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; CHECK-NEXT: [[BO:%.*]] = udiv <2 x i8> [[X:%.*]], <i8 42, i8 -42>
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; CHECK-NEXT: [[NEGX:%.*]] = sub <2 x i8> <i8 0, i8 undef>, [[X]]
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; CHECK-NEXT: [[R:%.*]] = xor <2 x i8> [[BO]], [[NEGX]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%bo = udiv <2 x i8> %x, <i8 42, i8 -42>
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%negx = sub <2 x i8> <i8 0, i8 undef>, %x
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%r = xor <2 x i8> %negx, %bo
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ret <2 x i8> %r
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}
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; 'Not' is considered less complex than a normal binop, so the mul should have the binop as the first operand.
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define i8 @not(i8 %x) {
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; CHECK-LABEL: @not(
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; CHECK-NEXT: [[BO:%.*]] = udiv i8 [[X:%.*]], 42
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; CHECK-NEXT: [[NOTX:%.*]] = xor i8 [[X]], -1
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; CHECK-NEXT: [[R:%.*]] = mul i8 [[BO]], [[NOTX]]
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; CHECK-NEXT: ret i8 [[R]]
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;
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%bo = udiv i8 %x, 42
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%notx = xor i8 -1, %x
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%r = mul i8 %notx, %bo
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ret i8 %r
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}
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define <2 x i8> @not_vec(<2 x i8> %x) {
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; CHECK-LABEL: @not_vec(
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; CHECK-NEXT: [[BO:%.*]] = udiv <2 x i8> [[X:%.*]], <i8 42, i8 -42>
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; CHECK-NEXT: [[NOTX:%.*]] = xor <2 x i8> [[X]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[R:%.*]] = mul <2 x i8> [[BO]], [[NOTX]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%bo = udiv <2 x i8> %x, <i8 42, i8 -42>
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%notx = xor <2 x i8> <i8 -1, i8 -1>, %x
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%r = mul <2 x i8> %notx, %bo
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ret <2 x i8> %r
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}
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define <2 x i8> @not_vec_undef(<2 x i8> %x) {
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; CHECK-LABEL: @not_vec_undef(
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; CHECK-NEXT: [[BO:%.*]] = udiv <2 x i8> [[X:%.*]], <i8 42, i8 -42>
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; CHECK-NEXT: [[NOTX:%.*]] = xor <2 x i8> [[X]], <i8 -1, i8 undef>
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; CHECK-NEXT: [[R:%.*]] = mul <2 x i8> [[BO]], [[NOTX]]
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; CHECK-NEXT: ret <2 x i8> [[R]]
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;
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%bo = udiv <2 x i8> %x, <i8 42, i8 -42>
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%notx = xor <2 x i8> <i8 -1, i8 undef>, %x
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%r = mul <2 x i8> %notx, %bo
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ret <2 x i8> %r
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}
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; 'Fneg' is considered less complex than a normal binop, so the fmul should have the binop as the first operand.
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; Extra uses are required to ensure that the fneg is not canonicalized after the fmul.
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declare void @use(float)
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declare void @use_vec(<2 x float>)
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define float @fneg(float %x) {
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; CHECK-LABEL: @fneg(
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; CHECK-NEXT: [[BO:%.*]] = fdiv float [[X:%.*]], 4.200000e+01
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; CHECK-NEXT: [[FNEGX:%.*]] = fsub float -0.000000e+00, [[X]]
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; CHECK-NEXT: [[R:%.*]] = fmul float [[BO]], [[FNEGX]]
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; CHECK-NEXT: call void @use(float [[FNEGX]])
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; CHECK-NEXT: ret float [[R]]
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;
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%bo = fdiv float %x, 42.0
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%fnegx = fsub float -0.0, %x
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%r = fmul float %fnegx, %bo
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call void @use(float %fnegx)
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ret float %r
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}
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define <2 x float> @fneg_vec(<2 x float> %x) {
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; CHECK-LABEL: @fneg_vec(
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; CHECK-NEXT: [[BO:%.*]] = fdiv <2 x float> [[X:%.*]], <float 4.200000e+01, float -4.200000e+01>
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; CHECK-NEXT: [[FNEGX:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X]]
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; CHECK-NEXT: [[R:%.*]] = fmul <2 x float> [[BO]], [[FNEGX]]
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; CHECK-NEXT: call void @use_vec(<2 x float> [[FNEGX]])
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; CHECK-NEXT: ret <2 x float> [[R]]
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;
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%bo = fdiv <2 x float> %x, <float 42.0, float -42.0>
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%fnegx = fsub <2 x float> <float -0.0, float -0.0>, %x
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%r = fmul <2 x float> %fnegx, %bo
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call void @use_vec(<2 x float> %fnegx)
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ret <2 x float> %r
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}
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define <2 x float> @fneg_vec_undef(<2 x float> %x) {
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; CHECK-LABEL: @fneg_vec_undef(
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; CHECK-NEXT: [[BO:%.*]] = fdiv <2 x float> [[X:%.*]], <float 4.200000e+01, float -4.200000e+01>
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; CHECK-NEXT: [[FNEGX:%.*]] = fsub <2 x float> <float -0.000000e+00, float undef>, [[X]]
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; CHECK-NEXT: [[R:%.*]] = fmul <2 x float> [[BO]], [[FNEGX]]
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; CHECK-NEXT: call void @use_vec(<2 x float> [[FNEGX]])
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; CHECK-NEXT: ret <2 x float> [[R]]
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;
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%bo = fdiv <2 x float> %x, <float 42.0, float -42.0>
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%fnegx = fsub <2 x float> <float -0.0, float undef>, %x
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%r = fmul <2 x float> %fnegx, %bo
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call void @use_vec(<2 x float> %fnegx)
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ret <2 x float> %r
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}
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