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llvm/test/Transforms/InstCombine/select-of-symmetric-selects.ll
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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py | ||
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s | ||
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| define i32 @select_of_symmetric_selects(i32 %a, i32 %b, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], i32 [[A:%.*]], i32 [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C1]], i32 [[B]], i32 [[A]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], i32 [[SEL1]], i32 [[SEL2]] | ||
| ; CHECK-NEXT: ret i32 [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, i32 %a, i32 %b | ||
| %sel2 = select i1 %c1, i32 %b, i32 %a | ||
| %ret = select i1 %c2, i32 %sel1, i32 %sel2 | ||
| ret i32 %ret | ||
| } | ||
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| define i32 @select_of_symmetric_selects_negative1(i32 %a, i32 %b, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_negative1( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], i32 [[A:%.*]], i32 [[B:%.*]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], i32 [[SEL1]], i32 [[A]] | ||
| ; CHECK-NEXT: ret i32 [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, i32 %a, i32 %b | ||
| %sel2 = select i1 %c2, i32 %b, i32 %a | ||
| %ret = select i1 %c2, i32 %sel1, i32 %sel2 | ||
| ret i32 %ret | ||
| } | ||
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| define i32 @select_of_symmetric_selects_negative2(i32 %a, i32 %b, i32 %c, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_negative2( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], i32 [[A:%.*]], i32 [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C1]], i32 [[B]], i32 [[C:%.*]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], i32 [[SEL1]], i32 [[SEL2]] | ||
| ; CHECK-NEXT: ret i32 [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, i32 %a, i32 %b | ||
| %sel2 = select i1 %c1, i32 %b, i32 %c | ||
| %ret = select i1 %c2, i32 %sel1, i32 %sel2 | ||
| ret i32 %ret | ||
| } | ||
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| declare void @use(i32) | ||
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| define i32 @select_of_symmetric_selects_multi_use(i32 %a, i32 %b, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_multi_use( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], i32 [[A:%.*]], i32 [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C1]], i32 [[B]], i32 [[A]] | ||
| ; CHECK-NEXT: call void @use(i32 [[SEL2]]) | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], i32 [[SEL1]], i32 [[SEL2]] | ||
| ; CHECK-NEXT: ret i32 [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, i32 %a, i32 %b | ||
| %sel2 = select i1 %c1, i32 %b, i32 %a | ||
| call void @use(i32 %sel2) | ||
| %ret = select i1 %c2, i32 %sel1, i32 %sel2 | ||
| ret i32 %ret | ||
| } | ||
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| define i32 @select_of_symmetric_selects_commuted(i32 %a, i32 %b, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_commuted( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], i32 [[A:%.*]], i32 [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C1]], i32 [[B]], i32 [[A]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], i32 [[SEL2]], i32 [[SEL1]] | ||
| ; CHECK-NEXT: ret i32 [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, i32 %a, i32 %b | ||
| %sel2 = select i1 %c1, i32 %b, i32 %a | ||
| %ret = select i1 %c2, i32 %sel2, i32 %sel1 | ||
| ret i32 %ret | ||
| } | ||
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| define <4 x i32> @select_of_symmetric_selects_vector1(<4 x i32> %a, <4 x i32> %b, i1 %c1, i1 %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_vector1( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select i1 [[C1:%.*]], <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select i1 [[C1]], <4 x i32> [[B]], <4 x i32> [[A]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select i1 [[C2:%.*]], <4 x i32> [[SEL2]], <4 x i32> [[SEL1]] | ||
| ; CHECK-NEXT: ret <4 x i32> [[RET]] | ||
| ; | ||
| %sel1 = select i1 %c1, <4 x i32> %a, <4 x i32> %b | ||
| %sel2 = select i1 %c1, <4 x i32> %b, <4 x i32> %a | ||
| %ret = select i1 %c2, <4 x i32> %sel2, <4 x i32> %sel1 | ||
| ret <4 x i32> %ret | ||
| } | ||
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| define <4 x i32> @select_of_symmetric_selects_vector2(<4 x i32> %a, <4 x i32> %b, <4 x i1> %c1, <4 x i1> %c2) { | ||
| ; CHECK-LABEL: @select_of_symmetric_selects_vector2( | ||
| ; CHECK-NEXT: [[SEL1:%.*]] = select <4 x i1> [[C1:%.*]], <4 x i32> [[A:%.*]], <4 x i32> [[B:%.*]] | ||
| ; CHECK-NEXT: [[SEL2:%.*]] = select <4 x i1> [[C1]], <4 x i32> [[B]], <4 x i32> [[A]] | ||
| ; CHECK-NEXT: [[RET:%.*]] = select <4 x i1> [[C2:%.*]], <4 x i32> [[SEL2]], <4 x i32> [[SEL1]] | ||
| ; CHECK-NEXT: ret <4 x i32> [[RET]] | ||
| ; | ||
| %sel1 = select <4 x i1> %c1, <4 x i32> %a, <4 x i32> %b | ||
| %sel2 = select <4 x i1> %c1, <4 x i32> %b, <4 x i32> %a | ||
| %ret = select <4 x i1> %c2, <4 x i32> %sel2, <4 x i32> %sel1 | ||
| ret <4 x i32> %ret | ||
| } |