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61 lines
1.6 KiB
LLVM
61 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -instcombine -S < %s | FileCheck %s
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define i32 @test1(i32 %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
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; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[AND]], 63
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; CHECK-NEXT: ret i32 [[SUB]]
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;
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%and = and i32 %x, 31
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%sub = sub i32 63, %and
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ret i32 %sub
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}
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define <2 x i32> @test1vec(<2 x i32> %x) {
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; CHECK-LABEL: @test1vec(
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; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> %x, <i32 31, i32 31>
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; CHECK-NEXT: [[SUB:%.*]] = xor <2 x i32> [[AND]], <i32 63, i32 63>
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; CHECK-NEXT: ret <2 x i32> [[SUB]]
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;
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%and = and <2 x i32> %x, <i32 31, i32 31>
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%sub = sub <2 x i32> <i32 63, i32 63>, %and
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ret <2 x i32> %sub
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}
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declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
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define i32 @test2(i32 %x) nounwind {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[COUNT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) #0
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; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[COUNT]], 31
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; CHECK-NEXT: ret i32 [[SUB]]
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;
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%count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone
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%sub = sub i32 31, %count
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ret i32 %sub
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}
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define i32 @test3(i32 %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31
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; CHECK-NEXT: [[ADD:%.*]] = sub nsw i32 73, [[AND]]
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; CHECK-NEXT: ret i32 [[ADD]]
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;
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%and = and i32 %x, 31
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%sub = xor i32 31, %and
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%add = add i32 %sub, 42
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ret i32 %add
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}
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define i32 @test4(i32 %x) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: [[ADD:%.*]] = add i32 %x, -2147483606
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; CHECK-NEXT: ret i32 [[ADD]]
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;
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%sub = xor i32 %x, 2147483648
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%add = add i32 %sub, 42
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ret i32 %add
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}
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