Mercurial > hg > CbC > CbC_llvm
view test/Transforms/InstCombine/sub-xor.ll @ 147:c2174574ed3a
LLVM 10
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Wed, 14 Aug 2019 16:55:33 +0900 |
parents | 803732b1fca8 |
children |
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py ; RUN: opt -instcombine -S < %s | FileCheck %s define i32 @test1(i32 %x) { ; CHECK-LABEL: @test1( ; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31 ; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[AND]], 63 ; CHECK-NEXT: ret i32 [[SUB]] ; %and = and i32 %x, 31 %sub = sub i32 63, %and ret i32 %sub } define <2 x i32> @test1vec(<2 x i32> %x) { ; CHECK-LABEL: @test1vec( ; CHECK-NEXT: [[AND:%.*]] = and <2 x i32> %x, <i32 31, i32 31> ; CHECK-NEXT: [[SUB:%.*]] = xor <2 x i32> [[AND]], <i32 63, i32 63> ; CHECK-NEXT: ret <2 x i32> [[SUB]] ; %and = and <2 x i32> %x, <i32 31, i32 31> %sub = sub <2 x i32> <i32 63, i32 63>, %and ret <2 x i32> %sub } declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone define i32 @test2(i32 %x) nounwind { ; CHECK-LABEL: @test2( ; CHECK-NEXT: [[COUNT:%.*]] = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) ; CHECK-NEXT: [[SUB:%.*]] = xor i32 [[COUNT]], 31 ; CHECK-NEXT: ret i32 [[SUB]] ; %count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone %sub = sub i32 31, %count ret i32 %sub } define i32 @test3(i32 %x) { ; CHECK-LABEL: @test3( ; CHECK-NEXT: [[AND:%.*]] = and i32 %x, 31 ; CHECK-NEXT: [[ADD:%.*]] = sub nuw nsw i32 73, [[AND]] ; CHECK-NEXT: ret i32 [[ADD]] ; %and = and i32 %x, 31 %sub = xor i32 31, %and %add = add i32 %sub, 42 ret i32 %add }