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[InstCombine] Extend a canonicalization check to apply to vector constants too.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@299821 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2017-04-09 06:12:39 +00:00
parent 35b55965c4
commit c5f68270ad
2 changed files with 6 additions and 5 deletions
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3
lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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@ -2567,8 +2567,9 @@ Instruction *InstCombiner::visitXor(BinaryOperator &I) {
Op0I->hasOneUse()){
if (A == Op1) // (A&B)^A -> (B&A)^A
std::swap(A, B);
const APInt *C;
if (B == Op1 && // (B&A)^A == ~B & A
!isa<ConstantInt>(Op1)) { // Canonical form is (B&C)^C
!match(Op1, m_APInt(C))) { // Canonical form is (B&C)^C
return BinaryOperator::CreateAnd(Builder->CreateNot(A), Op1);
}
}

8
test/Transforms/InstCombine/and.ll
View File

@ -431,8 +431,8 @@ define i32 @test33b(i32 %b) {
define <2 x i32> @test33vec(<2 x i32> %b) {
; CHECK-LABEL: @test33vec(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_10:%.*]] = and <2 x i32> [[TMP1]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_4_MASK:%.*]] = and <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_10:%.*]] = xor <2 x i32> [[TMP_4_MASK]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_12:%.*]] = and <2 x i32> [[B]], <i32 -2, i32 -2>
; CHECK-NEXT: [[TMP_13:%.*]] = or <2 x i32> [[TMP_12]], [[TMP_10]]
; CHECK-NEXT: ret <2 x i32> [[TMP_13]]
@ -446,8 +446,8 @@ define <2 x i32> @test33vec(<2 x i32> %b) {
define <2 x i32> @test33vecb(<2 x i32> %b) {
; CHECK-LABEL: @test33vecb(
; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_10:%.*]] = and <2 x i32> [[TMP1]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_4_MASK:%.*]] = and <2 x i32> [[B:%.*]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_10:%.*]] = xor <2 x i32> [[TMP_4_MASK]], <i32 1, i32 1>
; CHECK-NEXT: [[TMP_12:%.*]] = and <2 x i32> [[B]], <i32 -2, i32 -2>
; CHECK-NEXT: [[TMP_13:%.*]] = or <2 x i32> [[TMP_10]], [[TMP_12]]
; CHECK-NEXT: ret <2 x i32> [[TMP_13]]