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don't turn (A & (C0?-1:0)) | (B & ~(C0?-1:0)) -> C0 ? A : B
for vectors. Codegen is generating awful code or segfaulting in various cases (e.g. PR6204). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95058 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1591,15 +1591,19 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
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}
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}
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// (A & (C0?-1:0)) | (B & ~(C0?-1:0)) -> C0 ? A : B, and commuted variants
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if (Instruction *Match = MatchSelectFromAndOr(A, B, C, D))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(B, A, D, C))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(C, B, A, D))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(D, A, B, C))
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return Match;
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// (A & (C0?-1:0)) | (B & ~(C0?-1:0)) -> C0 ? A : B, and commuted variants.
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// Don't do this for vector select idioms, the code generator doesn't handle
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// them well yet.
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if (!isa<VectorType>(I.getType())) {
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if (Instruction *Match = MatchSelectFromAndOr(A, B, C, D))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(B, A, D, C))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(C, B, A, D))
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return Match;
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if (Instruction *Match = MatchSelectFromAndOr(D, A, B, C))
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return Match;
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}
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// ((A&~B)|(~A&B)) -> A^B
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if ((match(C, m_Not(m_Specific(D))) &&
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@ -336,3 +336,17 @@ define i64 @test31(i64 %A) nounwind readnone ssp noredzone {
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; CHECK-NEXT: %F = and i64 %bitfield, 4294941946
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; CHECK-NEXT: ret i64 %F
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}
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define <4 x i32> @test32(<4 x i1> %and.i1352, <4 x i32> %vecinit6.i176, <4 x i32> %vecinit6.i191) {
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%and.i135 = sext <4 x i1> %and.i1352 to <4 x i32> ; <<4 x i32>> [#uses=2]
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%and.i129 = and <4 x i32> %vecinit6.i176, %and.i135 ; <<4 x i32>> [#uses=1]
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%neg.i = xor <4 x i32> %and.i135, <i32 -1, i32 -1, i32 -1, i32 -1> ; <<4 x i32>> [#uses=1]
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%and.i = and <4 x i32> %vecinit6.i191, %neg.i ; <<4 x i32>> [#uses=1]
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%or.i = or <4 x i32> %and.i, %and.i129 ; <<4 x i32>> [#uses=1]
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ret <4 x i32> %or.i
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; Don't turn this into a vector select until codegen matures to handle them
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; better.
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; CHECK: @test32
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; CHECK: or <4 x i32> %and.i, %and.i129
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}
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