[InstCombine] Support folding and/or/xor with a constant vector RHS into selects and phis
Currently we only fold with ConstantInt RHS. This generalizes to any Constant RHS.
Differential Revision: https://reviews.llvm.org/D31610
llvm-svn: 299466
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index 5f16284..41395c6 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -1403,10 +1403,11 @@
return BinaryOperator::CreateAnd(NewCast, C3);
}
}
+ }
+ if (isa<Constant>(Op1))
if (Instruction *FoldedLogic = foldOpWithConstantIntoOperand(I))
return FoldedLogic;
- }
if (Instruction *DeMorgan = matchDeMorgansLaws(I, Builder))
return DeMorgan;
@@ -2130,10 +2131,11 @@
return BinaryOperator::CreateXor(Or,
Builder->getInt(C1->getValue() & ~RHS->getValue()));
}
+ }
+ if (isa<Constant>(Op1))
if (Instruction *FoldedLogic = foldOpWithConstantIntoOperand(I))
return FoldedLogic;
- }
// Given an OR instruction, check to see if this is a bswap.
if (Instruction *BSwap = MatchBSwap(I))
@@ -2593,10 +2595,11 @@
}
}
}
+ }
+ if (isa<Constant>(Op1))
if (Instruction *FoldedLogic = foldOpWithConstantIntoOperand(I))
return FoldedLogic;
- }
BinaryOperator *Op1I = dyn_cast<BinaryOperator>(Op1);
if (Op1I) {