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Move "A | ~(A & ?) -> -1" from InstCombine to InstructionSimplify.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126082 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2011-02-20 15:20:01 +00:00
parent 91e37ef278
commit 38f7f66fcc
2 changed files with 18 additions and 16 deletions
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lib/Analysis/InstructionSimplify.cpp
+10
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@@ -1161,6 +1161,16 @@ static Value *SimplifyOrInst(Value *Op0, Value *Op1, const TargetData *TD,
(A == Op0 || B == Op0))
return Op0;
// ~(A & ?) | A = -1
if (match(Op0, m_Not(m_And(m_Value(A), m_Value(B)))) &&
(A == Op1 || B == Op1))
return Constant::getAllOnesValue(Op1->getType());
// A | ~(A & ?) = -1
if (match(Op1, m_Not(m_And(m_Value(A), m_Value(B)))) &&
(A == Op0 || B == Op0))
return Constant::getAllOnesValue(Op0->getType());
// Try some generic simplifications for associative operations.
if (Value *V = SimplifyAssociativeBinOp(Instruction::Or, Op0, Op1, TD, DT,
MaxRecurse))