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[InstSimplify] Use commutable matchers to simplify some code. NFC 

llvm-svn: 308125
This commit is contained in:
Craig Topper 2017-07-16 06:57:41 +00:00
parent 2072aca51c
commit dad7d8dfb0
1 changed files with 7 additions and 14 deletions
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21
llvm/lib/Analysis/InstructionSimplify.cpp
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@ -1745,14 +1745,11 @@ static Value *SimplifyAndInst(Value *Op0, Value *Op1, const SimplifyQuery &Q,
return Constant::getNullValue(Op0->getType()); return Constant::getNullValue(Op0->getType());
// (A | ?) & A = A // (A | ?) & A = A
Value *A = nullptr, *B = nullptr; if (match(Op0, m_c_Or(m_Specific(Op1), m_Value())))
if (match(Op0, m_Or(m_Value(A), m_Value(B))) &&
(A == Op1 || B == Op1))
return Op1; return Op1;
// A & (A | ?) = A // A & (A | ?) = A
if (match(Op1, m_Or(m_Value(A), m_Value(B))) && if (match(Op1, m_c_Or(m_Specific(Op0), m_Value())))
(A == Op0 || B == Op0))
return Op0; return Op0;
// A mask that only clears known zeros of a shifted value is a no-op. // A mask that only clears known zeros of a shifted value is a no-op.
@ -1852,26 +1849,22 @@ static Value *SimplifyOrInst(Value *Op0, Value *Op1, const SimplifyQuery &Q,
return Constant::getAllOnesValue(Op0->getType()); return Constant::getAllOnesValue(Op0->getType());
// (A & ?) | A = A // (A & ?) | A = A
Value *A = nullptr, *B = nullptr; if (match(Op0, m_c_And(m_Specific(Op1), m_Value())))
if (match(Op0, m_And(m_Value(A), m_Value(B))) &&
(A == Op1 || B == Op1))
return Op1; return Op1;
// A | (A & ?) = A // A | (A & ?) = A
if (match(Op1, m_And(m_Value(A), m_Value(B))) && if (match(Op1, m_c_And(m_Specific(Op0), m_Value())))
(A == Op0 || B == Op0))
return Op0; return Op0;
// ~(A & ?) | A = -1 // ~(A & ?) | A = -1
if (match(Op0, m_Not(m_And(m_Value(A), m_Value(B)))) && if (match(Op0, m_Not(m_c_And(m_Specific(Op1), m_Value()))))
(A == Op1 || B == Op1))
return Constant::getAllOnesValue(Op1->getType()); return Constant::getAllOnesValue(Op1->getType());
// A | ~(A & ?) = -1 // A | ~(A & ?) = -1
if (match(Op1, m_Not(m_And(m_Value(A), m_Value(B)))) && if (match(Op1, m_Not(m_c_And(m_Specific(Op1), m_Value()))))
(A == Op0 || B == Op0))
return Constant::getAllOnesValue(Op0->getType()); return Constant::getAllOnesValue(Op0->getType());
Value *A, *B;
// (A & ~B) | (A ^ B) -> (A ^ B) // (A & ~B) | (A ^ B) -> (A ^ B)
// (~B & A) | (A ^ B) -> (A ^ B) // (~B & A) | (A ^ B) -> (A ^ B)
// (A & ~B) | (B ^ A) -> (B ^ A) // (A & ~B) | (B ^ A) -> (B ^ A)