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Use APInt operation instead of ConstantExpr::getXX. 

llvm-svn: 35503
This commit is contained in:
Zhou Sheng 2007-03-30 05:45:18 +00:00
parent 9737575772
commit 5e60a4a6b0
1 changed files with 6 additions and 6 deletions
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12
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
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@ -5658,9 +5658,9 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1,
BinaryOperator::create(Op0BO->getOpcode(), YS, V1,
Op0BO->getOperand(1)->getName());
InsertNewInstBefore(X, I); // (X + (Y << C))
Constant *C2 = ConstantInt::getAllOnesValue(X->getType());
C2 = ConstantExpr::getShl(C2, Op1);
return BinaryOperator::createAnd(X, C2);
uint32_t Op1Val = Op1->getZExtValue();
return BinaryOperator::createAnd(X, ConstantInt::get(
APInt::getHighBitsSet(TypeBits, TypeBits-Op1Val)));
}
// Turn (Y + ((X >> C) & CC)) << C -> ((X & (CC << C)) + (Y << C))
@ -5697,9 +5697,9 @@ Instruction *InstCombiner::FoldShiftByConstant(Value *Op0, ConstantInt *Op1,
BinaryOperator::create(Op0BO->getOpcode(), V1, YS,
Op0BO->getOperand(0)->getName());
InsertNewInstBefore(X, I); // (X + (Y << C))
Constant *C2 = ConstantInt::getAllOnesValue(X->getType());
C2 = ConstantExpr::getShl(C2, Op1);
return BinaryOperator::createAnd(X, C2);
uint32_t Op1Val = Op1->getZExtValue();
return BinaryOperator::createAnd(X, ConstantInt::get(
APInt::getHighBitsSet(TypeBits, TypeBits-Op1Val)));
}
// Turn (((X >> C)&CC) + Y) << C -> (X + (Y << C)) & (CC << C)