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Add a new method for bugpoint to use

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llvm-svn: 29143
This commit is contained in:
Chris Lattner 2006-07-14 19:37:40 +00:00
parent b78b91260b
commit 10054b8603
1 changed files with 51 additions and 0 deletions
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51
lib/VMCore/Constants.cpp
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@ -497,6 +497,57 @@ Constant *ConstantExpr::getSShr(Constant *C1, Constant *C2) {
C1->getType()->getSignedVersion()), C2), C1->getType());
}
/// getWithOperandReplaced - Return a constant expression identical to this
/// one, but with the specified operand set to the specified value.
Constant *ConstantExpr::getWithOperandReplaced(unsigned OpNo,
Constant *Op) const {
assert(OpNo < getNumOperands() && "Operand num is out of range!");
assert(Op->getType() == getOperand(OpNo)->getType() &&
"Replacing operand with value of different type!");
if (getOperand(OpNo) == Op) return const_cast<ConstantExpr*>(this);
switch (getOpcode()) {
case Instruction::Cast:
return ConstantExpr::getCast(Op, getType());
case Instruction::GetElementPtr: {
std::vector<Constant*> Ops;
for (unsigned i = 1, e = getNumOperands(); i != e; ++i)
Ops.push_back(getOperand(i));
if (OpNo == 0)
return ConstantExpr::getGetElementPtr(Op, Ops);
Ops[OpNo-1] = Op;
return ConstantExpr::getGetElementPtr(getOperand(0), Ops);
}
case Instruction::Select:
if (OpNo == 0)
return ConstantExpr::getSelect(Op, getOperand(1), getOperand(2));
if (OpNo == 1)
return ConstantExpr::getSelect(getOperand(0), Op, getOperand(2));
return ConstantExpr::getSelect(getOperand(0), getOperand(1), Op);
case Instruction::InsertElement:
if (OpNo == 0)
return ConstantExpr::getInsertElement(Op, getOperand(1), getOperand(2));
if (OpNo == 1)
return ConstantExpr::getInsertElement(getOperand(0), Op, getOperand(2));
return ConstantExpr::getInsertElement(getOperand(0), getOperand(1), Op);
case Instruction::ExtractElement:
if (OpNo == 0)
return ConstantExpr::getExtractElement(Op, getOperand(1));
return ConstantExpr::getExtractElement(getOperand(0), Op);
case Instruction::ShuffleVector:
if (OpNo == 0)
return ConstantExpr::getShuffleVector(Op, getOperand(1), getOperand(2));
if (OpNo == 1)
return ConstantExpr::getShuffleVector(getOperand(0), Op, getOperand(2));
return ConstantExpr::getShuffleVector(getOperand(0), getOperand(1), Op);
default:
assert(getNumOperands() == 2 && "Must be binary operator?");
if (OpNo == 0)
return ConstantExpr::get(getOpcode(), Op, getOperand(1));
return ConstantExpr::get(getOpcode(), getOperand(0), Op);
}
}
//===----------------------------------------------------------------------===//
// isValueValidForType implementations