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Add support for constant expr shifts

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9735 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-11-05 19:53:03 +00:00
parent 80f0b57b5d
commit 29e3b2ba77
2 changed files with 9 additions and 0 deletions
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2
lib/Bytecode/Reader/ConstantReader.cpp
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@ -182,6 +182,8 @@ Constant *BytecodeParser::parseConstantValue(const unsigned char *&Buf,
} else if (Opcode == Instruction::GetElementPtr) { // GetElementPtr
std::vector<Constant*> IdxList(ArgVec.begin()+1, ArgVec.end());
return ConstantExpr::getGetElementPtr(ArgVec[0], IdxList);
} else if (Opcode == Instruction::Shl || Opcode == Instruction::Shr) {
return ConstantExpr::getShift(Opcode, ArgVec[0], ArgVec[1]);
} else { // All other 2-operand expressions
return ConstantExpr::get(Opcode, ArgVec[0], ArgVec[1]);
}

7
lib/VMCore/Constants.cpp
View File

@ -493,6 +493,13 @@ void ConstantExpr::replaceUsesOfWithOnConstant(Value *From, Value *ToV,
} else if (getOpcode() == Instruction::Cast) {
assert(getOperand(0) == From && "Cast only has one use!");
Replacement = ConstantExpr::getCast(To, getType());
} else if (getOpcode() == Instruction::Shl ||
getOpcode() == Instruction::Shr) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);
if (C1 == From) C1 = To;
if (C2 == From) C2 = To;
Replacement = ConstantExpr::getShift(getOpcode(), C1, C2);
} else if (getNumOperands() == 2) {
Constant *C1 = getOperand(0);
Constant *C2 = getOperand(1);