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Add support for more constant expressions

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6203 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-05-14 17:51:49 +00:00
parent 3b9922f99c
commit 9a23122b6a
1 changed files with 35 additions and 6 deletions
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41
lib/ExecutionEngine/ExecutionEngine.cpp
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@ -31,10 +31,10 @@ void *ExecutionEngine::getPointerToGlobal(const GlobalValue *GV) {
GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
GenericValue Result;
if (ConstantExpr *CE = const_cast<ConstantExpr*>(dyn_cast<ConstantExpr>(C)))
if (ConstantExpr *CE = const_cast<ConstantExpr*>(dyn_cast<ConstantExpr>(C))) {
switch (CE->getOpcode()) {
case Instruction::GetElementPtr: {
Result = getConstantValue(cast<Constant>(CE->getOperand(0)));
Result = getConstantValue(CE->getOperand(0));
std::vector<Value*> Indexes(CE->op_begin()+1, CE->op_end());
uint64_t Offset =
TD->getIndexedOffset(CE->getOperand(0)->getType(), Indexes);
@ -42,13 +42,42 @@ GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
Result.LongVal += Offset;
return Result;
}
case Instruction::Cast: {
// We only need to handle a few cases here. Almost all casts will
// automatically fold, just the ones involving pointers won't.
//
Constant *Op = CE->getOperand(0);
default:
std::cerr << "ConstantExpr not handled as global var init: " << *CE
<< "\n";
abort();
// Handle cast of pointer to pointer...
if (Op->getType()->getPrimitiveID() == C->getType()->getPrimitiveID())
return getConstantValue(Op);
// Handle cast of long to pointer or pointer to long...
if ((isa<PointerType>(Op->getType()) && (C->getType() == Type::LongTy ||
C->getType() == Type::ULongTy))||
(isa<PointerType>(C->getType()) && (Op->getType() == Type::LongTy ||
Op->getType() == Type::ULongTy))){
return getConstantValue(Op);
}
break;
}
case Instruction::Add:
if (C->getOperand(0)->getType() == Type::LongTy ||
C->getOperand(0)->getType() == Type::ULongTy)
Result.LongVal = getConstantValue(C->getOperand(0)).LongVal +
getConstantValue(C->getOperand(1)).LongVal;
else
break;
return Result;
default:
break;
}
std::cerr << "ConstantExpr not handled as global var init: " << *CE << "\n";
abort();
}
switch (C->getType()->getPrimitiveID()) {
#define GET_CONST_VAL(TY, CLASS) \
case Type::TY##TyID: Result.TY##Val = cast<CLASS>(C)->getValue(); break