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A bitcast of a global variable may have been constant folded to a GEP -

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handle this case too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36745 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2007-05-04 17:12:26 +00:00
parent e5b01bea7b
commit 3b346368de
1 changed files with 30 additions and 26 deletions
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56
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -2457,6 +2457,24 @@ void SelectionDAGLowering::visitTargetIntrinsic(CallInst &I,
}
}
/// ExtractGlobalVariable - If C is a global variable, or a bitcast of one
/// (possibly constant folded), return it. Otherwise return NULL.
static GlobalVariable *ExtractGlobalVariable (Constant *C) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C))
return GV;
else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::BitCast)
return dyn_cast<GlobalVariable>(CE->getOperand(0));
else if (CE->getOpcode() == Instruction::GetElementPtr) {
for (unsigned i = 1, e = CE->getNumOperands(); i != e; ++i)
if (!CE->getOperand(i)->isNullValue())
return NULL;
return dyn_cast<GlobalVariable>(CE->getOperand(0));
}
}
return NULL;
}
/// visitIntrinsicCall - Lower the call to the specified intrinsic function. If
/// we want to emit this as a call to a named external function, return the name
/// otherwise lower it and return null.
@ -2610,20 +2628,12 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
// MachineModuleInfo.
std::vector<GlobalVariable *> TyInfo;
for (unsigned i = 3, N = I.getNumOperands(); i < N; ++i) {
Constant *C = cast<Constant>(I.getOperand(i));
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(C)) {
TyInfo.push_back(GV);
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
assert(CE->getOpcode() == Instruction::BitCast &&
isa<GlobalVariable>(CE->getOperand(0))
&& "TypeInfo must be a global variable or NULL");
TyInfo.push_back(cast<GlobalVariable>(CE->getOperand(0)));
} else {
ConstantInt *CI = dyn_cast<ConstantInt>(C);
assert(CI && CI->isNullValue() &&
"TypeInfo must be a global variable or NULL");
TyInfo.push_back(NULL);
}
Constant *C = cast<Constant>(I.getOperand(i));
GlobalVariable *GV = ExtractGlobalVariable(C);
assert (GV || (isa<ConstantInt>(C) &&
cast<ConstantInt>(C)->isNullValue()) &&
"TypeInfo must be a global variable or NULL");
TyInfo.push_back(GV);
}
MMI->addCatchTypeInfo(CurMBB, TyInfo);
@ -2651,18 +2661,12 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
if (MMI) {
// Find the type id for the given typeinfo.
GlobalVariable *GV = NULL;
ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(1));
if (CE && CE->getOpcode() == Instruction::BitCast &&
isa<GlobalVariable>(CE->getOperand(0))) {
GV = cast<GlobalVariable>(CE->getOperand(0));
} else {
ConstantInt *CI = dyn_cast<ConstantInt>(I.getOperand(1));
assert(CI && CI->getZExtValue() == 0 &&
"TypeInfo must be a global variable typeinfo or NULL");
GV = NULL;
}
Constant *C = cast<Constant>(I.getOperand(1));
GlobalVariable *GV = ExtractGlobalVariable(C);
assert (GV || (isa<ConstantInt>(C) &&
cast<ConstantInt>(C)->isNullValue()) &&
"TypeInfo must be a global variable or NULL");
unsigned TypeID = MMI->getTypeIDFor(GV);
setValue(&I, DAG.getConstant(TypeID, MVT::i32));
} else {