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bitcode writer support for blockaddress.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85376 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-10-28 05:24:40 +00:00
parent 0eeb913aa1
commit 837e04a8bf
4 changed files with 54 additions and 9 deletions
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44
lib/Bitcode/Writer/ValueEnumerator.cpp
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@ -223,7 +223,9 @@ void ValueEnumerator::EnumerateMetadata(const MetadataBase *MD) {
EnumerateType(Type::getVoidTy(MD->getContext()));
}
return;
} else if (const NamedMDNode *N = dyn_cast<NamedMDNode>(MD)) {
}
if (const NamedMDNode *N = dyn_cast<NamedMDNode>(MD)) {
for(NamedMDNode::const_elem_iterator I = N->elem_begin(),
E = N->elem_end(); I != E; ++I) {
MetadataBase *M = *I;
@ -274,7 +276,8 @@ void ValueEnumerator::EnumerateValue(const Value *V) {
// graph that don't go through a global variable.
for (User::const_op_iterator I = C->op_begin(), E = C->op_end();
I != E; ++I)
EnumerateValue(*I);
if (!isa<BasicBlock>(*I)) // Don't enumerate BB operand to BlockAddress.
EnumerateValue(*I);
// Finally, add the value. Doing this could make the ValueID reference be
// dangling, don't reuse it.
@ -320,15 +323,20 @@ void ValueEnumerator::EnumerateOperandType(const Value *V) {
// This constant may have operands, make sure to enumerate the types in
// them.
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
EnumerateOperandType(C->getOperand(i));
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i) {
const User *Op = C->getOperand(i);
// Don't enumerate basic blocks here, this happens as operands to
// blockaddress.
if (isa<BasicBlock>(Op)) continue;
EnumerateOperandType(cast<Constant>(Op));
}
if (const MDNode *N = dyn_cast<MDNode>(V)) {
for (unsigned i = 0, e = N->getNumElements(); i != e; ++i) {
Value *Elem = N->getElement(i);
if (Elem)
for (unsigned i = 0, e = N->getNumElements(); i != e; ++i)
if (Value *Elem = N->getElement(i))
EnumerateOperandType(Elem);
}
}
} else if (isa<MDString>(V) || isa<MDNode>(V))
EnumerateValue(V);
@ -397,3 +405,23 @@ void ValueEnumerator::purgeFunction() {
Values.resize(NumModuleValues);
BasicBlocks.clear();
}
static void IncorporateFunctionInfoGlobalBBIDs(const Function *F,
DenseMap<const BasicBlock*, unsigned> &IDMap) {
unsigned Counter = 0;
for (Function::const_iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
IDMap[BB] = ++Counter;
}
/// getGlobalBasicBlockID - This returns the function-specific ID for the
/// specified basic block. This is relatively expensive information, so it
/// should only be used by rare constructs such as address-of-label.
unsigned ValueEnumerator::getGlobalBasicBlockID(const BasicBlock *BB) const {
unsigned &Idx = GlobalBasicBlockIDs[BB];
if (Idx != 0)
return Idx-1;
IncorporateFunctionInfoGlobalBBIDs(BB->getParent(), GlobalBasicBlockIDs);
return getGlobalBasicBlockID(BB);
}