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Fix BlockAddress::replaceUsesOfWithOnConstant to correctly

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maintain the block use count in SubclassData.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85701 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-11-01 03:03:03 +00:00
parent 2a749d3647
commit d0ec2352ae
1 changed files with 8 additions and 5 deletions
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13
lib/VMCore/Constants.cpp
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@ -7,7 +7,7 @@
//
//===----------------------------------------------------------------------===//
//
// This file implements the Constant* classes...
// This file implements the Constant* classes.
//
//===----------------------------------------------------------------------===//
@ -1043,8 +1043,8 @@ BlockAddress *BlockAddress::get(Function *F, BasicBlock *BB) {
BlockAddress::BlockAddress(Function *F, BasicBlock *BB)
: Constant(Type::getInt8PtrTy(F->getContext()), Value::BlockAddressVal,
&Op<0>(), 2) {
Op<0>() = F;
Op<1>() = BB;
setOperand(0, F);
setOperand(1, BB);
BB->AdjustBlockAddressRefCount(1);
}
@ -1074,13 +1074,16 @@ void BlockAddress::replaceUsesOfWithOnConstant(Value *From, Value *To, Use *U) {
BlockAddress *&NewBA =
getContext().pImpl->BlockAddresses[std::make_pair(NewF, NewBB)];
if (NewBA == 0) {
getBasicBlock()->AdjustBlockAddressRefCount(-1);
// Remove the old entry, this can't cause the map to rehash (just a
// tombstone will get added).
getContext().pImpl->BlockAddresses.erase(std::make_pair(getFunction(),
getBasicBlock()));
NewBA = this;
Op<0>() = NewF;
Op<1>() = NewBB;
setOperand(0, NewF);
setOperand(1, NewBB);
getBasicBlock()->AdjustBlockAddressRefCount(1);
return;
}