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fix a bug in DebugRecVH::deleted/allUsesReplacedWith. If an

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entry in the Scope+InlinedAt drops to a non-canonical form,
we need to reset the idx member of both VH's to 0.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100084 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-04-01 05:12:07 +00:00
parent 73180c5355
commit 175edf2c78
1 changed files with 7 additions and 4 deletions
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11
lib/VMCore/DebugLoc.cpp
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@ -220,9 +220,10 @@ void DebugRecVH::deleted() {
"Mapping out of date");
Ctx->ScopeInlinedAtIdx.erase(std::make_pair(OldScope, OldInlinedAt));
// Reset this VH to null.
// Reset this VH to null. Drop both 'Idx' values to null to indicate that
// we're in non-canonical form now.
setValPtr(0);
Idx = 0;
Entry.first.Idx = Entry.second.Idx = 0;
}
void DebugRecVH::allUsesReplacedWith(Value *NewVa) {
@ -280,6 +281,8 @@ void DebugRecVH::allUsesReplacedWith(Value *NewVa) {
Entry.second.get(), Idx);
// If NewVal already has an entry, this becomes a non-canonical reference,
// just drop Idx to 0 to signify this.
if (NewIdx != Idx)
Idx = 0;
if (NewIdx != Idx) {
std::pair<DebugRecVH, DebugRecVH> &Entry=Ctx->ScopeInlinedAtRecords[-Idx-1];
Entry.first.Idx = Entry.second.Idx = 0;
}
}