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Tighter data structure for deleted debug labels.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31152 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2006-10-24 11:50:43 +00:00
parent ae5d51c9c9
commit fcc1d9473e
3 changed files with 22 additions and 8 deletions
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21
lib/CodeGen/MachineDebugInfo.cpp
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@ -1544,16 +1544,33 @@ unsigned MachineDebugInfo::RecordLabel(unsigned Line, unsigned Column,
return ID;
}
static bool LabelUIDComparison(const SourceLineInfo &LI, unsigned UID) {
return LI.getLabelID() < UID;
}
/// InvalidateLabel - Inhibit use of the specified label # from
/// MachineDebugInfo, for example because the code was deleted.
void MachineDebugInfo::InvalidateLabel(unsigned LabelID) {
DeletedLabelIDs.insert(LabelID);
// Check source line list first. SourceLineInfo is sorted by LabelID.
std::vector<SourceLineInfo>::iterator I =
std::lower_bound(Lines.begin(), Lines.end(), LabelID, LabelUIDComparison);
if (I != Lines.end() && I->getLabelID() == LabelID) {
Lines.erase(I);
return;
}
// Otherwise add for use by isLabelValid.
std::vector<unsigned>::iterator J =
std::lower_bound(DeletedLabelIDs.begin(), DeletedLabelIDs.end(), LabelID);
DeletedLabelIDs.insert(J, LabelID);
}
/// isLabelValid - Check to make sure the label is still valid before
/// attempting to use.
bool MachineDebugInfo::isLabelValid(unsigned LabelID) {
return DeletedLabelIDs.find(LabelID) == DeletedLabelIDs.end();
std::vector<unsigned>::iterator I =
std::lower_bound(DeletedLabelIDs.begin(), DeletedLabelIDs.end(), LabelID);
return I != DeletedLabelIDs.end() && *I == LabelID;
}
/// RecordSource - Register a source file with debug info. Returns an source