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Integrate exception filter support and exception catch support. This

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simplifies the code in DwarfWriter, allows for multiple filters and
makes it trivial to specify filters accompanied by cleanups or catch-all
specifications (see next patch).  What a deal!  Patch blessed by Anton.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37398 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-06-02 16:53:42 +00:00
parent 02031c0ff8
commit 73ef58ab92
4 changed files with 72 additions and 72 deletions
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27
lib/CodeGen/MachineModuleInfo.cpp
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@ -1521,6 +1521,7 @@ void MachineModuleInfo::EndFunction() {
// Clean up exception info.
LandingPads.clear();
TypeInfos.clear();
FilterIds.clear();
}
/// getDescFor - Convert a Value to a debug information descriptor.
@ -1708,12 +1709,16 @@ void MachineModuleInfo::addCatchTypeInfo(MachineBasicBlock *LandingPad,
for (unsigned N = TyInfo.size(); N; --N)
LP.TypeIds.push_back(getTypeIDFor(TyInfo[N - 1]));
}
/// setIsFilterLandingPad - Indicates that the landing pad is a throw filter.
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
void MachineModuleInfo::setIsFilterLandingPad(MachineBasicBlock *LandingPad) {
void MachineModuleInfo::addFilterTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.IsFilter = true;
std::vector<unsigned> IdsInFilter (TyInfo.size());
for (unsigned I = 0, E = TyInfo.size(); I != E; ++I)
IdsInFilter[I] = getTypeIDFor(TyInfo[I]);
LP.TypeIds.push_back(getFilterIDFor(IdsInFilter));
}
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
@ -1760,6 +1765,20 @@ unsigned MachineModuleInfo::getTypeIDFor(GlobalVariable *TI) {
return TypeInfos.size();
}
/// getFilterIDFor - Return the filter id for the specified typeinfos. This is
/// function wide.
int MachineModuleInfo::getFilterIDFor(std::vector<unsigned> &TyIds) {
// TODO: map duplicate filters to the same filter id; a filter equal to the
// tail of an existing filter also need not be added; re-order filters and
// filter elements to maximize this kind of sharing.
int FilterID = -(1 + FilterIds.size());
FilterIds.reserve(FilterIds.size() + TyIds.size() + 1);
for (unsigned I = 0, N = TyIds.size(); I != N; ++I)
FilterIds.push_back(TyIds[I]);
FilterIds.push_back(0); // terminator
return FilterID;
}
/// getPersonality - Return the personality function for the current function.
Function *MachineModuleInfo::getPersonality() const {
// FIXME: Until PR1414 will be fixed, we're using 1 personality function per