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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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36
include/llvm/CodeGen/MachineModuleInfo.h
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@ -960,16 +960,13 @@ struct LandingPadInfo {
SmallVector<unsigned, 1> EndLabels; // Labels after invoke.
unsigned LandingPadLabel; // Label at beginning of landing pad.
Function *Personality; // Personality function.
std::vector<unsigned> TypeIds; // List of type ids.
bool IsFilter; // Indicate if the landing pad is a
// throw filter.
std::vector<int> TypeIds; // List of type ids (filters negative)
LandingPadInfo(MachineBasicBlock *MBB)
: LandingPadBlock(MBB)
, LandingPadLabel(0)
, Personality(NULL)
, TypeIds()
, IsFilter(false)
{}
};
@ -1021,6 +1018,10 @@ private:
//
std::vector<GlobalVariable *> TypeInfos;
// FilterIds - List of typeids encoding filters used in the current function.
//
std::vector<unsigned> FilterIds;
// Personalities - Vector of all personality functions ever seen. Used to emit
// common EH frames.
std::vector<Function *> Personalities;
@ -1213,20 +1214,25 @@ public:
const std::vector<Function *>& getPersonalities() const {
return Personalities;
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void addCatchTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo);
/// setIsFilterLandingPad - Indicates that the landing pad is a throw filter.
/// addFilterTypeInfo - Provide the filter typeinfo for a landing pad.
///
void setIsFilterLandingPad(MachineBasicBlock *LandingPad);
void addFilterTypeInfo(MachineBasicBlock *LandingPad,
std::vector<GlobalVariable *> &TyInfo);
/// getTypeIDFor - Return the type id for the specified typeinfo. This is
/// function wide.
unsigned getTypeIDFor(GlobalVariable *TI);
/// getFilterIDFor - Return the id of the filter encoded by TyIds. This is
/// function wide.
int getFilterIDFor(std::vector<unsigned> &TyIds);
/// TidyLandingPads - Remap landing pad labels and remove any deleted landing
/// pads.
void TidyLandingPads();
@ -1242,7 +1248,13 @@ public:
const std::vector<GlobalVariable *> &getTypeInfos() const {
return TypeInfos;
}
/// getFilterIds - Return a reference to the typeids encoding filters used in
/// the current function.
const std::vector<unsigned> &getFilterIds() const {
return FilterIds;
}
/// getPersonality - Return a personality function if available. The presence
/// of one is required to emit exception handling info.
Function *getPersonality() const;