DwarfCFIException::DwarfCFIException(AsmPrinter *A)
: DwarfException(A),
- shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
+ shouldEmitPersonality(false), shouldEmitLSDA(false), shouldEmitMoves(false)
{}
DwarfCFIException::~DwarfCFIException() {}
if (!Asm->MAI->isExceptionHandlingDwarf())
return;
- if (!shouldEmitTableModule)
- return;
-
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
unsigned PerEncoding = TLOF.getPersonalityEncoding();
// Emit references to all used personality functions
const std::vector<const Function*> &Personalities = MMI->getPersonalities();
for (size_t i = 0, e = Personalities.size(); i != e; ++i) {
- const MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]);
+ if (!Personalities[i])
+ continue;
+ MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]);
TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym);
}
}
/// BeginFunction - Gather pre-function exception information. Assumes it's
/// being emitted immediately after the function entry point.
void DwarfCFIException::BeginFunction(const MachineFunction *MF) {
- shouldEmitTable = shouldEmitMoves = false;
+ shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
// If any landing pads survive, we need an EH table.
- shouldEmitTable = !MMI->getLandingPads().empty();
+ bool hasLandingPads = !MMI->getLandingPads().empty();
// See if we need frame move info.
shouldEmitMoves = Asm->needsCFIMoves();
- if (shouldEmitMoves || shouldEmitTable)
- // Assumes in correct section after the entry point.
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
- Asm->getFunctionNumber()));
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ unsigned PerEncoding = TLOF.getPersonalityEncoding();
+ const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
- shouldEmitTableModule |= shouldEmitTable;
+ shouldEmitPersonality = hasLandingPads &&
+ PerEncoding != dwarf::DW_EH_PE_omit && Per;
- if (shouldEmitMoves || shouldEmitTable)
- Asm->OutStreamer.EmitCFIStartProc();
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ shouldEmitLSDA = shouldEmitPersonality &&
+ LSDAEncoding != dwarf::DW_EH_PE_omit;
- if (!shouldEmitTable)
+ if (!shouldEmitPersonality && !shouldEmitMoves)
return;
- const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
-
- // Provide LSDA information.
- unsigned LSDAEncoding = TLOF.getLSDAEncoding();
- if (LSDAEncoding != dwarf::DW_EH_PE_omit)
- Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
- Asm->getFunctionNumber()),
- LSDAEncoding);
+ Asm->OutStreamer.EmitCFIStartProc();
// Indicate personality routine, if any.
- unsigned PerEncoding = TLOF.getPersonalityEncoding();
- const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
- if (PerEncoding == dwarf::DW_EH_PE_omit || !Per)
+ if (!shouldEmitPersonality)
return;
const MCSymbol *Sym = TLOF.getCFIPersonalitySymbol(Per, Asm->Mang, MMI);
Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding);
+
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
+ Asm->getFunctionNumber()));
+
+ // Provide LSDA information.
+ if (!shouldEmitLSDA)
+ return;
+
+ Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
+ Asm->getFunctionNumber()),
+ LSDAEncoding);
}
/// EndFunction - Gather and emit post-function exception information.
///
void DwarfCFIException::EndFunction() {
- if (!shouldEmitMoves && !shouldEmitTable) return;
+ if (!shouldEmitPersonality && !shouldEmitMoves)
+ return;
Asm->OutStreamer.EmitCFIEndProc();
// Map all labels and get rid of any dead landing pads.
MMI->TidyLandingPads();
- if (shouldEmitTable)
+ if (shouldEmitPersonality)
EmitExceptionTable();
}