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Emit the Itanium LSDA for unknown EH personalities on Win64

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This fixes lots of generic CodeGen tests that use __gcc_personality_v0.
This suggests that using ExceptionHandling::MSVC was a mistake, and we
should instead classify each function by personality function. This
would, for example, allow us to LTO a binary containing uses of SEH and
Itanium EH.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226019 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2015-01-14 18:50:10 +00:00
parent 983125f9b4
commit 4350881a94
2 changed files with 10 additions and 11 deletions
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17
lib/CodeGen/AsmPrinter/Win64Exception.cpp
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@ -103,18 +103,13 @@ void Win64Exception::endFunction(const MachineFunction *) {
// Emit an UNWIND_INFO struct describing the prologue.
Asm->OutStreamer.EmitWinEHHandlerData();
// Emit either MSVC-compatible tables or the usual Itanium-style LSDA after
// the UNWIND_INFO struct.
if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::MSVC) {
const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
if (Per->getName() == "__C_specific_handler")
emitCSpecificHandlerTable();
else
report_fatal_error(Twine("unexpected personality function: ") +
Per->getName());
} else {
// Emit the tables appropriate to the personality function in use. If we
// don't recognize the personality, assume it uses an Itanium-style LSDA.
const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
if (Per->getName() == "__C_specific_handler")
emitCSpecificHandlerTable();
else
emitExceptionTable();
}
Asm->OutStreamer.PopSection();
}

4
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -941,6 +941,10 @@ void SelectionDAGISel::PrepareEHLandingPad() {
*MBB, MBB->begin(), SDB->getCurDebugLoc(), TII->get(TargetOpcode::PHI),
FuncInfo->ExceptionSelectorVirtReg);
for (unsigned I = 0, E = LPadInst->getNumClauses(); I != E; ++I) {
// Skip filter clauses, we can't implement them yet.
if (LPadInst->isFilter(I))
continue;
MachineBasicBlock *ClauseBB = MF->CreateMachineBasicBlock(LLVMBB);
MF->insert(MBB, ClauseBB);