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-rw-r--r--contrib/llvm/lib/CodeGen/AsmPrinter/WinException.cpp36
1 files changed, 21 insertions, 15 deletions
diff --git a/contrib/llvm/lib/CodeGen/AsmPrinter/WinException.cpp b/contrib/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
index 1ba6060..79830bc 100644
--- a/contrib/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
+++ b/contrib/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
@@ -319,6 +319,7 @@ void WinException::emitCXXFrameHandler3Table(const MachineFunction *MF) {
return;
} else {
FuncInfoXData = Asm->OutContext.getOrCreateLSDASymbol(ParentLinkageName);
+ emitEHRegistrationOffsetLabel(FuncInfo, ParentLinkageName);
}
MCSymbol *UnwindMapXData = nullptr;
@@ -547,28 +548,33 @@ void WinException::extendIP2StateTable(const MachineFunction *MF,
}
}
+void WinException::emitEHRegistrationOffsetLabel(const WinEHFuncInfo &FuncInfo,
+ StringRef FLinkageName) {
+ // Outlined helpers called by the EH runtime need to know the offset of the EH
+ // registration in order to recover the parent frame pointer. Now that we know
+ // we've code generated the parent, we can emit the label assignment that
+ // those helpers use to get the offset of the registration node.
+ assert(FuncInfo.EHRegNodeEscapeIndex != INT_MAX &&
+ "no EH reg node frameescape index");
+ MCSymbol *ParentFrameOffset =
+ Asm->OutContext.getOrCreateParentFrameOffsetSymbol(FLinkageName);
+ MCSymbol *RegistrationOffsetSym = Asm->OutContext.getOrCreateFrameAllocSymbol(
+ FLinkageName, FuncInfo.EHRegNodeEscapeIndex);
+ const MCExpr *RegistrationOffsetSymRef =
+ MCSymbolRefExpr::create(RegistrationOffsetSym, Asm->OutContext);
+ Asm->OutStreamer->EmitAssignment(ParentFrameOffset, RegistrationOffsetSymRef);
+}
+
/// Emit the language-specific data that _except_handler3 and 4 expect. This is
/// functionally equivalent to the __C_specific_handler table, except it is
/// indexed by state number instead of IP.
void WinException::emitExceptHandlerTable(const MachineFunction *MF) {
MCStreamer &OS = *Asm->OutStreamer;
-
- // Define the EH registration node offset label in terms of its frameescape
- // label. The WinEHStatePass ensures that the registration node is passed to
- // frameescape. This allows SEH filter functions to access the
- // EXCEPTION_POINTERS field, which is filled in by the _except_handlerN.
const Function *F = MF->getFunction();
- WinEHFuncInfo &FuncInfo = MMI->getWinEHFuncInfo(F);
- assert(FuncInfo.EHRegNodeEscapeIndex != INT_MAX &&
- "no EH reg node frameescape index");
StringRef FLinkageName = GlobalValue::getRealLinkageName(F->getName());
- MCSymbol *ParentFrameOffset =
- Asm->OutContext.getOrCreateParentFrameOffsetSymbol(FLinkageName);
- MCSymbol *FrameAllocSym = Asm->OutContext.getOrCreateFrameAllocSymbol(
- FLinkageName, FuncInfo.EHRegNodeEscapeIndex);
- const MCSymbolRefExpr *FrameAllocSymRef =
- MCSymbolRefExpr::create(FrameAllocSym, Asm->OutContext);
- OS.EmitAssignment(ParentFrameOffset, FrameAllocSymRef);
+
+ WinEHFuncInfo &FuncInfo = MMI->getWinEHFuncInfo(F);
+ emitEHRegistrationOffsetLabel(FuncInfo, FLinkageName);
// Emit the __ehtable label that we use for llvm.x86.seh.lsda.
MCSymbol *LSDALabel = Asm->OutContext.getOrCreateLSDASymbol(FLinkageName);
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