When generating code for Win64 EH, emit StartProc and EndProc directives.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132250 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index dee6e53..81782ea 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -604,6 +604,11 @@
return CFI_M_None;
}
+bool AsmPrinter::needsSEHMoves() {
+ return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 &&
+ MF->getFunction()->needsUnwindTableEntry();
+}
+
void AsmPrinter::emitPrologLabel(const MachineInstr &MI) {
MCSymbol *Label = MI.getOperand(0).getMCSymbol();
diff --git a/lib/CodeGen/AsmPrinter/Win64Exception.cpp b/lib/CodeGen/AsmPrinter/Win64Exception.cpp
index c217aae..a23c05e 100644
--- a/lib/CodeGen/AsmPrinter/Win64Exception.cpp
+++ b/lib/CodeGen/AsmPrinter/Win64Exception.cpp
@@ -54,9 +54,35 @@
/// BeginFunction - Gather pre-function exception information. Assumes it's
/// being emitted immediately after the function entry point.
void Win64Exception::BeginFunction(const MachineFunction *MF) {
+ shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
+
+ // If any landing pads survive, we need an EH table.
+ bool hasLandingPads = !MMI->getLandingPads().empty();
+
+ shouldEmitMoves = Asm->needsSEHMoves();
+
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ unsigned PerEncoding = TLOF.getPersonalityEncoding();
+ const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
+
+ shouldEmitPersonality = hasLandingPads &&
+ PerEncoding != dwarf::DW_EH_PE_omit && Per;
+
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ shouldEmitLSDA = shouldEmitPersonality &&
+ LSDAEncoding != dwarf::DW_EH_PE_omit;
+
+ if (!shouldEmitPersonality && !shouldEmitMoves)
+ return;
+
+ Asm->OutStreamer.EmitWin64EHStartProc(Asm->CurrentFnSym);
}
/// EndFunction - Gather and emit post-function exception information.
///
void Win64Exception::EndFunction() {
+ if (!shouldEmitPersonality && !shouldEmitMoves)
+ return;
+
+ Asm->OutStreamer.EmitWin64EHEndProc();
}