[WinEH] Emit EH tables for __CxxFrameHandler3 on 32-bit x86

[oota-llvm.git] / lib / MC / MCStreamer.cpp

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 31e932098429e42f61c1a55bbb65a7a5bbbd900d..03ef7eda72cf80ae6e1b215fe6fb98106c615934 100644 (file)
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -188,7 +188,7 @@ void MCStreamer::InitSections(bool NoExecStack) {
   SwitchSection(getContext().getObjectFileInfo()->getTextSection());
 }
 
-void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
+void MCStreamer::AssignSection(MCSymbol *Symbol, MCSection *Section) {
   if (Section)
     Symbol->setSection(*Section);
   else
@@ -391,11 +391,17 @@ void MCStreamer::EmitCFIWindowSave() {
 }
 
 void MCStreamer::EnsureValidWinFrameInfo() {
+  const MCAsmInfo *MAI = Context.getAsmInfo();
+  if (!MAI->usesWindowsCFI())
+    report_fatal_error(".seh_* directives are not supported on this target");
   if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
     report_fatal_error("No open Win64 EH frame function!");
 }
 
 void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
+  const MCAsmInfo *MAI = Context.getAsmInfo();
+  if (!MAI->usesWindowsCFI())
+    report_fatal_error(".seh_* directives are not supported on this target");
   if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
     report_fatal_error("Starting a function before ending the previous one!");
 
@@ -640,9 +646,9 @@ void MCStreamer::EmitCOFFSymbolType(int Type) {}
 void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
 void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                                        unsigned ByteAlignment) {}
-void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
                                 uint64_t Size, unsigned ByteAlignment) {}
-void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
+void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
 void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
 void MCStreamer::EmitBytes(StringRef Data) {}
 void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
@@ -664,22 +670,21 @@ void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
 void MCStreamer::FinishImpl() {}
 void MCStreamer::EmitBundleUnlock() {}
 
-void MCStreamer::SwitchSection(const MCSection *Section,
-                               const MCExpr *Subsection) {
+void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
   assert(Section && "Cannot switch to a null section!");
   MCSectionSubPair curSection = SectionStack.back().first;
   SectionStack.back().second = curSection;
   if (MCSectionSubPair(Section, Subsection) != curSection) {
+    ChangeSection(Section, Subsection);
     SectionStack.back().first = MCSectionSubPair(Section, Subsection);
     assert(!Section->hasEnded() && "Section already ended");
-    ChangeSection(Section, Subsection);
     MCSymbol *Sym = Section->getBeginSymbol();
     if (Sym && !Sym->isInSection())
       EmitLabel(Sym);
   }
 }
 
-MCSymbol *MCStreamer::endSection(const MCSection *Section) {
+MCSymbol *MCStreamer::endSection(MCSection *Section) {
   // TODO: keep track of the last subsection so that this symbol appears in the
   // correct place.
   MCSymbol *Sym = Section->getEndSymbol(Context);