Move EH/Debug frame handling to the object streamer.

Now that the asm streamer doesn't use it, the MCStreamer doesn't need to know
about it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208562 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCObjectStreamer.h

@@ -35,6 +35,8 @@ class MCObjectStreamer : public MCStreamer {
   MCAssembler *Assembler;
   MCSectionData *CurSectionData;
   MCSectionData::iterator CurInsertionPoint;
+  bool EmitEHFrame;
+  bool EmitDebugFrame;
 
   virtual void EmitInstToData(const MCInst &Inst, const MCSubtargetInfo&) = 0;
   void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
@@ -57,6 +59,8 @@ public:
   MCSymbolData &getOrCreateSymbolData(const MCSymbol *Symbol) {
     return getAssembler().getOrCreateSymbolData(*Symbol);
   }
+  void EmitFrames(MCAsmBackend *MAB);
+  void EmitCFISections(bool EH, bool Debug) override;
 
 protected:
   MCSectionData *getCurrentSectionData() const {

include/llvm/MC/MCStreamer.h

@@ -154,9 +154,6 @@ class MCStreamer {
   MCStreamer(const MCStreamer &) LLVM_DELETED_FUNCTION;
   MCStreamer &operator=(const MCStreamer &) LLVM_DELETED_FUNCTION;
 
-  bool EmitEHFrame;
-  bool EmitDebugFrame;
-
   std::vector<MCDwarfFrameInfo> FrameInfos;
   MCDwarfFrameInfo *getCurrentFrameInfo();
   MCSymbol *EmitCFICommon();
@@ -189,7 +186,6 @@ protected:
   virtual void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame);
   void RecordProcEnd(MCDwarfFrameInfo &Frame);
   virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &CurFrame);
-  void EmitFrames(MCAsmBackend *MAB);
 
   MCWin64EHUnwindInfo *getCurrentW64UnwindInfo() {
     return CurrentW64UnwindInfo;

lib/MC/MCObjectStreamer.cpp

@@ -27,12 +27,13 @@ MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
     : MCStreamer(Context),
       Assembler(new MCAssembler(Context, TAB, *Emitter_,
                                 *TAB.createObjectWriter(OS), OS)),
-      CurSectionData(nullptr) {}
+      CurSectionData(nullptr), EmitEHFrame(true), EmitDebugFrame(false) {}
 
 MCObjectStreamer::MCObjectStreamer(MCContext &Context, MCAsmBackend &TAB,
                                    raw_ostream &OS, MCCodeEmitter *Emitter_,
                                    MCAssembler *_Assembler)
-    : MCStreamer(Context), Assembler(_Assembler), CurSectionData(nullptr) {}
+    : MCStreamer(Context), Assembler(_Assembler), CurSectionData(nullptr),
+      EmitEHFrame(true), EmitDebugFrame(false) {}
 
 MCObjectStreamer::~MCObjectStreamer() {
   delete &Assembler->getBackend();
@@ -46,9 +47,22 @@ void MCObjectStreamer::reset() {
     Assembler->reset();
   CurSectionData = nullptr;
   CurInsertionPoint = MCSectionData::iterator();
+  EmitEHFrame = true;
+  EmitDebugFrame = false;
   MCStreamer::reset();
 }
 
+void MCObjectStreamer::EmitFrames(MCAsmBackend *MAB) {
+  if (!getNumFrameInfos())
+    return;
+
+  if (EmitEHFrame)
+    MCDwarfFrameEmitter::Emit(*this, MAB, true);
+
+  if (EmitDebugFrame)
+    MCDwarfFrameEmitter::Emit(*this, MAB, false);
+}
+
 MCFragment *MCObjectStreamer::getCurrentFragment() const {
   assert(getCurrentSectionData() && "No current section!");
 
@@ -97,6 +111,12 @@ const MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) {
   return Value;
 }
 
+void MCObjectStreamer::EmitCFISections(bool EH, bool Debug) {
+  MCStreamer::EmitCFISections(EH, Debug);
+  EmitEHFrame = EH;
+  EmitDebugFrame = Debug;
+}
+
 void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
                                      const SMLoc &Loc) {
   MCDataFragment *DF = getOrCreateDataFragment();

lib/MC/MCStreamer.cpp

@@ -37,8 +37,7 @@ void MCTargetStreamer::finish() {}
 void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
 
 MCStreamer::MCStreamer(MCContext &Ctx)
-    : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
+    : Context(Ctx), CurrentW64UnwindInfo(nullptr), LastSymbol(nullptr) {
-      CurrentW64UnwindInfo(nullptr), LastSymbol(nullptr) {
   SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
 }
 
@@ -51,8 +50,6 @@ void MCStreamer::reset() {
   for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
     delete W64UnwindInfos[i];
   W64UnwindInfos.clear();
-  EmitEHFrame = true;
-  EmitDebugFrame = false;
   CurrentW64UnwindInfo = nullptr;
   LastSymbol = nullptr;
   SectionStack.clear();
@@ -259,8 +256,6 @@ void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
 
 void MCStreamer::EmitCFISections(bool EH, bool Debug) {
   assert(EH || Debug);
-  EmitEHFrame = EH;
-  EmitDebugFrame = Debug;
 }
 
 void MCStreamer::EmitCFIStartProc(bool IsSimple) {
@@ -615,17 +610,6 @@ void MCStreamer::EmitRawText(const Twine &T) {
   EmitRawTextImpl(T.toStringRef(Str));
 }
 
-void MCStreamer::EmitFrames(MCAsmBackend *MAB) {
-  if (!getNumFrameInfos())
-    return;
-
-  if (EmitEHFrame)
-    MCDwarfFrameEmitter::Emit(*this, MAB, true);
-
-  if (EmitDebugFrame)
-    MCDwarfFrameEmitter::Emit(*this, MAB, false);
-}
-
 void MCStreamer::EmitW64Tables() {
   if (!getNumW64UnwindInfos())
     return;