Convert assert(0) to llvm_unreachable

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

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 2a37f82a518959a57dc8eba3f1b5940cf2ce4115..6d53fb196c67c1c3fff26c6dde35643dc28d1a44 100644 (file)
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -16,7 +16,6 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/Twine.h"
 #include <cstdlib>
 using namespace llvm;
@@ -94,10 +93,11 @@ void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
 
 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
 /// client having to pass in a MCExpr for constant integers.
-void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace) {
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
+                                     unsigned Padding) {
   SmallString<32> Tmp;
   raw_svector_ostream OSE(Tmp);
-  MCObjectWriter::EncodeULEB128(Value, OSE);
+  MCObjectWriter::EncodeULEB128(Value, OSE, Padding);
   EmitBytes(OSE.str(), AddrSpace);
 }
 
@@ -128,6 +128,10 @@ void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
                 AddrSpace);
 }
 
+void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
   report_fatal_error("unsupported directive in streamer");
 }
@@ -187,9 +191,8 @@ void MCStreamer::EmitDataRegion() {
   if (!MAI.getSupportsDataRegions()) return;
 
   // Generate a unique symbol name.
-  MCSymbol *NewSym = Context.GetOrCreateSymbol(
-      Twine(MAI.getDataBeginLabelName()) +
-        utostr(UniqueDataBeginSuffix++));
+  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getDataBeginLabelName() +
+                                               Twine(UniqueDataBeginSuffix++));
   EmitLabel(NewSym);
 
   RegionIndicator = Data;
@@ -203,9 +206,8 @@ void MCStreamer::EmitCodeRegion() {
   if (!MAI.getSupportsDataRegions()) return;
 
   // Generate a unique symbol name.
-  MCSymbol *NewSym = Context.GetOrCreateSymbol(
-      Twine(MAI.getCodeBeginLabelName()) +
-        utostr(UniqueCodeBeginSuffix++));
+  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getCodeBeginLabelName() +
+                                               Twine(UniqueCodeBeginSuffix++));
   EmitLabel(NewSym);
 
   RegionIndicator = Code;
@@ -219,9 +221,9 @@ void MCStreamer::EmitJumpTable8Region() {
   if (!MAI.getSupportsDataRegions()) return;
 
   // Generate a unique symbol name.
-  MCSymbol *NewSym = Context.GetOrCreateSymbol(
-      Twine(MAI.getJumpTable8BeginLabelName()) +
-        utostr(UniqueDataBeginSuffix++));
+  MCSymbol *NewSym =
+    Context.GetOrCreateSymbol(MAI.getJumpTable8BeginLabelName() +
+                              Twine(UniqueDataBeginSuffix++));
   EmitLabel(NewSym);
 
   RegionIndicator = JumpTable8;
@@ -235,9 +237,9 @@ void MCStreamer::EmitJumpTable16Region() {
   if (!MAI.getSupportsDataRegions()) return;
 
   // Generate a unique symbol name.
-  MCSymbol *NewSym = Context.GetOrCreateSymbol(
-      Twine(MAI.getJumpTable16BeginLabelName()) +
-        utostr(UniqueDataBeginSuffix++));
+  MCSymbol *NewSym =
+    Context.GetOrCreateSymbol(MAI.getJumpTable16BeginLabelName() +
+                              Twine(UniqueDataBeginSuffix++));
   EmitLabel(NewSym);
 
   RegionIndicator = JumpTable16;
@@ -252,9 +254,9 @@ void MCStreamer::EmitJumpTable32Region() {
   if (!MAI.getSupportsDataRegions()) return;
 
   // Generate a unique symbol name.
-  MCSymbol *NewSym = Context.GetOrCreateSymbol(
-      Twine(MAI.getJumpTable32BeginLabelName()) +
-        utostr(UniqueDataBeginSuffix++));
+  MCSymbol *NewSym =
+    Context.GetOrCreateSymbol(MAI.getJumpTable32BeginLabelName() +
+                              Twine(UniqueDataBeginSuffix++));
   EmitLabel(NewSym);
 
   RegionIndicator = JumpTable32;
@@ -278,8 +280,17 @@ void MCStreamer::EmitCFIStartProc() {
     report_fatal_error("Starting a frame before finishing the previous one!");
 
   MCDwarfFrameInfo Frame;
-  Frame.Function = LastSymbol;
+  EmitCFIStartProcImpl(Frame);
 
+  FrameInfos.push_back(Frame);
+  RegionIndicator = Code;
+}
+
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
+  Frame.Function = LastSymbol;
   // If the function is externally visible, we need to create a local
   // symbol to avoid relocations.
   StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
@@ -289,16 +300,20 @@ void MCStreamer::EmitCFIStartProc() {
     Frame.Begin = getContext().CreateTempSymbol();
     EmitLabel(Frame.Begin);
   }
-
-  FrameInfos.push_back(Frame);
-  RegionIndicator = Code;
 }
 
 void MCStreamer::EmitCFIEndProc() {
   EnsureValidFrame();
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
-  CurFrame->End = getContext().CreateTempSymbol();
-  EmitLabel(CurFrame->End);
+  EmitCFIEndProcImpl(*CurFrame);
+}
+
+void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
+  Frame.End = getContext().CreateTempSymbol();
+  EmitLabel(Frame.End);
 }
 
 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
@@ -387,7 +402,7 @@ void MCStreamer::EmitCFIRememberState() {
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
   MCSymbol *Label = getContext().CreateTempSymbol();
   EmitLabel(Label);
-  MCCFIInstruction Instruction(MCCFIInstruction::Remember, Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
   CurFrame->Instructions.push_back(Instruction);
 }
 
@@ -397,7 +412,7 @@ void MCStreamer::EmitCFIRestoreState() {
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
   MCSymbol *Label = getContext().CreateTempSymbol();
   EmitLabel(Label);
-  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
   CurFrame->Instructions.push_back(Instruction);
 }
 
@@ -410,6 +425,30 @@ void MCStreamer::EmitCFISameValue(int64_t Register) {
   CurFrame->Instructions.push_back(Instruction);
 }
 
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  MCSymbol *Label = getContext().CreateTempSymbol();
+  EmitLabel(Label);
+  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISignalFrame() {
+  EnsureValidFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+  CurFrame->IsSignalFrame = true;
+}
+
 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
   W64UnwindInfos.push_back(Frame);
   CurrentW64UnwindInfo = W64UnwindInfos.back();
@@ -560,6 +599,10 @@ void MCStreamer::EmitWin64EHEndProlog() {
   EmitLabel(CurFrame->PrologEnd);
 }
 
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+  llvm_unreachable("This file format doesn't support this directive");
+}
+
 void MCStreamer::EmitFnStart() {
   errs() << "Not implemented yet\n";
   abort();
@@ -632,3 +675,10 @@ void MCStreamer::EmitW64Tables() {
 
   MCWin64EHUnwindEmitter::Emit(*this);
 }
+
+void MCStreamer::Finish() {
+  if (!FrameInfos.empty() && !FrameInfos.back().End)
+    report_fatal_error("Unfinished frame!");
+
+  FinishImpl();
+}