Remove unnecessary caching of the TargetMachine on NVPTXFrameLowering.

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

diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 4c99c0add725d89c9760a0da14d0e0f311bfeccc..ab7e4c75768b6f745ff08621a9138dc0bd481b97 100644 (file)
--- a/lib/MC/MCStreamer.cpp
+++ b/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),
-      CurrentW64UnwindInfo(nullptr), LastSymbol(nullptr) {
+    : Context(Ctx), CurrentW64UnwindInfo(nullptr) {
   SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
 }
 
@@ -51,10 +50,7 @@ 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();
   SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
 }
@@ -237,20 +233,12 @@ void MCStreamer::EmitLabel(MCSymbol *Symbol) {
   assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
   assert(getCurrentSection().first && "Cannot emit before setting section!");
   AssignSection(Symbol, getCurrentSection().first);
-  LastSymbol = Symbol;
 
   MCTargetStreamer *TS = getTargetStreamer();
   if (TS)
     TS->emitLabel(Symbol);
 }
 
-void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
-  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
-  assert(getCurrentSection().first && "Cannot emit before setting section!");
-  AssignSection(Symbol, getCurrentSection().first);
-  LastSymbol = Symbol;
-}
-
 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
   EnsureValidFrame();
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
@@ -259,8 +247,6 @@ 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) {
@@ -278,17 +264,6 @@ void MCStreamer::EmitCFIStartProc(bool IsSimple) {
 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
 }
 
-void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
-  // Report an error if we haven't seen a symbol yet where we'd bind
-  // .cfi_startproc.
-  if (!LastSymbol)
-    report_fatal_error("No symbol to start a frame");
-  Frame.Function = LastSymbol;
-  // We need to create a local symbol to avoid relocations.
-  Frame.Begin = getContext().CreateTempSymbol();
-  EmitLabel(Frame.Begin);
-}
-
 void MCStreamer::EmitCFIEndProc() {
   EnsureValidFrame();
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
@@ -296,11 +271,9 @@ void MCStreamer::EmitCFIEndProc() {
 }
 
 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
-}
-
-void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
-  Frame.End = getContext().CreateTempSymbol();
-  EmitLabel(Frame.End);
+  // Put a dummy non-null value in Frame.End to mark that this frame has been
+  // closed.
+  Frame.End = (MCSymbol *) 1;
 }
 
 MCSymbol *MCStreamer::EmitCFICommon() {
@@ -531,6 +504,8 @@ void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
     report_fatal_error("Frame register and offset already specified!");
   if (Offset & 0x0F)
     report_fatal_error("Misaligned frame pointer offset!");
+  if (Offset > 240)
+    report_fatal_error("Frame offset must be less than or equal to 240!");
   MCSymbol *Label = getContext().CreateTempSymbol();
   MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
   EmitLabel(Label);
@@ -594,11 +569,9 @@ void MCStreamer::EmitWin64EHEndProlog() {
 }
 
 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
-  llvm_unreachable("This file format doesn't support this directive");
 }
 
 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
-  llvm_unreachable("This file format doesn't support this directive");
 }
 
 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
@@ -615,17 +588,6 @@ void MCStreamer::EmitRawText(const Twine &T) {
   EmitRawTextImpl(T.toStringRef(Str));
 }
 
-void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
-  if (!getNumFrameInfos())
-    return;
-
-  if (EmitEHFrame)
-    MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
-
-  if (EmitDebugFrame)
-    MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
-}
-
 void MCStreamer::EmitW64Tables() {
   if (!getNumW64UnwindInfos())
     return;
@@ -645,9 +607,82 @@ void MCStreamer::Finish() {
 }
 
 void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+  visitUsedExpr(*Value);
   Symbol->setVariableValue(Value);
 
   MCTargetStreamer *TS = getTargetStreamer();
   if (TS)
     TS->emitAssignment(Symbol, Value);
 }
+
+void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+}
+
+void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
+  switch (Expr.getKind()) {
+  case MCExpr::Target:
+    cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
+    break;
+
+  case MCExpr::Constant:
+    break;
+
+  case MCExpr::Binary: {
+    const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
+    visitUsedExpr(*BE.getLHS());
+    visitUsedExpr(*BE.getRHS());
+    break;
+  }
+
+  case MCExpr::SymbolRef:
+    visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
+    break;
+
+  case MCExpr::Unary:
+    visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
+    break;
+  }
+}
+
+void MCStreamer::EmitInstruction(const MCInst &Inst,
+                                 const MCSubtargetInfo &STI) {
+  // Scan for values.
+  for (unsigned i = Inst.getNumOperands(); i--;)
+    if (Inst.getOperand(i).isExpr())
+      visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+void MCStreamer::EndCOFFSymbolDef() {}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
+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,
+                                uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
+void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+void MCStreamer::EmitBytes(StringRef Data) {}
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+                               const SMLoc &Loc) {
+  visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+                                      unsigned ValueSize,
+                                      unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+                                   unsigned MaxBytesToEmit) {}
+bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
+  return false;
+}
+void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
+void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
+void MCStreamer::FinishImpl() {}
+void MCStreamer::EmitBundleUnlock() {}