[Mips] Add a target streamer when creating a null streamer.

Should fix DebugInfo/global.ll on the mips bot.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211527 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/MCTargetDesc/MipsMCTargetDesc.cpp

@@ -133,6 +133,12 @@ createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
   return S;
 }
 
+static MCStreamer *createMipsNullStreamer(MCContext &Ctx) {
+  MCStreamer *S = llvm::createNullStreamer(Ctx);
+  new MipsTargetStreamer(*S);
+  return S;
+}
+
 extern "C" void LLVMInitializeMipsTargetMC() {
   // Register the MC asm info.
   RegisterMCAsmInfoFn X(TheMipsTarget, createMipsMCAsmInfo);
@@ -187,6 +193,12 @@ extern "C" void LLVMInitializeMipsTargetMC() {
   TargetRegistry::RegisterAsmStreamer(TheMips64Target, createMCAsmStreamer);
   TargetRegistry::RegisterAsmStreamer(TheMips64elTarget, createMCAsmStreamer);
 
+  TargetRegistry::RegisterNullStreamer(TheMipsTarget, createMipsNullStreamer);
+  TargetRegistry::RegisterNullStreamer(TheMipselTarget, createMipsNullStreamer);
+  TargetRegistry::RegisterNullStreamer(TheMips64Target, createMipsNullStreamer);
+  TargetRegistry::RegisterNullStreamer(TheMips64elTarget,
+                                       createMipsNullStreamer);
+
   // Register the asm backend.
   TargetRegistry::RegisterMCAsmBackend(TheMipsTarget,
                                        createMipsAsmBackendEB32);

lib/Target/Mips/MCTargetDesc/MipsTargetStreamer.cpp

@@ -27,10 +27,37 @@
 
 using namespace llvm;
 
-// Pin vtable to this file.
-void MipsTargetStreamer::anchor() {}
-
 MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
+void MipsTargetStreamer::emitDirectiveSetMicroMips() {}
+void MipsTargetStreamer::emitDirectiveSetNoMicroMips() {}
+void MipsTargetStreamer::emitDirectiveSetMips16() {}
+void MipsTargetStreamer::emitDirectiveSetNoMips16() {}
+void MipsTargetStreamer::emitDirectiveSetReorder() {}
+void MipsTargetStreamer::emitDirectiveSetNoReorder() {}
+void MipsTargetStreamer::emitDirectiveSetMacro() {}
+void MipsTargetStreamer::emitDirectiveSetNoMacro() {}
+void MipsTargetStreamer::emitDirectiveSetAt() {}
+void MipsTargetStreamer::emitDirectiveSetNoAt() {}
+void MipsTargetStreamer::emitDirectiveEnd(StringRef Name) {}
+void MipsTargetStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {}
+void MipsTargetStreamer::emitDirectiveAbiCalls() {}
+void MipsTargetStreamer::emitDirectiveNaN2008() {}
+void MipsTargetStreamer::emitDirectiveNaNLegacy() {}
+void MipsTargetStreamer::emitDirectiveOptionPic0() {}
+void MipsTargetStreamer::emitDirectiveOptionPic2() {}
+void MipsTargetStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
+                                   unsigned ReturnReg) {}
+void MipsTargetStreamer::emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) {}
+void MipsTargetStreamer::emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) {
+}
+void MipsTargetStreamer::emitDirectiveSetMips32R2() {}
+void MipsTargetStreamer::emitDirectiveSetMips64() {}
+void MipsTargetStreamer::emitDirectiveSetMips64R2() {}
+void MipsTargetStreamer::emitDirectiveSetDsp() {}
+void MipsTargetStreamer::emitDirectiveCpload(unsigned RegNo) {}
+void MipsTargetStreamer::emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
+                                              const MCSymbol &Sym, bool IsReg) {
+}
 
 MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
                                              formatted_raw_ostream &OS)

lib/Target/Mips/MipsTargetStreamer.h

@@ -15,43 +15,41 @@
 
 namespace llvm {
 class MipsTargetStreamer : public MCTargetStreamer {
-  virtual void anchor();
-
 public:
   MipsTargetStreamer(MCStreamer &S);
-  virtual void emitDirectiveSetMicroMips() = 0;
-  virtual void emitDirectiveSetNoMicroMips() = 0;
-  virtual void emitDirectiveSetMips16() = 0;
-  virtual void emitDirectiveSetNoMips16() = 0;
+  virtual void emitDirectiveSetMicroMips();
+  virtual void emitDirectiveSetNoMicroMips();
+  virtual void emitDirectiveSetMips16();
+  virtual void emitDirectiveSetNoMips16();
 
-  virtual void emitDirectiveSetReorder() = 0;
-  virtual void emitDirectiveSetNoReorder() = 0;
-  virtual void emitDirectiveSetMacro() = 0;
-  virtual void emitDirectiveSetNoMacro() = 0;
-  virtual void emitDirectiveSetAt() = 0;
-  virtual void emitDirectiveSetNoAt() = 0;
-  virtual void emitDirectiveEnd(StringRef Name) = 0;
+  virtual void emitDirectiveSetReorder();
+  virtual void emitDirectiveSetNoReorder();
+  virtual void emitDirectiveSetMacro();
+  virtual void emitDirectiveSetNoMacro();
+  virtual void emitDirectiveSetAt();
+  virtual void emitDirectiveSetNoAt();
+  virtual void emitDirectiveEnd(StringRef Name);
 
-  virtual void emitDirectiveEnt(const MCSymbol &Symbol) = 0;
-  virtual void emitDirectiveAbiCalls() = 0;
-  virtual void emitDirectiveNaN2008() = 0;
-  virtual void emitDirectiveNaNLegacy() = 0;
-  virtual void emitDirectiveOptionPic0() = 0;
-  virtual void emitDirectiveOptionPic2() = 0;
+  virtual void emitDirectiveEnt(const MCSymbol &Symbol);
+  virtual void emitDirectiveAbiCalls();
+  virtual void emitDirectiveNaN2008();
+  virtual void emitDirectiveNaNLegacy();
+  virtual void emitDirectiveOptionPic0();
+  virtual void emitDirectiveOptionPic2();
   virtual void emitFrame(unsigned StackReg, unsigned StackSize,
-                         unsigned ReturnReg) = 0;
-  virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff) = 0;
-  virtual void emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff) = 0;
+                         unsigned ReturnReg);
+  virtual void emitMask(unsigned CPUBitmask, int CPUTopSavedRegOff);
+  virtual void emitFMask(unsigned FPUBitmask, int FPUTopSavedRegOff);
 
-  virtual void emitDirectiveSetMips32R2() = 0;
-  virtual void emitDirectiveSetMips64() = 0;
-  virtual void emitDirectiveSetMips64R2() = 0;
-  virtual void emitDirectiveSetDsp() = 0;
+  virtual void emitDirectiveSetMips32R2();
+  virtual void emitDirectiveSetMips64();
+  virtual void emitDirectiveSetMips64R2();
+  virtual void emitDirectiveSetDsp();
 
   // PIC support
-  virtual void emitDirectiveCpload(unsigned RegNo) = 0;
+  virtual void emitDirectiveCpload(unsigned RegNo);
   virtual void emitDirectiveCpsetup(unsigned RegNo, int RegOrOffset,
-                                    const MCSymbol &Sym, bool IsReg) = 0;
+                                    const MCSymbol &Sym, bool IsReg);
 };
 
 // This part is for ascii assembly output

test/CodeGen/Mips/null-streamer.ll

@@ -0,0 +1,7 @@
+; Test the null streamer with a terget streamer.
+; RUN: llc -O0 -filetype=null -mtriple=mips-linux < %s
+
+define i32 @main()  {
+entry:
+  ret i32 0
+}