[ShrinkWrap] Add (a simplified version) of shrink-wrapping.

[oota-llvm.git] / lib / Target / X86 / X86AsmPrinter.cpp

diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp
index f6033a7e15713666ba40f37a59081b431608244a..ab933fe39b9475b9acd9d18f18daf5984349831f 100644 (file)
--- a/lib/Target/X86/X86AsmPrinter.cpp
+++ b/lib/Target/X86/X86AsmPrinter.cpp
@@ -55,12 +55,12 @@ bool X86AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
 
   if (Subtarget->isTargetCOFF()) {
     bool Intrn = MF.getFunction()->hasInternalLinkage();
-    OutStreamer.BeginCOFFSymbolDef(CurrentFnSym);
-    OutStreamer.EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC
-                                              : COFF::IMAGE_SYM_CLASS_EXTERNAL);
-    OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
+    OutStreamer->BeginCOFFSymbolDef(CurrentFnSym);
+    OutStreamer->EmitCOFFSymbolStorageClass(Intrn ? COFF::IMAGE_SYM_CLASS_STATIC
+                                            : COFF::IMAGE_SYM_CLASS_EXTERNAL);
+    OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_FUNCTION
                                                << COFF::SCT_COMPLEX_TYPE_SHIFT);
-    OutStreamer.EndCOFFSymbolDef();
+    OutStreamer->EndCOFFSymbolDef();
   }
 
   // Emit the rest of the function body.
@@ -507,25 +507,24 @@ void X86AsmPrinter::EmitStartOfAsmFile(Module &M) {
   Triple TT(TM.getTargetTriple());
 
   if (TT.isOSBinFormatMachO())
-    OutStreamer.SwitchSection(getObjFileLowering().getTextSection());
+    OutStreamer->SwitchSection(getObjFileLowering().getTextSection());
 
   if (TT.isOSBinFormatCOFF()) {
     // Emit an absolute @feat.00 symbol.  This appears to be some kind of
     // compiler features bitfield read by link.exe.
     if (TT.getArch() == Triple::x86) {
       MCSymbol *S = MMI->getContext().GetOrCreateSymbol(StringRef("@feat.00"));
-      OutStreamer.BeginCOFFSymbolDef(S);
-      OutStreamer.EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_STATIC);
-      OutStreamer.EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_NULL);
-      OutStreamer.EndCOFFSymbolDef();
+      OutStreamer->BeginCOFFSymbolDef(S);
+      OutStreamer->EmitCOFFSymbolStorageClass(COFF::IMAGE_SYM_CLASS_STATIC);
+      OutStreamer->EmitCOFFSymbolType(COFF::IMAGE_SYM_DTYPE_NULL);
+      OutStreamer->EndCOFFSymbolDef();
       // According to the PE-COFF spec, the LSB of this value marks the object
       // for "registered SEH".  This means that all SEH handler entry points
       // must be registered in .sxdata.  Use of any unregistered handlers will
       // cause the process to terminate immediately.  LLVM does not know how to
       // register any SEH handlers, so its object files should be safe.
-      S->setAbsolute();
-      OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
-      OutStreamer.EmitAssignment(
+      OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
+      OutStreamer->EmitAssignment(
           S, MCConstantExpr::Create(int64_t(1), MMI->getContext()));
     }
   }
@@ -565,7 +564,7 @@ MCSymbol *X86AsmPrinter::GetCPISymbol(unsigned CPID) const {
             getObjFileLowering().getSectionForConstant(Kind, C))) {
         if (MCSymbol *Sym = S->getCOMDATSymbol()) {
           if (Sym->isUndefined())
-            OutStreamer.EmitSymbolAttribute(Sym, MCSA_Global);
+            OutStreamer->EmitSymbolAttribute(Sym, MCSA_Global);
           return Sym;
         }
       }
@@ -600,7 +599,7 @@ void X86AsmPrinter::GenerateExportDirective(const MCSymbol *Sym, bool IsData) {
   }
 
   OS.flush();
-  OutStreamer.EmitBytes(Directive);
+  OutStreamer->EmitBytes(Directive);
 }
 
 void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
@@ -622,21 +621,21 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
                                    MachO::S_ATTR_SELF_MODIFYING_CODE |
                                    MachO::S_ATTR_PURE_INSTRUCTIONS,
                                    5, SectionKind::getMetadata());
-      OutStreamer.SwitchSection(TheSection);
+      OutStreamer->SwitchSection(TheSection);
 
       for (const auto &Stub : Stubs) {
         // L_foo$stub:
-        OutStreamer.EmitLabel(Stub.first);
+        OutStreamer->EmitLabel(Stub.first);
         //   .indirect_symbol _foo
-        OutStreamer.EmitSymbolAttribute(Stub.second.getPointer(),
-                                        MCSA_IndirectSymbol);
+        OutStreamer->EmitSymbolAttribute(Stub.second.getPointer(),
+                                         MCSA_IndirectSymbol);
         // hlt; hlt; hlt; hlt; hlt     hlt = 0xf4.
         const char HltInsts[] = "\xf4\xf4\xf4\xf4\xf4";
-        OutStreamer.EmitBytes(StringRef(HltInsts, 5));
+        OutStreamer->EmitBytes(StringRef(HltInsts, 5));
       }
 
       Stubs.clear();
-      OutStreamer.AddBlankLine();
+      OutStreamer->AddBlankLine();
     }
 
     // Output stubs for external and common global variables.
@@ -646,13 +645,13 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
         OutContext.getMachOSection("__IMPORT", "__pointers",
                                    MachO::S_NON_LAZY_SYMBOL_POINTERS,
                                    SectionKind::getMetadata());
-      OutStreamer.SwitchSection(TheSection);
+      OutStreamer->SwitchSection(TheSection);
 
       for (auto &Stub : Stubs)
-        emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
+        emitNonLazySymbolPointer(*OutStreamer, Stub.first, Stub.second);
 
       Stubs.clear();
-      OutStreamer.AddBlankLine();
+      OutStreamer->AddBlankLine();
     }
 
     Stubs = MMIMacho.GetHiddenGVStubList();
@@ -661,13 +660,13 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
         OutContext.getMachOSection("__IMPORT", "__pointers",
                                    MachO::S_NON_LAZY_SYMBOL_POINTERS,
                                    SectionKind::getMetadata());
-      OutStreamer.SwitchSection(TheSection);
+      OutStreamer->SwitchSection(TheSection);
 
       for (auto &Stub : Stubs)
-        emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second);
+        emitNonLazySymbolPointer(*OutStreamer, Stub.first, Stub.second);
 
       Stubs.clear();
-      OutStreamer.AddBlankLine();
+      OutStreamer->AddBlankLine();
     }
 
     SM.serializeToStackMapSection();
@@ -677,14 +676,14 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
     // implementation of multiple entry points).  If this doesn't occur, the
     // linker can safely perform dead code stripping.  Since LLVM never
     // generates code that does this, it is always safe to set.
-    OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
+    OutStreamer->EmitAssemblerFlag(MCAF_SubsectionsViaSymbols);
   }
 
   if (TT.isKnownWindowsMSVCEnvironment() && MMI->usesVAFloatArgument()) {
     StringRef SymbolName =
         (TT.getArch() == Triple::x86_64) ? "_fltused" : "__fltused";
     MCSymbol *S = MMI->getContext().GetOrCreateSymbol(SymbolName);
-    OutStreamer.EmitSymbolAttribute(S, MCSA_Global);
+    OutStreamer->EmitSymbolAttribute(S, MCSA_Global);
   }
 
   if (TT.isOSBinFormatCOFF()) {
@@ -714,7 +713,7 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
       const TargetLoweringObjectFileCOFF &TLOFCOFF =
         static_cast<const TargetLoweringObjectFileCOFF&>(getObjFileLowering());
 
-      OutStreamer.SwitchSection(TLOFCOFF.getDrectveSection());
+      OutStreamer->SwitchSection(TLOFCOFF.getDrectveSection());
 
       for (auto & Symbol : DLLExportedGlobals)
         GenerateExportDirective(Symbol, /*IsData=*/true);
@@ -723,28 +722,8 @@ void X86AsmPrinter::EmitEndOfAsmFile(Module &M) {
     }
   }
 
-  if (TT.isOSBinFormatELF()) {
-    const TargetLoweringObjectFileELF &TLOFELF =
-      static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
-
-    MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
-
-    // Output stubs for external and common global variables.
-    MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
-    if (!Stubs.empty()) {
-      OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
-      const DataLayout *TD = TM.getDataLayout();
-
-      for (const auto &Stub : Stubs) {
-        OutStreamer.EmitLabel(Stub.first);
-        OutStreamer.EmitSymbolValue(Stub.second.getPointer(),
-                                    TD->getPointerSize());
-      }
-      Stubs.clear();
-    }
-
+  if (TT.isOSBinFormatELF())
     SM.serializeToStackMapSection();
-  }
 }
 
 //===----------------------------------------------------------------------===//