1 files changed, 19 insertions, 23 deletions
diff --git a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
index 09fdb9c..e63036c 100644
--- a/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
+++ b/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp
@@ -27,6 +27,12 @@
 #include "llvm/Support/Host.h"
 #include "llvm/Support/TargetRegistry.h"
 
+#if _MSC_VER
+#include <intrin.h>
+#endif
+
+using namespace llvm;
+
 #define GET_REGINFO_MC_DESC
 #include "X86GenRegisterInfo.inc"
 
@@ -36,13 +42,6 @@
 #define GET_SUBTARGETINFO_MC_DESC
 #include "X86GenSubtargetInfo.inc"
 
-#if _MSC_VER
-#include <intrin.h>
-#endif
-
-using namespace llvm;
-
-
 std::string X86_MC::ParseX86Triple(StringRef TT) {
   Triple TheTriple(TT);
   std::string FS;
@@ -230,14 +229,8 @@ MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(StringRef TT, StringRef CPU,
   }
 
   std::string CPUName = CPU;
-  if (CPUName.empty()) {
-#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)\
-    || defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
-    CPUName = sys::getHostCPUName();
-#else
+  if (CPUName.empty())
     CPUName = "generic";
-#endif
-  }
 
   MCSubtargetInfo *X = new MCSubtargetInfo();
   InitX86MCSubtargetInfo(X, TT, CPUName, ArchFS);
@@ -294,13 +287,13 @@ static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
   // Initial state of the frame pointer is esp+stackGrowth.
   unsigned StackPtr = is64Bit ? X86::RSP : X86::ESP;
   MCCFIInstruction Inst = MCCFIInstruction::createDefCfa(
-      0, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth);
+      nullptr, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth);
   MAI->addInitialFrameState(Inst);
 
   // Add return address to move list
   unsigned InstPtr = is64Bit ? X86::RIP : X86::EIP;
   MCCFIInstruction Inst2 = MCCFIInstruction::createOffset(
-      0, MRI.getDwarfRegNum(InstPtr, true), stackGrowth);
+      nullptr, MRI.getDwarfRegNum(InstPtr, true), stackGrowth);
   MAI->addInitialFrameState(Inst2);
 
   return MAI;
@@ -365,13 +358,16 @@ static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
                                     bool NoExecStack) {
   Triple TheTriple(TT);
 
-  if (TheTriple.isOSBinFormatMachO())
+  switch (TheTriple.getObjectFormat()) {
+  default: llvm_unreachable("unsupported object format");
+  case Triple::MachO:
     return createMachOStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll);
-
-  if (TheTriple.isOSWindows() && !TheTriple.isOSBinFormatELF())
-    return createWinCOFFStreamer(Ctx, MAB, *_Emitter, _OS, RelaxAll);
-
-  return createELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll, NoExecStack);
+  case Triple::COFF:
+    assert(TheTriple.isOSWindows() && "only Windows COFF is supported");
+    return createX86WinCOFFStreamer(Ctx, MAB, _Emitter, _OS, RelaxAll);
+  case Triple::ELF:
+    return createELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll, NoExecStack);
+  }
 }
 
 static MCInstPrinter *createX86MCInstPrinter(const Target &T,
@@ -384,7 +380,7 @@ static MCInstPrinter *createX86MCInstPrinter(const Target &T,
     return new X86ATTInstPrinter(MAI, MII, MRI);
   if (SyntaxVariant == 1)
     return new X86IntelInstPrinter(MAI, MII, MRI);
-  return 0;
+  return nullptr;
 }
 
 static MCRelocationInfo *createX86MCRelocationInfo(StringRef TT,