Merge commit '10251753b6897adcd22cc981c0cc42f348c109de' into merge-20130807

Conflicts:
	lib/Archive/ArchiveReader.cpp
	lib/Support/Unix/PathV2.inc

Change-Id: I29d8c1e321a4a380b6013f00bac6a8e4b593cc4e

1 files changed, 27 insertions, 18 deletions

diff --git a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index 679d3c4..6b98205 100644
--- a/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -109,18 +109,17 @@ public:
   /// This is one of the functions used to emit data into an ELF section, so the
   /// ARM streamer overrides it to add the appropriate mapping symbol ($d) if
   /// necessary.
-  virtual void EmitBytes(StringRef Data, unsigned AddrSpace) {
+  virtual void EmitBytes(StringRef Data) {
     EmitDataMappingSymbol();
-    MCELFStreamer::EmitBytes(Data, AddrSpace);
+    MCELFStreamer::EmitBytes(Data);
   }
 
   /// This is one of the functions used to emit data into an ELF section, so the
   /// ARM streamer overrides it to add the appropriate mapping symbol ($d) if
   /// necessary.
-  virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
-                             unsigned AddrSpace) {
+  virtual void EmitValueImpl(const MCExpr *Value, unsigned Size) {
     EmitDataMappingSymbol();
-    MCELFStreamer::EmitValueImpl(Value, Size, AddrSpace);
+    MCELFStreamer::EmitValueImpl(Value, Size);
   }
 
   virtual void EmitAssemblerFlag(MCAssemblerFlag Flag) {
@@ -204,7 +203,7 @@ private:
 
   void EmitPersonalityFixup(StringRef Name);
   void FlushPendingOffset();
-  void FlushUnwindOpcodes(bool AllowCompactModel0);
+  void FlushUnwindOpcodes(bool NoHandlerData);
 
   void SwitchToEHSection(const char *Prefix, unsigned Type, unsigned Flags,
                          SectionKind Kind, const MCSymbol &Fn);
@@ -336,17 +335,17 @@ void ARMELFStreamer::EmitFnEnd() {
                             MCSymbolRefExpr::VK_ARM_PREL31,
                             getContext());
 
-  EmitValue(FnStartRef, 4, 0);
+  EmitValue(FnStartRef, 4);
 
   if (CantUnwind) {
-    EmitIntValue(EXIDX_CANTUNWIND, 4, 0);
+    EmitIntValue(EXIDX_CANTUNWIND, 4);
   } else if (ExTab) {
     // Emit a reference to the unwind opcodes in the ".ARM.extab" section.
     const MCSymbolRefExpr *ExTabEntryRef =
       MCSymbolRefExpr::Create(ExTab,
                               MCSymbolRefExpr::VK_ARM_PREL31,
                               getContext());
-    EmitValue(ExTabEntryRef, 4, 0);
+    EmitValue(ExTabEntryRef, 4);
   } else {
     // For the __aeabi_unwind_cpp_pr0, we have to emit the unwind opcodes in
     // the second word of exception index table entry.  The size of the unwind
@@ -356,7 +355,7 @@ void ARMELFStreamer::EmitFnEnd() {
     assert(Opcodes.size() == 4u &&
            "Unwind opcode size for __aeabi_cpp_unwind_pr0 must be equal to 4");
     EmitBytes(StringRef(reinterpret_cast<const char*>(Opcodes.data()),
-                        Opcodes.size()), 0);
+                        Opcodes.size()));
   }
 
   // Switch to the section containing FnStart
@@ -377,13 +376,13 @@ void ARMELFStreamer::FlushPendingOffset() {
   }
 }
 
-void ARMELFStreamer::FlushUnwindOpcodes(bool AllowCompactModel0) {
+void ARMELFStreamer::FlushUnwindOpcodes(bool NoHandlerData) {
   // Emit the unwind opcode to restore $sp.
   if (UsedFP) {
-    const MCRegisterInfo &MRI = getContext().getRegisterInfo();
+    const MCRegisterInfo *MRI = getContext().getRegisterInfo();
     int64_t LastRegSaveSPOffset = SPOffset - PendingOffset;
     UnwindOpAsm.EmitSPOffset(LastRegSaveSPOffset - FPOffset);
-    UnwindOpAsm.EmitSetSP(MRI.getEncodingValue(FPReg));
+    UnwindOpAsm.EmitSetSP(MRI->getEncodingValue(FPReg));
   } else {
     FlushPendingOffset();
   }
@@ -394,7 +393,7 @@ void ARMELFStreamer::FlushUnwindOpcodes(bool AllowCompactModel0) {
   // For compact model 0, we have to emit the unwind opcodes in the .ARM.exidx
   // section.  Thus, we don't have to create an entry in the .ARM.extab
   // section.
-  if (AllowCompactModel0 && PersonalityIndex == AEABI_UNWIND_CPP_PR0)
+  if (NoHandlerData && PersonalityIndex == AEABI_UNWIND_CPP_PR0)
     return;
 
   // Switch to .ARM.extab section.
@@ -412,12 +411,22 @@ void ARMELFStreamer::FlushUnwindOpcodes(bool AllowCompactModel0) {
                               MCSymbolRefExpr::VK_ARM_PREL31,
                               getContext());
 
-    EmitValue(PersonalityRef, 4, 0);
+    EmitValue(PersonalityRef, 4);
   }
 
   // Emit unwind opcodes
   EmitBytes(StringRef(reinterpret_cast<const char *>(Opcodes.data()),
-                      Opcodes.size()), 0);
+                      Opcodes.size()));
+
+  // According to ARM EHABI section 9.2, if the __aeabi_unwind_cpp_pr1() or
+  // __aeabi_unwind_cpp_pr2() is used, then the handler data must be emitted
+  // after the unwind opcodes.  The handler data consists of several 32-bit
+  // words, and should be terminated by zero.
+  //
+  // In case that the .handlerdata directive is not specified by the
+  // programmer, we should emit zero to terminate the handler data.
+  if (NoHandlerData && !Personality)
+    EmitIntValue(0, 4);
 }
 
 void ARMELFStreamer::EmitHandlerData() {
@@ -458,9 +467,9 @@ void ARMELFStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList,
   // Collect the registers in the register list
   unsigned Count = 0;
   uint32_t Mask = 0;
-  const MCRegisterInfo &MRI = getContext().getRegisterInfo();
+  const MCRegisterInfo *MRI = getContext().getRegisterInfo();
   for (size_t i = 0; i < RegList.size(); ++i) {
-    unsigned Reg = MRI.getEncodingValue(RegList[i]);
+    unsigned Reg = MRI->getEncodingValue(RegList[i]);
     assert(Reg < (IsVector ? 32U : 16U) && "Register out of range");
     unsigned Bit = (1u << Reg);
     if ((Mask & Bit) == 0) {