3 files changed, 28 insertions, 21 deletions

diff --git a/include/llvm/MC/MCAsmInfo.h b/include/llvm/MC/MCAsmInfo.h
index 9cfd004..0bf364a 100644
--- a/include/llvm/MC/MCAsmInfo.h
+++ b/include/llvm/MC/MCAsmInfo.h
@@ -246,6 +246,11 @@ namespace llvm {
     /// declare a symbol as having hidden visibility.
     MCSymbolAttr HiddenVisibilityAttr;       // Defaults to MCSA_Hidden.
 
+    /// HiddenDeclarationVisibilityAttr - This attribute, if not MCSA_Invalid,
+    /// is used to declare an undefined symbol as having hidden visibility.
+    MCSymbolAttr HiddenDeclarationVisibilityAttr;   // Defaults to MCSA_Hidden.
+
+
     /// ProtectedVisibilityAttr - This attribute, if not MCSA_Invalid, is used
     /// to declare a symbol as having protected visibility.
     MCSymbolAttr ProtectedVisibilityAttr;    // Defaults to MCSA_Protected
@@ -425,6 +430,9 @@ namespace llvm {
     const char *getLinkOnceDirective() const { return LinkOnceDirective; }
 
     MCSymbolAttr getHiddenVisibilityAttr() const { return HiddenVisibilityAttr;}
+    MCSymbolAttr getHiddenDeclarationVisibilityAttr() const {
+      return HiddenDeclarationVisibilityAttr;
+    }
     MCSymbolAttr getProtectedVisibilityAttr() const {
       return ProtectedVisibilityAttr;
     }
diff --git a/include/llvm/MC/MCParser/MCAsmParserExtension.h b/include/llvm/MC/MCParser/MCAsmParserExtension.h
index 95184cd..ceb57f5 100644
--- a/include/llvm/MC/MCParser/MCAsmParserExtension.h
+++ b/include/llvm/MC/MCParser/MCAsmParserExtension.h
@@ -38,6 +38,8 @@ protected:
     return (Obj->*Handler)(Directive, DirectiveLoc);
   }
 
+  bool BracketExpressionsSupported;
+
 public:
   virtual ~MCAsmParserExtension();
 
@@ -68,6 +70,8 @@ public:
 
   const AsmToken &getTok() { return getParser().getTok(); }
 
+  bool HasBracketExpressions() const { return BracketExpressionsSupported; }
+
   /// @}
 };
 
diff --git a/include/llvm/MC/MCStreamer.h b/include/llvm/MC/MCStreamer.h
index fc2451f..4451199 100644
--- a/include/llvm/MC/MCStreamer.h
+++ b/include/llvm/MC/MCStreamer.h
@@ -57,13 +57,10 @@ namespace llvm {
     MCDwarfFrameInfo *getCurrentFrameInfo();
     void EnsureValidFrame();
 
-    /// CurSectionStack - This is stack of CurSection values saved by
-    /// PushSection.
-    SmallVector<const MCSection *, 4> CurSectionStack;
-
-    /// PrevSectionStack - This is stack of PrevSection values saved by
-    /// PushSection.
-    SmallVector<const MCSection *, 4> PrevSectionStack;
+    /// SectionStack - This is stack of current and previous section
+    /// values saved by PushSection.
+    SmallVector<std::pair<const MCSection *,
+                const MCSection *>, 4> SectionStack;
 
   protected:
     MCStreamer(MCContext &Ctx);
@@ -117,16 +114,16 @@ namespace llvm {
     /// getCurrentSection - Return the current section that the streamer is
     /// emitting code to.
     const MCSection *getCurrentSection() const {
-      if (!CurSectionStack.empty())
-        return CurSectionStack.back();
+      if (!SectionStack.empty())
+        return SectionStack.back().first;
       return NULL;
     }
 
     /// getPreviousSection - Return the previous section that the streamer is
     /// emitting code to.
     const MCSection *getPreviousSection() const {
-      if (!PrevSectionStack.empty())
-        return PrevSectionStack.back();
+      if (!SectionStack.empty())
+        return SectionStack.back().second;
       return NULL;
     }
 
@@ -139,8 +136,8 @@ namespace llvm {
     /// pushSection - Save the current and previous section on the
     /// section stack.
     void PushSection() {
-      PrevSectionStack.push_back(getPreviousSection());
-      CurSectionStack.push_back(getCurrentSection());
+      SectionStack.push_back(std::make_pair(getCurrentSection(),
+                                            getPreviousSection()));
     }
 
     /// popSection - Restore the current and previous section from
@@ -148,12 +145,10 @@ namespace llvm {
     ///
     /// Returns false if the stack was empty.
     bool PopSection() {
-      if (PrevSectionStack.size() <= 1)
+      if (SectionStack.size() <= 1)
         return false;
-      assert(CurSectionStack.size() > 1);
-      PrevSectionStack.pop_back();
-      const MCSection *oldSection = CurSectionStack.pop_back_val();
-      const MCSection *curSection = CurSectionStack.back();
+      const MCSection *oldSection = SectionStack.pop_back_val().first;
+      const MCSection *curSection = SectionStack.back().first;
 
       if (oldSection != curSection)
         ChangeSection(curSection);
@@ -166,10 +161,10 @@ namespace llvm {
     /// This corresponds to assembler directives like .section, .text, etc.
     void SwitchSection(const MCSection *Section) {
       assert(Section && "Cannot switch to a null section!");
-      const MCSection *curSection = CurSectionStack.back();
-      PrevSectionStack.back() = curSection;
+      const MCSection *curSection = SectionStack.back().first;
+      SectionStack.back().second = curSection;
       if (Section != curSection) {
-        CurSectionStack.back() = Section;
+        SectionStack.back().first = Section;
         ChangeSection(Section);
       }
     }