Untangle a snarl that I discovered when updating the mangler,

starting in getCurrentFunctionEHName.  Among other problems,
we would try to privative a "foo.eh" label, but end up emitting
the label as _Lfoo.eh instead of L_foo.eh on darwin.  This is really
bad, and the linker has always tolerated these labels existing.
For now, just emit them as _foo.eh.

This patch also fixes problems with ".eh" labels on unnamed
functions and eliminates two strangely defined TargetAsmInfo
hooks.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76231 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 7 insertions, 15 deletions

diff --git a/include/llvm/CodeGen/AsmPrinter.h b/include/llvm/CodeGen/AsmPrinter.h
index a9b0b3b..fcedef2 100644
--- a/include/llvm/CodeGen/AsmPrinter.h
+++ b/include/llvm/CodeGen/AsmPrinter.h
@@ -170,11 +170,9 @@ namespace llvm {
     /// Should be overridden if an indirect reference should be used.
     virtual void EmitExternalGlobal(const GlobalVariable *GV);
 
-    /// getCurrentFunctionEHName - Called to return (and cache) the
-    /// CurrentFnEHName.
+    /// getCurrentFunctionEHName - Called to return the CurrentFnEHName.
     /// 
-    const std::string &getCurrentFunctionEHName(const MachineFunction *MF,
-                                                std::string &FuncEHName) const;
+    std::string getCurrentFunctionEHName(const MachineFunction *MF) const;
 
   protected:
     /// getAnalysisUsage - Record analysis usage.
diff --git a/include/llvm/Target/TargetAsmInfo.h b/include/llvm/Target/TargetAsmInfo.h
index 721edfd..3604e9a 100644
--- a/include/llvm/Target/TargetAsmInfo.h
+++ b/include/llvm/Target/TargetAsmInfo.h
@@ -480,9 +480,9 @@ namespace llvm {
     /// encode inline subroutine information.
     bool DwarfUsesInlineInfoSection; // Defaults to false.
 
-    /// NonLocalEHFrameLabel - If set, the EH_frame label needs to be non-local.
-    ///
-    bool NonLocalEHFrameLabel;              // Defaults to false.
+    /// Is_EHSymbolPrivate - If set, the "_foo.eh" is made private so that it
+    /// doesn't show up in the symbol table of the object file.
+    bool Is_EHSymbolPrivate;                // Defaults to true.
 
     /// GlobalEHDirective - This is the directive used to make exception frame
     /// tables globally visible.
@@ -714,12 +714,6 @@ namespace llvm {
     const char *getPrivateGlobalPrefix() const {
       return PrivateGlobalPrefix;
     }
-    /// EHGlobalPrefix - Prefix for EH_frame and the .eh symbols.
-    /// This is normally PrivateGlobalPrefix, but some targets want
-    /// these symbols to be visible.
-    virtual const char *getEHGlobalPrefix() const {
-      return PrivateGlobalPrefix;
-    }
     const char *getLessPrivateGlobalPrefix() const {
       return LessPrivateGlobalPrefix;
     }
@@ -876,8 +870,8 @@ namespace llvm {
     bool doesDwarfUsesInlineInfoSection() const {
       return DwarfUsesInlineInfoSection;
     }
-    bool doesRequireNonLocalEHFrameLabel() const {
-      return NonLocalEHFrameLabel;
+    bool is_EHSymbolPrivate() const {
+      return Is_EHSymbolPrivate;
     }
     const char *getGlobalEHDirective() const {
       return GlobalEHDirective;