commit e2cf37b88c089a71727b3ecd466856f0cd638813
author Chris Lattner <sabre@nondot.org> Fri Jul 17 20:46:40 2009 +0000
committer Chris Lattner <sabre@nondot.org> Fri Jul 17 20:46:40 2009 +0000
tree 5519e3da8fc3474c49728b80a86d5c9f76f57db2
parent 092a9dda2d13918a6410db26f41c7b5aa97ff989

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

lib/CodeGen/AsmPrinter/AsmPrinter.cpp

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 7a5d24c..e352922 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -264,17 +264,11 @@
   return false;
 }
 
-const std::string &
-AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF,
-                                     std::string &Name) const {
+std::string 
+AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
   assert(MF && "No machine function?");
-  Name = MF->getFunction()->getName();
-  if (Name.empty())
-    Name = Mang->getMangledName(MF->getFunction());
-  
-  // FIXME: THIS SEEMS REALLY WRONG, it will get two prefixes.
-  Name = Mang->makeNameProper(TAI->getEHGlobalPrefix() + Name + ".eh");
-  return Name;
+  return Mang->getMangledName(MF->getFunction(), ".eh",
+                              TAI->is_EHSymbolPrivate());
 }
 
 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {

lib/CodeGen/AsmPrinter/DwarfException.cpp

diff --git a/lib/CodeGen/AsmPrinter/DwarfException.cpp b/lib/CodeGen/AsmPrinter/DwarfException.cpp
index 37466ab..b17b163 100644
--- a/lib/CodeGen/AsmPrinter/DwarfException.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfException.cpp
@@ -57,8 +57,8 @@
   // Begin eh frame section.
   Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
 
-  if (!TAI->doesRequireNonLocalEHFrameLabel())
-    O << TAI->getEHGlobalPrefix();
+  if (TAI->is_EHSymbolPrivate())
+    O << TAI->getPrivateGlobalPrefix();
 
   O << "EH_frame" << Index << ":\n";
   EmitLabel("section_eh_frame", Index);
@@ -194,7 +194,8 @@
 
     EmitLabel("eh_frame_begin", EHFrameInfo.Number);
 
-    if (TAI->doesRequireNonLocalEHFrameLabel()) {
+    if (!TAI->is_EHSymbolPrivate()) {
+// FIXME: HOW ARE THESE TWO ARMS DIFFERENT??  EH_frame vs eh_frame_common?
       PrintRelDirective(true, true);
       PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
 
@@ -690,9 +691,8 @@
     EmitExceptionTable();
 
     // Save EH frame information
-    std::string Name;
     EHFrames.push_back(
-        FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF, Name),
+        FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
                             SubprogramCount,
                             MMI->getPersonalityIndex(),
                             MF->getFrameInfo()->hasCalls(),

lib/Target/DarwinTargetAsmInfo.cpp

diff --git a/lib/Target/DarwinTargetAsmInfo.cpp b/lib/Target/DarwinTargetAsmInfo.cpp
index 7ab3967..3eb3d53 100644
--- a/lib/Target/DarwinTargetAsmInfo.cpp
+++ b/lib/Target/DarwinTargetAsmInfo.cpp
@@ -86,6 +86,11 @@
     StaticDtorsSection = ".mod_term_func";
   }
     
+  // _foo.eh symbols are currently always exported so that the linker knows
+  // about them.  This may not strictly be necessary on 10.6 and later, but it
+  // doesn't hurt anything.
+  Is_EHSymbolPrivate = false;
+    
   DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
   DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
   DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";

lib/Target/TargetAsmInfo.cpp

diff --git a/lib/Target/TargetAsmInfo.cpp b/lib/Target/TargetAsmInfo.cpp
index 8bc4368..5b7ddbf 100644
--- a/lib/Target/TargetAsmInfo.cpp
+++ b/lib/Target/TargetAsmInfo.cpp
@@ -106,7 +106,7 @@
   SupportsExceptionHandling = false;
   DwarfRequiresFrameSection = true;
   DwarfUsesInlineInfoSection = false;
-  NonLocalEHFrameLabel = false;
+  Is_EHSymbolPrivate = true;
   GlobalEHDirective = 0;
   SupportsWeakOmittedEHFrame = true;
   DwarfSectionOffsetDirective = 0;

lib/Target/X86/X86TargetAsmInfo.cpp

diff --git a/lib/Target/X86/X86TargetAsmInfo.cpp b/lib/Target/X86/X86TargetAsmInfo.cpp
index c33b765..9f114e6 100644
--- a/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -64,8 +64,7 @@
   // Leopard and above support aligned common symbols.
   COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
   HasDotTypeDotSizeDirective = false;
-  NonLocalEHFrameLabel = true;
-
+    
   if (is64Bit) {
     PersonalityPrefix = "";
     PersonalitySuffix = "+4@GOTPCREL";