Factor a bit of code to MCStreamer::EmitLabel. Keep track of the last

non private symbol. This will be use for handling

foo:
  .cfi_startproc
  ...

On OS X where we have to create a foo.eh symbol.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130305 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 14 insertions, 7 deletions

diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index 80203cb..2f82977 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -278,12 +278,10 @@ void MCAsmStreamer::ChangeSection(const MCSection *Section) {
 
 void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
   assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
-  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
-  assert(getCurrentSection() && "Cannot emit before setting section!");
+  MCStreamer::EmitLabel(Symbol);
 
   OS << *Symbol << MAI.getLabelSuffix();
   EmitEOL();
-  Symbol->setSection(*getCurrentSection());
 }
 
 void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
diff --git a/lib/MC/MCObjectStreamer.cpp b/lib/MC/MCObjectStreamer.cpp
index 8beeeb7..ca1919a 100644
--- a/lib/MC/MCObjectStreamer.cpp
+++ b/lib/MC/MCObjectStreamer.cpp
@@ -107,10 +107,7 @@ void MCObjectStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
 }
 
 void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
-  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
-  assert(getCurrentSection() && "Cannot emit before setting section!");
-
-  Symbol->setSection(*getCurrentSection());
+  MCStreamer::EmitLabel(Symbol);
 
   MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
 
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 406910e..cfec865 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -12,6 +12,7 @@
 #include "llvm/MC/MCStreamer.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSymbol.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/ADT/SmallString.h"
@@ -153,12 +154,23 @@ void MCStreamer::EnsureValidFrame() {
     report_fatal_error("No open frame");
 }
 
+void MCStreamer::EmitLabel(MCSymbol *Symbol) {
+  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+  assert(getCurrentSection() && "Cannot emit before setting section!");
+  Symbol->setSection(*getCurrentSection());
+
+  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
+  if (!Symbol->getName().startswith(Prefix))
+    LastNonPrivate = Symbol;
+}
+
 void MCStreamer::EmitCFIStartProc() {
   MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
   if (CurFrame && !CurFrame->End)
     report_fatal_error("Starting a frame before finishing the previous one!");
   MCDwarfFrameInfo Frame;
   Frame.Begin = getContext().CreateTempSymbol();
+  Frame.Function = LastNonPrivate;
   EmitLabel(Frame.Begin);
   FrameInfos.push_back(Frame);
 }