From d0cf77ad590633c0e10336e4c59b509140328042 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Sun, 1 Dec 2013 04:40:32 +0000
Subject: --- Reverse-merging r195823 into '.': U    lib/MC/MCSectionCOFF.cpp U
    lib/CodeGen/TargetLoweringObjectFileImpl.cpp U   
 test/MC/COFF/weak-symbol.ll U    test/MC/COFF/tricky-names.ll  G   . ---
 Recording mergeinfo for reverse merge of r195823 into '.':  G   .

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@196036 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/TargetLoweringObjectFileImpl.cpp | 38 +++++++++++++++-------------
 1 file changed, 21 insertions(+), 17 deletions(-)

(limited to 'lib/CodeGen')

diff --git a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
index 229ccfae28..59d7b57037 100644
--- a/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
+++ b/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
@@ -723,31 +723,33 @@ getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
                          Mangler *Mang, const TargetMachine &TM) const {
   int Selection = 0;
   unsigned Characteristics = getCOFFSectionFlags(Kind);
-  StringRef Name = GV->getSection();
-  StringRef COMDATSymName = "";
+  SmallString<128> Name(GV->getSection().c_str());
   if (GV->isWeakForLinker()) {
     Selection = COFF::IMAGE_COMDAT_SELECT_ANY;
     Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
-    MCSymbol *Sym = getSymbol(*Mang, GV);
-    COMDATSymName = Sym->getName();
+    Name.append("$");
+    Mang->getNameWithPrefix(Name, GV, false, false);
   }
   return getContext().getCOFFSection(Name,
                                      Characteristics,
                                      Kind,
-                                     COMDATSymName,
+                                     "",
                                      Selection);
 }
 
-static const char *getCOFFSectionNameForUniqueGlobal(SectionKind Kind) {
+static const char *getCOFFSectionPrefixForUniqueGlobal(SectionKind Kind) {
   if (Kind.isText())
-    return ".text";
+    return ".text$";
   if (Kind.isBSS ())
-    return ".bss";
-  if (Kind.isThreadLocal())
-    return ".tls";
+    return ".bss$";
+  if (Kind.isThreadLocal()) {
+    // 'LLVM' is just an arbitary string to ensure that the section name gets
+    // sorted in between '.tls$AAA' and '.tls$ZZZ' by the linker.
+    return ".tls$LLVM";
+  }
   if (Kind.isWriteable())
-    return ".data";
-  return ".rdata";
+    return ".data$";
+  return ".rdata$";
 }
 
 
@@ -758,14 +760,16 @@ SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
   // If this global is linkonce/weak and the target handles this by emitting it
   // into a 'uniqued' section name, create and return the section now.
   if (GV->isWeakForLinker()) {
-    const char *Name = getCOFFSectionNameForUniqueGlobal(Kind);
+    const char *Prefix = getCOFFSectionPrefixForUniqueGlobal(Kind);
+    SmallString<128> Name(Prefix, Prefix+strlen(Prefix));
+    Mang->getNameWithPrefix(Name, GV, false, false);
+
     unsigned Characteristics = getCOFFSectionFlags(Kind);
 
     Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
-    MCSymbol *Sym = getSymbol(*Mang, GV);
-    return getContext().getCOFFSection(Name, Characteristics,
-                                       Kind, Sym->getName(),
-                                       COFF::IMAGE_COMDAT_SELECT_ANY);
+
+    return getContext().getCOFFSection(Name.str(), Characteristics,
+                                       Kind, "", COFF::IMAGE_COMDAT_SELECT_ANY);
   }
 
   if (Kind.isText())
-- 
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