Merge upstream r127116

1 files changed, 52 insertions, 31 deletions

diff --git a/lib/MC/MCSectionELF.cpp b/lib/MC/MCSectionELF.cpp
index ab72a0e..dfd77c3 100644
--- a/lib/MC/MCSectionELF.cpp
+++ b/lib/MC/MCSectionELF.cpp
@@ -11,7 +11,9 @@
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ELF.h"
 #include "llvm/Support/raw_ostream.h"
+
 using namespace llvm;
 
 MCSectionELF::~MCSectionELF() {} // anchor.
@@ -37,41 +39,63 @@ void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
     return;
   }
 
-  OS << "\t.section\t" << getSectionName();
-  
+  StringRef name = getSectionName();
+  if (name.find_first_not_of("0123456789_."
+                             "abcdefghijklmnopqrstuvwxyz"
+                             "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == name.npos) {
+    OS << "\t.section\t" << name;
+  } else {
+    OS << "\t.section\t\"";
+    for (const char *b = name.begin(), *e = name.end(); b < e; ++b) {
+      if (*b == '"') // Unquoted "
+        OS << "\\\"";
+      else if (*b != '\\') // Neither " or backslash
+        OS << *b;
+      else if (b + 1 == e) // Trailing backslash
+        OS << "\\\\";
+      else {
+        OS << b[0] << b[1]; // Quoted character
+        ++b;
+      }
+    }
+    OS << '"';
+  }
+
   // Handle the weird solaris syntax if desired.
   if (MAI.usesSunStyleELFSectionSwitchSyntax() && 
-      !(Flags & MCSectionELF::SHF_MERGE)) {
-    if (Flags & MCSectionELF::SHF_ALLOC)
+      !(Flags & ELF::SHF_MERGE)) {
+    if (Flags & ELF::SHF_ALLOC)
       OS << ",#alloc";
-    if (Flags & MCSectionELF::SHF_EXECINSTR)
+    if (Flags & ELF::SHF_EXECINSTR)
       OS << ",#execinstr";
-    if (Flags & MCSectionELF::SHF_WRITE)
+    if (Flags & ELF::SHF_WRITE)
       OS << ",#write";
-    if (Flags & MCSectionELF::SHF_TLS)
+    if (Flags & ELF::SHF_TLS)
       OS << ",#tls";
     OS << '\n';
     return;
   }
   
   OS << ",\"";
-  if (Flags & MCSectionELF::SHF_ALLOC)
+  if (Flags & ELF::SHF_ALLOC)
     OS << 'a';
-  if (Flags & MCSectionELF::SHF_EXECINSTR)
+  if (Flags & ELF::SHF_EXECINSTR)
     OS << 'x';
-  if (Flags & MCSectionELF::SHF_WRITE)
+  if (Flags & ELF::SHF_GROUP)
+    OS << 'G';
+  if (Flags & ELF::SHF_WRITE)
     OS << 'w';
-  if (Flags & MCSectionELF::SHF_MERGE)
+  if (Flags & ELF::SHF_MERGE)
     OS << 'M';
-  if (Flags & MCSectionELF::SHF_STRINGS)
+  if (Flags & ELF::SHF_STRINGS)
     OS << 'S';
-  if (Flags & MCSectionELF::SHF_TLS)
+  if (Flags & ELF::SHF_TLS)
     OS << 'T';
   
   // If there are target-specific flags, print them.
-  if (Flags & MCSectionELF::XCORE_SHF_CP_SECTION)
+  if (Flags & ELF::XCORE_SHF_CP_SECTION)
     OS << 'c';
-  if (Flags & MCSectionELF::XCORE_SHF_DP_SECTION)
+  if (Flags & ELF::XCORE_SHF_DP_SECTION)
     OS << 'd';
   
   OS << '"';
@@ -84,38 +108,35 @@ void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
   else
     OS << '@';
 
-  if (Type == MCSectionELF::SHT_INIT_ARRAY)
+  if (Type == ELF::SHT_INIT_ARRAY)
     OS << "init_array";
-  else if (Type == MCSectionELF::SHT_FINI_ARRAY)
+  else if (Type == ELF::SHT_FINI_ARRAY)
     OS << "fini_array";
-  else if (Type == MCSectionELF::SHT_PREINIT_ARRAY)
+  else if (Type == ELF::SHT_PREINIT_ARRAY)
     OS << "preinit_array";
-  else if (Type == MCSectionELF::SHT_NOBITS)
+  else if (Type == ELF::SHT_NOBITS)
     OS << "nobits";
-  else if (Type == MCSectionELF::SHT_PROGBITS)
+  else if (Type == ELF::SHT_NOTE)
+    OS << "note";
+  else if (Type == ELF::SHT_PROGBITS)
     OS << "progbits";
 
   if (EntrySize) {
-    assert(Flags & MCSectionELF::SHF_MERGE);
+    assert(Flags & ELF::SHF_MERGE);
     OS << "," << EntrySize;
   }
 
+  if (Flags & ELF::SHF_GROUP)
+    OS << "," << Group->getName() << ",comdat";
   OS << '\n';
 }
 
 bool MCSectionELF::UseCodeAlign() const {
-  return getFlags() & MCSectionELF::SHF_EXECINSTR;
+  return getFlags() & ELF::SHF_EXECINSTR;
 }
 
-// HasCommonSymbols - True if this section holds common symbols, this is
-// indicated on the ELF object file by a symbol with SHN_COMMON section 
-// header index.
-bool MCSectionELF::HasCommonSymbols() const {
-  
-  if (StringRef(SectionName).startswith(".gnu.linkonce."))
-    return true;
-
-  return false;
+bool MCSectionELF::isVirtualSection() const {
+  return getType() == ELF::SHT_NOBITS;
 }
 
 unsigned MCSectionELF::DetermineEntrySize(SectionKind Kind) {