From d75652426799d60e671d178de054309840312997 Mon Sep 17 00:00:00 2001
From: Mark Heffernan <meheff@google.com>
Date: Mon, 21 Jul 2014 19:06:29 +0000
Subject: Fix build breakage caused by use of std::to_string(int).  Replace
 with raw_string_ostream.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213578 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/Basic/Attr.td | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index 4850e2675c..62bb1ddb7f 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -1814,40 +1814,45 @@ def LoopHint : Attr {
       // String "unroll" of "#pragma unroll" is already emitted as the
       // pragma name.
       if (option == UnrollCount)
-        OS << getValueString();
+        printArgument(OS);
       OS << "\n";
       return;
     }
     assert(SpellingIndex == Pragma_clang_loop && "Unexpected spelling");
-    OS << getOptionName(option) << getValueString() << "\n";
+    OS << getOptionName(option);
+    printArgument(OS);
+    OS << "\n";
   }
 
-  // Return a string containing the loop hint argument including the
-  // enclosing parentheses.
-  std::string getValueString() const {
-    std::string ValueName;
+  // Prints the loop hint argument including the enclosing parentheses to OS.
+  void printArgument(raw_ostream &OS) const {
+    OS << "(";
     if (option == VectorizeWidth || option == InterleaveCount ||
         option == UnrollCount)
-      ValueName = std::to_string(value);
+      OS << value;
     else if (value)
-      ValueName = "enable";
+      OS << "enable";
     else
-      ValueName = "disable";
-
-    return "(" + ValueName + ")";
+      OS << "disable";
+    OS << ")";
   }
 
   // Return a string suitable for identifying this attribute in diagnostics.
   std::string getDiagnosticName() const {
+    std::string DiagnosticName;
+    llvm::raw_string_ostream OS(DiagnosticName);
     unsigned SpellingIndex = getSpellingListIndex();
     if (SpellingIndex == Pragma_unroll && option == Unroll)
-      return "#pragma unroll";
+      OS << "#pragma unroll";
     else if (SpellingIndex == Pragma_unroll && option == UnrollCount) {
-      return "#pragma unroll" + getValueString();
+      OS << "#pragma unroll";
+      printArgument(OS);
     } else {
       assert(SpellingIndex == Pragma_clang_loop && "Unexpected spelling");
-      return std::string(getOptionName(option)) + getValueString();
+      OS << getOptionName(option);
+      printArgument(OS);
     }
+    return OS.str();
   }
   }];
 
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