Basic: use hex string for __ARM_FP macro

The ARM ACLE describes the values as hex constants rather than numeric
constants; follow suit.  Address post-commit review comments from Jon Roelofs.

llvm-svn: 218009

1 files changed, 2 insertions, 1 deletions

diff --git a/clang/lib/Basic/Targets.cpp b/clang/lib/Basic/Targets.cpp
index d7832e30372..511817f324c 100644
--- a/clang/lib/Basic/Targets.cpp
+++ b/clang/lib/Basic/Targets.cpp
@@ -21,6 +21,7 @@
 #include "clang/Basic/TargetOptions.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
@@ -4055,7 +4056,7 @@ public:
 
     // ACLE 6.5.1 Hardware Floating Point
     if (HW_FP)
-      Builder.defineMacro("__ARM_FP", std::to_string(HW_FP));
+      Builder.defineMacro("__ARM_FP", "0x" + llvm::utohexstr(HW_FP));
 
     // ACLE predefines.
     Builder.defineMacro("__ARM_ACLE", "200");