Temporarily disable this code, as it is emitting LLVM_NAN("nan") which results in a call to the
glibc 'nan' function because the initializer is not a string.  This breaks when used in a global
initializer.  Try compiling this testcase for example:

%X = global float <some nan value>

llvm-svn: 15223
diff --git a/llvm/lib/Target/CBackend/Writer.cpp b/llvm/lib/Target/CBackend/Writer.cpp
index 926f72d..65a110e 100644
--- a/llvm/lib/Target/CBackend/Writer.cpp
+++ b/llvm/lib/Target/CBackend/Writer.cpp
@@ -570,9 +570,9 @@
       if (IsNAN(FPC->getValue())) {
         // The value is NaN
         if (FPC->getType() == Type::FloatTy)
-          Out << "LLVM_NANF(\"" << Num << "\") /*nan*/ ";
+          Out << "LLVM_NANF(\"0\") /*nan*/ ";
         else
-          Out << "LLVM_NAN(\"" << Num << "\") /*nan*/ ";
+          Out << "LLVM_NAN(\"0\") /*nan*/ ";
       } else if (IsInf(FPC->getValue())) {
         // The value is Inf
         if (FPC->getValue() < 0) Out << "-";