Make a few related changes:

1) add a new ASTContext::getFloatTypeSemantics method.
2) Use it from SemaExpr.cpp, CodeGenTypes.cpp and other places.
3) Change the TargetInfo.h get*Format methods to return their 
   fltSemantics byref instead of by pointer.
4) Change CodeGenFunction::EmitBuiltinExpr to allow builtins which
   sometimes expand specially and othertimes fall back to libm.
5) Add support for __builtin_nan("") to codegen, cases that don't pass
   in an empty string are currently lowered to libm calls.
6) Fix codegen of __builtin_infl.




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@52914 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index ce49cb2..5a4236a 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -613,7 +613,7 @@
         llvm::ConstantFP::get(llvm::APFloat(static_cast<double>(AmountVal)));
     else {
       llvm::APFloat F(static_cast<float>(AmountVal));
-      F.convert(*CGF.Target.getLongDoubleFormat(), llvm::APFloat::rmTowardZero);
+      F.convert(CGF.Target.getLongDoubleFormat(), llvm::APFloat::rmTowardZero);
       NextVal = llvm::ConstantFP::get(F);
     }
     NextVal = Builder.CreateAdd(InVal, NextVal, isInc ? "inc" : "dec");