Add FP_CONTRACT support for clang.

Clang will now honor the FP_CONTRACT pragma and emit LLVM
fmuladd intrinsics for expressions of the form A * B + C (when they occur in a
single statement).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164989 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Rewrite/Frontend/RewriteObjC.cpp b/lib/Rewrite/Frontend/RewriteObjC.cpp
index 62def16..a6dcc6b 100644
--- a/lib/Rewrite/Frontend/RewriteObjC.cpp
+++ b/lib/Rewrite/Frontend/RewriteObjC.cpp
@@ -3078,7 +3078,8 @@
                                                    SourceLocation());
     BinaryOperator *lessThanExpr = 
       new (Context) BinaryOperator(sizeofExpr, limit, BO_LE, Context->IntTy,
-                                   VK_RValue, OK_Ordinary, SourceLocation());
+                                   VK_RValue, OK_Ordinary, SourceLocation(),
+                                   false);
     // (sizeof(returnType) <= 8 ? objc_msgSend(...) : objc_msgSend_stret(...))
     ConditionalOperator *CondExpr =
       new (Context) ConditionalOperator(lessThanExpr,