Implement -cl-finite-math-only

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120878 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index 82b4b50..ad70b60 100644
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -183,6 +183,8 @@
     llvm::FloatABIType = llvm::FloatABI::Default;
   }
 
+  llvm::NoInfsFPMath = CodeGenOpts.NoInfsFPMath;
+  llvm::NoNaNsFPMath = CodeGenOpts.NoNaNsFPMath;
   NoZerosInBSS = CodeGenOpts.NoZeroInitializedInBSS;
   llvm::UseSoftFloat = CodeGenOpts.SoftFloat;
   UnwindTablesMandatory = CodeGenOpts.UnwindTables;