Add strictfp attribute to prevent unwanted optimizations of libm calls

Differential Revision: https://reviews.llvm.org/D34163

llvm-svn: 310885
diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index e7362ea..84c93c4 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -1377,6 +1377,7 @@
   case Attribute::InaccessibleMemOrArgMemOnly:
   case Attribute::AllocSize:
   case Attribute::Speculatable:
+  case Attribute::StrictFP:
     return true;
   default:
     break;