[X86][FastISel] Choose EVEX instructions when possible when lowering x86_sse_cvttss2si and similar intrinsics.

This should fix a machine verifier error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336924 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed