[InstCombine, NewGVN] remove FP undef from tests

I'm trying to preserve the intent of these tests by using 
non-undef operands; if we fix FP undef folding these tests
will not pass.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327004 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed