optimize builtin_isnan/isinf to not do an extraneous extension from
float -> double (which happens because they are modelled as int(...)
functions), and add a testcase for isinf.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103167 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed