Avoid using EL_GETFP.

This should fix the build against old versions of libedit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200794 91177308-0d34-0410-b5e6-96231b3b80d8
SimplifyLibCalls: Push TLI through the exp2->ldexp transform.

For the odd case of platforms with exp2 available but not ldexp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200795 91177308-0d34-0410-b5e6-96231b3b80d8