[PowerPC] Do not produce invalid CTR loop with an FRem

An FRem instruction inside a loop should prevent the loop from being converted
into a CTR loop since this is not an operation that is legal on any PPC
subtarget. This will always be a call to a library function which means the
loop will be invalid if this instruction is in the body.

Fixes PR36292.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325739 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed