[X86] Add test cases to show that we fail to fold loads into i8 smulo and i8/i16/i32/i64 umulo lowering without the assistance of the peephole pass. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350271 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed