[X86] Change CMPSS/CMPSD intrinsic instructions to use sse_load_f32/f64 as its memory...

[X86] Change CMPSS/CMPSD intrinsic instructions to use sse_load_f32/f64 as its memory pattern instead of full vector load.

These intrinsics only load a single element. We should use sse_loadf32/f64 to give more options of what loads it can match.

Currently these instructions are often only getting their load folded thanks to the load folding in the peephole pass. I plan to add more types of loads to sse_load_f32/64 so we can match without the peephole.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289423 91177308-0d34-0410-b5e6-96231b3b80d8