[Bug target/104704] [12 Regression] ix86_gen_scratch_sse_rtx doesn't work with explicit XMM7/XMM15/XMM31 usage

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104704

--- Comment #6 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Hongtao.liu from comment #5)
> I notice it regresses
> 
> FAIL: gcc.target/i386/incoming-11.c scan-assembler-not andl[\\t
> ]*\\$-16,[\\t ]*%esp

Why replace ix86_gen_scratch_sse_rtx with gen_reg_rtx will affect this
testcase, hmm.