Re: [PATCH] RISC-V: avoid splitting small constant in i_extrabit pattern

[Jeff Law via Gcc-patches]

On 4/9/23 23:07, Lin Sinan via Gcc-patches wrote:
From: Sinan Lin <linsinan....@linux.alibaba.com>

there is no need to split an xori/ori with an small constant. take the test
case `int foo(int idx) { return idx|3; }` as an example,

rv64im_zba generates:
         ori     a0,a0,3
         ret
but, rv64im_zba_zbs generates:
         ori     a0,a0,1
         ori     a0,a0,2
         ret

with this change, insn `ori r2,r1,3` will not be splitted in zbs.
As noted, this was actually a regression.  I've bootstrapped this change 
on rv64 with no regressions and pushed it to the trunk.

Thanks!

jeff