i386: Avoid =&r,r,r andn double-word alternative for ia32 [PR114810]
As discussed in the PR, on ia32 with its 8 GPRs, where 1 is always fixed
and other 2 often are as well having an alternative which needs 3
double-word registers is just too much for RA.
The following patch splits that alternative into two, one with o is used
even on ia32, but one with the 3x r is used just for -m64/-mx32.
Tried to reduce the testcase further, but it wasn't easily possible.
2024-04-23 Jakub Jelinek <jakub@redhat.com>
PR target/114810
* config/i386/i386.md (*andn<dwi>3_doubleword_bmi): Split the =&r,r,ro
alternative into =&r,r,r enabled only for x64 and =&r,r,o.
* g++.target/i386/pr114810.C: New test.