[Bug testsuite/97705] [11 regression] cc.c-torture/unsorted/dump-noaddr.c.*r.ira fails after r11-4637

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97705

--- Comment #3 from Kewen Lin <linkw at gcc dot gnu.org> ---
The "-DMASK=2" dumping has more lines for register 282, which is introduced in
ira. Something weird causes ira to dump more contexts.

$ diff dump1/dump-noaddr.c.289r.ira dump2/dump-noaddr.c.289r.ira
107a108
>   r282 costs: BASE_REGS:0 GENERAL_REGS:0 FLOAT_REGS:312 ALTIVEC_REGS:312 VSX_REGS:312 GEN_OR_FLOAT_REGS:312 GEN_OR_VSX_REGS:312 LINK_REGS:468 CTR_REGS:468 LINK_OR_CTR_REGS:468 SPEC_OR_GEN_REGS:468 ALL_REGS:1872 MEM:312
373a375
>   r282 costs: GENERAL_REGS:0 FLOAT_REGS:312 ALTIVEC_REGS:312 VSX_REGS:312 GEN_OR_FLOAT_REGS:312 GEN_OR_VSX_REGS:312 LINK_REGS:468 CTR_REGS:468 LINK_OR_CTR_REGS:468 SPEC_OR_GEN_REGS:468 ALL_REGS:1872 MEM:312