[Bug target/125549] New: rs6000: Fix %Y modifier to handle VSX register numbering

[kishan at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125549

            Bug ID: 125549
           Summary: rs6000: Fix %Y modifier to handle VSX register
                    numbering
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: kishan at gcc dot gnu.org
          Reporter: kishan at gcc dot gnu.org
                CC: jskumari at gcc dot gnu.org, meissner at gcc dot gnu.org,
                    segher at gcc dot gnu.org
  Target Milestone: ---
            Target: power*-linux-gnu

The %Y print modifier in rs6000.cc adds 2 to hardware register numbers, but
when used with VSX registers with modifier '%x' in some patterns, it should add
2 to the VSX register number instead. This causes incorrect register numbers to
be emitted when Altivec registers are allocated.