[Bug tree-optimization/68526] New: [6 Regression] gcc.target/powerpc/recip-4.c fails starting with r230492

["pthaugen at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68526

            Bug ID: 68526
           Summary: [6 Regression] gcc.target/powerpc/recip-4.c fails
                    starting with r230492
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pthaugen at gcc dot gnu.org
                CC: dje at gcc dot gnu.org, rsandifo at gcc dot gnu.org,
                    wschmidt at gcc dot gnu.org
  Target Milestone: ---
              Host: powerpc64-unknown-linux-gnu
            Target: powerpc64-unknown-linux-gnu
             Build: powerpc64-unknown-linux-gnu

Subject testcase starts failing with stated revision, is now generating
separate sqrt/recip instructions instead of combined insn (along with ancillary
insns which also fail to match).

Before:
        xvrsqrtedp 0,12


After:
        xvsqrtdp 12,0
        xvredp 0,12