[Bug target/66033] New: rs6000 nops removed by rtl_dce

[amodra at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66033

            Bug ID: 66033
           Summary: rs6000 nops removed by rtl_dce
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amodra at gmail dot com
  Target Milestone: ---

gen_nop() is called in various places in rs6000.c.  These nops don't survive
rtl_dce, thus breaking darwin's TARGET_FIX_AND_CONTINUE, and the scheduler nop
insertion.