[Bug target/89504] New: Checking ICE in 'gcc.dg/rtl/x86_64/pro_and_epilogue.c'

[tschwinge at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89504

            Bug ID: 89504
           Summary: Checking ICE in 'gcc.dg/rtl/x86_64/pro_and_epilogue.c'
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Keywords: ice-checking
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tschwinge at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu
             Build: x86_64-pc-linux-gnu

Comparing a '--enable-checking=yes' build with a
'--enable-checking=yes,extra,df,fold,rtl' build of r269110 (but this started
much, much earlier, but can't tell exactly when), I see:

    [-PASS:-]{+FAIL: gcc.dg/rtl/x86_64/pro_and_epilogue.c (internal compiler
error)+}
    {+FAIL:+} gcc.dg/rtl/x86_64/pro_and_epilogue.c (test for excess errors)
    [-PASS:-]{+FAIL:+} gcc.dg/rtl/x86_64/pro_and_epilogue.c scan-rtl-dump-times
pro_and_epilogue "NOTE_INSN_PROLOGUE_END" 1
    [-PASS:-]{+FAIL:+} gcc.dg/rtl/x86_64/pro_and_epilogue.c scan-rtl-dump-times
pro_and_epilogue "simple_return" 2

    during RTL pass: pro_and_epilogue
    dump file: pro_and_epilogue.c.288r.pro_and_epilogue
    [...]/gcc/testsuite/gcc.dg/rtl/x86_64/pro_and_epilogue.c: In function
'test_1':
    [...]/gcc/testsuite/gcc.dg/rtl/x86_64/pro_and_epilogue.c:103:1: internal
compiler error: in df_scan_verify, at df-scan.c:4233
    0x5ffb7f df_scan_verify()
            [...]/gcc/df-scan.c:4233
    0xb729f8 df_verify()
            [...]/gcc/df-core.c:1817
    0xb72a87 df_analyze_1
            [...]/gcc/df-core.c:1213
    0xca4fb2 thread_prologue_and_epilogue_insns()
            [...]/gcc/function.c:5840
    0xca5872 rest_of_handle_thread_prologue_and_epilogue
            [...]/gcc/function.c:6342
    0xca5872 execute
            [...]/gcc/function.c:6384