[Bug target/65577] New: ICE on g++.dg/torture/pr58369.C

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65577

            Bug ID: 65577
           Summary: ICE on g++.dg/torture/pr58369.C
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: msebor at gcc dot gnu.org

Compiling the g++.dg/torture/pr58369.C test with yesterday's trunk (r221640) on
powerpc64 (a POWER7 processor) fails with the ICE below.  Interestingly, the
ICE disappears with -O1.  On powerpc64le gcc compiles the test successfully.

$ g++ -O0 -c /src/gcc-trunk/gcc/testsuite/g++.dg/torture/pr58369.C
/src/gcc-trunk/gcc/testsuite/g++.dg/torture/pr58369.C: In function âT
ellint_rj_imp(T, T, T, T, Policy&) [with T = long double; Policy = PolicyA]â:
/src/gcc-trunk/gcc/testsuite/g++.dg/torture/pr58369.C:88:1: error:
unrecognizable insn:
 }
 ^
(insn 248 247 99 8 (set (reg:DF 10 10)
        (mem/u/c:DF (symbol_ref/u:DI ("*.LC0") [flags 0x2]) [0  S8 A64]))
/src/gcc-trunk/gcc/testsuite/g++.dg/torture/pr58369.C:70 -1
     (nil))
/src/gcc-trunk/gcc/testsuite/g++.dg/torture/pr58369.C:88:1: internal compiler
error: in extract_insn, at recog.c:2343
0x109c9f1b _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
    /src/gcc-trunk/gcc/rtl-error.c:110
0x109c9f6f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
    /src/gcc-trunk/gcc/rtl-error.c:118
0x1098f907 extract_insn(rtx_insn*)
    /src/gcc-trunk/gcc/recog.c:2343
0x1098f9c7 extract_insn_cached(rtx_insn*)
    /src/gcc-trunk/gcc/recog.c:2234
0x106b6817 cleanup_subreg_operands(rtx_insn*)
    /src/gcc-trunk/gcc/final.c:3137
0x109c74b7 reload(rtx_insn*, int)
    /src/gcc-trunk/gcc/reload1.c:1278
0x10854af7 do_reload
    /src/gcc-trunk/gcc/ira.c:5430
0x10854af7 execute
    /src/gcc-trunk/gcc/ira.c:5589
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