[Bug middle-end/63669] New: [AArch64] gcc.dg/torture/asm-subreg-1.c ICE in reload.c on 4.8 branch or on 4.9 and 5.0 with -mno-lra

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63669

            Bug ID: 63669
           Summary: [AArch64] gcc.dg/torture/asm-subreg-1.c ICE in
                    reload.c on 4.8 branch or on 4.9 and 5.0 with -mno-lra
           Product: gcc
           Version: 4.8.4
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org

gcc.dg/torture/asm-subreg-1.c ICEs with:

$ aarch64-none-elf-gcc $TOP/gcc/testsuite/gcc.dg/torture/asm-subreg-1.c
-fno-diagnostics-show-caret -O1 -S  -o asm-subreg-1.s
$TOP/gcc/testsuite/gcc.dg/torture/asm-subreg-1.c: In function
'evas_common_convert_yuv_420p_601_rgba':
$TOP/gcc/testsuite/gcc.dg/torture/asm-subreg-1.c:14:1: internal compiler error:
Segmentation fault
0x9ec985 crash_signal
        $TOP/gcc/toplev.c:349
0x972555 find_reloads_address_part
        $TOP/gcc/reload.c:6106
0x972134 find_reloads_address
        $TOP/gcc/reload.c:5273
0x974936 find_reloads(rtx_insn*, int, int, int, short*)
        $TOP/gcc/reload.c:2895
0x984e92 calculate_needs_all_insns
        $TOP/gcc/reload1.c:1519
0x98679b reload(rtx_insn*, int)
        $TOP/gcc/reload1.c:1007
0x87eaa2 do_reload
        $TOP/gcc/ira.c:5386
0x87eaa2 execute
        $TOP/gcc/ira.c:5536
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Please include the complete backtrace with any bug report.
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Since this happens reload it needs an -mno-lra to reproduce on trunk and 4.9