[Bug target/92922] New: [10 regression] FAIL: gcc.target/aarch64/sve/acle/asm/ldnt1_u32.c -std=c90 -O1 -g -DTEST_FULL (internal compiler error)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92922

            Bug ID: 92922
           Summary: [10 regression] FAIL:
                    gcc.target/aarch64/sve/acle/asm/ldnt1_u32.c  -std=c90
                    -O1 -g -DTEST_FULL (internal compiler error)
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
  Target Milestone: ---
            Target: aarch64-*-*

spawn -ignore SIGHUP /opt/gcc/gcc-20191212/Build/gcc/xgcc
-B/opt/gcc/gcc-20191212/Build/gcc/ -mabi=ilp32 -fno-diagnostics-show-caret
-fno-diagnostics-show-line-numbers -fdiagnostics-color=never
-fdiagnostics-urls=never -std=c90 -O1 -g -DTEST_FULL -march=armv8.2-a+sve
-fno-ipa-icf -c -o ldnt1_u32.o
/opt/gcc/gcc-20191212/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/ldnt1_u32.c
during RTL pass: dse1
/opt/gcc/gcc-20191212/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/ldnt1_u32.c:
In function 'ldnt1_vnum_u32_1':
/opt/gcc/gcc-20191212/gcc/testsuite/gcc.target/aarch64/sve/acle/asm/ldnt1_u32.c:95:1:
internal compiler error: in plus_constant, at explow.c:102
0x8ab947 plus_constant(machine_mode, rtx_def*, poly_int<2u, long>, bool)
        ../../gcc/explow.c:102
0x14d225f check_mem_read_rtx
        ../../gcc/dse.c:2148
0x14d225f check_mem_read_use
        ../../gcc/dse.c:2316
0xc0ceef note_uses(rtx_def**, void (*)(rtx_def**, void*), void*)
        ../../gcc/rtlanal.c:2024
0x14d41e3 scan_insn
        ../../gcc/dse.c:2425
0x14d41e3 dse_step1
        ../../gcc/dse.c:2690
0x14d41e3 rest_of_handle_dse
        ../../gcc/dse.c:3607
0x14d41e3 execute
        ../../gcc/dse.c:3668