[Bug target/61411] New: [NEON] ICE in reload_cse_simplify_operands, at postreload.c:411

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61411

            Bug ID: 61411
           Summary: [NEON] ICE in reload_cse_simplify_operands, at
                    postreload.c:411
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: cbaylis at gcc dot gnu.org
            Target: aarch64-oe-linux

Created attachment 32890
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32890&action=edit
Reduced test case

The attached test case results in an ICE when compiled with gcc 4.9

$ aarch64-oe-linux-gcc -O3 -c test.c
test.c: In function âvp9_idct16x16_256_add_neon_pass2â:
test.c:126:1: error: insn does not satisfy its constraints:
 }
 ^
(insn 198 110 159 2 (set (reg:V8QI 37 v5 [orig:118 D.16400 ] [118])
        (mem:V8QI (plus:DI (reg/v/f:DI 20 x20 [orig:202 dest ] [202])
                (reg:DI 8 x8 [340])) [2 MEM[(const int64_t *)dest_44]+0 S8
A64]))
/home/cbaylis/tools/tools-aarch64-oe-linux-4.9/lib/gcc/aarch64-oe-linux/4.9.1/include/arm_neon.h:3646
735 {*aarch64_simd_movv8qi}
     (nil))
test.c:126:1: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:411
0x7fc47a _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/rtl-error.c:109
0x7fc49f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/rtl-error.c:120
0x7bdbd9 reload_cse_simplify_operands
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:411
0x7bf69c reload_cse_simplify
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:181
0x7bf69c reload_cse_regs_1
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:220
0x7bfa8b reload_cse_regs
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:68
0x7bfa8b rest_of_handle_postreload
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:2332
0x7bfa8b execute
        /home/cbaylis/srcarea/gcc/gcc-4_9-branch/gcc/postreload.c:2368


There is a patch which appears to fix this problem at
https://gcc.gnu.org/ml/gcc-patches/2014-05/msg02397.html