[Bug rtl-optimization/69847] Spec 2006 403.gcc slows down with -mlra vs. reload on PowerPC

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69847

mwahab at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mwahab at gcc dot gnu.org

--- Comment #22 from mwahab at gcc dot gnu.org ---
I believe that this patch is the cause of compilation failures for a number of
tests on arm-none-linux-gnueabihf and arm-none-eabi.

E.g. arm-none-linux-gnueabihf-gcc -S testsuite/gcc.dg/torture/vshuf-v64qi.c -O1
results in an ICE with
----
testsuite/gcc.dg/torture/vshuf-main.inc: In function ‘test_2’:
testsuite/gcc.dg/torture/vshuf-main.inc:28:1: error: insn does not satisfy its
constraints:
 TESTS
 ^~~~~
(insn 606 607 589 2 (set (reg:QI 3 r3 [326])
        (reg:QI 31 s15)) testsuite/gcc.dg/torture/vshuf-main.inc:28 182
{*arm_movqi_insn}
     (expr_list:REG_EQUAL (const_int 13 [0xd])
        (nil)))
testsuite/gcc.dg/torture/vshuf-main.inc:28:1: internal compiler error: in
extract_constrain_insn, at recog.c:2211
0xaea3e8 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        /work/src/gnutools/armdsg/src/gcc/gcc/rtl-error.c:108
0xaea40f _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        /work/src/gnutools/armdsg/src/gcc/gcc/rtl-error.c:119
0xabcf1d extract_constrain_insn(rtx_insn*)
        /work/src/gnutools/armdsg/src/gcc/gcc/recog.c:2211
0x9d76af check_rtl
        /work/src/gnutools/armdsg/src/gcc/gcc/lra.c:2108
0x9dbfa9 lra(_IO_FILE*)
        /work/src/gnutools/armdsg/src/gcc/gcc/lra.c:2516
0x99106f do_reload
        /work/src/gnutools/armdsg/src/gcc/gcc/ira.c:5384
0x99106f execute
        /work/src/gnutools/armdsg/src/gcc/gcc/ira.c:5568
----

The test compiles with trunk before the change.

Let me know if there's anything else I should check.
Matthew