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* [Bug target/106959] New: [13 Regression] ICE in curr_insn_transform, at lra-constraints.cc:4168 (error: unable to generate reloads), or ICE in simplify_subreg, at simplify-rtx.cc:7405
@ 2022-09-17  6:06 asolokha at gmx dot com
  2022-09-17  6:08 ` [Bug target/106959] " asolokha at gmx dot com
                   ` (7 more replies)
  0 siblings, 8 replies; 9+ messages in thread
From: asolokha at gmx dot com @ 2022-09-17  6:06 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106959

            Bug ID: 106959
           Summary: [13 Regression] ICE in curr_insn_transform, at
                    lra-constraints.cc:4168 (error: unable to generate
                    reloads), or ICE in simplify_subreg, at
                    simplify-rtx.cc:7405
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
                CC: sayle at gcc dot gnu.org
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

1. gcc 13.0.0 20220911 snapshot (g:0ea5e3f4542832b8da016b152695e64a2a386309)
ICEs when compiling the following testcase w/ -msse4 -O2 -fno-tree-loop-im
--param max-combine-insns=2:

unsigned __int128 n;

int
foo (int x)
{
  __int128 a = 0;
  int b = !!(n * 2);

  while (x < 2)
    {
      if (a)
        {
          if (n)
            n ^= 1;
          else
            x <<= 32;
        }

      a = 1;
    }

  return b;
}

% x86_64-unknown-linux-gnu-gcc-13.0.0 -msse4 -O2 -fno-tree-loop-im --param
max-combine-insns=2 -w -c nyxubvpd.c
nyxubvpd.c: In function 'foo':
nyxubvpd.c:23:1: error: unable to generate reloads for:
   23 | }
      | ^
(insn 8 7 62 2 (parallel [
            (set (reg:TI 90)
                (ashift:TI (reg:V1TI 96 [ n.1_4 ])
                    (const_int 1 [0x1])))
            (clobber (reg:CC 17 flags))
        ]) "nyxubvpd.c":7:16 747 {ashlti3_doubleword}
     (expr_list:REG_DEAD (reg:V1TI 96 [ n.1_4 ])
        (expr_list:REG_UNUSED (reg:CC 17 flags)
            (nil))))
during RTL pass: reload
nyxubvpd.c:23:1: internal compiler error: in curr_insn_transform, at
lra-constraints.cc:4168
0x730822 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/rtl-error.cc:108
0x70a880 curr_insn_transform
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/lra-constraints.cc:4168
0xd41a2e lra_constraints(bool)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/lra-constraints.cc:5203
0xd2db02 lra(_IO_FILE*)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/lra.cc:2375
0xce35d9 do_reload
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/ira.cc:5940
0xce35d9 execute
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/ira.cc:6126

2. W/o --param max-combine-insns=2, it yields the following instead:

% x86_64-unknown-linux-gnu-gcc-13.0.0 -msse4 -O2 -fno-tree-loop-im -w -c
nyxubvpd.c
during RTL pass: combine
nyxubvpd.c: In function 'foo':
nyxubvpd.c:23:1: internal compiler error: in simplify_subreg, at
simplify-rtx.cc:7405
   23 | }
      | ^
0x734cf5 simplify_context::simplify_subreg(machine_mode, rtx_def*,
machine_mode, poly_int<1u, unsigned long>)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/simplify-rtx.cc:7405
0x1cdb6ff simplify_subreg(machine_mode, rtx_def*, machine_mode, poly_int<1u,
unsigned long>)
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/rtl.h:3498
0x1cdb6ff combine_simplify_rtx
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:5874
0x1cdd76e subst
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:5605
0x1cdd538 subst
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:5532
0x1cdd538 subst
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:5532
0x1cdd538 subst
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:5532
0x1ce0b22 try_combine
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:3336
0x1ce692c combine_instructions
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:1287
0x1ce692c rest_of_handle_combine
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:14978
0x1ce692c execute
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20220911/work/gcc-13-20220911/gcc/combine.cc:15023

It is probably a duplicate of PR106933.

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-12-24 17:29 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-17  6:06 [Bug target/106959] New: [13 Regression] ICE in curr_insn_transform, at lra-constraints.cc:4168 (error: unable to generate reloads), or ICE in simplify_subreg, at simplify-rtx.cc:7405 asolokha at gmx dot com
2022-09-17  6:08 ` [Bug target/106959] " asolokha at gmx dot com
2022-09-19  6:37 ` rguenth at gcc dot gnu.org
2022-09-20  8:32 ` [Bug target/106959] [13 Regression] ICE in curr_insn_transform, at lra-constraints.cc:4168 (error: unable to generate reloads), or ICE in simplify_subreg, at simplify-rtx.cc:7405 since r13-2100-g5cccc24c06610d2f marxin at gcc dot gnu.org
2022-10-18  8:44 ` rguenth at gcc dot gnu.org
2022-10-20 18:57 ` asolokha at gmx dot com
2022-10-20 22:55 ` hjl.tools at gmail dot com
2022-12-23  9:52 ` cvs-commit at gcc dot gnu.org
2022-12-24 17:29 ` roger at nextmovesoftware dot com

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