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* [Bug rtl-optimization/98791] New: ICE in paradoxical_subreg_p (in ira) with SVE, LTO
@ 2021-01-22 11:04 acoplan at gcc dot gnu.org
  2021-01-22 11:16 ` [Bug rtl-optimization/98791] [11 Regression] " ktkachov at gcc dot gnu.org
                   ` (9 more replies)
  0 siblings, 10 replies; 11+ messages in thread
From: acoplan at gcc dot gnu.org @ 2021-01-22 11:04 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98791

            Bug ID: 98791
           Summary: ICE in paradoxical_subreg_p (in ira) with SVE, LTO
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: acoplan at gcc dot gnu.org
  Target Milestone: ---

The following fails:

$ cat test.c
extern char a[];
extern long b[];
void c(unsigned d, unsigned long long g[][13]) {
  for (int f = 0; f < 24; f += d - 45810) {
    a[f] = g[0][2];
    b[f] = 0;
  }
}
static unsigned long long e[1][13];
int main() { c(45811, e); }
$ aarch64-elf-gcc -flto -O1 -ftree-vectorize -march=armv8.2-a+sve
--param=aarch64-autovec-preference=3 test.c
during RTL pass: ira
test.c: In function 'main':
test.c:10:27: internal compiler error: in paradoxical_subreg_p, at rtl.h:3170
   10 | int main() { c(45811, e); }
      |                           ^
0xab2093 paradoxical_subreg_p(machine_mode, machine_mode)
        /home/alecop01/toolchain/src/gcc/gcc/rtl.h:3170
0xab2093 narrower_subreg_mode(machine_mode, machine_mode)
        /home/alecop01/toolchain/src/gcc/gcc/rtl.h:3200
0xab2093 update_costs_from_allocno
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:1410
0xab26c5 update_costs_from_copies
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:1480
0xab3790 assign_hard_reg
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:1971
0xabc506 pop_allocnos_from_stack
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:2707
0xabc506 color_allocnos
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:3251
0xabc506 color_pass
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:3363
0xaa5ab6 ira_traverse_loop_tree(bool, ira_loop_tree_node*, void
(*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
        /home/alecop01/toolchain/src/gcc/gcc/ira-build.c:1776
0xab8649 do_coloring
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:3514
0xab8649 color
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:4885
0xab8649 ira_color()
        /home/alecop01/toolchain/src/gcc/gcc/ira-color.c:5014
0xa9f999 ira
        /home/alecop01/toolchain/src/gcc/gcc/ira.c:5654
0xa9f999 execute
        /home/alecop01/toolchain/src/gcc/gcc/ira.c:5964
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: aarch64-elf-gcc returned 1 exit status
compilation terminated.
/home/alecop01/toolchain/build-aarch64-elf/install/lib/gcc/aarch64-elf/11.0.0/../../../../aarch64-elf/bin/ld:
error: lto-wrapper failed
collect2: error: ld returned 1 exit status

The backtrace appears to be the same as PR97092, although that PR doesn't
appear to have regressed (at least for the original testcase).

^ permalink raw reply	[flat|nested] 11+ messages in thread
end of thread, other threads:[~2021-03-15 11:19 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-22 11:04 [Bug rtl-optimization/98791] New: ICE in paradoxical_subreg_p (in ira) with SVE, LTO acoplan at gcc dot gnu.org
2021-01-22 11:16 ` [Bug rtl-optimization/98791] [11 Regression] " ktkachov at gcc dot gnu.org
2021-02-01  8:55 ` acoplan at gcc dot gnu.org
2021-02-15 14:28 ` [Bug rtl-optimization/98791] [11 Regression] ICE in paradoxical_subreg_p (in ira) with SVE acoplan at gcc dot gnu.org
2021-02-22 13:46 ` cvs-commit at gcc dot gnu.org
2021-03-03 23:37 ` law at gcc dot gnu.org
2021-03-08 11:52 ` avieira at gcc dot gnu.org
2021-03-08 15:21 ` [Bug rtl-optimization/98791] [10 " law at gcc dot gnu.org
2021-03-08 15:29 ` avieira at gcc dot gnu.org
2021-03-15 11:18 ` cvs-commit at gcc dot gnu.org
2021-03-15 11:19 ` avieira at gcc dot gnu.org

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