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* [Bug rtl-optimization/116238] New: [15 Regression] ICE building 526.blender_r on aarch64 SVE after 3b9b8d6cfdf59337f4b7ce10ce92a98044b2657b
@ 2024-08-05 13:14 ktkachov at gcc dot gnu.org
  2024-08-05 13:16 ` [Bug rtl-optimization/116238] " ktkachov at gcc dot gnu.org
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: ktkachov at gcc dot gnu.org @ 2024-08-05 13:14 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116238

            Bug ID: 116238
           Summary: [15 Regression] ICE building 526.blender_r on aarch64
                    SVE after 3b9b8d6cfdf59337f4b7ce10ce92a98044b2657b
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: aarch64-sve, ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
  Target Milestone: ---

I see 526.blender_r from SPEC2017 ICEing when building with -Ofast
-mcpu=neoverse-v2 -msve-vector-bits=128 -flto=auto.
Unfortunately the -flto is necessary to reproduce it.
I've reduced it to 3 small files that should be enough to reproduce it:
$ cat main.c
void a();
void main() { a(); }

$ cat foo.c
void a();
typedef struct {
  char b, c;
} d;
typedef struct {
  d bezt;
} e;
typedef struct {
  int f;
} g;
e *h, *j;
void i(g *k, e **l) { *l = &h[k->f]; }
void BKE_mask_calc_handle_point_auto(g *k, e *l) {
  float m, n = m / 2.0f;
  char o = l->bezt.c, p = l->bezt.b;
  i(k, &j);
  d *q = &j->bezt;
  if (q)
    a();
  l->bezt.b = p;
  l->bezt.c = o;
  a(n);
}

$ cat bar.c
void BKE_mask_calc_handle_point_auto();
int a() {
  int b;
  BKE_mask_calc_handle_point_auto(b);
}

Compile for aarch64 with:
gcc -Ofast -msve-vector-bits=128 -mcpu=neoverse-v2 main.c foo.c bar.c -flto
and the crash is:
during RTL pass: reload
bar.c: In function 'a.isra':
bar.c:5:1: internal compiler error: maximum number of generated reload insns
per insn achieved (90)
    5 | }
      | ^
0x1fe090b internal_error(char const*, ...)
        $SRC/gcc/diagnostic-global-context.cc:491
0xbff0c3 lra_constraints(bool)
        $SRC/gcc/lra-constraints.cc:5402
0xbe52ff lra(_IO_FILE*, int)
        $SRC/gcc/lra.cc:2442
0xb9919b do_reload
        $SRC/gcc/ira.cc:5973
0xb9919b execute
        $SRC/gcc/ira.cc:6161
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
lto-wrapper: fatal error: /home/ktkachov/builds/gcc-trunk/bin/gcc returned 1
exit status
compilation terminated.
/home/ktkachov/builds/binutils-trunk/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status

I've bisected it to the commit g:3b9b8d6cfdf59337f4b7ce10ce92a98044b2657b but I
don't know if that is the cause or uncovered a latent problem

^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2024-08-21 16:37 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-08-05 13:14 [Bug rtl-optimization/116238] New: [15 Regression] ICE building 526.blender_r on aarch64 SVE after 3b9b8d6cfdf59337f4b7ce10ce92a98044b2657b ktkachov at gcc dot gnu.org
2024-08-05 13:16 ` [Bug rtl-optimization/116238] " ktkachov at gcc dot gnu.org
2024-08-07 21:36 ` [Bug rtl-optimization/116238] [15 Regression] ICE building 526.blender_r on aarch64 SVE after r15-1619-g3b9b8d6cfdf593 pinskia at gcc dot gnu.org
2024-08-07 21:46 ` pinskia at gcc dot gnu.org
2024-08-07 21:50 ` pinskia at gcc dot gnu.org
2024-08-20  8:45 ` ktkachov at gcc dot gnu.org
2024-08-20 15:19 ` rsandifo at gcc dot gnu.org
2024-08-20 15:50 ` [Bug rtl-optimization/116238] [12/13/14/15 " ktkachov at gcc dot gnu.org
2024-08-21 16:36 ` cvs-commit at gcc dot gnu.org
2024-08-21 16:37 ` [Bug rtl-optimization/116238] [12/13/14 " rsandifo at gcc dot gnu.org

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