[Bug tree-optimization/106433] [13 Regression] ICE in vect_transform_loops, at tree-vectorizer.cc:1032

[asolokha at gmx dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106433

--- Comment #2 from Arseny Solokha <asolokha at gmx dot com> ---
JFTR, I believe I can reproduce the same issue on x86_64 w/ the current gcc
13.0.0 20221023 (g:0e37fd4dc74c1db99cdc7d71ef378e1221253c6f) snapshot:

int m;
int *p;

__attribute__ ((simd)) int
bar (int x)
{
  if (x)
    {
      if (m < 1)
        for (m = 0; m < 1; ++m)
          ++x;

      p = &x;

      for (;;)
        ++m;
    }

  return 0;
}

__attribute__ ((simd)) int
foo (int x)
{
  return bar (x);
}

% x86_64-unknown-linux-gnu-gcc-13 -O2 -c rf5yfvga.c
during GIMPLE pass: vect
rf5yfvga.c: In function 'foo.simdclone.0':
rf5yfvga.c:23:1: internal compiler error: in vect_transform_loops, at
tree-vectorizer.cc:1032
   23 | foo (int x)
      | ^~~
0x7ac573 vect_transform_loops
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221023/work/gcc-13-20221023/gcc/tree-vectorizer.cc:1032
0x11dd81f try_vectorize_loop_1
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221023/work/gcc-13-20221023/gcc/tree-vectorizer.cc:1153
0x11dd81f try_vectorize_loop
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221023/work/gcc-13-20221023/gcc/tree-vectorizer.cc:1183
0x11ddbd4 execute
       
/var/tmp/portage/sys-devel/gcc-13.0.0_p20221023/work/gcc-13-20221023/gcc/tree-vectorizer.cc:1299