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From: "nsz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111479] New: [12/13 regression] aarch64 SVE
 ICE: in compute_live_loop_exits, at tree-ssa-loop-manip.cc:248
Date: Tue, 19 Sep 2023 13:34:09 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 13.2.1
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111479

            Bug ID: 111479
           Summary: [12/13 regression] aarch64 SVE ICE: in
                    compute_live_loop_exits, at tree-ssa-loop-manip.cc:248
           Product: gcc
           Version: 13.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nsz at gcc dot gnu.org
  Target Milestone: ---

maybe related to bug 111478

$ cat bug.c
float a, b, c;
void *d;
int e, f, g;
void p() {
  float i =3D a;
  for (;;)
    for (e =3D 0; e < g; e++) {
      float j =3D c, k =3D b, l =3D k, h =3D j, m =3D 0.0, n =3D 0.0;
      for (f =3D 0; f < e; f++) {
        float o =3D b;
        m =3D n =3D o;
      }
      ((float *)d)[2 * e] =3D l;
      ((float *)d)[e] =3D h;
      ((float *)d)[2 * e] +=3D m - i * n;
      ((float *)d)[2 * e + 1] +=3D n + i * m;
    }
}

$ gcc -c -O3 -march=3Darmv8-a+sve bug.c
during GIMPLE pass: vect
<source>: In function 'p':
<source>:4:6: internal compiler error: in compute_live_loop_exits, at
tree-ssa-loop-manip.cc:248
    4 | void p() {
      |      ^
0x10ca603 compute_live_loop_exits
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-ssa-loop-mani=
p.cc:248
0x10ca603 add_exit_phis_var
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-ssa-loop-mani=
p.cc:330
0x10ca603 add_exit_phis
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-ssa-loop-mani=
p.cc:391
0x10ca603 rewrite_into_loop_closed_ssa_1
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-ssa-loop-mani=
p.cc:604
0x10ca603 rewrite_into_loop_closed_ssa(bitmap_head*, unsigned int)
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-ssa-loop-mani=
p.cc:626
0x1262514 execute
=20=20=20=20=20=20=20
/data/jenkins/workspace/GNU-toolchain/fsf-13/src/gcc/gcc/tree-vectorizer.cc=
:1361
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.
Compiler returned: 1=