[Bug tree-optimization/96974] New: [10/11 Regression] ICE in vect_get_vector_types_for_stmt compiling for SVE

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96974

            Bug ID: 96974
           Summary: [10/11 Regression] ICE in
                    vect_get_vector_types_for_stmt compiling for SVE
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ktkachov at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64*-*-*

The reduced testcase:

float a;

int
b ()
{ return __builtin_lrintf(a); }

struct c {
  float d;
  c() {
    for (int e = 0; e < 9; e++)
      coeffs[e] = d ? b() : 0;
  }
  int coeffs[10];
} f;

ICEs with g++ -Ofast -march=armv8.2-a+sve

during GIMPLE pass: slp
foo.cc: In function '(static initializers for foo.cc)':
foo.cc:14:4: internal compiler error: in vect_get_vector_types_for_stmt, at
tree-vect-stmts.c:12055
   14 | } f;
      |    ^
0x126e44d vect_get_vector_types_for_stmt(vec_info*, _stmt_vec_info*,
tree_node**, tree_node**, unsigned int)
        $SRC/gcc/tree-vect-stmts.c:12054
0x12a7b9a vect_build_slp_tree_1
        $SRC/gcc/tree-vect-slp.c:801
0x12a7b9a vect_build_slp_tree_2
        $SRC/gcc/tree-vect-slp.c:1284
0x12a642b vect_build_slp_tree
        $SRC/gcc/tree-vect-slp.c:1195
0x12a8a30 vect_build_slp_tree_2
        $SRC/gcc/tree-vect-slp.c:1413
0x12a642b vect_build_slp_tree
        $SRC/gcc/tree-vect-slp.c:1195
0x12a8a30 vect_build_slp_tree_2
        $SRC/gcc/tree-vect-slp.c:1413
0x12a642b vect_build_slp_tree
        $SRC/gcc/tree-vect-slp.c:1195
0x12ab23e vect_analyze_slp_instance
        $SRC/gcc/tree-vect-slp.c:2210
0x12aea06 vect_analyze_slp(vec_info*, unsigned int)
        $SRC/gcc/tree-vect-slp.c:2418
0x12b0fc3 vect_slp_analyze_bb_1
        $SRC/gcc/tree-vect-slp.c:3388
0x12b0fc3 vect_slp_region
        $SRC/gcc/tree-vect-slp.c:3498
0x12b0fc3 vect_slp_bb(basic_block_def*)
        $SRC/gcc/tree-vect-slp.c:3628
0x12b4a70 execute
        $SRC/gcc/tree-vectorizer.c:1429
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