[Bug tree-optimization/87785] New: [9 Regression] ICE in dr_misalignment, at tree-vectorizer.h:1245 on 454.calculix with -Ofast and -flto

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87785

            Bug ID: 87785
           Summary: [9 Regression] ICE in dr_misalignment, at
                    tree-vectorizer.h:1245 on 454.calculix with -Ofast and
                    -flto
           Product: gcc
           Version: 9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---

I see following ICE on a Haswell machine:

during GIMPLE pass: vect
SPOOLES/SubMtx/src/SubMtx_solve.c: In function 'SubMtx_solve':
SPOOLES/SubMtx/src/SubMtx_solve.c:45:1: internal compiler error: in
dr_misalignment, at tree-vectorizer.h:1245
   45 | SubMtx_solve (
      | ^
0x783bf2 dr_misalignment(dr_vec_info*)
        /home/marxin/Programming/gcc/gcc/tree-vectorizer.h:1245
0x784cf4 dr_misalignment(dr_vec_info*)
        /home/marxin/Programming/gcc/gcc/tree.h:3232
0x784cf4 aligned_access_p
        /home/marxin/Programming/gcc/gcc/tree-vectorizer.h:1263
0x784cf4 vect_supportable_dr_alignment(dr_vec_info*, bool)
        /home/marxin/Programming/gcc/gcc/tree-vect-data-refs.c:6324
0xe85f6d vect_get_load_cost(_stmt_vec_info*, int, bool, unsigned int*, unsigned
int*, vec<stmt_info_for_cost, va_heap, vl_ptr>*, vec<stmt_info_for_cost,
va_heap, vl_ptr>*, bool)
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:1231
0xe9f21d vect_model_load_cost
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:1205
0xe9f21d vectorizable_load
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:7595
0xea3ab2 vect_analyze_stmt(_stmt_vec_info*, bool*, _slp_tree*, _slp_instance*,
vec<stmt_info_for_cost, va_heap, vl_ptr>*)
        /home/marxin/Programming/gcc/gcc/tree-vect-stmts.c:9568
0xecc346 vect_slp_analyze_node_operations_1
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2457
0xecc346 vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2504
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xecc23d vect_slp_analyze_node_operations
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2495
0xed09ae vect_slp_analyze_operations(vec_info*)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2536
0xed3371 vect_slp_analyze_bb_1
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2844
0xed3371 vect_slp_bb(basic_block_def*)
        /home/marxin/Programming/gcc/gcc/tree-vect-slp.c:2931
0xed87c9 try_vectorize_loop_1
        /home/marxin/Programming/gcc/gcc/tree-vectorizer.c:926


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163
[Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)