[Bug c/94726] New: internal compiler error: in uniform_vector_p, at tree.c:11214

["anbu1024.me at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94726

            Bug ID: 94726
           Summary: internal compiler error: in uniform_vector_p, at
                    tree.c:11214
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anbu1024.me at gmail dot com
  Target Milestone: ---

$ cat reduced.c 

typedef unsigned int type __attribute__ ( ( vector_size ( 8 ) ) ) ; 

type a , b; 

void foo ( void ) { 
        type var = { 2 , 2 } ; 
        b = __builtin_shuffle ( a , var ) ;
} 


void * a [ ] = { } ; 

--------------------------------------------------------------------------------

$ gcc-10 --version
gcc (GCC) 10.0.1 20200419 (experimental)
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

--------------------------------------------------------------------------------

$ gcc-10 reduced.c 
reduced.c:12:8: error: conflicting types for ‘a’
   12 | void * a [ ] = { } ;
      |        ^
reduced.c:4:6: note: previous declaration of ‘a’ was here
    4 | type a , b;
      |      ^
reduced.c: In function ‘foo’:
reduced.c:8:6: internal compiler error: in uniform_vector_p, at tree.c:11214
    8 |  b = __builtin_shuffle ( a , var ) ;
      |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0x736228 uniform_vector_p(tree_node const*)
        ../../gcc-10-20200419/gcc/tree.c:11214
0x1184786 gimple_vec_same_elem_p(tree_node*, tree_node* (*)(tree_node*))
        /home/john/Documents/fuzz/gcc/10-20200419/build/gcc/gimple-match.c:1002
0x12ab6ca gimple_simplify_VEC_PERM_EXPR
       
/home/john/Documents/fuzz/gcc/10-20200419/build/gcc/gimple-match.c:122872
0x1188bca gimple_resimplify3
        ../../gcc-10-20200419/gcc/gimple-match-head.c:394
0x11d49aa gimple_simplify(gimple*, gimple_match_op*, gimple**, tree_node*
(*)(tree_node*), tree_node* (*)(tree_node*))
        ../../gcc-10-20200419/gcc/gimple-match-head.c:1059
0xad0b2f fold_stmt_1
        ../../gcc-10-20200419/gcc/gimple-fold.c:5087
0xb14771 gimplify_modify_expr
        ../../gcc-10-20200419/gcc/gimplify.c:5942
0xafd53c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-10-20200419/gcc/gimplify.c:13608
0xb00bd6 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-10-20200419/gcc/gimplify.c:6825
0xb03327 gimplify_and_add(tree_node*, gimple**)
        ../../gcc-10-20200419/gcc/gimplify.c:486
0xb03327 internal_get_tmp_var
        ../../gcc-10-20200419/gcc/gimplify.c:642
0xafc8ff get_formal_tmp_var(tree_node*, gimple**)
        ../../gcc-10-20200419/gcc/gimplify.c:663
0xafc8ff gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-10-20200419/gcc/gimplify.c:14609
0xb14595 gimplify_modify_expr
        ../../gcc-10-20200419/gcc/gimplify.c:5792
0xafd53c gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-10-20200419/gcc/gimplify.c:13608
0xb00bd6 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-10-20200419/gcc/gimplify.c:6825
0xafe48b gimplify_statement_list
        ../../gcc-10-20200419/gcc/gimplify.c:1869
0xafe48b gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc-10-20200419/gcc/gimplify.c:14052
0xb00bd6 gimplify_stmt(tree_node**, gimple**)
        ../../gcc-10-20200419/gcc/gimplify.c:6825
0xb0199b gimplify_bind_expr
        ../../gcc-10-20200419/gcc/gimplify.c:1424
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

--------------------------------------------------------------------------------

$ gcc-9 --version
gcc (GCC) 9.2.1 20191102
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

--------------------------------------------------------------------------------

$ gcc-9 reduced.c 
reduced.c:12:8: error: conflicting types for ‘a’
   12 | void * a [ ] = { } ;
      |        ^
reduced.c:4:6: note: previous declaration of ‘a’ was here
    4 | type a , b;
      |      ^