[GENERIC] problem when adding 2 VAR_DEC in the main function

[charfi asma <charfiasma@xxxxxxxx>]

Hello,
after compiling int main () { return 0;} by writing by hend GENERIC tree code, I 
tried to add a var dec in the main function ( int x=10);

1. I added this to my compiler code in the parse_file hook :

tree __glob_decl = build_decl(BUILTINS_LOCATION, VAR_DECL, get_identifier("x"), 
integer_type_node);
TREE_STATIC(__glob_decl) = false;
TREE_PUBLIC(__glob_decl) = true;
DECL_CONTEXT(__glob_decl) = main_fn_decl;
TREE_USED(__glob_decl) = true; 

tree global_set = build2(INIT_EXPR, TREE_TYPE( __glob_decl), __glob_decl, 
build_int_cst(integer_type_node, 10));
TREE_USED(global_set) = true;
append_to_statement_list(global_set, &main_stmts);

layout_decl(__glob_decl, false);
rest_of_decl_compilation(__glob_decl, 1, 0);

VEC_safe_push( tree, gc, global_decls_vec, __glob_decl );

  tree bind = NULL_TREE;
  tree bl = build_block(__glob_decl, NULL_TREE, main_fn_decl, NULL_TREE);
  DECL_INITIAL(main_fn_decl) = bl;
  TREE_USED(bl) = 1;
  bind = build3( BIND_EXPR, void_type_node, BLOCK_VARS(bl), NULL_TREE, bl );
  TREE_SIDE_EFFECTS(bind) = 1;

  BIND_EXPR_BODY(bind) = main_stmts;
  main_stmts = bind;
  DECL_SAVED_TREE(main_fn_decl) = main_stmts;

2. and this code in the write_global hook :

int idx, idy=0, len= VEC_length(tree,global_decls_vec);
  tree itx = NULL_TREE;
  tree * vec = XNEWVEC( tree, len );
  for( idx=0; VEC_iterate(tree,global_decls_vec,idx,itx); ++idx )
    {
      vec[ idy ] = itx;
      idy++;
    }

  wrapup_global_declarations( vec, len );
  check_global_declarations( vec, len );
  emit_debug_global_declarations( vec, len );
  cgraph_finalize_compilation_unit( );

  free( vec );

it compiles and generate the appropriate gimple (just like the gimple generated 
when compiling the same c code using gcc )


main ()
gimple_bind <
  <unnamed-signed:32> D.20;
  <unnamed-signed:32> x;

  gimple_assign <integer_cst, x, 1264, NULL>
  gimple_assign <integer_cst, D.20, 0, NULL>
  gimple_return <D.20>
>


the problem comes when I tried to add another variable in the same function 
main:  int y =5;

I added the same code related to x by changing x and y :

tree __glob_decl2 = build_decl(BUILTINS_LOCATION, VAR_DECL, get_identifier("y"), 
integer_type_node);
TREE_STATIC(__glob_decl2) = false;
TREE_PUBLIC(__glob_decl2) = true;
DECL_CONTEXT(__glob_decl2) = main_fn_decl;
TREE_USED(__glob_decl2) = true; 

tree global_set2 = build2(INIT_EXPR, TREE_TYPE( __glob_decl), __glob_decl, 
build_int_cst(integer_type_node, 5));
TREE_USED(global_set2) = true;
append_to_statement_list(global_set2, &main_stmts);

layout_decl(__glob_decl2, false);
rest_of_decl_compilation(__glob_decl2, 1, 0);

VEC_safe_push( tree, gc, global_decls_vec, __glob_decl2 );

.....

but I get this error while compiling:

[root@is010178 test_gcalc]# guml test.uml -S -fdump-tree-gimple-raw
<built-in>: In function âmainâ:
<built-in>:0:0: internal compiler error: in gimplify_var_or_parm_decl, at 
gimplify.c:1874

it seems that  the function gimplify_var_or_parm_decl consider that I have a 
duplicate declaration.

any idea ?  did I miss sth ??

thank you very much.

Asma