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/* Inspired by part of java/parse.y.

   May be a real bug in CSE. */

/* { dg-do compile } */

/* { dg-options "-O2 -Wall" } */

struct tree

{

    struct tree *car, *cdr, *wfl;

    int code;

    struct { unsigned int renp:1;

      unsigned int rtnp:1;

      unsigned int rpnp:1; } flags;

};

typedef struct tree *tree;

#define NULL_TREE ((tree)0)

/* Codes */

enum

{

    CALL_EXPR, NEW_ARRAY_EXPR, NEW_CLASS_EXPR, CONVERT_EXPR,

    ARRAY_REF, CONDITIONAL_EXPR, STRING_CST, EXPR_WITH_FILE_LOCATION

};

/* Flags */

#define RESOLVE_EXPRESSION_NAME_P(t) ((t)->flags.renp)

#define RESOLVE_TYPE_NAME_P(t) ((t)->flags.rtnp)

#define RESOLVE_PACKAGE_NAME_P(t) ((t)->flags.rpnp)

/* Macros */

#define EXPR_WFL_QUALIFICATION(t) ((t)->wfl)

#define QUAL_WFL(t) ((t)->wfl)

#define EXPR_WFL_NODE(t) ((t)->wfl)

#define TREE_CODE(t) ((t)->code)

#define TREE_OPERAND(t,x) ((t)->car)

#define CLASSTYPE_SUPER(t) ((t)->car)

#define IDENTIFIER_LOCAL_VALUE(t) ((t)->car)

#define TREE_CHAIN(t) ((t)->cdr)

#define QUAL_RESOLUTION(t) ((t)->cdr)

extern tree current_class, this_identifier_node;

extern tree super_identifier_node, length_identifier_node;

tree resolve_and_layout (tree, tree);

tree lookup_field_wrapper (tree, tree);

void

qualify_ambiguous_name (id)

     tree id;

{

  tree qual, qual_wfl, decl;

  tree name;     /* { dg-bogus "name" "uninitialized variable warning" } */

  tree ptr_type; /* { dg-bogus "ptr_type" "uninitialized variable warning" } */

  int again, new_array_found = 0;

  int super_found = 0, this_found = 0;

  qual = EXPR_WFL_QUALIFICATION (id);

  do {

    qual_wfl = QUAL_WFL (qual);

    switch (TREE_CODE (qual_wfl))

      {

      case CALL_EXPR:

        qual_wfl = TREE_OPERAND (qual_wfl, 0);

        if (TREE_CODE (qual_wfl) != EXPR_WITH_FILE_LOCATION)

          {

            qual = EXPR_WFL_QUALIFICATION (qual_wfl);

            qual_wfl = QUAL_WFL (qual);

          }

        break;

      case NEW_ARRAY_EXPR:

        qual = TREE_CHAIN (qual);

        new_array_found = again = 1;

        continue;

      case NEW_CLASS_EXPR:

      case CONVERT_EXPR:

        qual_wfl = TREE_OPERAND (qual_wfl, 0);

        break;

      case ARRAY_REF:

        while (TREE_CODE (qual_wfl) == ARRAY_REF)

          qual_wfl = TREE_OPERAND (qual_wfl, 0);

        break;

      default:

        break;

      }

    name = EXPR_WFL_NODE (qual_wfl);

    ptr_type = current_class;

    again = 0;

  } while (again);

  /* If you put straightforward uses of name and ptr_type here

     instead of the if-else sequence below, the warnings go away.

     Therefore I suspect a real bug. */

  if (!this_found && !super_found && (decl = IDENTIFIER_LOCAL_VALUE (name)))

    {

      RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;

      QUAL_RESOLUTION (qual) = decl;

    }

  else if ((decl = lookup_field_wrapper (ptr_type, name))

           || (new_array_found && name == length_identifier_node))

    {

      RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;

      QUAL_RESOLUTION (qual) = (new_array_found ? NULL_TREE : decl);

    }

  else if ((decl = resolve_and_layout (name, NULL_TREE)))

    {

      RESOLVE_TYPE_NAME_P (qual_wfl) = 1;

      QUAL_RESOLUTION (qual) = decl;

    }

  else if (TREE_CODE (QUAL_WFL (qual)) == CALL_EXPR

           || TREE_CODE (QUAL_WFL (qual)) == ARRAY_REF)

    RESOLVE_EXPRESSION_NAME_P (qual_wfl) = 1;

  else

    RESOLVE_PACKAGE_NAME_P (qual_wfl) = 1;

}