OSDN Git Service

2011-08-19 Andrew Stubbs <ams@codesourcery.com>
[pf3gnuchains/gcc-fork.git] / gcc / tree-eh.c
index af12b11..f10d72d 100644 (file)
@@ -1336,12 +1336,13 @@ lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
   if (tf->may_fallthru)
     {
       x = gimple_build_assign (finally_tmp,
-                              build_int_cst (NULL, fallthru_index));
+                              build_int_cst (integer_type_node,
+                                             fallthru_index));
       gimple_seq_add_stmt (&tf->top_p_seq, x);
 
-      last_case = build3 (CASE_LABEL_EXPR, void_type_node,
-                         build_int_cst (NULL, fallthru_index),
-                         NULL, create_artificial_label (tf_loc));
+      tmp = build_int_cst (integer_type_node, fallthru_index);
+      last_case = build_case_label (tmp, NULL,
+                                   create_artificial_label (tf_loc));
       VEC_quick_push (tree, case_label_vec, last_case);
       last_case_index++;
 
@@ -1358,15 +1359,15 @@ lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
       emit_post_landing_pad (&eh_seq, tf->region);
 
       x = gimple_build_assign (finally_tmp,
-                              build_int_cst (NULL, eh_index));
+                              build_int_cst (integer_type_node, eh_index));
       gimple_seq_add_stmt (&eh_seq, x);
 
       x = gimple_build_goto (finally_label);
       gimple_seq_add_stmt (&eh_seq, x);
 
-      last_case = build3 (CASE_LABEL_EXPR, void_type_node,
-                         build_int_cst (NULL, eh_index),
-                         NULL, create_artificial_label (tf_loc));
+      tmp = build_int_cst (integer_type_node, eh_index);
+      last_case = build_case_label (tmp, NULL,
+                                   create_artificial_label (tf_loc));
       VEC_quick_push (tree, case_label_vec, last_case);
       last_case_index++;
 
@@ -1397,7 +1398,8 @@ lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
       if (q->index < 0)
        {
          x = gimple_build_assign (finally_tmp,
-                                  build_int_cst (NULL, return_index));
+                                  build_int_cst (integer_type_node,
+                                                 return_index));
          gimple_seq_add_stmt (&mod, x);
          do_return_redirection (q, finally_label, mod, &return_val);
          switch_id = return_index;
@@ -1405,7 +1407,7 @@ lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
       else
        {
          x = gimple_build_assign (finally_tmp,
-                                  build_int_cst (NULL, q->index));
+                                  build_int_cst (integer_type_node, q->index));
          gimple_seq_add_stmt (&mod, x);
          do_goto_redirection (q, finally_label, mod, tf);
          switch_id = q->index;
@@ -1417,9 +1419,9 @@ lower_try_finally_switch (struct leh_state *state, struct leh_tf_state *tf)
         {
           tree case_lab;
           void **slot;
-          case_lab = build3 (CASE_LABEL_EXPR, void_type_node,
-                             build_int_cst (NULL, switch_id),
-                            NULL, create_artificial_label (tf_loc));
+         tmp = build_int_cst (integer_type_node, switch_id);
+          case_lab = build_case_label (tmp, NULL,
+                                      create_artificial_label (tf_loc));
           /* We store the cont_stmt in the pointer map, so that we can recover
              it in the loop below.  */
           if (!cont_map)
@@ -1863,7 +1865,8 @@ lower_eh_constructs_2 (struct leh_state *state, gimple_stmt_iterator *gsi)
                 this zero argument with the current catch region number.  */
              if (state->ehp_region)
                {
-                 tree nr = build_int_cst (NULL, state->ehp_region->index);
+                 tree nr = build_int_cst (integer_type_node,
+                                          state->ehp_region->index);
                  gimple_call_set_arg (stmt, 0, nr);
                }
              else
@@ -2049,7 +2052,7 @@ struct gimple_opt_pass pass_lower_eh =
   PROP_gimple_leh,                     /* properties_provided */
   0,                                   /* properties_destroyed */
   0,                                   /* todo_flags_start */
-  TODO_dump_func                       /* todo_flags_finish */
+  0                                    /* todo_flags_finish */
  }
 };
 \f
@@ -2446,8 +2449,42 @@ tree_could_trap_p (tree expr)
     case CALL_EXPR:
       t = get_callee_fndecl (expr);
       /* Assume that calls to weak functions may trap.  */
-      if (!t || !DECL_P (t) || DECL_WEAK (t))
+      if (!t || !DECL_P (t))
        return true;
+      if (DECL_WEAK (t))
+       return tree_could_trap_p (t);
+      return false;
+
+    case FUNCTION_DECL:
+      /* Assume that accesses to weak functions may trap, unless we know
+        they are certainly defined in current TU or in some other
+        LTO partition.  */
+      if (DECL_WEAK (expr))
+       {
+         struct cgraph_node *node;
+         if (!DECL_EXTERNAL (expr))
+           return false;
+         node = cgraph_function_node (cgraph_get_node (expr), NULL);
+         if (node && node->in_other_partition)
+           return false;
+         return true;
+       }
+      return false;
+
+    case VAR_DECL:
+      /* Assume that accesses to weak vars may trap, unless we know
+        they are certainly defined in current TU or in some other
+        LTO partition.  */
+      if (DECL_WEAK (expr))
+       {
+         struct varpool_node *node;
+         if (!DECL_EXTERNAL (expr))
+           return false;
+         node = varpool_variable_node (varpool_get_node (expr), NULL);
+         if (node && node->in_other_partition)
+           return false;
+         return true;
+       }
       return false;
 
     default:
@@ -2862,7 +2899,7 @@ struct gimple_opt_pass pass_refactor_eh =
   0,                                   /* properties_provided */
   0,                                   /* properties_destroyed */
   0,                                   /* todo_flags_start */
-  TODO_dump_func                       /* todo_flags_finish */
+  0                                    /* todo_flags_finish */
  }
 };
 \f
@@ -2952,10 +2989,10 @@ lower_resx (basic_block bb, gimple stmt, struct pointer_map_t *mnt_map)
       else
        {
          edge_iterator ei;
-         tree dst_nr = build_int_cst (NULL, dst_r->index);
+         tree dst_nr = build_int_cst (integer_type_node, dst_r->index);
 
          fn = implicit_built_in_decls[BUILT_IN_EH_COPY_VALUES];
-         src_nr = build_int_cst (NULL, src_r->index);
+         src_nr = build_int_cst (integer_type_node, src_r->index);
          x = gimple_build_call (fn, 2, dst_nr, src_nr);
          gsi_insert_before (&gsi, x, GSI_SAME_STMT);
 
@@ -2996,7 +3033,7 @@ lower_resx (basic_block bb, gimple stmt, struct pointer_map_t *mnt_map)
       else
        {
          fn = implicit_built_in_decls[BUILT_IN_EH_POINTER];
-         src_nr = build_int_cst (NULL, src_r->index);
+         src_nr = build_int_cst (integer_type_node, src_r->index);
          x = gimple_build_call (fn, 1, src_nr);
          var = create_tmp_var (ptr_type_node, NULL);
          var = make_ssa_name (var, x);
@@ -3068,7 +3105,7 @@ struct gimple_opt_pass pass_lower_resx =
   0,                                   /* properties_provided */
   0,                                   /* properties_destroyed */
   0,                                   /* todo_flags_start */
-  TODO_dump_func | TODO_verify_flow    /* todo_flags_finish */
+  TODO_verify_flow                     /* todo_flags_finish */
  }
 };
 
@@ -3129,8 +3166,8 @@ lower_eh_dispatch (basic_block src, gimple stmt)
                   blocks at the end of this pass.  */
                if (! pointer_set_contains (seen_values, TREE_VALUE (flt_node)))
                  {
-                   tree t = build3 (CASE_LABEL_EXPR, void_type_node,
-                                    TREE_VALUE (flt_node), NULL, lab);
+                   tree t = build_case_label (TREE_VALUE (flt_node),
+                                              NULL, lab);
                    VEC_safe_push (tree, heap, labels, t);
                    pointer_set_insert (seen_values, TREE_VALUE (flt_node));
                    have_label = true;
@@ -3170,15 +3207,15 @@ lower_eh_dispatch (basic_block src, gimple stmt)
        else
          {
            fn = implicit_built_in_decls[BUILT_IN_EH_FILTER];
-           x = gimple_build_call (fn, 1, build_int_cst (NULL, region_nr));
+           x = gimple_build_call (fn, 1, build_int_cst (integer_type_node,
+                                                        region_nr));
            filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)), NULL);
            filter = make_ssa_name (filter, x);
            gimple_call_set_lhs (x, filter);
            gsi_insert_before (&gsi, x, GSI_SAME_STMT);
 
            /* Turn the default label into a default case.  */
-           default_label = build3 (CASE_LABEL_EXPR, void_type_node,
-                                   NULL, NULL, default_label);
+           default_label = build_case_label (NULL, NULL, default_label);
            sort_case_labels (labels);
 
            x = gimple_build_switch_vec (filter, default_label, labels);
@@ -3196,7 +3233,8 @@ lower_eh_dispatch (basic_block src, gimple stmt)
        edge f_e = FALLTHRU_EDGE (src);
 
        fn = implicit_built_in_decls[BUILT_IN_EH_FILTER];
-       x = gimple_build_call (fn, 1, build_int_cst (NULL, region_nr));
+       x = gimple_build_call (fn, 1, build_int_cst (integer_type_node,
+                                                    region_nr));
        filter = create_tmp_var (TREE_TYPE (TREE_TYPE (fn)), NULL);
        filter = make_ssa_name (filter, x);
        gimple_call_set_lhs (x, filter);
@@ -3268,7 +3306,7 @@ struct gimple_opt_pass pass_lower_eh_dispatch =
   0,                                   /* properties_provided */
   0,                                   /* properties_destroyed */
   0,                                   /* todo_flags_start */
-  TODO_dump_func | TODO_verify_flow    /* todo_flags_finish */
+  TODO_verify_flow                     /* todo_flags_finish */
  }
 };
 \f
@@ -3312,6 +3350,19 @@ remove_unreachable_handlers (void)
              SET_BIT (r_reachable, region->index);
              SET_BIT (lp_reachable, lp_nr);
            }
+
+         /* Avoid removing regions referenced from RESX/EH_DISPATCH.  */
+         switch (gimple_code (stmt))
+           {
+           case GIMPLE_RESX:
+             SET_BIT (r_reachable, gimple_resx_region (stmt));
+             break;
+           case GIMPLE_EH_DISPATCH:
+             SET_BIT (r_reachable, gimple_eh_dispatch_region (stmt));
+             break;
+           default:
+             break;
+           }
        }
     }
 
@@ -3998,7 +4049,7 @@ struct gimple_opt_pass pass_cleanup_eh = {
    0,                          /* properties_provided */
    0,                          /* properties_destroyed */
    0,                          /* todo_flags_start */
-   TODO_dump_func              /* todo_flags_finish */
+   0                           /* todo_flags_finish */
    }
 };
 \f