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gcc/
[pf3gnuchains/gcc-fork.git] / gcc / gimplify.c
index 03e2ca6..8c2c5ac 100644 (file)
@@ -1109,12 +1109,12 @@ build_stack_save_restore (gimple *save, gimple *restore)
 {
   tree tmp_var;
 
-  *save = gimple_build_call (implicit_built_in_decls[BUILT_IN_STACK_SAVE], 0);
+  *save = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0);
   tmp_var = create_tmp_var (ptr_type_node, "saved_stack");
   gimple_call_set_lhs (*save, tmp_var);
 
   *restore
-    = gimple_build_call (implicit_built_in_decls[BUILT_IN_STACK_RESTORE],
+    = gimple_build_call (builtin_decl_implicit (BUILT_IN_STACK_RESTORE),
                         1, tmp_var);
 }
 
@@ -1329,8 +1329,9 @@ gimplify_vla_decl (tree decl, gimple_seq *seq_p)
   SET_DECL_VALUE_EXPR (decl, t);
   DECL_HAS_VALUE_EXPR_P (decl) = 1;
 
-  t = built_in_decls[BUILT_IN_ALLOCA];
-  t = build_call_expr (t, 1, DECL_SIZE_UNIT (decl));
+  t = builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN);
+  t = build_call_expr (t, 2, DECL_SIZE_UNIT (decl),
+                      size_int (DECL_ALIGN (decl)));
   /* The call has been built for a variable-sized object.  */
   CALL_ALLOCA_FOR_VAR_P (t) = 1;
   t = fold_convert (ptr_type, t);
@@ -1799,7 +1800,6 @@ canonicalize_addr_expr (tree *expr_p)
 static enum gimplify_status
 gimplify_conversion (tree *expr_p)
 {
-  tree tem;
   location_t loc = EXPR_LOCATION (*expr_p);
   gcc_assert (CONVERT_EXPR_P (*expr_p));
 
@@ -1810,17 +1810,6 @@ gimplify_conversion (tree *expr_p)
   if (tree_ssa_useless_type_conversion (*expr_p))
     *expr_p = TREE_OPERAND (*expr_p, 0);
 
-  /* Attempt to avoid NOP_EXPR by producing reference to a subtype.
-     For example this fold (subclass *)&A into &A->subclass avoiding
-     a need for statement.  */
-  if (CONVERT_EXPR_P (*expr_p)
-      && POINTER_TYPE_P (TREE_TYPE (*expr_p))
-      && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (*expr_p, 0)))
-      && (tem = maybe_fold_offset_to_address
-         (EXPR_LOCATION (*expr_p), TREE_OPERAND (*expr_p, 0),
-          integer_zero_node, TREE_TYPE (*expr_p))) != NULL_TREE)
-    *expr_p = tem;
-
   /* If we still have a conversion at the toplevel,
      then canonicalize some constructs.  */
   if (CONVERT_EXPR_P (*expr_p))
@@ -2208,7 +2197,7 @@ gimplify_self_mod_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
   /* For POINTERs increment, use POINTER_PLUS_EXPR.  */
   if (POINTER_TYPE_P (TREE_TYPE (lhs)))
     {
-      rhs = fold_convert_loc (loc, sizetype, rhs);
+      rhs = convert_to_ptrofftype_loc (loc, rhs);
       if (arith_code == MINUS_EXPR)
        rhs = fold_build1_loc (loc, NEGATE_EXPR, TREE_TYPE (rhs), rhs);
       arith_code = POINTER_PLUS_EXPR;
@@ -2860,18 +2849,23 @@ gimple_boolify (tree expr)
 
     case TRUTH_NOT_EXPR:
       TREE_OPERAND (expr, 0) = gimple_boolify (TREE_OPERAND (expr, 0));
-      /* FALLTHRU */
 
-    case EQ_EXPR: case NE_EXPR:
-    case LE_EXPR: case GE_EXPR: case LT_EXPR: case GT_EXPR:
       /* These expressions always produce boolean results.  */
-      TREE_TYPE (expr) = boolean_type_node;
+      if (TREE_CODE (type) != BOOLEAN_TYPE)
+       TREE_TYPE (expr) = boolean_type_node;
       return expr;
 
     default:
+      if (COMPARISON_CLASS_P (expr))
+       {
+         /* There expressions always prduce boolean results.  */
+         if (TREE_CODE (type) != BOOLEAN_TYPE)
+           TREE_TYPE (expr) = boolean_type_node;
+         return expr;
+       }
       /* Other expressions that get here must have boolean values, but
         might need to be converted to the appropriate mode.  */
-      if (type == boolean_type_node)
+      if (TREE_CODE (type) == BOOLEAN_TYPE)
        return expr;
       return fold_convert_loc (loc, boolean_type_node, expr);
     }
@@ -3217,7 +3211,7 @@ gimplify_modify_expr_to_memcpy (tree *expr_p, tree size, bool want_value,
   to_ptr = build_fold_addr_expr_loc (loc, to);
   gimplify_arg (&to_ptr, seq_p, loc);
 
-  t = implicit_built_in_decls[BUILT_IN_MEMCPY];
+  t = builtin_decl_implicit (BUILT_IN_MEMCPY);
 
   gs = gimple_build_call (t, 3, to_ptr, from_ptr, size);
 
@@ -3264,7 +3258,7 @@ gimplify_modify_expr_to_memset (tree *expr_p, tree size, bool want_value,
 
   to_ptr = build_fold_addr_expr_loc (loc, to);
   gimplify_arg (&to_ptr, seq_p, loc);
-  t = implicit_built_in_decls[BUILT_IN_MEMSET];
+  t = builtin_decl_implicit (BUILT_IN_MEMSET);
 
   gs = gimple_build_call (t, 3, to_ptr, integer_zero_node, size);
 
@@ -4478,6 +4472,7 @@ gimplify_modify_expr_complex_part (tree *expr_p, gimple_seq *pre_p,
 
   ocode = code == REALPART_EXPR ? IMAGPART_EXPR : REALPART_EXPR;
   other = build1 (ocode, TREE_TYPE (rhs), lhs);
+  TREE_NO_WARNING (other) = 1;
   other = get_formal_tmp_var (other, pre_p);
 
   realpart = code == REALPART_EXPR ? rhs : other;
@@ -4686,7 +4681,7 @@ gimplify_variable_sized_compare (tree *expr_p)
   arg = SUBSTITUTE_PLACEHOLDER_IN_EXPR (arg, op0);
   src = build_fold_addr_expr_loc (loc, op1);
   dest = build_fold_addr_expr_loc (loc, op0);
-  t = implicit_built_in_decls[BUILT_IN_MEMCMP];
+  t = builtin_decl_implicit (BUILT_IN_MEMCMP);
   t = build_call_expr_loc (loc, t, 3, dest, src, arg);
 
   expr
@@ -5927,6 +5922,7 @@ gimplify_scan_omp_clauses (tree *list_p, gimple_seq *pre_p,
            }
          break;
 
+       case OMP_CLAUSE_FINAL:
        case OMP_CLAUSE_IF:
          OMP_CLAUSE_OPERAND (c, 0)
            = gimple_boolify (OMP_CLAUSE_OPERAND (c, 0));
@@ -5943,6 +5939,7 @@ gimplify_scan_omp_clauses (tree *list_p, gimple_seq *pre_p,
        case OMP_CLAUSE_ORDERED:
        case OMP_CLAUSE_UNTIED:
        case OMP_CLAUSE_COLLAPSE:
+       case OMP_CLAUSE_MERGEABLE:
          break;
 
        case OMP_CLAUSE_DEFAULT:
@@ -6083,6 +6080,8 @@ gimplify_adjust_omp_clauses (tree *list_p)
        case OMP_CLAUSE_DEFAULT:
        case OMP_CLAUSE_UNTIED:
        case OMP_CLAUSE_COLLAPSE:
+       case OMP_CLAUSE_FINAL:
+       case OMP_CLAUSE_MERGEABLE:
          break;
 
        default:
@@ -6485,24 +6484,45 @@ static enum gimplify_status
 gimplify_omp_atomic (tree *expr_p, gimple_seq *pre_p)
 {
   tree addr = TREE_OPERAND (*expr_p, 0);
-  tree rhs = TREE_OPERAND (*expr_p, 1);
+  tree rhs = TREE_CODE (*expr_p) == OMP_ATOMIC_READ
+            ? NULL : TREE_OPERAND (*expr_p, 1);
   tree type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (addr)));
   tree tmp_load;
+  gimple loadstmt, storestmt;
 
-   tmp_load = create_tmp_reg (type, NULL);
-   if (goa_stabilize_expr (&rhs, pre_p, addr, tmp_load) < 0)
-     return GS_ERROR;
+  tmp_load = create_tmp_reg (type, NULL);
+  if (rhs && goa_stabilize_expr (&rhs, pre_p, addr, tmp_load) < 0)
+    return GS_ERROR;
 
-   if (gimplify_expr (&addr, pre_p, NULL, is_gimple_val, fb_rvalue)
-       != GS_ALL_DONE)
-     return GS_ERROR;
+  if (gimplify_expr (&addr, pre_p, NULL, is_gimple_val, fb_rvalue)
+      != GS_ALL_DONE)
+    return GS_ERROR;
 
-   gimplify_seq_add_stmt (pre_p, gimple_build_omp_atomic_load (tmp_load, addr));
-   if (gimplify_expr (&rhs, pre_p, NULL, is_gimple_val, fb_rvalue)
-       != GS_ALL_DONE)
-     return GS_ERROR;
-   gimplify_seq_add_stmt (pre_p, gimple_build_omp_atomic_store (rhs));
-   *expr_p = NULL;
+  loadstmt = gimple_build_omp_atomic_load (tmp_load, addr);
+  gimplify_seq_add_stmt (pre_p, loadstmt);
+  if (rhs && gimplify_expr (&rhs, pre_p, NULL, is_gimple_val, fb_rvalue)
+      != GS_ALL_DONE)
+    return GS_ERROR;
+
+  if (TREE_CODE (*expr_p) == OMP_ATOMIC_READ)
+    rhs = tmp_load;
+  storestmt = gimple_build_omp_atomic_store (rhs);
+  gimplify_seq_add_stmt (pre_p, storestmt);
+  switch (TREE_CODE (*expr_p))
+    {
+    case OMP_ATOMIC_READ:
+    case OMP_ATOMIC_CAPTURE_OLD:
+      *expr_p = tmp_load;
+      gimple_omp_atomic_set_need_value (loadstmt);
+      break;
+    case OMP_ATOMIC_CAPTURE_NEW:
+      *expr_p = rhs;
+      gimple_omp_atomic_set_need_value (storestmt);
+      break;
+    default:
+      *expr_p = NULL;
+      break;
+    }
 
    return GS_ALL_DONE;
 }
@@ -7225,6 +7245,9 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
          }
 
        case OMP_ATOMIC:
+       case OMP_ATOMIC_READ:
+       case OMP_ATOMIC_CAPTURE_OLD:
+       case OMP_ATOMIC_CAPTURE_NEW:
          ret = gimplify_omp_atomic (expr_p, pre_p);
          break;
 
@@ -7233,8 +7256,10 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
        case TRUTH_XOR_EXPR:
          {
            tree orig_type = TREE_TYPE (*expr_p);
+           tree new_type, xop0, xop1;
            *expr_p = gimple_boolify (*expr_p);
-           if (!useless_type_conversion_p (orig_type, TREE_TYPE (*expr_p)))
+           new_type = TREE_TYPE (*expr_p);
+           if (!useless_type_conversion_p (orig_type, new_type))
              {
                *expr_p = fold_convert_loc (input_location, orig_type, *expr_p);
                ret = GS_OK;
@@ -7258,46 +7283,55 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
              default:
                break;
              }
-
+           /* Now make sure that operands have compatible type to
+              expression's new_type.  */
+           xop0 = TREE_OPERAND (*expr_p, 0);
+           xop1 = TREE_OPERAND (*expr_p, 1);
+           if (!useless_type_conversion_p (new_type, TREE_TYPE (xop0)))
+             TREE_OPERAND (*expr_p, 0) = fold_convert_loc (input_location,
+                                                           new_type,
+                                                           xop0);
+           if (!useless_type_conversion_p (new_type, TREE_TYPE (xop1)))
+             TREE_OPERAND (*expr_p, 1) = fold_convert_loc (input_location,
+                                                           new_type,
+                                                           xop1);
            /* Continue classified as tcc_binary.  */
            goto expr_2;
          }
 
        case FMA_EXPR:
+       case VEC_PERM_EXPR:
          /* Classified as tcc_expression.  */
          goto expr_3;
 
        case POINTER_PLUS_EXPR:
-          /* Convert ((type *)A)+offset into &A->field_of_type_and_offset.
-            The second is gimple immediate saving a need for extra statement.
-          */
-         if (TREE_CODE (TREE_OPERAND (*expr_p, 1)) == INTEGER_CST
-             && (tmp = maybe_fold_offset_to_address
-                 (EXPR_LOCATION (*expr_p),
-                  TREE_OPERAND (*expr_p, 0), TREE_OPERAND (*expr_p, 1),
-                  TREE_TYPE (*expr_p))))
-           {
-             *expr_p = tmp;
-             ret = GS_OK;
-             break;
-           }
-         /* Convert (void *)&a + 4 into (void *)&a[1].  */
-         if (TREE_CODE (TREE_OPERAND (*expr_p, 0)) == NOP_EXPR
-             && TREE_CODE (TREE_OPERAND (*expr_p, 1)) == INTEGER_CST
-             && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (*expr_p,
-                                                                       0),0)))
-             && (tmp = maybe_fold_offset_to_address
-                 (EXPR_LOCATION (*expr_p),
-                  TREE_OPERAND (TREE_OPERAND (*expr_p, 0), 0),
-                  TREE_OPERAND (*expr_p, 1),
-                  TREE_TYPE (TREE_OPERAND (TREE_OPERAND (*expr_p, 0),
-                                           0)))))
-            {
-               *expr_p = fold_convert (TREE_TYPE (*expr_p), tmp);
-              ret = GS_OK;
-              break;
-            }
-          /* FALLTHRU */
+         {
+           enum gimplify_status r0, r1;
+           r0 = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p,
+                               post_p, is_gimple_val, fb_rvalue);
+           r1 = gimplify_expr (&TREE_OPERAND (*expr_p, 1), pre_p,
+                               post_p, is_gimple_val, fb_rvalue);
+           recalculate_side_effects (*expr_p);
+           ret = MIN (r0, r1);
+           /* Convert &X + CST to invariant &MEM[&X, CST].  Do this
+              after gimplifying operands - this is similar to how
+              it would be folding all gimplified stmts on creation
+              to have them canonicalized, which is what we eventually
+              should do anyway.  */
+           if (TREE_CODE (TREE_OPERAND (*expr_p, 1)) == INTEGER_CST
+               && is_gimple_min_invariant (TREE_OPERAND (*expr_p, 0)))
+             {
+               *expr_p = build_fold_addr_expr_with_type_loc
+                  (input_location,
+                   fold_build2 (MEM_REF, TREE_TYPE (TREE_TYPE (*expr_p)),
+                                TREE_OPERAND (*expr_p, 0),
+                                fold_convert (ptr_type_node,
+                                              TREE_OPERAND (*expr_p, 1))),
+                   TREE_TYPE (*expr_p));
+               ret = MIN (ret, GS_OK);
+             }
+           break;
+         }
 
        default:
          switch (TREE_CODE_CLASS (TREE_CODE (*expr_p)))
@@ -7315,8 +7349,23 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
                {
                  tree type = TREE_TYPE (TREE_OPERAND (*expr_p, 1));
 
-                 if (!AGGREGATE_TYPE_P (type))
+                 /* Vector comparisons need no boolification.  */
+                 if (TREE_CODE (type) == VECTOR_TYPE)
                    goto expr_2;
+                 else if (!AGGREGATE_TYPE_P (type))
+                   {
+                     tree org_type = TREE_TYPE (*expr_p);
+                     *expr_p = gimple_boolify (*expr_p);
+                     if (!useless_type_conversion_p (org_type,
+                                                     TREE_TYPE (*expr_p)))
+                       {
+                         *expr_p = fold_convert_loc (input_location,
+                                                     org_type, *expr_p);
+                         ret = GS_OK;
+                       }
+                     else
+                       goto expr_2;
+                   }
                  else if (TYPE_MODE (type) != BLKmode)
                    ret = gimplify_scalar_mode_aggregate_compare (expr_p);
                  else
@@ -7944,24 +7993,24 @@ gimplify_function_tree (tree fndecl)
       tree tmp_var;
       gimple call;
 
-      x = implicit_built_in_decls[BUILT_IN_RETURN_ADDRESS];
+      x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
       call = gimple_build_call (x, 1, integer_zero_node);
       tmp_var = create_tmp_var (ptr_type_node, "return_addr");
       gimple_call_set_lhs (call, tmp_var);
       gimplify_seq_add_stmt (&cleanup, call);
-      x = implicit_built_in_decls[BUILT_IN_PROFILE_FUNC_EXIT];
+      x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_EXIT);
       call = gimple_build_call (x, 2,
                                build_fold_addr_expr (current_function_decl),
                                tmp_var);
       gimplify_seq_add_stmt (&cleanup, call);
       tf = gimple_build_try (seq, cleanup, GIMPLE_TRY_FINALLY);
 
-      x = implicit_built_in_decls[BUILT_IN_RETURN_ADDRESS];
+      x = builtin_decl_implicit (BUILT_IN_RETURN_ADDRESS);
       call = gimple_build_call (x, 1, integer_zero_node);
       tmp_var = create_tmp_var (ptr_type_node, "return_addr");
       gimple_call_set_lhs (call, tmp_var);
       gimplify_seq_add_stmt (&body, call);
-      x = implicit_built_in_decls[BUILT_IN_PROFILE_FUNC_ENTER];
+      x = builtin_decl_implicit (BUILT_IN_PROFILE_FUNC_ENTER);
       call = gimple_build_call (x, 2,
                                build_fold_addr_expr (current_function_decl),
                                tmp_var);