diff options
Diffstat (limited to 'gcc-4.4.3/gcc/tree-ssa-alias.c')
| -rw-r--r-- | gcc-4.4.3/gcc/tree-ssa-alias.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/gcc-4.4.3/gcc/tree-ssa-alias.c b/gcc-4.4.3/gcc/tree-ssa-alias.c index 6d79bff8f..f1ae5c74c 100644 --- a/gcc-4.4.3/gcc/tree-ssa-alias.c +++ b/gcc-4.4.3/gcc/tree-ssa-alias.c @@ -191,6 +191,7 @@ struct alias_info /* Pointers that have been used in an indirect load/store operation. */ struct pointer_set_t *dereferenced_ptrs; + }; @@ -2119,7 +2120,6 @@ delete_alias_info (struct alias_info *ai) delete_points_to_sets (); } - /* Used for hashing to identify pointer infos with identical pt_vars bitmaps. */ @@ -2456,6 +2456,26 @@ create_alias_map_for (tree var, struct alias_info *ai) ai->addressable_vars[ai->num_addressable_vars++] = alias_map; } +/* For indirect reference REF with integer address, create + a .GLOBAL_VAR for it if needed. */ + +static void +create_global_var_for_literal_addr (tree ref) +{ + if (gimple_global_var (cfun) != NULL) + return; + + if (handled_component_p (ref)) + ref = get_base_address (ref); + + if (!ref) + return; + + if (INDIRECT_REF_P (ref) + && TREE_CODE (TREE_OPERAND (ref, 0)) == INTEGER_CST + && !integer_zerop (TREE_OPERAND (ref, 0))) + create_global_var (); +} /* Update related alias information kept in AI. This is used when building name tags, alias sets and deciding grouping heuristics. @@ -2504,7 +2524,17 @@ update_alias_info_1 (gimple stmt, struct alias_info *ai) && TREE_CODE (var) != RESULT_DECL && is_gimple_reg_type (TREE_TYPE (var))) bitmap_set_bit (gimple_addressable_vars (cfun), DECL_UID (var)); + } + + if (lhs) + create_global_var_for_literal_addr (lhs); + if (gimple_code (stmt) == GIMPLE_ASSIGN) + { + tree rhs = gimple_assign_rhs1 (stmt); + + create_global_var_for_literal_addr (rhs); + } } /* Process each operand use. For pointers, determine whether they |