diff options
Diffstat (limited to 'gcc/tree.c')
| -rw-r--r-- | gcc/tree.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/tree.c b/gcc/tree.c index baf4551cadd..de5a1791af1 100644 --- a/gcc/tree.c +++ b/gcc/tree.c @@ -261,6 +261,10 @@ static int next_decl_uid; /* Unique id for next type created. */ static int next_type_uid = 1; +/* The language-specific function for alias analysis. If NULL, the + language does not do any special alias analysis. */ +int (*lang_get_alias_set) PROTO((tree)); + /* Here is how primitive or already-canonicalized types' hash codes are made. */ #define TYPE_HASH(TYPE) ((unsigned long) (TYPE) & 0777777) @@ -1112,6 +1116,9 @@ make_node (code) #ifdef SET_DEFAULT_TYPE_ATTRIBUTES SET_DEFAULT_TYPE_ATTRIBUTES (t); #endif + /* Note that we have not yet computed the alias set for this + type. */ + TYPE_ALIAS_SET (t) = -1; break; case 'c': @@ -5019,3 +5026,17 @@ expr_check (node, ignored, file, line, nofatal) return node; } #endif + +/* Return the alias set for T, which may be either a type or an + expression. */ + +int get_alias_set (t) + tree t; +{ + if (!flag_strict_aliasing || !lang_get_alias_set) + /* If we're not doing any lanaguage-specific alias analysis, just + assume everything aliases everything else. */ + return 0; + else + return (*lang_get_alias_set) (t); +} |
