diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/builtins.c | 17 |
2 files changed, 16 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 75ba5a7..718e131 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2004-09-26 Ulrich Weigand <uweigand@de.ibm.com> + + * builtins.c (get_memory_rtx): Set mem attributes for non-ADDR_EXPR + expressions. Always clear MEM_SIZE and alias set. + 2004-09-26 Roger Sayle <roger@eyesopen.com> Giovanni Bajo <giovannibajo@gcc.gnu.org> diff --git a/gcc/builtins.c b/gcc/builtins.c index f3ee9e9..9127f45 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -990,15 +990,20 @@ get_memory_rtx (tree exp) exp = TREE_OPERAND (exp, 0); if (TREE_CODE (exp) == ADDR_EXPR) - { - exp = TREE_OPERAND (exp, 0); - set_mem_attributes (mem, exp, 0); - } + exp = TREE_OPERAND (exp, 0); else if (POINTER_TYPE_P (TREE_TYPE (exp))) + exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp); + else + exp = NULL; + + /* Honor attributes derived from exp, except for the alias set + (as builtin stringops may alias with anything) and the size + (as stringops may access multiple array elements). */ + if (exp) { - exp = build1 (INDIRECT_REF, TREE_TYPE (TREE_TYPE (exp)), exp); - /* memcpy, memset and other builtin stringops can alias with anything. */ + set_mem_attributes (mem, exp, 0); set_mem_alias_set (mem, 0); + set_mem_size (mem, NULL_RTX); } return mem; |