OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

c-common.c (c_apply_type_quals_to_decl): Don't crash when `restrict' is applied to a non-pointer variable.

Browse Source 
* c-common.c (c_apply_type_quals_to_decl): Don't crash when
	`restrict' is applied to a non-pointer variable.

From-SVN: r23213
This commit is contained in:
Mark Mitchell 1998-10-21 09:59:32 +00:00 committed by Mark Mitchell
parent 3932261a55
commit 6946bc60bf
2 changed files with 31 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
Wed Oct 21 09:58:51 1998 Mark Mitchell <mark@markmitchell.com>
* c-common.c (c_apply_type_quals_to_decl): Don't crash when
`restrict' is applied to a non-pointer variable.
Wed Oct 21 09:18:58 1998 Mark Mitchell <mark@markmitchell.com>
* invoke.texi: Document -flang-isoc9x.

44
gcc/c-common.c
View File

@ -3037,26 +3037,34 @@ c_apply_type_quals_to_decl (type_quals, decl)
TREE_SIDE_EFFECTS (decl) = 1;
TREE_THIS_VOLATILE (decl) = 1;
}
if ((type_quals & TYPE_QUAL_RESTRICT) && flag_strict_aliasing)
if (type_quals & TYPE_QUAL_RESTRICT)
{
/* No two restricted pointers can point at the same thing.
However, a restricted pointer can point at the same thing as
an unrestricted pointer, if that unrestricted pointer is
based on the restricted pointer. So, we make the alias set
for the restricted pointer a subset of the alias set for the
type pointed to by the type of the decl. */
int pointed_to_alias_set
= get_alias_set (TREE_TYPE (TREE_TYPE (decl)));
if (!pointed_to_alias_set)
/* It's not legal to make a subset of alias set zero. */
;
else
if (!TREE_TYPE (decl)
|| !POINTER_TYPE_P (TREE_TYPE (decl))
|| !C_TYPE_OBJECT_OR_INCOMPLETE_P (TREE_TYPE (TREE_TYPE (decl))))
error ("invalid use of `restrict'");
else if (flag_strict_aliasing)
{
DECL_POINTER_ALIAS_SET (decl) = new_alias_set ();
record_alias_subset (pointed_to_alias_set,
DECL_POINTER_ALIAS_SET (decl));
/* No two restricted pointers can point at the same thing.
However, a restricted pointer can point at the same thing
as an unrestricted pointer, if that unrestricted pointer
is based on the restricted pointer. So, we make the
alias set for the restricted pointer a subset of the
alias set for the type pointed to by the type of the
decl. */
int pointed_to_alias_set
= get_alias_set (TREE_TYPE (TREE_TYPE (decl)));
if (!pointed_to_alias_set)
/* It's not legal to make a subset of alias set zero. */
;
else
{
DECL_POINTER_ALIAS_SET (decl) = new_alias_set ();
record_alias_subset (pointed_to_alias_set,
DECL_POINTER_ALIAS_SET (decl));
}
}
}
}