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Patched code to generate warning when trying to perform static 

initialization of zero-length arrays.

From-SVN: r36714
This commit is contained in:
Will Cohen 2000-10-04 18:03:33 +00:00 committed by William Cohen
parent 3a4fee6674
commit 4b606faf44
3 changed files with 14 additions and 12 deletions
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19
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2000-10-04 Will Cohen <wcohen@redhat.com>
* c-typeck.c (process_init_element): Added warning for zero-length
array.
* extend.texi (Zero Length): State that static initializers for
zero-length arrays are not allowed.
Mon Oct 2 14:50:14 MET DST 2000 Jan Hubicka <jh@suse.cz>
* rtlanal.c (single_set_1): Do not require USE and CLOBBERs
@ -1139,17 +1147,6 @@ Mon 18-Sep-2000 19:21:35 BST Neil Booth <NeilB@earthling.net>
* config/sh/sh.md (sym_label2reg, symPLT_label2reg): Protect
LABEL_REFs with a PIC-safe unspec.
2000-09-18 Will Cohen <wcohen@redhat.com>
* extend.texi (Zero Length): State that static initializers for
zero-length arrays are not allowed.
* c-typeck.c (process_init_element): Flag initializers for zero
length arrays.
* tree.c (integer_all_onesp): Ignore TREE_INT_CST_HIGH if prec is
exactly HOST_BITS_PERWIDE_INT.
2000-09-18 Joseph S. Myers <jsm28@cam.ac.uk>
* c-common.c (check_format_info): Properly save the argument

3
gcc/c-typeck.c
View File

@ -6460,7 +6460,8 @@ process_init_element (value)
}
if (constructor_max_index != 0
&& tree_int_cst_lt (constructor_max_index, constructor_index))
&& (tree_int_cst_lt (constructor_max_index, constructor_index)
|| integer_all_onesp (constructor_max_index)))
{
pedwarn_init ("excess elements in array initializer");
break;

4
gcc/extend.texi
View File

@ -889,6 +889,10 @@ struct line @{
In standard C, you would have to give @code{contents} a length of 1, which
means either you waste space or complicate the argument to @code{malloc}.
Static initialization of the zero-length array is not allowed. A
warning will be generated for each initializer attempting to initialize
the zero-length array.
@node Variable Length
@section Arrays of Variable Length
@cindex variable-length arrays