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re PR c/36432 (“incompatible pointer type” with pointer to array as a struct member)

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PR c/36432
	* c-decl.c (grokdeclarator): Don't treat [] declarators in fields
	as indicating flexible array members unless the field itself is
	being declarared as the incomplete array.

testsuite:
	* gcc.dg/c90-flex-array-2.c, gcc.dg/c99-flex-array-6.c: New tests.

From-SVN: r143989
This commit is contained in:
Joseph Myers 2009-02-06 20:12:10 +00:00 • committed by Joseph Myers
parent e901811a8b
commit 1de2c900e0
5 changed files with 55 additions and 2 deletions
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7
gcc/ChangeLog
View file

@ -1,3 +1,10 @@
2009-02-06 Joseph Myers <joseph@codesourcery.com>
PR c/36432
* c-decl.c (grokdeclarator): Don't treat [] declarators in fields
as indicating flexible array members unless the field itself is
being declarared as the incomplete array.
2009-02-06 Jan Hubicka <jh@suse.cz>
PR tree-optimization/38844

15
gcc/c-decl.c
View file

@ -4389,6 +4389,7 @@ grokdeclarator (const struct c_declarator *declarator,
}
else if (decl_context == FIELD)
{
bool flexible_array_member = false;
if (array_parm_vla_unspec_p)
/* Field names can in fact have function prototype
scope so [*] is disallowed here through making
@ -4396,13 +4397,23 @@ grokdeclarator (const struct c_declarator *declarator,
something other than a declaration with function
prototype scope. */
size_varies = 1;
else if (pedantic && !flag_isoc99 && !in_system_header)
else
{
const struct c_declarator *t = declarator;
while (t->kind == cdk_attrs)
t = t->declarator;
flexible_array_member = (t->kind == cdk_id);
}
if (flexible_array_member
&& pedantic && !flag_isoc99 && !in_system_header)
pedwarn (input_location, OPT_pedantic,
"ISO C90 does not support flexible array members");
/* ISO C99 Flexible array members are effectively
identical to GCC's zero-length array extension. */
itype = build_range_type (sizetype, size_zero_node, NULL_TREE);
if (flexible_array_member || array_parm_vla_unspec_p)
itype = build_range_type (sizetype, size_zero_node,
NULL_TREE);
}
else if (decl_context == PARM)
{

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2009-02-06 Joseph Myers <joseph@codesourcery.com>
PR c/36432
* gcc.dg/c90-flex-array-2.c, gcc.dg/c99-flex-array-6.c: New tests.
2009-02-05 Jakub Jelinek <jakub@redhat.com>
PR c++/39106

15
gcc/testsuite/gcc.dg/c90-flex-array-2.c Normal file
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@ -0,0 +1,15 @@
/* [] does not indicate a flexible array member unless it is the field
itself being declared as an incomplete array type rather than a
pointer or other type derived from such a type. PR 36432. */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
void
f (void)
{
int a[3];
int (*p)[];
struct { int (*p)[]; } s;
p = &a;
s.p = &a;
}

15
gcc/testsuite/gcc.dg/c99-flex-array-6.c Normal file
View file

@ -0,0 +1,15 @@
/* [] does not indicate a flexible array member unless it is the field
itself being declared as an incomplete array type rather than a
pointer or other type derived from such a type. PR 36432. */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
void
f (void)
{
int a[3];
int (*p)[];
struct { int (*p)[]; } s;
p = &a;
s.p = &a;
}