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re PR c/12446 (ICE in emit_move_insn on complicated array reference)

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PR c/12446
	* c-typeck.c (convert_for_assignment): Issue an error for
	array to pointer assignment after default conversion.
	(digest_init): Likewise.

From-SVN: r72096
This commit is contained in:
Eric Botcazou 2003-10-04 20:02:32 +02:00 committed by Eric Botcazou
parent e9ff9b17a7
commit b494fd9851
5 changed files with 58 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2003-10-04 Eric Botcazou <ebotcazou@libertysurf.fr>
PR c/12446
* c-typeck.c (convert_for_assignment): Issue an error for
array to pointer assignment after default conversion.
(digest_init): Likewise.
2003-10-04 Fariborz Jahanian <fjahanian@apple.com>
* c-decl.c (duplicate_decls): retain DECL_COMMON of old declaration

17
gcc/c-typeck.c
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@ -3556,6 +3556,11 @@ convert_for_assignment (tree type, tree rhs, const char *errtype,
errtype, funname, parmnum);
return convert (type, rhs);
}
else if (codel == POINTER_TYPE && coder == ARRAY_TYPE)
{
error ("invalid use of non-lvalue array");
return error_mark_node;
}
else if (codel == POINTER_TYPE && coder == INTEGER_TYPE)
{
/* An explicit constant 0 can convert to a pointer,
@ -4052,8 +4057,16 @@ digest_init (tree type, tree init, int require_constant)
TREE_TYPE (type), COMPARE_STRICT))))
{
if (code == POINTER_TYPE)
inside_init = default_function_array_conversion (inside_init);
{
inside_init = default_function_array_conversion (inside_init);
if (TREE_CODE (TREE_TYPE (inside_init)) == ARRAY_TYPE)
{
error_init ("invalid use of non-lvalue array");
return error_mark_node;
}
}
if (code == VECTOR_TYPE)
/* Although the types are compatible, we may require a
conversion. */

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2003-10-04 Eric Botcazou <ebotcazou@libertysurf.fr>
* gcc.dg/c90-array-lval-6.c: New test.
* gcc.dg/c99-array-lval-6.c: New test.
2003-10-03 Alexander Malmberg <alexander@malmberg.org>
Ziemowit Laski <zlaski@apple.com>

16
gcc/testsuite/gcc.dg/c90-array-lval-6.c Normal file
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@ -0,0 +1,16 @@
/* PR c/12446 */
/* Origin: Keith Thompson <kst@cts.com> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
struct s { char c[1]; };
extern struct s foo(void);
void bar(void)
{
char *ptr = foo().c; /* { dg-bogus "warning" "warning in place of error" } */
}
/* { dg-error "non-lvalue" "array not decaying to lvalue" { target *-*-* } 14 } */

15
gcc/testsuite/gcc.dg/c99-array-lval-6.c Normal file
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@ -0,0 +1,15 @@
/* PR c/12446 */
/* Origin: Keith Thompson <kst@cts.com> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1999 -pedantic-errors" } */
struct s { char c[1]; };
extern struct s foo(void);
void bar(void)
{
char *ptr = foo().c; /* { dg-bogus "non-lvalue" "array not decaying to lvalue" } */
}