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re PR c/28280 (bogus "statement with no effect" warning with VLA and typeof)

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PR c/28280
	* c-parser.c (c_parser_typeof_specifier): Don't use
	c_finish_expr_stmt, open code desired semantics instead.

From-SVN: r116163
This commit is contained in:
Mike Stump 2006-08-15 18:01:19 +00:00 • committed by Mike Stump
parent d47e3adf1d
commit 4adb785d44
3 changed files with 28 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-07-15 Mike Stump <mrs@apple.com>
PR c/28280
* c-parser.c (c_parser_typeof_specifier): Don't use
c_finish_expr_stmt, open code desired semantics instead.
2006-08-15 Nick Clifton <nickc@redhat.com>
* config.gcc (x86-mingw32): Add a gthr-win32.h including makefile

14
gcc/c-parser.c
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@ -2164,7 +2164,19 @@ c_parser_typeof_specifier (c_parser *parser)
is evaluated, this can be evaluated. For now, we avoid
evaluation when the context might. */
if (!skip_evaluation && was_vm)
c_finish_expr_stmt (expr.value);
{
tree e = expr.value;
/* If the expression is not of a type to which we cannot assign a line
number, wrap the thing in a no-op NOP_EXPR. */
if (DECL_P (e) || CONSTANT_CLASS_P (e))
e = build1 (NOP_EXPR, void_type_node, e);
if (EXPR_P (e))
SET_EXPR_LOCATION (e, input_location);
add_stmt (e);
}
pop_maybe_used (was_vm);
}
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");

9
gcc/testsuite/gcc.dg/vla-9.c Normal file
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@ -0,0 +1,9 @@
/* { dg-do compile } */
/* { dg-options "-std=c99 -pedantic-errors -W -Wall" } */
/* PR c/28280 */
void f(__SIZE_TYPE__ d)
{
typedef int t[d];
t *g = (__typeof (g)) d;
}