Re: [PATCH] tree-optimization/104970: Limit size computation for access attribute

[Jakub Jelinek <jakub@redhat.com>]

On Thu, Mar 24, 2022 at 08:39:44AM +0530, Siddhesh Poyarekar wrote:
> Limit object size computation only to the simple case where access
> attribute has been explicitly specified.  The object passed to
> __builtin_dynamic_object_size could either be a pointer or a VLA whose
> size has been described only using access attribute.
> 
> Further, return a valid size only if the object is a void * pointer or
> points to (or is a VLA of) a type that has a constant size.
> 
> gcc/ChangeLog:
> 
> 	PR tree-optimization/104970
> 	* tree-object-size.cc (parm_object_size): Restrict size
> 	computation scenarios to explicit access attributes.
> 
> gcc/testsuite/ChangeLog:
> 
> 	PR tree-optimization/104970
> 	* gcc.dg/builtin-dynamic-object-size-0.c (test_parmsz_simple2,
> 	test_parmsz_simple3, test_parmsz_extern, test_parmsz_internal,
> 	test_parmsz_internal2, test_parmsz_internal3): New tests.
> 	(main): Use them.
> 
> Signed-off-by: Siddhesh Poyarekar <siddhesh@gotplt.org>

Ok, thanks.

	Jakub