public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug c/101838] New: sizeof of struct with array of unspecified bound folded to constant @ 2021-08-10 5:57 muecker at gwdg dot de 2021-08-10 21:17 ` [Bug c/101838] " muecker at gwdg dot de ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: muecker at gwdg dot de @ 2021-08-10 5:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101838 Bug ID: 101838 Summary: sizeof of struct with array of unspecified bound folded to constant Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: muecker at gwdg dot de Target Milestone: --- In this example the size of is folded to zero: int foo(struct { int z[*]; } v, int (*y)[sizeof v]); c_vla_type_p should probably be replaced by C_VARIABLE_SIZE in c_expr_sizeof_type. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/101838] sizeof of struct with array of unspecified bound folded to constant 2021-08-10 5:57 [Bug c/101838] New: sizeof of struct with array of unspecified bound folded to constant muecker at gwdg dot de @ 2021-08-10 21:17 ` muecker at gwdg dot de 2021-08-12 18:37 ` cvs-commit at gcc dot gnu.org 2021-08-14 17:47 ` muecker at gwdg dot de 2 siblings, 0 replies; 4+ messages in thread From: muecker at gwdg dot de @ 2021-08-10 21:17 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101838 --- Comment #1 from Martin Uecker <muecker at gwdg dot de> --- Actually, the example before might have been fixed already, but these two are still wrong: int bar( struct f { int a[*]; } v, int (*b)[sizeof(struct f)] // folded to zero ); int foo(void) { int n = 0; return sizeof(typeof(*({ n = 10; struct foo { int x[n]; } x; &x; }))); } int main() { if (sizeof(struct foo { int x[10]; }) != foo()) __builtin_abort(); return 0; } ~ ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/101838] sizeof of struct with array of unspecified bound folded to constant 2021-08-10 5:57 [Bug c/101838] New: sizeof of struct with array of unspecified bound folded to constant muecker at gwdg dot de 2021-08-10 21:17 ` [Bug c/101838] " muecker at gwdg dot de @ 2021-08-12 18:37 ` cvs-commit at gcc dot gnu.org 2021-08-14 17:47 ` muecker at gwdg dot de 2 siblings, 0 replies; 4+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2021-08-12 18:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101838 --- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Uecker <uecker@gcc.gnu.org>: https://gcc.gnu.org/g:d2ba65ab6010f0d507bf5512a0223692e6653b23 commit r12-2882-gd2ba65ab6010f0d507bf5512a0223692e6653b23 Author: Martin Uecker <muecker@gwdg.de> Date: Thu Aug 12 20:32:16 2021 +0200 Evaluate type arguments of sizeof that are structs of variable size [PR101838] Evaluate type arguments of sizeof for all types of variable size and not just for VLAs. This fixes PR101838 and some issues related to PR29970 where statement expressions need to be evaluated so that the size is well defined. 2021-08-12 Martin Uecker <muecker@gwdg.de> gcc/c/ PR c/101838 PR c/29970 * c-typeck.c (c_expr_sizeof_type): Evaluate size expressions for structs of variable size. gcc/testsuite/ PR c/101838 * gcc.dg/vla-stexp-2.c: New test. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/101838] sizeof of struct with array of unspecified bound folded to constant 2021-08-10 5:57 [Bug c/101838] New: sizeof of struct with array of unspecified bound folded to constant muecker at gwdg dot de 2021-08-10 21:17 ` [Bug c/101838] " muecker at gwdg dot de 2021-08-12 18:37 ` cvs-commit at gcc dot gnu.org @ 2021-08-14 17:47 ` muecker at gwdg dot de 2 siblings, 0 replies; 4+ messages in thread From: muecker at gwdg dot de @ 2021-08-14 17:47 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101838 Martin Uecker <muecker at gwdg dot de> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Martin Uecker <muecker at gwdg dot de> --- Fixed on trunk. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-08-14 17:47 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2021-08-10 5:57 [Bug c/101838] New: sizeof of struct with array of unspecified bound folded to constant muecker at gwdg dot de 2021-08-10 21:17 ` [Bug c/101838] " muecker at gwdg dot de 2021-08-12 18:37 ` cvs-commit at gcc dot gnu.org 2021-08-14 17:47 ` muecker at gwdg dot de
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).