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* [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter @ 2020-10-12 22:12 msebor at gcc dot gnu.org 2020-10-12 22:12 ` [Bug middle-end/97391] " msebor at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: msebor at gcc dot gnu.org @ 2020-10-12 22:12 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97391 Bug ID: 97391 Summary: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: msebor at gcc dot gnu.org Target Milestone: --- Both warnings below are incorrect. $ cat xx.c && gcc -O2 -S -Wall xx.c void f (char a[3][5]) { for (int i = 0; i < 3; i++) for (int j = 0; j < 5; j++) a[i][j] = 0; } xx.c: In function ‘f’: xx.c:5:8: warning: array subscript ‘char[5][0]’ is partly outside array bounds of ‘char[3]’ [-Warray-bounds] 5 | a[i][j] = 0; | ~^~~ xx.c:1:14: note: while referencing ‘a’ 1 | void f (char a[3][5]) | ~~~~~^~~~~~~ xx.c:5:15: warning: ‘__builtin_memset’ forming offset [3, 14] is out of the bounds [0, 3] [-Warray-bounds] 5 | a[i][j] = 0; | ~~~~~~~~^~~ ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/97391] [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter 2020-10-12 22:12 [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter msebor at gcc dot gnu.org @ 2020-10-12 22:12 ` msebor at gcc dot gnu.org 2020-10-13 6:24 ` rguenth at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: msebor at gcc dot gnu.org @ 2020-10-12 22:12 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97391 Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |56456 Assignee|unassigned at gcc dot gnu.org |msebor at gcc dot gnu.org Status|UNCONFIRMED |ASSIGNED Keywords| |diagnostic Last reconfirmed| |2020-10-12 Ever confirmed|0 |1 --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- Looks like a bug in gimple_parm_array_size() that computes the size of function array parameters. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56456 [Bug 56456] [meta-bug] bogus/missing -Warray-bounds ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/97391] [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter 2020-10-12 22:12 [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter msebor at gcc dot gnu.org 2020-10-12 22:12 ` [Bug middle-end/97391] " msebor at gcc dot gnu.org @ 2020-10-13 6:24 ` rguenth at gcc dot gnu.org 2020-10-14 21:37 ` cvs-commit at gcc dot gnu.org 2020-10-14 21:38 ` msebor at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: rguenth at gcc dot gnu.org @ 2020-10-13 6:24 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97391 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Target Milestone|--- |11.0 ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/97391] [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter 2020-10-12 22:12 [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter msebor at gcc dot gnu.org 2020-10-12 22:12 ` [Bug middle-end/97391] " msebor at gcc dot gnu.org 2020-10-13 6:24 ` rguenth at gcc dot gnu.org @ 2020-10-14 21:37 ` cvs-commit at gcc dot gnu.org 2020-10-14 21:38 ` msebor at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: cvs-commit at gcc dot gnu.org @ 2020-10-14 21:37 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97391 --- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Martin Sebor <msebor@gcc.gnu.org>: https://gcc.gnu.org/g:14d83c6f584c321989b43526dc9437de4381aa47 commit r11-3901-g14d83c6f584c321989b43526dc9437de4381aa47 Author: Martin Sebor <msebor@redhat.com> Date: Wed Oct 14 15:19:39 2020 -0600 PR middle-end/97391 - bogus -Warray-bounds accessing a multidimensional array parameter gcc/ChangeLog: PR middle-end/97391 * builtins.c (gimple_parm_array_size): Peel off one less layer of array types. gcc/testsuite/ChangeLog: PR middle-end/97391 * gcc.dg/Warray-bounds-68.c: New test. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/97391] [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter 2020-10-12 22:12 [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter msebor at gcc dot gnu.org ` (2 preceding siblings ...) 2020-10-14 21:37 ` cvs-commit at gcc dot gnu.org @ 2020-10-14 21:38 ` msebor at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: msebor at gcc dot gnu.org @ 2020-10-14 21:38 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97391 Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> --- Fixed in r11-3901. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2020-10-14 21:38 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-10-12 22:12 [Bug middle-end/97391] New: [11 Regression] bogus -Warray-bounds accessing a multidimensional array parameter msebor at gcc dot gnu.org 2020-10-12 22:12 ` [Bug middle-end/97391] " msebor at gcc dot gnu.org 2020-10-13 6:24 ` rguenth at gcc dot gnu.org 2020-10-14 21:37 ` cvs-commit at gcc dot gnu.org 2020-10-14 21:38 ` msebor at gcc dot gnu.org
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