public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
* [Bug c/65830] New: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints @ 2015-04-21 13:02 mpolacek at gcc dot gnu.org 2015-04-21 13:03 ` [Bug c/65830] " mpolacek at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-04-21 13:02 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65830 Bug ID: 65830 Summary: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: mpolacek at gcc dot gnu.org When dealing with const ints, the warning can't be suppressed with -Wno-shift-count-negative -Wno-shift-count-overflow. A c-c++-common/ test case: /* PR c/... */ /* { dg-do compile } */ /* { dg-options "-O -Wno-shift-count-negative -Wno-shift-count-overflow" } */ int foo (int x) { const int a = sizeof (int) * __CHAR_BIT__; const int b = -7; int c = 0; c += x << a; /* { dg-bogus "left shift count >= width of type" } */ c += x << b; /* { dg-bogus "left shift count is negative" } */ c += x >> a; /* { dg-bogus "right shift count >= width of type" } */ c += x >> b; /* { dg-bogus "right shift count is negative" } */ return c; } ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/65830] -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints 2015-04-21 13:02 [Bug c/65830] New: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints mpolacek at gcc dot gnu.org @ 2015-04-21 13:03 ` mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-04-21 13:03 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65830 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2015-04-21 Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org Target Milestone|--- |6.0 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Taking. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/65830] -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints 2015-04-21 13:02 [Bug c/65830] New: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints mpolacek at gcc dot gnu.org 2015-04-21 13:03 ` [Bug c/65830] " mpolacek at gcc dot gnu.org @ 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-04-24 11:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65830 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/65830] -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints 2015-04-21 13:02 [Bug c/65830] New: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints mpolacek at gcc dot gnu.org 2015-04-21 13:03 ` [Bug c/65830] " mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org @ 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2015-04-24 11:54 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65830 --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Author: mpolacek Date: Fri Apr 24 11:53:27 2015 New Revision: 222407 URL: https://gcc.gnu.org/viewcvs?rev=222407&root=gcc&view=rev Log: PR c/65830 * c-common.c (c_fully_fold_internal): Use OPT_Wshift_count_negative and OPT_Wshift_count_overflow. * c-c++-common/pr65830.c: New test. Added: trunk/gcc/testsuite/c-c++-common/pr65830.c Modified: trunk/gcc/c-family/ChangeLog trunk/gcc/c-family/c-common.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2015-04-24 11:54 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-04-21 13:02 [Bug c/65830] New: -Wno-shift-count-negative -Wno-shift-count-overflow don't work with const ints mpolacek at gcc dot gnu.org 2015-04-21 13:03 ` [Bug c/65830] " mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org 2015-04-24 11:54 ` mpolacek at gcc dot gnu.org
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).