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* [Bug tree-optimization/104415] New: uninit diagnostic improvement at -O0 @ 2022-02-07 10:10 rguenth at gcc dot gnu.org 2022-02-07 10:10 ` [Bug tree-optimization/104415] " rguenth at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2022-02-07 10:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104415 Bug ID: 104415 Summary: uninit diagnostic improvement at -O0 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: rguenth at gcc dot gnu.org Target Milestone: --- For int foo () { int cond = 1; int tem; return cond ? tem : 0; } we emit t.c: In function 'foo': t.c:5:21: warning: 'tem' may be used uninitialized [-Wmaybe-uninitialized] 5 | return cond ? tem : 0; | ~~~~~~~~~~~^~~ t.c:4:7: note: 'tem' was declared here 4 | int tem; | ^~~ when not optimizing but t.c: In function 'foo': t.c:5:21: warning: 'tem' is used uninitialized [-Wuninitialized] 5 | return cond ? tem : 0; | ~~~~~~~~~~~^~~ t.c:4:7: note: 'tem' was declared here 4 | int tem; | ^~~ when optimizing. Even when not optimizing we could figure out the condition is constant and emit the "is used uninitialized" variant. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/104415] uninit diagnostic improvement at -O0 2022-02-07 10:10 [Bug tree-optimization/104415] New: uninit diagnostic improvement at -O0 rguenth at gcc dot gnu.org @ 2022-02-07 10:10 ` rguenth at gcc dot gnu.org 2022-02-07 20:35 ` pinskia at gcc dot gnu.org 2022-02-10 11:52 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2022-02-07 10:10 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104415 Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Depends on| |104373 --- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- PR104373 mentions how this can be improved. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104373 [Bug 104373] [12 regression] bogus -Wmaybe-uninitialized warning with array new ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/104415] uninit diagnostic improvement at -O0 2022-02-07 10:10 [Bug tree-optimization/104415] New: uninit diagnostic improvement at -O0 rguenth at gcc dot gnu.org 2022-02-07 10:10 ` [Bug tree-optimization/104415] " rguenth at gcc dot gnu.org @ 2022-02-07 20:35 ` pinskia at gcc dot gnu.org 2022-02-10 11:52 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: pinskia at gcc dot gnu.org @ 2022-02-07 20:35 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104415 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2022-02-07 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug tree-optimization/104415] uninit diagnostic improvement at -O0 2022-02-07 10:10 [Bug tree-optimization/104415] New: uninit diagnostic improvement at -O0 rguenth at gcc dot gnu.org 2022-02-07 10:10 ` [Bug tree-optimization/104415] " rguenth at gcc dot gnu.org 2022-02-07 20:35 ` pinskia at gcc dot gnu.org @ 2022-02-10 11:52 ` rguenth at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: rguenth at gcc dot gnu.org @ 2022-02-10 11:52 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104415 Bug 104415 depends on bug 104373, which changed state. Bug 104373 Summary: [12 regression] bogus -Wmaybe-uninitialized warning with array new https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104373 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2022-02-10 11:52 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2022-02-07 10:10 [Bug tree-optimization/104415] New: uninit diagnostic improvement at -O0 rguenth at gcc dot gnu.org 2022-02-07 10:10 ` [Bug tree-optimization/104415] " rguenth at gcc dot gnu.org 2022-02-07 20:35 ` pinskia at gcc dot gnu.org 2022-02-10 11:52 ` rguenth at gcc dot gnu.org
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