[Bug middle-end/50950] warning missed when OR'ing to an uninitialized variable
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50950 --- Comment #1 from Richard Guenther 2011-11-02 09:48:16 UTC --- No, it's the lame warning-for-uninitialized-memory (your variables are address-taken) code that triggered in 4.4 but not in newer releases. Thus it's more related to PR50040. Note that I don't think we should warn for bitwise OR with 1 (but we should for bitwise AND), the testcase will simply make one bit initialized, not using any uninitialized info. Thus not warning for this particular case is good.
[Bug middle-end/50950] warning missed when OR'ing to an uninitialized variable
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50950 Richard Guenther changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution||DUPLICATE --- Comment #2 from Richard Guenther 2011-11-02 09:49:45 UTC --- A dup actually (fixed on trunk): t.c: In function 'f0': t.c:14:5: warning: 'x' is used uninitialized in this function [-Wuninitialized] t.c: In function 'f1': t.c:22:11: warning: 'x.i32.i' is used uninitialized in this function [-Wuninitialized] t.c: In function 'ff1': t.c:30:5: warning: 'x' is used uninitialized in this function [-Wuninitialized] t.c: In function 'ff2': t.c:40:11: warning: 'y.i32.i' is used uninitialized in this function [-Wuninitialized] even better than for 4.4. *** This bug has been marked as a duplicate of bug 50040 ***
[Bug middle-end/50950] warning missed when OR'ing to an uninitialized variable
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50950 --- Comment #3 from Ozkan Sezer 2011-11-02 11:29:20 UTC --- (In reply to comment #2) > A dup actually (fixed on trunk): > Thank you. Can we expect a backport of the fix to 4.5 and 4.6? > t.c: In function 'f0': > t.c:14:5: warning: 'x' is used uninitialized in this function > [-Wuninitialized] > t.c: In function 'f1': > t.c:22:11: warning: 'x.i32.i' is used uninitialized in this function > [-Wuninitialized] > t.c: In function 'ff1': > t.c:30:5: warning: 'x' is used uninitialized in this function > [-Wuninitialized] > t.c: In function 'ff2': > t.c:40:11: warning: 'y.i32.i' is used uninitialized in this function > [-Wuninitialized] > > even better than for 4.4. Hmm, the warning is still selectively emitted only for the first uninitialized variable, though.
