https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101671
--- Comment #2 from Aldy Hernandez <aldyh at redhat dot com> --- Yeah, that would be great. Thanks! On Thu, Jul 29, 2021 at 6:05 PM msebor at gcc dot gnu.org <gcc-bugzi...@gcc.gnu.org> wrote: > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101671 > > Martin Sebor <msebor at gcc dot gnu.org> changed: > > What |Removed |Added > ---------------------------------------------------------------------------- > CC| |msebor at gcc dot gnu.org > Last reconfirmed| |2021-07-29 > Keywords| |diagnostic > Summary|pr83510 fails because |pr83510 fails with -Os > |threader confuses |because threader confuses > |-Warray-bounds |-Warray-bounds > Ever confirmed|0 |1 > Status|UNCONFIRMED |NEW > > --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- > Confirmed. I've extracted the test case that fails from the bigger test. > Rather than xfailing the whole test I think it would be better to split out > just the failing case and/or xfail just that assertion. Unless you expect the > others to start failing too due to some changes you still have planned? > > $ cat a.c && gcc -Os -S -Wall a.c > extern int f (void); > extern void sink (unsigned int); > > unsigned int a[10]; > > static unsigned int g (int i, int j) > { > if (i == 9) > return j; > else if (i == 10) > return a[i]; // no warning here > return 0; > } > > void test_g (int j) > { > for (int i = 0; i < 10; i++) > { > if (f ()) > sink (g (i, j)); > } > } > > static unsigned int h (int i, int j) > { > switch (i) > { > case 9: > return j; > case 10: > return a[i]; // { dg-bogus "-Warray-bounds" } > } > return 0; > } > > void test_h (int j) > { > for (int i = 0; i < 10; i++) > { > if (f ()) > sink (h (i, j)); > } > } > In function ‘h’, > inlined from ‘test_h’ at a.c:41:2: > a.c:31:15: warning: array subscript 10 is above array bounds of ‘unsigned > int[10]’ [-Warray-bounds] > 31 | return a[i]; // { dg-bogus "-Warray-bounds" } > | ~^~~ > a.c: In function ‘test_h’: > a.c:4:14: note: while referencing ‘a’ > 4 | unsigned int a[10]; > | ^ > > -- > You are receiving this mail because: > You reported the bug. >
