https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
--- Comment #10 from Vincent Lefèvre ---
A similar bug (all uses of the variable are under some condition) with a
simpler testcase I've just reported: PR107839.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Richard Biener changed:
What|Removed |Added
Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot
gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
--- Comment #9 from Richard Biener ---
This is another example where when doing PHI chaining, we fail to consider the
use predicate of the PHI operand in the final PHI which has now no further
guard before the use.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
--- Comment #8 from Richard Biener ---
The following variant warns with all GCC releases I tested (and -fno-ivopts
fixes it), not exposing a mitigating jump threading opportunity:
int *e;
int f1 (void);
void f2 (int);
long f3 (void *, long,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
--- Comment #7 from Richard Biener ---
This should now be fixed up to the confusion due to IVOPTs. As said the
narrowing is problematic here :/
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Richard Biener changed:
What|Removed |Added
Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot
gnu.org
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Richard Biener changed:
What|Removed |Added
Target Milestone|12.2|12.3
--- Comment #5 from Richard
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Richard Biener changed:
What|Removed |Added
Priority|P3 |P2
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Martin Liška changed:
What|Removed |Added
Keywords|needs-bisection |
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Andrew Pinski changed:
What|Removed |Added
Keywords||needs-bisection
--- Comment #3 from
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
Andrew Pinski changed:
What|Removed |Added
Last reconfirmed||2022-07-01
Keywords|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106155
--- Comment #1 from Vincent Lefèvre ---
I detected the issue on tests/tfpif.c with the upgrade of Debian's package
gcc-snapshot from 1:20220126-1 to 1:20220630-1 (it doesn't occur on
tests/tfpif.c with gcc-snapshot 1:20220126-1). However, the
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