[Bug analyzer/114408] [13 Regression] ICE when invoking strcmp multiple times with -fsanitize=undefined -O1 -fanalyzer -flto

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114408

--- Comment #8 from GCC Commits  ---
The releases/gcc-13 branch has been updated by David Malcolm
:

https://gcc.gnu.org/g:96f7a3694c3e4c72af6258cc9b38bce30e609bee

commit r13-8758-g96f7a3694c3e4c72af6258cc9b38bce30e609bee
Author: David Malcolm 
Date:   Thu May 9 13:09:32 2024 -0400

analyzer: fix ICE and false positive with -Wanalyzer-deref-before-check
[PR114408]

Backported from commit r14-9646-g80a0cb37456c49 (moving testcase to gcc.dg
and handling conflict in kf.cc)

gcc/analyzer/ChangeLog:
PR analyzer/114408
* engine.cc (impl_run_checkers): Free up any dominance info that
we may have created.
* kf.cc (class kf_ubsan_handler): New.
(register_sanitizer_builtins): New.
(register_known_functions): Call register_sanitizer_builtins.

gcc/testsuite/ChangeLog:
PR analyzer/114408
* gcc.dg/analyzer/deref-before-check-pr114408.c: New test.
* c-c++-common/ubsan/analyzer-ice-pr114408.c: New test.

Signed-off-by: David Malcolm 

[Bug analyzer/114408] [13 Regression] ICE when invoking strcmp multiple times with -fsanitize=undefined -O1 -fanalyzer -flto

[dmalcolm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114408

David Malcolm  changed:

   What|Removed |Added

Summary|[13/14 Regression] ICE when |[13 Regression] ICE when
   |invoking strcmp multiple|invoking strcmp multiple
   |times with  |times with
   |-fsanitize=undefined -O1|-fsanitize=undefined -O1
   |-fanalyzer -flto|-fanalyzer -flto

--- Comment #7 from David Malcolm  ---
Should be fixed on trunk by the above patch.

The ICE was introduced by r13-5261-g0d6f7b1dd62e9c9dccb0b9b673f9cc3238b7ea6d
when fixing bug 108455.  Keeping open to track backporting to GCC 13.