https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105094
Bug ID: 105094
Summary: UBSAN in clear_bit_region(unsigned char*, unsigned
int, unsigned int) (gimple-ssa-store-merging.cc:1834)
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-invalid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: jakub at gcc dot gnu.org
Target Milestone: ---
Happens for:
$ g++ /home/marxin/Programming/gcc/gcc/testsuite/g++.dg/other/pr84964.C -O1
-fstore-merging -fpack-struct -ftrivial-auto-var-init=zero
/home/marxin/Programming/gcc/gcc/testsuite/g++.dg/other/pr84964.C:4:9: warning:
width of ‘a::b’ exceeds its type
4 | short b : -1ULL;
| ^
malloc(): invalid size (unsorted)
malloc(): invalid size (unsorted)
g++: internal compiler error: Aborted signal terminated program cc1plus
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
See <https://gcc.gnu.org/bugs/> for instructions.
Note we emit sorry if I remove any of the options.
