https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102451
Bug ID: 102451
Summary: Suspicious null-pointer dereference in
delete_dead_or_redundant_call
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: fxue at os dot amperecomputing.com
Target Milestone: ---
In the code snippet:
if (lhs)
{
....
if (gsi_replace (gsi, new_stmt, true))
bitmap_set_bit (need_eh_cleanup, gimple_bb (stmt)->index);
}
else
{
....
if (gsi_remove (gsi, true))
bitmap_set_bit (need_eh_cleanup, gimple_bb (stmt)->index);
}
It is known that "gsi" points to "stmt", and gsi_replace/gsi_remove will clear
basic block of "stmt". Then bitmap_set_bit will dereference "index" from null
bb.
