https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114254
Bug ID: 114254
Summary: Indirect inlining through C++ member pointers fails if
the underlying class has a virtual function
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ipa
Assignee: jamborm at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
Target Milestone: ---
Created attachment 57634
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57634&action=edit
testcase
Just adding a virtual method to the class in our test
testsuite/g++.dg/ipa/iinline-2.C and it will unfortunately stop
working.
At some point the C++ FE got clever and stopped emitting the complex
code checking if a member pointer points to a virtual method or a
normal one when the base class does not have any virtual method. But
that meant that our testcases stopped exercising the pattern matching
code in ipa_analyze_indirect_call_uses and when that code changed with
r10-917-g3b47da42de621c (Martin Jambor: Make SRA re-construct original
memory accesses when easy) because of a small mistake, we lost the
intended ability to inline also these cases.
So this is a regression against 9.5, unfortunately.
