https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88302
Bug ID: 88302
Summary: __gcov_indirect_call_profiler_v2 and first_run
profiling can be cheaper with LTO
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: hubicka at gcc dot gnu.org
Target Milestone: ---
Currently __gcov_indirect_call_profiler_v2 consumes about 3% of execution of
lto1 with -fprofile-generate during profiledbootstrap. I do not think it is
because we have that many indirect calls at the hot path, but because we add
the prologue to every externally visible function at compile time. It would be
nice to eliminate those that do not have address taken in whole program ;)
