https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70214
Bug ID: 70214
Summary: external call is not considered a barrier
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: stsp at users dot sourceforge.net
Target Milestone: ---
Created attachment 37948
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37948&action=edit
a test case
The attached test-case prints "1" when
compiled with -O0, and "0" when compiled
with -O1. I checked with clang - always "1",
no matter what optimization level is.
The bug is that gcc seems to no longer consider
the external function call (pthread_kill() in
this case) as an optimization barrier.
