http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57617
Bug ID: 57617
Summary: OpenMP critical does not seem to synchronise correctly
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nmm1 at cam dot ac.uk
Created attachment 30305
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30305&action=edit
Gzipped tar file of sources, command to run the test and output
There are some ancient problems that match this (e.g. 45025), but I can't
find a new one. I have written a portable, multi-interface memory
consistency checker for some common 'atomic' paradigms, and one of my tests
finds that gcc -fopenmp isn't behaving. In the attached files, look for
'NOT expected' in output - I will report the store/load one separately.
Regrettably, there is no documentation yet and this is not stripped down,
but the code is structured so that the relevant function's assembler can
be inspected (with -O0 at least). I ran commands to generate output.
If you find a bug in my code, I shan't be surprised :-(
