http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50675
Bug #: 50675
Summary: master and single OpenMP constructs broken
Classification: Unclassified
Product: gcc
Version: 4.6.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: markflorisso...@gmail.com
single and master do not work properly in loops. They are either not executed
as often as they should, or the program deadlocks entirely:
#include <stdio.h>
int main(int argc, char **argv) {
int i;
#pragma omp parallel
{
for (i = 0; i < 10; i++) {
#pragma omp single
puts("hello");
}
}
return 0;
}
This program deadlocks in gcc 4.4 and 4.6, whereas in 4.2 is is only executed 4
times (which is the number of cores on my machine). The same goes for the
master construct.
