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On FreeBSD, PTHREADS_THREADS_MAX does not fit into an int, leading to 

warnings similar to the following:

    runtime/src/kmp_global.c:117:35: warning: implicit conversion from
    'unsigned long' to 'int' changes value from 18446744073709551615 to -1
    [-Wconstant-conversion]
    int           __kmp_sys_max_nth = KMP_MAX_NTH;
                  ~~~~~~~~~~~~~~~~~   ^~~~~~~~~~~
    runtime/src/kmp.h:849:34: note: expanded from macro 'KMP_MAX_NTH'
    #    define KMP_MAX_NTH          PTHREAD_THREADS_MAX
                                     ^~~~~~~~~~~~~~~~~~~

Clamp KMP_MAX_NTH to INT_MAX to avoid these warnings.  Also use INT_MAX
whenever PTHREAD_THREADS_MAX is not defined at all.

Differential Revision: http://reviews.llvm.org/D13827

llvm-svn: 250708
This commit is contained in:
Dimitry Andric 2015-10-19 17:32:04 +00:00
parent 3cb667edaa
commit 9b8c353c90
1 changed files with 2 additions and 2 deletions
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4
openmp/runtime/src/kmp.h
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@ -845,10 +845,10 @@ extern int __kmp_place_num_threads_per_core;
#define KMP_MIN_NTH 1
#ifndef KMP_MAX_NTH
# ifdef PTHREAD_THREADS_MAX
# if defined(PTHREAD_THREADS_MAX) && PTHREAD_THREADS_MAX < INT_MAX
# define KMP_MAX_NTH PTHREAD_THREADS_MAX
# else
# define KMP_MAX_NTH (32 * 1024)
# define KMP_MAX_NTH INT_MAX
# endif
#endif /* KMP_MAX_NTH */