[mpich-commits] [mpich] MPICH primary repository branch, master, updated. v3.1rc1-9-gb6d4dde

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http://git.mpich.org/mpich.git/commitdiff/b6d4dde351ff286bbe1e4f059d06654694c4b526

commit b6d4dde351ff286bbe1e4f059d06654694c4b526
Author: Rob Latham <robl at mcs.anl.gov>
Date:   Fri Nov 8 16:25:54 2013 -0600

    make MPIU_Assert more robust
    
    instead of assigning and then checking for overflow, check if the
    overflow will happen, and then assign.
    
    Signed-off-by: Antonio J. Pena <apenya at mcs.anl.gov>

diff --git a/src/include/mpiutil.h b/src/include/mpiutil.h
index f2fbaf0..d6e764d 100644
--- a/src/include/mpiutil.h
+++ b/src/include/mpiutil.h
@@ -239,9 +239,9 @@ int MPIR_Assert_fail_fmt(const char *cond, const char *file_name, int line_num,
 #endif
 #define MPIU_Assign_trunc(dst_,src_,dst_type_)                                         \
     do {                                                                               \
-        dst_ = (dst_type_)(src_);                                                      \
         /* will catch some of the cases if the expr_inttype macros aren't available */ \
-        MPIU_Assert((dst_) == (src_));                                                 \
+        MPIU_Assert((src_) == (dst_type_)(src_));                                      \
+        dst_ = (dst_type_)(src_);                                                      \
     } while (0)
 
 /*

-----------------------------------------------------------------------

Summary of changes:
 src/include/mpiutil.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)


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