Cleanup: put i_maxmin members and ___kmp_size_type into traits_t

Put the duplicated i_maxmin into traits_t by adding new members max_value and
min_value. Put ___kmp_size_type into traits_t by adding member type_size.

Differential Revision: https://reviews.llvm.org/D28847

llvm-svn: 293316
diff --git a/openmp/runtime/src/kmp_dispatch.cpp b/openmp/runtime/src/kmp_dispatch.cpp
index 305839b..00f080d 100644
--- a/openmp/runtime/src/kmp_dispatch.cpp
+++ b/openmp/runtime/src/kmp_dispatch.cpp
@@ -49,34 +49,6 @@
 /* ------------------------------------------------------------------------ */
 /* ------------------------------------------------------------------------ */
 
-// template for type limits
-template< typename T >
-struct i_maxmin {
-    static const T mx;
-    static const T mn;
-};
-template<>
-struct i_maxmin< int > {
-    static const int mx = 0x7fffffff;
-    static const int mn = 0x80000000;
-};
-template<>
-struct i_maxmin< unsigned int > {
-    static const unsigned int mx = 0xffffffff;
-    static const unsigned int mn = 0x00000000;
-};
-template<>
-struct i_maxmin< long long > {
-    static const long long mx = 0x7fffffffffffffffLL;
-    static const long long mn = 0x8000000000000000LL;
-};
-template<>
-struct i_maxmin< unsigned long long > {
-    static const unsigned long long mx = 0xffffffffffffffffLL;
-    static const unsigned long long mn = 0x0000000000000000LL;
-};
-//-------------------------------------------------------------------------
-
 #if KMP_STATIC_STEAL_ENABLED
 
     // replaces dispatch_private_info{32,64} structures and dispatch_private_info{32,64}_t types
@@ -612,7 +584,6 @@
     typedef typename traits_t< T >::unsigned_t  UT;
     typedef typename traits_t< T >::signed_t    ST;
     typedef typename traits_t< T >::floating_t  DBL;
-    static const int ___kmp_size_type = sizeof( UT );
 
     int                                            active;
     T                                              tc;
@@ -688,7 +659,7 @@
     } else {
         pr->nomerge = FALSE;
     }
-    pr->type_size = ___kmp_size_type; // remember the size of variables
+    pr->type_size = traits_t<T>::type_size; // remember the size of variables
     if ( kmp_ord_lower & schedule ) {
         pr->ordered = TRUE;
         schedule = (enum sched_type)(((int)schedule) - (kmp_ord_lower - kmp_sch_lower));
@@ -869,7 +840,7 @@
                 //pr->pfields.parm3 = 0; // it's not used in static_steal
                 pr->u.p.parm4 = (id + 1) % nproc; // remember neighbour tid
                 pr->u.p.st = st;
-                if ( ___kmp_size_type > 4 ) {
+                if ( traits_t<T>::type_size > 4 ) {
                     // AC: TODO: check if 16-byte CAS available and use it to
                     // improve performance (probably wait for explicit request
                     // before spending time on this).
@@ -1438,9 +1409,6 @@
     typedef typename traits_t< T >::unsigned_t  UT;
     typedef typename traits_t< T >::signed_t    ST;
     typedef typename traits_t< T >::floating_t  DBL;
-#if ( KMP_STATIC_STEAL_ENABLED )
-    static const int ___kmp_size_type = sizeof( UT );
-#endif
 
     // This is potentially slightly misleading, schedule(runtime) will appear here even if the actual runtme schedule
     // is static. (Which points out a disadavantage of schedule(runtime): even when static scheduling is used it costs
@@ -1607,7 +1575,7 @@
 
                     trip = pr->u.p.tc - 1;
 
-                    if ( ___kmp_size_type > 4 ) {
+                    if ( traits_t<T>::type_size > 4 ) {
                         // use lock for 8-byte and CAS for 4-byte induction
                         // variable. TODO (optional): check and use 16-byte CAS
                         kmp_lock_t * lck = th->th.th_dispatch->th_steal_lock;
@@ -2224,7 +2192,7 @@
 
             if ( (ST)num_done == th->th.th_team_nproc - 1 ) {
                 #if ( KMP_STATIC_STEAL_ENABLED )
-                if( pr->schedule == kmp_sch_static_steal && ___kmp_size_type > 4 ) {
+                if( pr->schedule == kmp_sch_static_steal && traits_t<T>::type_size > 4 ) {
                     int i;
                     kmp_info_t **other_threads = team->t.t_threads;
                     // loop complete, safe to destroy locks used for stealing
@@ -2400,14 +2368,14 @@
             // Check/correct bounds if needed
             if( incr > 0 ) {
                 if( *pupper < *plower )
-                    *pupper = i_maxmin< T >::mx;
+                    *pupper = traits_t<T>::max_value;
                 if( plastiter != NULL )
                     *plastiter = *plower <= upper && *pupper > upper - incr;
                 if( *pupper > upper )
                     *pupper = upper; // tracker C73258
             } else {
                 if( *pupper > *plower )
-                    *pupper = i_maxmin< T >::mn;
+                    *pupper = traits_t<T>::min_value;
                 if( plastiter != NULL )
                     *plastiter = *plower >= upper && *pupper < upper - incr;
                 if( *pupper < upper )