OpenMP/PolyInt: Pass poly-int structures by address to OMP libs.

Currently poly-int type structures are passed by value to OpenMP runtime
functions for shared clauses etc.  This patch improves on this by passing
around poly-int structures by address to avoid copy-overhead.

gcc/ChangeLog:

	* omp-low.cc (use_pointer_for_field): Use pointer if the OMP data
	structure's field type is a poly-int.

diff --git a/gcc/omp-low.cc b/gcc/omp-low.cc
index 4f113df92008ae1a67a740636b48afb2bf368f0b..c36ae38cf8e1f412406554147b0748c5e70ac8a2 100644 (file)
--- a/gcc/omp-low.cc
+++ b/gcc/omp-low.cc
@@ -466,7 +466,8 @@ static bool
 use_pointer_for_field (tree decl, omp_context *shared_ctx)
 {
   if (AGGREGATE_TYPE_P (TREE_TYPE (decl))
-      || TYPE_ATOMIC (TREE_TYPE (decl)))
+      || TYPE_ATOMIC (TREE_TYPE (decl))
+      || POLY_INT_CST_P (DECL_SIZE (decl)))
     return true;
 
   /* We can only use copy-in/copy-out semantics for shared variables