[gomp4] backport an acc directive matching cleanup for fortran

[Cesar Philippidis <cesar at codesourcery dot com>]

This patch contains a backport of the fortran OpenACC directive matching
changes I made to trunk here
<https://gcc.gnu.org/ml/gcc-patches/2016-06/msg01286.html>. It's not a
clean backport because gomp4 has some support for the device_type clause
which is missing in trunk.

Next I plan to backport Jakub's OpenMP 4.5 fortran changes to gomp4.

Cesar

2017-01-03  Cesar Philippidis  <cesar@codesourcery.com>

	gcc/fortran/
	* openmp.c (match_acc): New function.
	(gfc_match_oacc_parallel_loop): Simplify by calling match_acc.
	(gfc_match_oacc_parallel): Likewise.
	(gfc_match_oacc_kernels_loop): Likewise.
	(gfc_match_oacc_kernels): Likewise.
	(gfc_match_oacc_data): Likewise.
	(gfc_match_oacc_host_data): Likewise.
	(gfc_match_oacc_loop): Likewise.
	(gfc_match_oacc_enter_data): likewise.
	(gfc_match_oacc_exit_data): Likewise.


diff --git a/gcc/fortran/openmp.c b/gcc/fortran/openmp.c
index 0a9d137..61940d7 100644
--- a/gcc/fortran/openmp.c
+++ b/gcc/fortran/openmp.c
@@ -1565,112 +1565,72 @@ gfc_match_omp_clauses (gfc_omp_clauses **cp, uint64_t mask,
 #define OACC_UPDATE_CLAUSE_DEVICE_TYPE_MASK				   \
    (OMP_CLAUSE_ASYNC | OMP_CLAUSE_WAIT | OMP_CLAUSE_DEVICE_TYPE)
 
-
-match
-gfc_match_oacc_parallel_loop (void)
+static match
+match_acc (gfc_exec_op op, uint64_t mask, uint64_t dmask)
 {
   gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_PARALLEL_LOOP_CLAUSES,
-			     OACC_PARALLEL_CLAUSE_DEVICE_TYPE_MASK
-			     | OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK, false,
-			     false, true) != MATCH_YES)
+
+  if (gfc_match_omp_clauses (&c, mask, dmask, false, false, true) != MATCH_YES)
     return MATCH_ERROR;
 
-  new_st.op = EXEC_OACC_PARALLEL_LOOP;
+  new_st.op = op;
   new_st.ext.omp_clauses = c;
   return MATCH_YES;
 }
 
+match
+gfc_match_oacc_parallel_loop (void)
+{
+  return match_acc (EXEC_OACC_PARALLEL_LOOP, OACC_PARALLEL_LOOP_CLAUSES,
+		    OACC_PARALLEL_CLAUSE_DEVICE_TYPE_MASK
+		    | OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK);
+}
+
 
 match
 gfc_match_oacc_parallel (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_PARALLEL_CLAUSES,
-			     OACC_PARALLEL_CLAUSE_DEVICE_TYPE_MASK, false,
-			     false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_PARALLEL;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_PARALLEL, OACC_PARALLEL_CLAUSES,
+		    OACC_PARALLEL_CLAUSE_DEVICE_TYPE_MASK);
 }
 
 
 match
 gfc_match_oacc_kernels_loop (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_KERNELS_LOOP_CLAUSES,
-			     OACC_KERNELS_CLAUSE_DEVICE_TYPE_MASK
-			     | OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK, false,
-			     false, true) != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_KERNELS_LOOP;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_KERNELS_LOOP, OACC_KERNELS_LOOP_CLAUSES,
+		    OACC_KERNELS_CLAUSE_DEVICE_TYPE_MASK
+		    | OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK);
 }
 
 
 match
 gfc_match_oacc_kernels (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_KERNELS_CLAUSES,
-			     OACC_KERNELS_CLAUSE_DEVICE_TYPE_MASK, false,
-			     false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_KERNELS;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_KERNELS, OACC_KERNELS_CLAUSES,
+		    OACC_KERNELS_CLAUSE_DEVICE_TYPE_MASK);
 }
 
 
 match
 gfc_match_oacc_data (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_DATA_CLAUSES, 0, false, false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_DATA;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_DATA, OACC_DATA_CLAUSES, 0);
 }
 
 
 match
 gfc_match_oacc_host_data (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_HOST_DATA_CLAUSES, 0, false, false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_HOST_DATA;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_HOST_DATA, OACC_HOST_DATA_CLAUSES, 0);
 }
 
 
 match
 gfc_match_oacc_loop (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_LOOP_CLAUSES,
-			     OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK, false, false,
-			     true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_LOOP;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_LOOP, OACC_LOOP_CLAUSES,
+		    OACC_LOOP_CLAUSE_DEVICE_TYPE_MASK);
 }
 
 
@@ -1791,28 +1751,14 @@ gfc_match_oacc_update (void)
 match
 gfc_match_oacc_enter_data (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_ENTER_DATA_CLAUSES, 0, false, false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_ENTER_DATA;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_ENTER_DATA, OACC_ENTER_DATA_CLAUSES, 0);
 }
 
 
 match
 gfc_match_oacc_exit_data (void)
 {
-  gfc_omp_clauses *c;
-  if (gfc_match_omp_clauses (&c, OACC_EXIT_DATA_CLAUSES, 0, false, false, true)
-      != MATCH_YES)
-    return MATCH_ERROR;
-
-  new_st.op = EXEC_OACC_EXIT_DATA;
-  new_st.ext.omp_clauses = c;
-  return MATCH_YES;
+  return match_acc (EXEC_OACC_EXIT_DATA, OACC_EXIT_DATA_CLAUSES, 0);
 }