Correct the reported line number in C++ combined OpenACC directives

The C++ FE doesn't set the expr_location of the split acc loop in combined acc
parallel/kernels loop directives. This only happens for with combined
directives, otherwise cp_parser_omp_construct would be responsible for setting
the location. After fixing this bug, I was able to resolve a couple of long
standing diagnostics discrepancies between the C/C++ FEs in the test suite.

	gcc/cp/
	* parser.c (cp_parser_oacc_kernels_parallel): Adjust EXPR_LOCATION
	on the combined acc loop.
	gcc/testsuite/
	* c-c++-common/goacc/combined-directives-3.c: New test.
	* c-c++-common/goacc/loop-2-kernels.c (void K): Adjust test.
	* c-c++-common/goacc/loop-2-parallel.c (void P): Adjust test.
	* c-c++-common/goacc/loop-3.c (void p2): Adjust test.

Reviewed-by: Thomas Schwinge <thomas@codesourcery.com>

From-SVN: r266923

gcc/cp/ChangeLog

+2018-12-09  Cesar Philippidis  <cesar@codesourcery.com>
+
+	* parser.c (cp_parser_oacc_kernels_parallel): Adjust EXPR_LOCATION
+	on the combined acc loop.
+
 2018-12-07  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* decl2.c (grokbitfield): Use DECL_SOURCE_LOCATION in error messages

gcc/cp/parser.c

@@ -38742,8 +38742,9 @@ cp_parser_oacc_kernels_parallel (cp_parser *parser, cp_token *pragma_tok,
 	  cp_lexer_consume_token (parser->lexer);
 	  tree block = begin_omp_parallel ();
 	  tree clauses;
-	  cp_parser_oacc_loop (parser, pragma_tok, p_name, mask, &clauses,
-			       if_p);
+	  tree stmt = cp_parser_oacc_loop (parser, pragma_tok, p_name, mask,
+					   &clauses, if_p);
+	  protected_set_expr_location (stmt, pragma_tok->location);
 	  return finish_omp_construct (code, block, clauses);
 	}
     }

gcc/testsuite/ChangeLog

+2018-12-09  Cesar Philippidis  <cesar@codesourcery.com>
+
+	* c-c++-common/goacc/combined-directives-3.c: New test.
+	* c-c++-common/goacc/loop-2-kernels.c (void K): Adjust test.
+	* c-c++-common/goacc/loop-2-parallel.c (void P): Adjust test.
+	* c-c++-common/goacc/loop-3.c (void p2): Adjust test.
+
 2018-12-09  Thomas Schwinge  <thomas@codesourcery.com>
 
 	* gfortran.dg/goacc/loop-2-kernels.f95: Update.

gcc/testsuite/c-c++-common/goacc/combined-directives-3.c

+/* Verify the accuracy of the line number associated with combined
+   constructs.  */
+
+int
+main ()
+{
+  int x, y, z;
+
+#pragma acc parallel loop seq auto /* { dg-error "'seq' overrides other OpenACC loop specifiers" } */
+  for (x = 0; x < 10; x++)
+#pragma acc loop
+    for (y = 0; y < 10; y++)
+      ;
+
+#pragma acc parallel loop gang auto /* { dg-error "'auto' conflicts with other OpenACC loop specifiers" } */
+  for (x = 0; x < 10; x++)
+#pragma acc loop worker auto /* { dg-error "'auto' conflicts with other OpenACC loop specifiers" } */
+    for (y = 0; y < 10; y++)
+#pragma acc loop vector
+      for (z = 0; z < 10; z++)
+	;
+
+  return 0;
+}

gcc/testsuite/c-c++-common/goacc/loop-2-kernels.c

@@ -147,8 +147,8 @@ void K(void)
 #pragma acc kernels loop worker(num:5)
   for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop seq worker // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc kernels loop seq worker // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
 #pragma acc kernels loop gang worker
   for (i = 0; i < 10; i++)
@@ -163,8 +163,8 @@ void K(void)
 #pragma acc kernels loop vector(length:5)
   for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop seq vector // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc kernels loop seq vector // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
 #pragma acc kernels loop gang vector
   for (i = 0; i < 10; i++)
@@ -176,16 +176,16 @@ void K(void)
 #pragma acc kernels loop auto
   for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop seq auto // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc kernels loop seq auto // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop gang auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc kernels loop gang auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop worker auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc kernels loop worker auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc kernels loop vector auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc kernels loop vector auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
 }

gcc/testsuite/c-c++-common/goacc/loop-2-parallel.c

@@ -117,16 +117,16 @@ void P(void)
   for (i = 0; i < 10; i++)
     { }
 
-#pragma acc parallel loop seq gang // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc parallel loop seq gang // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
 
 #pragma acc parallel loop worker
   for (i = 0; i < 10; i++)
     { }
 
-#pragma acc parallel loop seq worker // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc parallel loop seq worker // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
 #pragma acc parallel loop gang worker
   for (i = 0; i < 10; i++)
@@ -136,8 +136,8 @@ void P(void)
   for (i = 0; i < 10; i++)
     { }
 
-#pragma acc parallel loop seq vector // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc parallel loop seq vector // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
 #pragma acc parallel loop gang vector
   for (i = 0; i < 10; i++)
@@ -149,16 +149,16 @@ void P(void)
 #pragma acc parallel loop auto
   for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop seq auto // { dg-error "'seq' overrides" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'seq' overrides" "" { target c++ } }
+#pragma acc parallel loop seq auto // { dg-error "'seq' overrides" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop gang auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc parallel loop gang auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop worker auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc parallel loop worker auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop vector auto // { dg-error "'auto' conflicts" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "'auto' conflicts" "" { target c++ } }
+#pragma acc parallel loop vector auto // { dg-error "'auto' conflicts" }
+  for (i = 0; i < 10; i++)
     { }
 }

gcc/testsuite/c-c++-common/goacc/loop-3.c

@@ -37,24 +37,24 @@ void p2 (void)
 {
   int i, j;
 
-#pragma acc parallel loop gang(5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop gang(5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop gang(num:5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop gang(num:5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
 
-#pragma acc parallel loop worker(5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop worker(5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop worker(num:5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop worker(num:5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
 
-#pragma acc parallel loop vector(5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop vector(5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
-#pragma acc parallel loop vector(length:5) // { dg-error "argument not permitted" "" { target c } }
-  for (i = 0; i < 10; i++) // { dg-error "argument not permitted" "" { target c++ } }
+#pragma acc parallel loop vector(length:5) // { dg-error "argument not permitted" }
+  for (i = 0; i < 10; i++)
     { }
 }