[nvptx] Enable large vectors

Allow vector_length clauses to accept values larger than warp size.  Note that
this does not enable setting vector_length to values larger than warp size using
-fopenacc-dim.

2019-01-12  Tom de Vries  <tdevries@suse.de>

	* config/nvptx/nvptx.c (nvptx_goacc_validate_dims): Take larger vector
	lengths into account.

	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c: Expect
	vector length to be 128.
	* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Expect vector
	length 2097152 to be reduced to 1024 instead of 32.

From-SVN: r267889

gcc/ChangeLog

+2019-01-12  Tom de Vries  <tdevries@suse.de>
+
+	* config/nvptx/nvptx.c (nvptx_goacc_validate_dims): Take larger vector
+	lengths into account.
+
 2019-01-12  Svante Signell  <svante.signell@gmail.com>
 
 	* config/i386/gnu.h (TARGET_THREAD_SSP_OFFSET): Define.

gcc/config/nvptx/nvptx.c

@@ -96,7 +96,7 @@
 #define PTX_NUM_PER_WORKER_BARRIERS (PTX_CTA_NUM_BARRIERS - PTX_NUM_PER_CTA_BARRIERS)
 
 #define PTX_DEFAULT_VECTOR_LENGTH PTX_WARP_SIZE
-#define PTX_MAX_VECTOR_LENGTH PTX_WARP_SIZE
+#define PTX_MAX_VECTOR_LENGTH PTX_CTA_SIZE
 #define PTX_WORKER_LENGTH 32
 #define PTX_DEFAULT_RUNTIME_DIM 0 /* Defer to runtime.  */
 

libgomp/ChangeLog

+2019-01-12  Tom de Vries  <tdevries@suse.de>
+
+	* testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c: Expect
+	vector length to be 128.
+	* testsuite/libgomp.oacc-c-c++-common/parallel-dims.c: Expect vector
+	length 2097152 to be reduced to 1024 instead of 32.
+
 2019-01-11  Thomas Schwinge  <thomas@codesourcery.com>
             James Norris  <jnorris@codesourcery.com>
 

libgomp/testsuite/libgomp.oacc-c-c++-common/parallel-dims.c

@@ -350,7 +350,7 @@ int main ()
     int gangs_min, gangs_max, workers_min, workers_max, vectors_min, vectors_max;
     gangs_min = workers_min = vectors_min = INT_MAX;
     gangs_max = workers_max = vectors_max = INT_MIN;
-#pragma acc parallel copy (vectors_actual) /* { dg-warning "using vector_length \\(32\\), ignoring 2097152" "" { target openacc_nvidia_accel_configured } } */ \
+#pragma acc parallel copy (vectors_actual) /* { dg-warning "using vector_length \\(1024\\), ignoring 2097152" "" { target openacc_nvidia_accel_configured } } */ \
   vector_length (VECTORS)
     {
       if (acc_on_device (acc_device_host))
@@ -361,7 +361,7 @@ int main ()
       else if (acc_on_device (acc_device_nvidia))
 	{
 	  /* The GCC nvptx back end enforces vector_length (32).  */
-	  vectors_actual = 32;
+	  vectors_actual = 1024;
 	}
       else
 	__builtin_abort ();

libgomp/testsuite/libgomp.oacc-c-c++-common/vector-length-128-1.c

@@ -33,7 +33,6 @@ main (void)
 
   return 0;
 }
-/* { dg-prune-output "using vector_length \\(32\\), ignoring 128" } */
 
-/* { dg-final { scan-offload-tree-dump "__attribute__\\(\\(oacc function \\(1, 1, 32\\)" "oaccdevlow" } } */
-/* { dg-output "nvptx_exec: kernel main\\\$_omp_fn\\\$0: launch gangs=1, workers=1, vectors=32" } */
+/* { dg-final { scan-offload-tree-dump "__attribute__\\(\\(oacc function \\(1, 1, 128\\)" "oaccdevlow" } } */
+/* { dg-output "nvptx_exec: kernel main\\\$_omp_fn\\\$0: launch gangs=1, workers=1, vectors=128" } */