Pass the data vector mode to get_mask_mode

This patch passes the data vector mode to get_mask_mode, rather than its
size and nunits.  This is a bit simpler and allows targets to distinguish
between modes that happen to have the same size and number of elements.

2019-11-14  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (get_mask_mode): Take a vector mode itself as argument,
	instead of properties about the vector mode.
	* doc/tm.texi: Regenerate.
	* targhooks.h (default_get_mask_mode): Update to reflect new
	get_mode_mask interface.
	* targhooks.c (default_get_mask_mode): Likewise.  Use
	related_int_vector_mode.
	* optabs-query.c (can_vec_mask_load_store_p): Update call
	to get_mask_mode.
	* tree-vect-stmts.c (check_load_store_masking): Likewise, checking
	first that the original mode really is a vector.
	* tree.c (build_truth_vector_type_for): Likewise.
	* config/aarch64/aarch64.c (aarch64_get_mask_mode): Update for new
	get_mode_mask interface.
	(aarch64_expand_sve_vcond): Update call accordingly.
	* config/gcn/gcn.c (gcn_vectorize_get_mask_mode): Update for new
	get_mode_mask interface.
	* config/i386/i386.c (ix86_get_mask_mode): Likewise.

From-SVN: r278233

1 files changed, 4 insertions, 4 deletions

diff --git a/gcc/tree.c b/gcc/tree.c
index 61b95c9..4db3fa8 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -10894,15 +10894,15 @@ build_truth_vector_type_for_mode (poly_uint64 nunits, machine_mode mask_mode)
 static tree
 build_truth_vector_type_for (tree vectype)
 {
+  machine_mode vector_mode = TYPE_MODE (vectype);
   poly_uint64 nunits = TYPE_VECTOR_SUBPARTS (vectype);
-  poly_uint64 vector_size = tree_to_poly_uint64 (TYPE_SIZE_UNIT (vectype));
 
   machine_mode mask_mode;
-  if (targetm.vectorize.get_mask_mode (nunits,
-				       vector_size).exists (&mask_mode))
+  if (VECTOR_MODE_P (vector_mode)
+      && targetm.vectorize.get_mask_mode (vector_mode).exists (&mask_mode))
     return build_truth_vector_type_for_mode (nunits, mask_mode);
 
-  poly_uint64 vsize = vector_size * BITS_PER_UNIT;
+  poly_uint64 vsize = tree_to_poly_uint64 (TYPE_SIZE (vectype));
   unsigned HOST_WIDE_INT esize = vector_element_size (vsize, nunits);
   tree bool_type = build_nonstandard_boolean_type (esize);