tree-optimization/113073 - amend PR112736 fix

The PR112736 testcase fails on RISC-V because the aligned exception
uses the wrong check.  The alignment support scheme can be
dr_aligned even when the access isn't aligned to the vector size
but some targets are happy with element alignment.  The following
fixes that.

	PR tree-optimization/113073
	* tree-vect-stmts.cc (vectorizable_load): Properly ensure
	to exempt only vector-size aligned overreads.

diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index fc6923cf68a4d376649d12116687e612473360b6..e9ff728dfd40c2f69b9ae33ae90d5e3b153c1d38 100644 (file)
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -11476,7 +11476,9 @@ vectorizable_load (vec_info *vinfo,
                                      - (group_size * vf - gap), nunits))
                          /* DR will be unused.  */
                          ltype = NULL_TREE;
-                       else if (alignment_support_scheme == dr_aligned)
+                       else if (known_ge (vect_align,
+                                          tree_to_poly_uint64
+                                            (TYPE_SIZE_UNIT (vectype))))
                          /* Aligned access to excess elements is OK if
                             at least one element is accessed in the
                             scalar loop.  */