From: Jakub Jelinek <jakub@redhat.com>
Date: Sun, 5 Jul 2015 12:14:41 +0000 (+0200)
Subject: re PR tree-optimization/66718 (Non-invariant ADDR_EXPR not vectorized)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3cc2fa2a17d7d3b72d2140306686c827612234d0;p=gcc.git

re PR tree-optimization/66718 (Non-invariant ADDR_EXPR not vectorized)

	PR tree-optimization/66718
	* tree-vect-stmts.c (vectorizable_call): Replace uses of
	GOMP_SIMD_LANE outside of loop with vf - 1 rather than 0.

From-SVN: r225434
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4ccf4396074..13f9ba75dc4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2015-07-05  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/66718
+	* tree-vect-stmts.c (vectorizable_call): Replace uses of
+	GOMP_SIMD_LANE outside of loop with vf - 1 rather than 0.
+
 	PR tree-optimization/66718
 	* tree-vect-stmts.c (vectorizable_assignment, vectorizable_store,
 	vectorizable_load, vectorizable_condition): Move vectype,
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index c6565228d08..5ac70231f3e 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -2601,6 +2601,30 @@ vectorizable_call (gimple gs, gimple_stmt_iterator *gsi, gimple *vec_stmt,
     lhs = gimple_call_lhs (STMT_VINFO_RELATED_STMT (stmt_info));
   else
     lhs = gimple_call_lhs (stmt);
+
+  if (gimple_call_internal_p (stmt)
+      && gimple_call_internal_fn (stmt) == IFN_GOMP_SIMD_LANE)
+    {
+      /* Replace uses of the lhs of GOMP_SIMD_LANE call outside the loop
+	 with vf - 1 rather than 0, that is the last iteration of the
+	 vectorized loop.  */
+      imm_use_iterator iter;
+      use_operand_p use_p;
+      gimple use_stmt;
+      FOR_EACH_IMM_USE_STMT (use_stmt, iter, lhs)
+	{
+	  basic_block use_bb = gimple_bb (use_stmt);
+	  if (use_bb
+	      && !flow_bb_inside_loop_p (LOOP_VINFO_LOOP (loop_vinfo), use_bb))
+	    {
+	      FOR_EACH_IMM_USE_ON_STMT (use_p, iter)
+		SET_USE (use_p, build_int_cst (TREE_TYPE (lhs),
+					       ncopies * nunits_out - 1));
+	      update_stmt (use_stmt);
+	    }
+	}
+    }
+
   new_stmt = gimple_build_assign (lhs, build_zero_cst (type));
   set_vinfo_for_stmt (new_stmt, stmt_info);
   set_vinfo_for_stmt (stmt, NULL);