From: Richard Biener <rguenther@suse.de>
Date: Tue, 19 Nov 2019 07:31:28 +0000 (+0000)
Subject: re PR tree-optimization/92555 (ICE in exact_div, at poly-int.h:2162)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f1e0c7e0eb3eafb122fc3d00242828c82a9286a2;p=gcc.git

re PR tree-optimization/92555 (ICE in exact_div, at poly-int.h:2162)

2019-09-19  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92555
	* tree-vect-loop.c (vect_update_vf_for_slp): Also scan PHIs
	for non-SLP stmts.

	* gcc.dg/vect/pr92555.c: New testcase.

From-SVN: r278430
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ab841a228cb..98f5c2fc49c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-09-19  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/92555
+	* tree-vect-loop.c (vect_update_vf_for_slp): Also scan PHIs
+	for non-SLP stmts.
+
 2019-11-19  Martin Liska  <mliska@suse.cz>
 
 	PR bootstrap/92540
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d258749ef5b..05f38c2acd2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-09-19  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/92555
+	* gcc.dg/vect/pr92555.c: New testcase.
+
 2019-11-19  Joseph Myers  <joseph@codesourcery.com>
 
 	* gcc.dg/c2x-attr-fallthrough-5.c, gcc.dg/c2x-attr-syntax-5.c: New
diff --git a/gcc/testsuite/gcc.dg/vect/pr92555.c b/gcc/testsuite/gcc.dg/vect/pr92555.c
new file mode 100644
index 00000000000..b174e1c612e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr92555.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-fwrapv" } */
+
+signed char rq;
+
+signed char
+pu (int tr, int al)
+{
+  signed char x8;
+
+  while (tr != 0)
+    {
+      for (x8 = 0; x8 >= 0; x8 += 2)
+        ;
+
+      rq ^= al ^ 1;
+      ++x8;
+      ++tr;
+    }
+
+  return x8;
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 02e6bfb9e5d..5ca6b551598 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -1398,6 +1398,18 @@ vect_update_vf_for_slp (loop_vec_info loop_vinfo)
   for (i = 0; i < nbbs; i++)
     {
       basic_block bb = bbs[i];
+      for (gphi_iterator si = gsi_start_phis (bb); !gsi_end_p (si);
+	   gsi_next (&si))
+	{
+	  stmt_vec_info stmt_info = loop_vinfo->lookup_stmt (si.phi ());
+	  if (!stmt_info)
+	    continue;
+	  if ((STMT_VINFO_RELEVANT_P (stmt_info)
+	       || VECTORIZABLE_CYCLE_DEF (STMT_VINFO_DEF_TYPE (stmt_info)))
+	      && !PURE_SLP_STMT (stmt_info))
+	    /* STMT needs both SLP and loop-based vectorization.  */
+	    only_slp_in_loop = false;
+	}
       for (gimple_stmt_iterator si = gsi_start_bb (bb); !gsi_end_p (si);
 	   gsi_next (&si))
 	{