From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 14 Oct 2019 11:47:15 +0000 (+0000)
Subject: 2019-10-14  Richard Biener  <rguenther@suse.de>
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3ddb10c1de30e4d5e03ea3f0727b888289777f7a;p=thirdparty%2Fgcc.git

2019-10-14  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/92069
	* tree-vect-loop.c (vect_analyze_scalar_cycles_1): For nested
	cycles do not set vect_nested_cycle on the latch definition.

	* gcc.dg/torture/pr92069.c: New testcase.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@276959 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e755803b12c1..c2cbd4274ca1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-10-14  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/92069
+	* tree-vect-loop.c (vect_analyze_scalar_cycles_1): For nested
+	cycles do not set vect_nested_cycle on the latch definition.
+
 2019-10-14  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* function-abi.h (expr_callee_abi): Declare.
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 13988f87736f..281da7ff85e2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2019-10-14  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/92069
+	* gcc.dg/torture/pr92069.c: New testcase.
+
 2019-10-14  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* g++.dg/cpp0x/constexpr-union5.C: Test location(s) too.
diff --git a/gcc/testsuite/gcc.dg/torture/pr92069.c b/gcc/testsuite/gcc.dg/torture/pr92069.c
new file mode 100644
index 000000000000..806ff5fba144
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr92069.c
@@ -0,0 +1,19 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-ftree-vectorize" } */
+
+unsigned int a, c, d;
+double b;
+void e()
+{
+  for (; d; d++)
+    {
+      double f;
+      a = 2;
+      for (; a; a++)
+	{
+	  c = b;
+	  b = f;
+	  f = c;
+	}
+    }
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index cb95ea362988..de018acefad3 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -584,7 +584,6 @@ vect_analyze_scalar_cycles_1 (loop_vec_info loop_vinfo, class loop *loop)
 				     "Detected vectorizable nested cycle.\n");
 
                   STMT_VINFO_DEF_TYPE (stmt_vinfo) = vect_nested_cycle;
-		  STMT_VINFO_DEF_TYPE (reduc_stmt_info) = vect_nested_cycle;
                 }
               else
                 {