From: rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Mon, 27 Aug 2018 14:17:03 +0000 (+0000)
Subject: 2018-08-27  Richard Biener  <rguenther@suse.de>
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=745ee4da8da1c8bbcc13b8a3a42448594ea38bb2;p=thirdparty%2Fgcc.git

2018-08-27  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/86927
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
	use const cond reduction code.

	* gcc.dg/vect/pr86927.c: New testcase.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@263888 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 123d76c86804..d27a7a8d78c2 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-08-27  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/86927
+	* tree-vect-loop.c (vect_create_epilog_for_reduction): Properly
+	use const cond reduction code.
+
 2018-08-27  Alexander Monakov  <amonakov@ispras.ru>
 
 	PR tree-optimization/85758
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index aa957ee561bb..8ebadb04e875 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-08-27  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/86927
+	* gcc.dg/vect/pr86927.c: New testcase.
+
 2018-08-27  David Malcolm  <dmalcolm@redhat.com>
 
 	PR 87091
diff --git a/gcc/testsuite/gcc.dg/vect/pr86927.c b/gcc/testsuite/gcc.dg/vect/pr86927.c
new file mode 100644
index 000000000000..794092bc4e4e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/vect/pr86927.c
@@ -0,0 +1,15 @@
+#include "tree-vect.h"
+
+int a[28];
+int main()
+{
+  check_vect ();
+  a[4] = 1;
+  int c = 1;
+  for (int b = 0; b < 8; b++)
+    if (a[b])
+      c = 0;
+  if (c)
+    abort();
+  return 0;
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index d5e35521cefb..124a4be0a675 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -5197,6 +5197,9 @@ vect_create_epilog_for_reduction (vec<tree> vect_defs,
 	  if (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info)
 	      == INTEGER_INDUC_COND_REDUCTION)
 	    code = induc_code;
+	  else if (STMT_VINFO_VEC_REDUCTION_TYPE (stmt_info)
+		   == CONST_COND_REDUCTION)
+	    code = STMT_VINFO_VEC_CONST_COND_REDUC_CODE (stmt_info);
 	  else
 	    code = MAX_EXPR;
 	}