From 81e99ceb8912aa30cf0b58b8a41f5db9c6218562 Mon Sep 17 00:00:00 2001
From: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 22 Dec 2016 08:53:56 +0000
Subject: [PATCH] 	PR bootstrap/78817 	* vec.h (vec<T, va_heap,
 vl_ptr>::safe_grow_cleared): Revert 	2016-12-15 change.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@243883 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog |  6 ++++++
 gcc/vec.h     | 14 ++++----------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 45743607cdb3..0b3c84f814df 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-12-22  Jakub Jelinek  <jakub@redhat.com>
+
+	PR bootstrap/78817
+	* vec.h (vec<T, va_heap, vl_ptr>::safe_grow_cleared): Revert
+	2016-12-15 change.
+
 2016-12-21  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/78580
diff --git a/gcc/vec.h b/gcc/vec.h
index 3877f2d8ffef..aa93411132b5 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -1607,16 +1607,10 @@ inline void
 vec<T, va_heap, vl_ptr>::safe_grow_cleared (unsigned len MEM_STAT_DECL)
 {
   unsigned oldlen = length ();
-  gcc_checking_assert (oldlen <= len);
-
-  if (size_t sz = sizeof (T) * (len - oldlen))
-    {
-      safe_grow (len PASS_MEM_STAT);
-
-      T *p = address ();
-      gcc_assert (p != NULL);
-      memset (p + oldlen, 0, sz);
-    }
+  size_t sz = sizeof (T) * (len - oldlen);
+  safe_grow (len PASS_MEM_STAT);
+  if (sz != 0)
+    memset (&(address ()[oldlen]), 0, sz);
 }
 
 
-- 
2.11.4.GIT