From: Richard Biener <rguenther@suse.de>
Date: Mon, 15 Dec 2014 14:24:06 +0000 (+0000)
Subject: vec.h (vec::safe_grow): Guard against a grow to zero size.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=27a7de71c70787a522bd0706dbcbe95311bde552;p=gcc.git

vec.h (vec::safe_grow): Guard against a grow to zero size.

2014-12-15  Richard Biener  <rguenther@suse.de>

	* vec.h (vec::safe_grow): Guard against a grow to zero size.

From-SVN: r218749
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 3e3eda67b24..90075639ab8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2014-12-15  Richard Biener  <rguenther@suse.de>
+
+	* vec.h (vec::safe_grow): Guard against a grow to zero size.
+
 2014-12-15  Richard Biener  <rguenther@suse.de>
 
 	PR middle-end/64295
diff --git a/gcc/vec.h b/gcc/vec.h
index 2e5313dd146..ca568accdcf 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -1574,7 +1574,10 @@ vec<T, va_heap, vl_ptr>::safe_grow (unsigned len MEM_STAT_DECL)
   unsigned oldlen = length ();
   gcc_checking_assert (oldlen <= len);
   reserve_exact (len - oldlen PASS_MEM_STAT);
-  m_vec->quick_grow (len);
+  if (m_vec)
+    m_vec->quick_grow (len);
+  else
+    gcc_checking_assert (len == 0);
 }