Fix sprintf buffer warning in assemble_name

[Jeff Law]

Until we sort out a reasonable API and implementation for building up 
label strings, this will have to be sufficient.

As outlined earlier this month, when we build up label names, part of 
the name is hidden in the backend, part in the caller.  As a result 
there's no good way to get the length and size the array.

sparc uses more characters than any other in-tree port and as a result 
it could (with sufficient local labels) do an out-of-range write into 
the name array when building a local label.

This patch increases the buffer by one char which is sufficient to avoid 
the problem.

Installing on the trunk.

Jeff
-------------- next part --------------
commit c348c67f8c305df504e88659eecf0f5c9994618a
Author: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Nov 23 22:48:45 2016 +0000

    	* varasm.c (assemble_name): Increase buffer size for name.
    
    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@242810 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 23f2c16..46b023e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,7 @@
 2016-11-23  Jeff Law  <law@redhat.com>
 
+	* varasm.c (assemble_name): Increase buffer size for name.
+
 	* config/spu/spu.md (floatunsdidf2): Remove unused local variable.
 
 2016-11-23  Jakub Kicinski  <jakub.kicinski@netronome.com>
diff --git a/gcc/varasm.c b/gcc/varasm.c
index 2c238950..2a20f64 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -2547,7 +2547,7 @@ assemble_name (FILE *file, const char *name)
 rtx
 assemble_static_space (unsigned HOST_WIDE_INT size)
 {
-  char name[16];
+  char name[17];
   const char *namestring;
   rtx x;