commit 840989c113433c069f54872d7e051e1572202326
Author: Andreas Arnez <arnez@linux.vnet.ibm.com>
Date:   Tue Jun 13 15:20:30 2017 +0200

    read/write_pieced_value: Drop 'buffer_size' variable
    
    When the variable 'buffer_size' in read_pieced_value and
    write_pieced_value was introduced, it was needed for tracking the buffer's
    allocated size.  Now that the buffer's data type has been changed to a
    std::vector, the variable is no longer necessary; so remove it.
    
    gdb/ChangeLog:
    
            * dwarf2loc.c (read_pieced_value): Remove buffer_size variable.
            (write_pieced_value): Likewise.

### a/gdb/ChangeLog
### b/gdb/ChangeLog
## -1,5 +1,10 @@
 2017-06-13  Andreas Arnez  <arnez@linux.vnet.ibm.com>
 
+	* dwarf2loc.c (read_pieced_value): Remove buffer_size variable.
+	(write_pieced_value): Likewise.
+
+2017-06-13  Andreas Arnez  <arnez@linux.vnet.ibm.com>
+
 	* dwarf2loc.c (write_pieced_value): When writing to a bit-field,
 	transfer the source value's least significant bits, instead of its
 	lowest-addressed ones.  Rename type_len to max_offset.
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -1761,7 +1761,6 @@ read_pieced_value (struct value *v)
   gdb_byte *contents;
   struct piece_closure *c
     = (struct piece_closure *) value_computed_closure (v);
-  size_t buffer_size = 0;
   std::vector<gdb_byte> buffer;
   int bits_big_endian
     = gdbarch_bits_big_endian (get_type_arch (value_type (v)));
@@ -1806,12 +1805,8 @@ read_pieced_value (struct value *v)
 	this_size_bits = max_offset - offset;
 
       this_size = (this_size_bits + source_offset_bits % 8 + 7) / 8;
+      buffer.reserve (this_size);
       source_offset = source_offset_bits / 8;
-      if (buffer_size < this_size)
-	{
-	  buffer_size = this_size;
-	  buffer.reserve (buffer_size);
-	}
       intermediate_buffer = buffer.data ();
 
       /* Copy from the source to DEST_BUFFER.  */
@@ -1929,7 +1924,6 @@ write_pieced_value (struct value *to, struct value *from)
   const gdb_byte *contents;
   struct piece_closure *c
     = (struct piece_closure *) value_computed_closure (to);
-  size_t buffer_size = 0;
   std::vector<gdb_byte> buffer;
   int bits_big_endian
     = gdbarch_bits_big_endian (get_type_arch (value_type (to)));
@@ -1988,11 +1982,7 @@ write_pieced_value (struct value *to, struct value *from)
 	}
       else
 	{
-	  if (buffer_size < this_size)
-	    {
-	      buffer_size = this_size;
-	      buffer.reserve (buffer_size);
-	    }
+	  buffer.reserve (this_size);
 	  source_buffer = buffer.data ();
 	  need_bitwise = 1;
 	}