[PATCH][committed] Update comment in gimple-ssa-store-merging.c

[Kyrill Tkachov]

Hi all,

Jakub replaced the simple loop zeroing parts of the array in a previous patch.
This patchlet just adjusts the comment to be a bit more accurate.

Committed as obvious.

Thanks,
Kyrill

2017-07-14  Kyrylo Tkachov  <kyrylo.tkac...@arm.com>

    * gimple-ssa-store-merging.c (clear_bit_region): Replace reference to
    loop in comment with memset.

diff --git a/gcc/gimple-ssa-store-merging.c b/gcc/gimple-ssa-store-merging.c
index 17a95a50b1fee8ae989343fe63955ab5c045f43b..05b8cd9516a3f863a0f8ce598a69ab8f52a1c441 100644
--- a/gcc/gimple-ssa-store-merging.c
+++ b/gcc/gimple-ssa-store-merging.c
@@ -331,8 +331,8 @@ clear_bit_region (unsigned char *ptr, unsigned int start,
   else if (start == 0 && len > BITS_PER_UNIT)
     {
       unsigned int nbytes = len / BITS_PER_UNIT;
-      /* We could recurse on each byte but do the loop here to avoid
-	 recursing too deep.  */
+      /* We could recurse on each byte but we clear whole bytes, so a simple
+	 memset will do.  */
       memset (ptr, '\0', nbytes);
       /* Clear the remaining sub-byte region if there is one.  */
       if (len % BITS_PER_UNIT != 0)