benchtests: Clean up the alloc_bufs

Drop realloc_bufs in favour of making alloc_bufs transparently
reallocate the buffers if it had allocated before.  Also consolidate
computation of buffer lengths so that they don't get repeated on every
reallocation.

	* benchtests/bench-string.h (buf1_size, buf2_size): New
	variables.
	(init_sizes): New function.
	(test_init): Use it.
	(alloc_buf, exit_error): New functions.
	(alloc_bufs): Use ALLOC_BUF.
	(realloc_bufs): Remove.
	* benchtests/bench-memcmp.c (do_test): Adjust.
	* benchtests/bench-memset-large.c (do_test): Likewise.
	* benchtests/bench-memset-walk.c (do_test): Likewise.
	* benchtests/bench-memset.c (do_test): Likewise.
	* benchtests/bench-strncmp.c (do_test): Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/benchtests/bench-memset.c b/benchtests/bench-memset.c
index 0ae201d4a5..a47620cbfc 100644
--- a/benchtests/bench-memset.c
+++ b/benchtests/bench-memset.c
@@ -134,7 +134,7 @@ do_test (json_ctx_t *json_ctx, size_t align, int c, size_t len)
   FOR_EACH_IMPL (impl, 0)
     {
       do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len);
-      realloc_bufs ();
+      alloc_bufs ();
     }
 
   json_array_end (json_ctx);