struct iseq_compile_data_storage: 16 bytes (from 32) overhead

This reduces the iseq_compile_data_storage header from 32 to 16
bytes on 64-bit systems.

pos and size fields cannot exceed 32-bit sizes due to stack size
limits.  Using a flexible array for the buffer also saves us 8
bytes of pointer overhead.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46958 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 3 deletions

diff --git a/compile.c b/compile.c
index 7dfaa81f47..f9bd9a531e 100644
--- a/compile.c
+++ b/compile.c
@@ -604,13 +604,11 @@ compile_data_alloc(rb_iseq_t *iseq, size_t size)
 	    goto retry;
 	}
 	storage->next = (void *)ALLOC_N(char, alloc_size +
-					sizeof(struct
-					       iseq_compile_data_storage));
+					SIZEOF_ISEQ_COMPILE_DATA_STORAGE);
 	storage = iseq->compile_data->storage_current = storage->next;
 	storage->next = 0;
 	storage->pos = 0;
 	storage->size = alloc_size;
-	storage->buff = (char *)(&storage->buff + 1);
     }
 
     ptr = (void *)&storage->buff[storage->pos];