Define bit width of NUM type in one place.

* lib.h (NUM_BIT): New preprocessor symbol.

* arith.c (CNUM_BIT): Preprocessor symbol removed; this
same quantity is already known as PTR_BIT in lib.h.
(mul, square): Replace CNUM_BIT with PTR_BIT.
(comp_trunc, logtrunc, sign_extend, ash): Replace
num_bits with NUM_BIT.

* struct.c (struct_inst): Replace calculation with NUM_BIT.

1 files changed, 1 insertions, 1 deletions

diff --git a/struct.c b/struct.c
index 8adf6323..e601cbcd 100644
--- a/struct.c
+++ b/struct.c
@@ -97,7 +97,7 @@ struct struct_type {
 
 struct struct_inst {
   struct struct_type *type;
-  cnum id : sizeof (cnum) * CHAR_BIT - TAG_SHIFT;
+  cnum id : NUM_BIT;
   unsigned lazy : 1;
   unsigned dirty : 1;
   val slot[FLEX_ARRAY];