Support for 64-bit architectures: generic support

- Introduce Archi.ptr64 parameter.
- Define module Ptrofs of integers as wide as a pointer (64 if Archi.ptr64, 32 otherwise).
- Use Ptrofs.int as the offset type for Vptr values and anywhere pointer offsets are manipulated.
- Modify Val operations that handle pointers (e.g. Val.add, Val.sub, Val.cmpu) so that in 64-bit pointer mode it is the "long" operation (e.g. Val.addl, Val.subl, Val.cmplu) that handles pointers.
- Update the memory model accordingly.
- Modify C operations that handle pointers (e.g. addition, subtraction, comparisons) accordingly.
- Make it possible to turn off the splitting of 64-bit integers into pairs of 32-bit integers.
- Update the compiler front-end and back-end accordingly.

1 files changed, 1 insertions, 1 deletions

diff --git a/cfrontend/SimplLocals.v b/cfrontend/SimplLocals.v
index 580f02c2..c0086a38 100644
--- a/cfrontend/SimplLocals.v
+++ b/cfrontend/SimplLocals.v
@@ -40,7 +40,7 @@ Definition is_liftable_var (cenv: compilenv) (a: expr) : option ident :=
 
 Definition make_cast (a: expr) (tto: type) : expr :=
   match classify_cast (typeof a) tto with
-  | cast_case_neutral => a
+  | cast_case_pointer => a
   | cast_case_i2i I32 _ => a
   | cast_case_f2f => a
   | cast_case_s2s => a