diff options
| author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-08-21 11:05:36 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-08-21 11:05:36 +0200 |
| commit | 54f97d1988f623ba7422e13a504caeb5701ba93c (patch) | |
| tree | d8dea46837352979490f4ed4516f9649fef41b98 /backend/RTLgenaux.ml | |
| parent | b4846ffadfa3fbb73ffa7d9c43e5218adeece8da (diff) | |
| download | compcert-kvx-54f97d1988f623ba7422e13a504caeb5701ba93c.tar.gz compcert-kvx-54f97d1988f623ba7422e13a504caeb5701ba93c.zip | |
Refactoring of builtins and annotations in the back-end.
Before, the back-end languages had distinct instructions
- Iannot for annotations, taking structured expressions (annot_arg)
as arguments, and producing no results'
- Ibuiltin for other builtins, using simple pseudoregs/locations/registers
as arguments and results.
This branch enriches Ibuiltin instructions so that they take structured
expressions (builtin_arg and builtin_res) as arguments and results.
This way,
- Annotations fit the general pattern of builtin functions,
so Iannot instructions are removed.
- EF_vload_global and EF_vstore_global become useless, as the
same optimization can be achieved by EF_vload/vstore taking
a structured argument of the "address of global" kind.
- Better code can be generated for builtin_memcpy between stack locations,
or volatile accesses to stack locations.
Finally, this commit also introduces a new kind of external function,
EF_debug, which is like EF_annot but produces no observable events.
It will be used later to transport debug info through the back-end,
without preventing optimizations.
Diffstat (limited to 'backend/RTLgenaux.ml')
| -rw-r--r-- | backend/RTLgenaux.ml | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/backend/RTLgenaux.ml b/backend/RTLgenaux.ml index 40bb5c41..e3373bf9 100644 --- a/backend/RTLgenaux.ml +++ b/backend/RTLgenaux.ml @@ -12,6 +12,7 @@ open Datatypes open Camlcoq +open AST open Switch open CminorSel @@ -48,6 +49,10 @@ and size_condexpr = function | CElet(a, c) -> size_expr a + size_condexpr c +let size_exprlist al = List.fold_right (fun a s -> size_expr a + s) al 0 + +let size_builtin_args al = size_exprlist (params_of_builtin_args al) + let rec size_exitexpr = function | XEexit n -> 0 | XEjumptable(arg, tbl) -> 2 + size_expr arg @@ -72,8 +77,8 @@ let rec size_stmt = function 3 + size_eos eos + size_exprs args + length_exprs args | Stailcall(sg, eos, args) -> 3 + size_eos eos + size_exprs args + length_exprs args - | Sbuiltin(optid, ef, args) -> 1 + size_exprs args - | Sannot(txt, args) -> 0 + | Sbuiltin(_, (EF_annot _ | EF_debug _), _) -> 0 + | Sbuiltin(optid, ef, args) -> 1 + size_builtin_args args | Sseq(s1, s2) -> size_stmt s1 + size_stmt s2 | Sifthenelse(ce, s1, s2) -> size_condexpr ce + max (size_stmt s1) (size_stmt s2) |