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| 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/Unusedglob.v | |
| 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/Unusedglob.v')
| -rw-r--r-- | backend/Unusedglob.v | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/backend/Unusedglob.v b/backend/Unusedglob.v index 400c19d9..8725c9af 100644 --- a/backend/Unusedglob.v +++ b/backend/Unusedglob.v @@ -59,8 +59,7 @@ Definition ref_instruction (i: instruction) : list ident := | Icall _ (inr id) _ _ _ => id :: nil | Itailcall _ (inl r) _ => nil | Itailcall _ (inr id) _ => id :: nil - | Ibuiltin ef _ _ _ => globals_external ef - | Iannot _ args _ => globals_of_annot_args args + | Ibuiltin _ args _ _ => globals_of_builtin_args args | Icond cond _ _ _ => nil | Ijumptable _ _ => nil | Ireturn _ => nil @@ -87,7 +86,7 @@ Definition add_ref_definition (pm: prog_map) (id: ident) (w: workset): workset : match pm!id with | None => w | Some (Gfun (Internal f)) => add_ref_function f w - | Some (Gfun (External ef)) => addlist_workset (globals_external ef) w + | Some (Gfun (External ef)) => w | Some (Gvar gv) => add_ref_globvar gv w end. |