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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 /ia32/TargetPrinter.ml | |
| parent | b4846ffadfa3fbb73ffa7d9c43e5218adeece8da (diff) | |
| download | compcert-54f97d1988f623ba7422e13a504caeb5701ba93c.tar.gz compcert-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 'ia32/TargetPrinter.ml')
| -rw-r--r-- | ia32/TargetPrinter.ml | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/ia32/TargetPrinter.ml b/ia32/TargetPrinter.ml index 18aacebf..581c84e2 100644 --- a/ia32/TargetPrinter.ml +++ b/ia32/TargetPrinter.ml @@ -658,20 +658,17 @@ module Target(System: SYSTEM):TARGET = assert false | Pbuiltin(ef, args, res) -> begin match ef with + | EF_annot(txt, targs) -> + print_annot_stmt oc (extern_atom txt) targs args | EF_inline_asm(txt, sg, clob) -> fprintf oc "%s begin inline assembly\n\t" comment; - print_inline_asm preg oc (extern_atom txt) sg args res; + print_inline_asm preg oc (extern_atom txt) sg + (params_of_builtin_args args) + (params_of_builtin_res res); fprintf oc "%s end inline assembly\n" comment | _ -> assert false end - | Pannot(ef, args) -> - begin match ef with - | EF_annot(txt, targs) -> - print_annot_stmt oc (extern_atom txt) targs args - | _ -> - assert false - end let print_literal64 oc (lbl, n) = fprintf oc "%a: .quad 0x%Lx\n" label lbl n |