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author | Xavier Leroy <xavier.leroy@inria.fr> | 2015-03-27 08:55:05 +0100 |
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committer | Xavier Leroy <xavier.leroy@inria.fr> | 2015-03-27 08:55:05 +0100 |
commit | 4622f49fd089ae47d0c853343cb0a05f986c962a (patch) | |
tree | bd045e1ef59d57f8e4b5f5734470cae56a4e68b7 /backend/XTL.ml | |
parent | 8d75ab2d38fa20dc7d8e3839967015cc276cd642 (diff) | |
download | compcert-4622f49fd089ae47d0c853343cb0a05f986c962a.tar.gz compcert-4622f49fd089ae47d0c853343cb0a05f986c962a.zip |
Extend annotations so that they can keep track of global variables and local variables whose address is taken.
- CminorSel, RTL: add "annot" instructions.
- CminorSel to Asm: use type "annot_arg" for arguments of "annot" instructions.
- AST, Events: simplify EF_annot because constants are now part of the arguments.
Implementation is not complete yet.
Diffstat (limited to 'backend/XTL.ml')
-rw-r--r-- | backend/XTL.ml | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/backend/XTL.ml b/backend/XTL.ml index 9cb8e0a1..30c09fdf 100644 --- a/backend/XTL.ml +++ b/backend/XTL.ml @@ -35,6 +35,7 @@ type instruction = | Xcall of signature * (var, ident) sum * var list * var list | Xtailcall of signature * (var, ident) sum * var list | Xbuiltin of external_function * var list * var list + | Xannot of external_function * var annot_arg list | Xbranch of node | Xcond of condition * var list * node * node | Xjumptable of var * node list @@ -124,6 +125,12 @@ let rec set_vars_type vl tyl = let unify_var_type v1 v2 = if typeof v1 <> typeof v2 then raise Type_error +let type_annot_arg a ty = + match a with + | AA_base v -> set_var_type v ty + | AA_longofwords(v1, v2) -> set_var_type v1 Tint; set_var_type v2 Tint + | _ -> () + let type_instr = function | Xmove(src, dst) | Xspill(src, dst) | Xreload(src, dst) -> unify_var_type src dst @@ -153,6 +160,11 @@ let type_instr = function let sg = ef_sig ef in set_vars_type args sg.sig_args; set_vars_type res (Events.proj_sig_res' sg) + | Xannot(ef, args) -> + let sg = ef_sig ef in + if List.length args = List.length sg.sig_args + then List.iter2 type_annot_arg args sg.sig_args + else raise Type_error | Xbranch s -> () | Xcond(cond, args, s1, s2) -> |