1 | include "Clight/Csyntax.ma". |
---|
2 | |
---|
3 | definition add_cost_before : statement → universe CostTag → statement × (universe CostTag) ≝ |
---|
4 | λs,gen. |
---|
5 | let 〈l,gen〉 ≝ fresh … gen in |
---|
6 | 〈Scost l s, gen〉. |
---|
7 | |
---|
8 | definition add_cost_after : statement → universe CostTag → statement × (universe CostTag) ≝ |
---|
9 | λs,gen. |
---|
10 | let 〈l,gen〉 ≝ fresh … gen in |
---|
11 | 〈Ssequence s (Scost l Sskip), gen〉. |
---|
12 | |
---|
13 | definition add_cost_expr : expr → universe CostTag → expr × (universe CostTag) ≝ |
---|
14 | λe,gen. |
---|
15 | let 〈l,gen〉 ≝ fresh … gen in |
---|
16 | 〈Expr (Ecost l e) (typeof e), gen〉. |
---|
17 | |
---|
18 | let rec label_expr (e:expr) (costgen:universe CostTag) |
---|
19 | on e : expr × (universe CostTag) ≝ |
---|
20 | match e with |
---|
21 | [ Expr ed ty ⇒ let 〈ed,costgen〉 ≝ label_expr_descr ed costgen in |
---|
22 | 〈Expr ed ty, costgen〉 |
---|
23 | ] |
---|
24 | and label_expr_descr (e:expr_descr) (costgen:universe CostTag) |
---|
25 | on e : expr_descr × (universe CostTag) ≝ |
---|
26 | match e with |
---|
27 | [ Ederef e' ⇒ |
---|
28 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
29 | 〈Ederef e', costgen〉 |
---|
30 | | Eaddrof e' ⇒ |
---|
31 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
32 | 〈Eaddrof e', costgen〉 |
---|
33 | | Eunop op e' ⇒ |
---|
34 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
35 | 〈Eunop op e', costgen〉 |
---|
36 | | Ebinop op e1 e2 ⇒ |
---|
37 | let 〈e1,costgen〉 ≝ label_expr e1 costgen in |
---|
38 | let 〈e2,costgen〉 ≝ label_expr e2 costgen in |
---|
39 | 〈Ebinop op e1 e2, costgen〉 |
---|
40 | | Ecast ty e' ⇒ |
---|
41 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
42 | 〈Ecast ty e', costgen〉 |
---|
43 | | Econdition e' e1 e2 ⇒ |
---|
44 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
45 | let 〈e1,costgen〉 ≝ label_expr e1 costgen in |
---|
46 | let 〈e1,costgen〉 ≝ add_cost_expr e1 costgen in |
---|
47 | let 〈e2,costgen〉 ≝ label_expr e2 costgen in |
---|
48 | let 〈e2,costgen〉 ≝ add_cost_expr e2 costgen in |
---|
49 | 〈Econdition e' e1 e2, costgen〉 |
---|
50 | (* andbool and orbool are changed to conditionals to capture their |
---|
51 | short-circuiting cost difference *) |
---|
52 | | Eandbool e1 e2 ⇒ |
---|
53 | let 〈e1,costgen〉 ≝ label_expr e1 costgen in |
---|
54 | let 〈e2,costgen〉 ≝ label_expr e2 costgen in |
---|
55 | let 〈e2,costgen〉 ≝ add_cost_expr e2 costgen in |
---|
56 | let 〈ef,costgen〉 ≝ add_cost_expr (Expr (Econst_int I32 (zero ?)) (Tint I32 Signed)) costgen in |
---|
57 | 〈Econdition e1 e2 ef, costgen〉 |
---|
58 | | Eorbool e1 e2 ⇒ |
---|
59 | let 〈e1,costgen〉 ≝ label_expr e1 costgen in |
---|
60 | let 〈et,costgen〉 ≝ add_cost_expr (Expr (Econst_int I32 (repr ? 1)) (Tint I32 Signed)) costgen in |
---|
61 | let 〈e2,costgen〉 ≝ label_expr e2 costgen in |
---|
62 | let 〈e2,costgen〉 ≝ add_cost_expr e2 costgen in |
---|
63 | 〈Econdition e1 et e2, costgen〉 |
---|
64 | |
---|
65 | | Efield e' id ⇒ |
---|
66 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
67 | 〈Efield e' id, costgen〉 |
---|
68 | (* The prototype asserts on preexisting cost labels, but I'd quite like to |
---|
69 | keep them. *) |
---|
70 | | Ecost l e' ⇒ |
---|
71 | let 〈e',costgen〉 ≝ label_expr e' costgen in |
---|
72 | 〈Ecost l e', costgen〉 |
---|
73 | |
---|
74 | (* The remaining expressions don't have subexpressions. *) |
---|
75 | | _ ⇒ 〈e,costgen〉 |
---|
76 | ]. |
---|
77 | |
---|
78 | let rec label_exprs (l:list expr) (costgen:universe CostTag) |
---|
79 | on l : list expr × (universe CostTag) ≝ |
---|
80 | match l with |
---|
81 | [ nil ⇒ 〈nil ?,costgen〉 |
---|
82 | | cons e es ⇒ |
---|
83 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
84 | let 〈es,costgen〉 ≝ label_exprs es costgen in |
---|
85 | 〈e::es,costgen〉 |
---|
86 | ]. |
---|
87 | |
---|
88 | definition label_opt_expr ≝ |
---|
89 | λoe,costgen. match oe with |
---|
90 | [ None ⇒ 〈None ?, costgen〉 |
---|
91 | | Some e ⇒ let 〈e,costgen〉 ≝ label_expr e costgen in 〈Some ? e,costgen〉 |
---|
92 | ]. |
---|
93 | |
---|
94 | |
---|
95 | let rec label_statement (s:statement) (costgen:universe CostTag) |
---|
96 | on s : statement × (universe CostTag) ≝ |
---|
97 | match s with |
---|
98 | [ Sskip ⇒ 〈Sskip,costgen〉 |
---|
99 | | Sassign e1 e2 ⇒ |
---|
100 | let 〈e1,costgen〉 ≝ label_expr e1 costgen in |
---|
101 | let 〈e2,costgen〉 ≝ label_expr e2 costgen in |
---|
102 | 〈Sassign e1 e2, costgen〉 |
---|
103 | | Scall e_ret e_fn e_args ⇒ |
---|
104 | let 〈e_ret,costgen〉 ≝ label_opt_expr e_ret costgen in |
---|
105 | let 〈e_fn,costgen〉 ≝ label_expr e_fn costgen in |
---|
106 | let 〈e_args,costgen〉 ≝ label_exprs e_args costgen in |
---|
107 | 〈Scall e_ret e_fn e_args, costgen〉 |
---|
108 | | Ssequence s1 s2 ⇒ |
---|
109 | let 〈s1,costgen〉 ≝ label_statement s1 costgen in |
---|
110 | let 〈s2,costgen〉 ≝ label_statement s2 costgen in |
---|
111 | 〈Ssequence s1 s2, costgen〉 |
---|
112 | | Sifthenelse e s1 s2 ⇒ |
---|
113 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
114 | let 〈s1,costgen〉 ≝ label_statement s1 costgen in |
---|
115 | let 〈s1,costgen〉 ≝ add_cost_before s1 costgen in |
---|
116 | let 〈s2,costgen〉 ≝ label_statement s2 costgen in |
---|
117 | let 〈s2,costgen〉 ≝ add_cost_before s2 costgen in |
---|
118 | 〈Sifthenelse e s1 s2, costgen〉 |
---|
119 | | Swhile e s' ⇒ |
---|
120 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
121 | let 〈s',costgen〉 ≝ label_statement s' costgen in |
---|
122 | let 〈s',costgen〉 ≝ add_cost_before s' costgen in |
---|
123 | let 〈s,costgen〉 ≝ add_cost_after (Swhile e s') costgen in |
---|
124 | 〈s,costgen〉 |
---|
125 | | Sdowhile e s' ⇒ |
---|
126 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
127 | let 〈s',costgen〉 ≝ label_statement s' costgen in |
---|
128 | let 〈s',costgen〉 ≝ add_cost_before s' costgen in |
---|
129 | let 〈s,costgen〉 ≝ add_cost_after (Sdowhile e s') costgen in |
---|
130 | 〈s,costgen〉 |
---|
131 | | Sfor s1 e s2 s3 ⇒ |
---|
132 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
133 | let 〈s1,costgen〉 ≝ label_statement s1 costgen in |
---|
134 | let 〈s2,costgen〉 ≝ label_statement s2 costgen in |
---|
135 | let 〈s3,costgen〉 ≝ label_statement s3 costgen in |
---|
136 | let 〈s3,costgen〉 ≝ add_cost_before s3 costgen in |
---|
137 | let 〈s,costgen〉 ≝ add_cost_after (Sfor s1 e s2 s3) costgen in |
---|
138 | 〈s,costgen〉 |
---|
139 | | Sbreak ⇒ 〈Sbreak,costgen〉 |
---|
140 | | Scontinue ⇒ 〈Scontinue,costgen〉 |
---|
141 | | Sreturn opt_e ⇒ |
---|
142 | let 〈opt_e,costgen〉 ≝ label_opt_expr opt_e costgen in |
---|
143 | 〈Sreturn opt_e,costgen〉 |
---|
144 | | Sswitch e ls ⇒ |
---|
145 | let 〈e,costgen〉 ≝ label_expr e costgen in |
---|
146 | let 〈ls,costgen〉 ≝ label_lstatements ls costgen in |
---|
147 | 〈Sswitch e ls, costgen〉 |
---|
148 | | Slabel l s' ⇒ |
---|
149 | let 〈s',costgen〉 ≝ label_statement s' costgen in |
---|
150 | let 〈s',costgen〉 ≝ add_cost_before s' costgen in |
---|
151 | 〈Slabel l s', costgen〉 |
---|
152 | | Sgoto l ⇒ 〈Sgoto l, costgen〉 |
---|
153 | |
---|
154 | (* The prototype asserts on preexisting cost labels, but I'd quite like to |
---|
155 | keep them. *) |
---|
156 | | Scost l s' ⇒ |
---|
157 | let 〈s',costgen〉 ≝ label_statement s' costgen in |
---|
158 | 〈Scost l s', costgen〉 |
---|
159 | ] |
---|
160 | and label_lstatements (ls:labeled_statements) (costgen:universe CostTag) |
---|
161 | on ls : labeled_statements × (universe CostTag) ≝ |
---|
162 | match ls with |
---|
163 | [ LSdefault s ⇒ |
---|
164 | let 〈s,costgen〉 ≝ label_statement s costgen in |
---|
165 | let 〈s,costgen〉 ≝ add_cost_before s costgen in |
---|
166 | 〈LSdefault s, costgen〉 |
---|
167 | | LScase sz i s ls' ⇒ |
---|
168 | let 〈s,costgen〉 ≝ label_statement s costgen in |
---|
169 | let 〈s,costgen〉 ≝ add_cost_before s costgen in |
---|
170 | let 〈ls',costgen〉 ≝ label_lstatements ls' costgen in |
---|
171 | 〈LScase sz i s ls', costgen〉 |
---|
172 | ]. |
---|
173 | |
---|
174 | definition label_function : function → res function ≝ |
---|
175 | λf. |
---|
176 | let costgen ≝ new_universe CostTag in |
---|
177 | let 〈body,costgen〉 ≝ label_statement (fn_body f) costgen in |
---|
178 | let 〈body,costgen〉 ≝ add_cost_before body costgen in |
---|
179 | do u ← check_universe_ok ? costgen; |
---|
180 | OK ? (mk_function (fn_return f) (fn_params f) (fn_vars f) body). |
---|
181 | |
---|
182 | definition label_fundef : clight_fundef → res clight_fundef ≝ |
---|
183 | λf. match f with |
---|
184 | [ CL_Internal f ⇒ do f ← label_function f; OK ? (CL_Internal f) |
---|
185 | | CL_External id args ty ⇒ OK ? (CL_External id args ty) |
---|
186 | ]. |
---|
187 | |
---|
188 | definition clight_label : clight_program → res clight_program ≝ |
---|
189 | transform_partial_program ??? label_fundef. |
---|