diff options
Diffstat (limited to 'backend/LTL.v')
| -rw-r--r-- | backend/LTL.v | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/backend/LTL.v b/backend/LTL.v index 5e7eec8c..3edd60a2 100644 --- a/backend/LTL.v +++ b/backend/LTL.v @@ -29,7 +29,7 @@ Definition node := positive. Inductive instruction: Type := | Lop (op: operation) (args: list mreg) (res: mreg) - | Lload (chunk: memory_chunk) (addr: addressing) (args: list mreg) (dst: mreg) + | Lload (trap : trapping_mode) (chunk: memory_chunk) (addr: addressing) (args: list mreg) (dst: mreg) | Lgetstack (sl: slot) (ofs: Z) (ty: typ) (dst: mreg) | Lsetstack (src: mreg) (sl: slot) (ofs: Z) (ty: typ) | Lstore (chunk: memory_chunk) (addr: addressing) (args: list mreg) (src: mreg) @@ -37,7 +37,7 @@ Inductive instruction: Type := | Ltailcall (sg: signature) (ros: mreg + ident) | Lbuiltin (ef: external_function) (args: list (builtin_arg loc)) (res: builtin_res mreg) | Lbranch (s: node) - | Lcond (cond: condition) (args: list mreg) (s1 s2: node) + | Lcond (cond: condition) (args: list mreg) (s1 s2: node) (info: option bool) | Ljumptable (arg: mreg) (tbl: list node) | Lreturn. @@ -209,11 +209,24 @@ Inductive step: state -> trace -> state -> Prop := rs' = Locmap.set (R res) v (undef_regs (destroyed_by_op op) rs) -> step (Block s f sp (Lop op args res :: bb) rs m) E0 (Block s f sp bb rs' m) - | exec_Lload: forall s f sp chunk addr args dst bb rs m a v rs', + | exec_Lload: forall s f sp trap chunk addr args dst bb rs m a v rs', eval_addressing ge sp addr (reglist rs args) = Some a -> Mem.loadv chunk m a = Some v -> rs' = Locmap.set (R dst) v (undef_regs (destroyed_by_load chunk addr) rs) -> - step (Block s f sp (Lload chunk addr args dst :: bb) rs m) + step (Block s f sp (Lload trap chunk addr args dst :: bb) rs m) + E0 (Block s f sp bb rs' m) + | exec_Lload_notrap1: forall s f sp chunk addr args dst bb rs m rs', + eval_addressing ge sp addr (reglist rs args) = None -> + rs' = Locmap.set (R dst) (default_notrap_load_value chunk) + (undef_regs (destroyed_by_load chunk addr) rs) -> + step (Block s f sp (Lload NOTRAP chunk addr args dst :: bb) rs m) + E0 (Block s f sp bb rs' m) + | exec_Lload_notrap2: forall s f sp chunk addr args dst bb rs m a rs', + eval_addressing ge sp addr (reglist rs args) = Some a -> + Mem.loadv chunk m a = None -> + rs' = Locmap.set (R dst) (default_notrap_load_value chunk) + (undef_regs (destroyed_by_load chunk addr) rs) -> + step (Block s f sp (Lload NOTRAP chunk addr args dst :: bb) rs m) E0 (Block s f sp bb rs' m) | exec_Lgetstack: forall s f sp sl ofs ty dst bb rs m rs', rs' = Locmap.set (R dst) (rs (S sl ofs ty)) (undef_regs (destroyed_by_getstack sl) rs) -> @@ -250,11 +263,11 @@ Inductive step: state -> trace -> state -> Prop := | exec_Lbranch: forall s f sp pc bb rs m, step (Block s f sp (Lbranch pc :: bb) rs m) E0 (State s f sp pc rs m) - | exec_Lcond: forall s f sp cond args pc1 pc2 bb rs b pc rs' m, + | exec_Lcond: forall s f sp cond args pc1 pc2 bb rs b pc rs' m i, eval_condition cond (reglist rs args) m = Some b -> pc = (if b then pc1 else pc2) -> rs' = undef_regs (destroyed_by_cond cond) rs -> - step (Block s f sp (Lcond cond args pc1 pc2 :: bb) rs m) + step (Block s f sp (Lcond cond args pc1 pc2 i :: bb) rs m) E0 (State s f sp pc rs' m) | exec_Ljumptable: forall s f sp arg tbl bb rs m n pc rs', rs (R arg) = Vint n -> @@ -315,7 +328,7 @@ Fixpoint successors_block (b: bblock) : list node := | nil => nil (**r should never happen *) | Ltailcall _ _ :: _ => nil | Lbranch s :: _ => s :: nil - | Lcond _ _ s1 s2 :: _ => s1 :: s2 :: nil + | Lcond _ _ s1 s2 _ :: _ => s1 :: s2 :: nil | Ljumptable _ tbl :: _ => tbl | Lreturn :: _ => nil | instr :: b' => successors_block b' |