diff options
| author |  xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2009-11-10 12:50:57 +0000 |
|---|---|---|
| committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2009-11-10 12:50:57 +0000 |
| commit | 74487f079dd56663f97f9731cea328931857495c (patch) | |
| tree | 9de10b895da39adffaf66bff983d6ed573898068 /backend/LTLin.v | |
| parent | 0486654fac91947fec93d18a0738dd7aa10bcf96 (diff) | |
Added support for jump tables in back end.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1171 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'backend/LTLin.v')
| -rw-r--r-- | backend/LTLin.v | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/backend/LTLin.v b/backend/LTLin.v index 10b7d83..e353338 100644 --- a/backend/LTLin.v +++ b/backend/LTLin.v @@ -50,6 +50,7 @@ Inductive instruction: Type := | Llabel: label -> instruction | Lgoto: label -> instruction | Lcond: condition -> list loc -> label -> instruction + | Ljumptable: loc -> list label -> instruction | Lreturn: option loc -> instruction. Definition code: Type := list instruction. @@ -204,6 +205,13 @@ Inductive step: state -> trace -> state -> Prop := eval_condition cond (map rs args) = Some false -> step (State s f sp (Lcond cond args lbl :: b) rs m) E0 (State s f sp b rs m) + | exec_Ljumptable: + forall s f sp arg tbl b rs m n lbl b', + rs arg = Vint n -> + list_nth_z tbl (Int.signed n) = Some lbl -> + find_label lbl f.(fn_code) = Some b' -> + step (State s f sp (Ljumptable arg tbl :: b) rs m) + E0 (State s f sp b' rs m) | exec_Lreturn: forall s f stk rs m or b, step (State s f (Vptr stk Int.zero) (Lreturn or :: b) rs m) |