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author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-01-14 14:23:26 +0000 |
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committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2012-01-14 14:23:26 +0000 |
commit | a82c9c0e4a0b8e37c9c3ea5ae99714982563606f (patch) | |
tree | 93b9999698a4cd47ec4cb5fcdcdfd215d62f8e9e /backend/RTL.v | |
parent | bb8f49c419eb8205ef541edcbe17f4d14aa99564 (diff) | |
download | compcert-a82c9c0e4a0b8e37c9c3ea5ae99714982563606f.tar.gz compcert-a82c9c0e4a0b8e37c9c3ea5ae99714982563606f.zip |
Merge of the nonstrict-ops branch:
- Most RTL operators now evaluate to Some Vundef instead of None
when undefined behavior occurs.
- More aggressive instruction selection.
- "Bertotization" of pattern-matchings now implemented by a proper preprocessor.
- Cast optimization moved to cfrontend/Cminorgen; removed backend/CastOptim.
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1790 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'backend/RTL.v')
-rw-r--r-- | backend/RTL.v | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/backend/RTL.v b/backend/RTL.v index 10d4a3f0..6a209412 100644 --- a/backend/RTL.v +++ b/backend/RTL.v @@ -255,18 +255,13 @@ Inductive step: state -> trace -> state -> Prop := external_call ef ge rs##args m t v m' -> step (State s f sp pc rs m) t (State s f sp pc' (rs#res <- v) m') - | exec_Icond_true: - forall s f sp pc rs m cond args ifso ifnot, + | exec_Icond: + forall s f sp pc rs m cond args ifso ifnot b pc', (fn_code f)!pc = Some(Icond cond args ifso ifnot) -> - eval_condition cond rs##args m = Some true -> + eval_condition cond rs##args m = Some b -> + pc' = (if b then ifso else ifnot) -> step (State s f sp pc rs m) - E0 (State s f sp ifso rs m) - | exec_Icond_false: - forall s f sp pc rs m cond args ifso ifnot, - (fn_code f)!pc = Some(Icond cond args ifso ifnot) -> - eval_condition cond rs##args m = Some false -> - step (State s f sp pc rs m) - E0 (State s f sp ifnot rs m) + E0 (State s f sp pc' rs m) | exec_Ijumptable: forall s f sp pc rs m arg tbl n pc', (fn_code f)!pc = Some(Ijumptable arg tbl) -> |