Commit 365fca38 authored by Robbert's avatar Robbert

Merge branch 'ci/robbert/simpl_local' into 'master'

Use `simpl` in `wp_` tactics just in the expression

Closes #113

See merge request FP/iris-coq!94
parents e9f14405 11e0f153
......@@ -5,6 +5,18 @@ From iris.heap_lang Require Export tactics lifting.
Set Default Proof Using "Type".
Import uPred.
Lemma tac_wp_expr_eval `{heapG Σ} Δ E Φ e e' :
e = e'
envs_entails Δ (WP e' @ E {{ Φ }}) envs_entails Δ (WP e @ E {{ Φ }}).
Proof. by intros ->. Qed.
Ltac wp_expr_eval t :=
try iStartProof;
try (eapply tac_wp_expr_eval; [t; reflexivity|]).
Ltac wp_expr_simpl := wp_expr_eval simpl.
Ltac wp_expr_simpl_subst := wp_expr_eval simpl_subst.
Lemma tac_wp_pure `{heapG Σ} Δ Δ' E e1 e2 φ Φ :
PureExec φ e1 e2
φ
......@@ -34,7 +46,7 @@ Tactic Notation "wp_pure" open_constr(efoc) :=
[apply _ (* PureExec *)
|try fast_done (* The pure condition for PureExec *)
|apply _ (* IntoLaters *)
|simpl_subst; try wp_value_head (* new goal *)
|wp_expr_simpl_subst; try wp_value_head (* new goal *)
])
|| fail "wp_pure: cannot find" efoc "in" e "or" efoc "is not a reduct"
| _ => fail "wp_pure: not a 'wp'"
......@@ -54,15 +66,16 @@ Tactic Notation "wp_proj" := wp_pure (Fst _) || wp_pure (Snd _).
Tactic Notation "wp_case" := wp_pure (Case _ _ _).
Tactic Notation "wp_match" := wp_case; wp_let.
Lemma tac_wp_bind `{heapG Σ} K Δ E Φ e :
envs_entails Δ (WP e @ E {{ v, WP fill K (of_val v) @ E {{ Φ }} }})%I
Lemma tac_wp_bind `{heapG Σ} K Δ E Φ e f :
f = (λ e, fill K e) (* as an eta expanded hypothesis so that we can `simpl` it *)
envs_entails Δ (WP e @ E {{ v, WP f (of_val v) @ E {{ Φ }} }})%I
envs_entails Δ (WP fill K e @ E {{ Φ }}).
Proof. rewrite /envs_entails=> ->. by apply: wp_bind. Qed.
Proof. rewrite /envs_entails=> -> ->. by apply: wp_bind. Qed.
Ltac wp_bind_core K :=
lazymatch eval hnf in K with
| [] => idtac
| _ => apply (tac_wp_bind K); simpl
| _ => eapply (tac_wp_bind K); [simpl; reflexivity|lazy beta]
end.
Tactic Notation "wp_bind" open_constr(efoc) :=
......@@ -155,7 +168,7 @@ Tactic Notation "wp_apply" open_constr(lem) :=
lazymatch goal with
| |- envs_entails _ (wp ?E ?e ?Q) =>
reshape_expr e ltac:(fun K e' =>
wp_bind_core K; iApplyHyp H; try iNext; simpl) ||
wp_bind_core K; iApplyHyp H; try iNext; wp_expr_simpl) ||
lazymatch iTypeOf H with
| Some (_,?P) => fail "wp_apply: cannot apply" P
end
......@@ -174,7 +187,7 @@ Tactic Notation "wp_alloc" ident(l) "as" constr(H) :=
|first [intros l | fail 1 "wp_alloc:" l "not fresh"];
eexists; split;
[env_cbv; reflexivity || fail "wp_alloc:" H "not fresh"
|simpl; try wp_value_head]]
|wp_expr_simpl; try wp_value_head]]
| _ => fail "wp_alloc: not a 'wp'"
end.
......@@ -191,7 +204,7 @@ Tactic Notation "wp_load" :=
[apply _
|let l := match goal with |- _ = Some (_, (?l {_} _)%I) => l end in
iAssumptionCore || fail "wp_load: cannot find" l "↦ ?"
|simpl; try wp_value_head]
|wp_expr_simpl; try wp_value_head]
| _ => fail "wp_load: not a 'wp'"
end.
......@@ -207,7 +220,7 @@ Tactic Notation "wp_store" :=
|let l := match goal with |- _ = Some (_, (?l {_} _)%I) => l end in
iAssumptionCore || fail "wp_store: cannot find" l "↦ ?"
|env_cbv; reflexivity
|simpl; try first [wp_pure (Seq (Lit LitUnit) _)|wp_value_head]]
|wp_expr_simpl; try first [wp_pure (Seq (Lit LitUnit) _)|wp_value_head]]
| _ => fail "wp_store: not a 'wp'"
end.
......@@ -223,7 +236,7 @@ Tactic Notation "wp_cas_fail" :=
|let l := match goal with |- _ = Some (_, (?l {_} _)%I) => l end in
iAssumptionCore || fail "wp_cas_fail: cannot find" l "↦ ?"
|try congruence
|simpl; try wp_value_head]
|wp_expr_simpl; try wp_value_head]
| _ => fail "wp_cas_fail: not a 'wp'"
end.
......@@ -240,6 +253,6 @@ Tactic Notation "wp_cas_suc" :=
iAssumptionCore || fail "wp_cas_suc: cannot find" l "↦ ?"
|try congruence
|env_cbv; reflexivity
|simpl; try wp_value_head]
|wp_expr_simpl; try wp_value_head]
| _ => fail "wp_cas_suc: not a 'wp'"
end.
......@@ -10,6 +10,16 @@ Section LiftingTests.
Implicit Types P Q : iProp Σ.
Implicit Types Φ : val iProp Σ.
Definition simpl_test :
(10 = 4 + 6)%nat -
WP let: "x" := ref #1 in "x" <- !"x";; !"x" {{ v, v = #1 }}.
Proof.
iIntros "?". wp_alloc l. repeat (wp_pure _) || wp_load || wp_store.
match goal with
| |- context [ (10 = 4 + 6)%nat ] => done
end.
Qed.
Definition heap_e : expr :=
let: "x" := ref #1 in "x" <- !"x" + #1 ;; !"x".
......
......@@ -40,7 +40,7 @@ Lemma sum_loop_wp `{!heapG Σ} v t l (n : Z) :
{{{ RET #(); l #(sum t + n) is_tree v t }}}.
Proof.
iIntros (Φ) "[Hl Ht] HΦ".
iInduction t as [n'|tl ? tr] "IH" forall (v l n Φ); wp_rec; wp_let.
iInduction t as [n'|tl ? tr] "IH" forall (v l n Φ); simpl; wp_rec; wp_let.
- iDestruct "Ht" as "%"; subst.
wp_match. wp_load. wp_op. wp_store.
by iApply ("HΦ" with "[$Hl]").
......
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