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| author | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2019-04-14 10:47:14 +0200 |
|---|---|---|
| committer | Xavier Leroy <xavierleroy@users.noreply.github.com> | 2019-05-20 18:00:46 +0200 |
| commit | 43e7b6702a76306f20687bc9aba93ae465d6e4be (patch) | |
| tree | 48531b9f57986b01315d2b3f87f8ac43b72c4c42 /powerpc/NeedOp.v | |
| parent | 72ab6ad1dcf13dd61d3bdb896660b0f399e9f8a5 (diff) | |
| download | compcert-kvx-43e7b6702a76306f20687bc9aba93ae465d6e4be.tar.gz compcert-kvx-43e7b6702a76306f20687bc9aba93ae465d6e4be.zip | |
Implement a `Osel` operation for PowerPC
This operation compiles down to an `isel` instruction (conditional move).
The semantics is given by `Val.select`.
Diffstat (limited to 'powerpc/NeedOp.v')
| -rw-r--r-- | powerpc/NeedOp.v | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/powerpc/NeedOp.v b/powerpc/NeedOp.v index 9a579cc5..5ea09bd8 100644 --- a/powerpc/NeedOp.v +++ b/powerpc/NeedOp.v @@ -65,6 +65,7 @@ Definition needs_of_operation (op: operation) (nv: nval): list nval := | Ofloatofwords | Omakelong => op2 (default nv) | Olowlong | Ohighlong => op1 (default nv) | Ocmp c => needs_of_condition c + | Osel c ty => nv :: nv :: needs_of_condition c end. Definition operation_is_redundant (op: operation) (nv: nval): bool := @@ -147,6 +148,10 @@ Proof. erewrite needs_of_condition_sound by eauto. subst v; simpl. auto with na. subst v; auto with na. +- destruct (eval_condition c args m) as [b|] eqn:EC. + erewrite needs_of_condition_sound by eauto. + apply select_sound; auto. + simpl; auto with na. Qed. Lemma operation_is_redundant_sound: |