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author | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-10-27 09:23:19 +0000 |
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committer | xleroy <xleroy@fca1b0fc-160b-0410-b1d3-a4f43f01ea2e> | 2010-10-27 09:23:19 +0000 |
commit | b54721f58c2ecb65ce554d8b34f214d5121a2b0c (patch) | |
tree | 01bc71f3e5e6b1681dac76de97ab925e005cc2c4 /backend/CastOptim.v | |
parent | 63cc20f9ddb18bebae523c46438abdf2a4b140d4 (diff) | |
download | compcert-b54721f58c2ecb65ce554d8b34f214d5121a2b0c.tar.gz compcert-b54721f58c2ecb65ce554d8b34f214d5121a2b0c.zip |
Various algorithmic improvements that reduce compile times (thanks Alexandre Pilkiewicz):
- Lattice: preserve sharing in "combine" operation
- Kildall: use splay heaps (lib/Heaps.v) for node sets
- RTLgen: add a "nop" before loops so that natural enumeration of nodes
coincides with (reverse) postorder
- Maps: add PTree.map1 operation, use it in RTL and LTL.
- Driver: increase minor heap size
git-svn-id: https://yquem.inria.fr/compcert/svn/compcert/trunk@1543 fca1b0fc-160b-0410-b1d3-a4f43f01ea2e
Diffstat (limited to 'backend/CastOptim.v')
-rw-r--r-- | backend/CastOptim.v | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/backend/CastOptim.v b/backend/CastOptim.v index 545564d8..19d0065f 100644 --- a/backend/CastOptim.v +++ b/backend/CastOptim.v @@ -136,12 +136,12 @@ Module Approx <: SEMILATTICE_WITH_TOP. | Single, Single => Single | _, _ => Unknown end. - Lemma lub_commut: forall x y, eq (lub x y) (lub y x). + Lemma ge_lub_left: forall x y, ge (lub x y) x. Proof. - unfold lub, eq; intros. - destruct x; destruct y; auto. + unfold lub, ge; intros. + destruct x; destruct y; auto. Qed. - Lemma ge_lub_left: forall x y, ge (lub x y) x. + Lemma ge_lub_right: forall x y, ge (lub x y) y. Proof. unfold lub, ge; intros. destruct x; destruct y; auto. |