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NCG: Don't worry about trying to re-freeze missing coalescences
author
benl@ouroborus.net
<unknown>
Fri, 2 Jul 2010 05:33:19 +0000
(
05:33
+0000)
committer
benl@ouroborus.net
<unknown>
Fri, 2 Jul 2010 05:33:19 +0000
(
05:33
+0000)
compiler/utils/GraphOps.hs
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diff --git
a/compiler/utils/GraphOps.hs
b/compiler/utils/GraphOps.hs
index
87e77bf
..
388b968
100644
(file)
--- a/
compiler/utils/GraphOps.hs
+++ b/
compiler/utils/GraphOps.hs
@@
-420,8
+420,7
@@
freezeNode
freezeNode k
= graphMapModify
$ \fm ->
freezeNode k
= graphMapModify
$ \fm ->
- let
- -- freeze all the edges in the node to be frozen
+ let -- freeze all the edges in the node to be frozen
Just node = lookupUFM fm k
node' = node
{ nodeCoalesce = emptyUniqSet }
Just node = lookupUFM fm k
node' = node
{ nodeCoalesce = emptyUniqSet }
@@
-431,9
+430,9
@@
freezeNode k
-- update back edges pointing to this node
freezeEdge k node
= if elementOfUniqSet k (nodeCoalesce node)
-- update back edges pointing to this node
freezeEdge k node
= if elementOfUniqSet k (nodeCoalesce node)
- then node
- { nodeCoalesce = delOneFromUniqSet (nodeCoalesce node) k }
- else panic "GraphOps.freezeNode: edge to freeze wasn't in the coalesce set"
+ then node { nodeCoalesce = delOneFromUniqSet (nodeCoalesce node) k }
+ else node -- panic "GraphOps.freezeNode: edge to freeze wasn't in the coalesce set"
+ -- If the edge isn't actually in the coelesce set then just ignore it.
fm2 = foldUniqSet (adjustUFM (freezeEdge k)) fm1
$ nodeCoalesce node
fm2 = foldUniqSet (adjustUFM (freezeEdge k)) fm1
$ nodeCoalesce node