X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;ds=sidebyside;f=compiler%2Futils%2FGraphOps.hs;h=17c14d0925559c91298a8cb96fc14e66ccd9b832;hb=b5a73581d0c03b9d44a77706b5973d74074aa6c1;hp=8183e0b29951e6bab34257bf1787762a11496d62;hpb=85255a966b21172ce5a26c8a9cb0cdaf7315be95;p=ghc-hetmet.git

diff --git a/compiler/utils/GraphOps.hs b/compiler/utils/GraphOps.hs
index 8183e0b..17c14d0 100644
--- a/compiler/utils/GraphOps.hs
+++ b/compiler/utils/GraphOps.hs
@@ -335,6 +335,9 @@ coalesceNodes aggressive triv graph (k1, k2)
 	, not $ elementOfUniqSet kMin (nodeConflicts nMax)
 	, not $ elementOfUniqSet kMax (nodeConflicts nMin)
 
+	-- can't coalesce the same node
+	, nodeId nMin /= nodeId nMax
+
 	= coalesceNodes_merge aggressive triv graph kMin kMax nMin nMax
 
 	-- don't do the coalescing after all
@@ -350,9 +353,6 @@ coalesceNodes_merge aggressive triv graph kMin kMax nMin nMax
 	| not (isNothing (nodeColor nMin) && isNothing (nodeColor nMax))
 	= error "GraphOps.coalesceNodes: can't coalesce colored nodes."
 
-	| nodeId nMin == nodeId nMax
-	= error "GraphOps.coalesceNodes: can't coalesce the same node."
-
 	---
 	| otherwise
 	= let