diff --git a/Main.hs b/Main.hs
index 9bc9845..a8cdb5a 100644
--- a/Main.hs
+++ b/Main.hs
@@ -45,23 +45,9 @@ import Metadata
 import ParseOccam
 import ParseRain
 import Pass
+import PassList
 import PreprocessOccam
 import PrettyShow
-import RainPasses
-import SimplifyComms
-import SimplifyExprs
-import SimplifyProcs
-import SimplifyTypes
-import Unnest
-
-commonPasses :: [(String, Pass)]
-commonPasses =
-  [ ("Simplify types", simplifyTypes)
-  , ("Simplify expressions", simplifyExprs)
-  , ("Simplify processes", simplifyProcs)
-  , ("Flatten nested declarations", unnest)
-  , ("Simplify communications", simplifyComms)
-  ]
 
 type OptFunc = CompState -> IO CompState
 
@@ -281,15 +267,7 @@ compile mode fn outHandle
             ModeCompile ->
               do progress "Passes:"
 
-                 let passes
-                       = concat [ if csFrontend optsPS == FrontendRain
-                                    then rainPasses
-                                    else []
-                                , commonPasses
-                                , case csBackend optsPS of
-                                    BackendC -> genCPasses
-                                    BackendCPPCSP -> genCPPCSPPasses
-                                ]
+                 let passes = getPassList optsPS
                  ast2 <- runPasses passes ast1
 
                  debug "{{{ Generate code"
diff --git a/Makefile.am b/Makefile.am
index 92cff7a..b80e33b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -60,7 +60,7 @@ tock_SOURCES_hs += common/Pass.hs common/TreeUtils.hs common/Intrinsics.hs commo
 tock_SOURCES_hs += common/Pattern.hs common/Errors.hs common/ShowCode.hs common/PrettyShow.hs
 tock_SOURCES_hs += common/EvalConstants.hs common/Utils.hs common/CompState.hs common/Types.hs
 tock_SOURCES_hs += common/Metadata.hs common/AST.hs common/FlowGraph.hs common/FlowAlgorithms.hs
-tock_SOURCES_hs += common/TagAST.hs
+tock_SOURCES_hs += common/TagAST.hs common/PassList.hs
 tock_SOURCES_hs += backends/TLP.hs backends/BackendPasses.hs backends/AnalyseAsm.hs
 tock_SOURCES_hs += backends/GenerateC.hs backends/GenerateCPPCSP.hs
 tock_SOURCES_hs += Main.hs
diff --git a/common/PassList.hs b/common/PassList.hs
new file mode 100644
index 0000000..a4b2e6f
--- /dev/null
+++ b/common/PassList.hs
@@ -0,0 +1,55 @@
+{-
+Tock: a compiler for parallel languages
+Copyright (C) 2007  University of Kent
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation, either version 2 of the License, or (at your
+option) any later version.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program.  If not, see <http://www.gnu.org/licenses/>.
+-}
+
+-- | Lists of passes
+module PassList (getPassList) where
+
+import ArrayUsageCheck
+import CompState
+import GenerateC
+import GenerateCPPCSP
+import Pass
+import RainPasses
+import SimplifyComms
+import SimplifyExprs
+import SimplifyProcs
+import SimplifyTypes
+import Unnest
+
+commonPasses :: CompState -> [(String, Pass)]
+commonPasses opts =
+  [ ("Simplify types", simplifyTypes)
+  , ("Simplify expressions", simplifyExprs)
+  ]
+  ++ (if csUsageChecking opts then [("Check array usage", checkArrayUsage)] else []) ++
+  [    
+    ("Simplify processes", simplifyProcs)
+  , ("Flatten nested declarations", unnest)
+  , ("Simplify communications", simplifyComms)
+  ]
+
+
+getPassList :: CompState -> [(String, Pass)]
+getPassList optsPS     = concat [ if csFrontend optsPS == FrontendRain
+                                    then rainPasses
+                                    else []
+                                , commonPasses optsPS
+                                , case csBackend optsPS of
+                                    BackendC -> genCPasses
+                                    BackendCPPCSP -> genCPPCSPPasses
+                                ]