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-rw-r--r--compiler/nativeGen/RegAlloc/Linear/State.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/nativeGen/RegAlloc/Linear/State.hs b/compiler/nativeGen/RegAlloc/Linear/State.hs
index dc499c9c1f..39b5777ef3 100644
--- a/compiler/nativeGen/RegAlloc/Linear/State.hs
+++ b/compiler/nativeGen/RegAlloc/Linear/State.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE UnboxedTuples #-}
+
-- | State monad for the linear register allocator.
-- Here we keep all the state that the register allocator keeps track