Remove use of lambda with a refutable pattern

[ghc-hetmet.git] / compiler / nativeGen / RegAlloc / Graph / Coalesce.hs

diff --git a/compiler/nativeGen/RegAlloc/Graph/Coalesce.hs b/compiler/nativeGen/RegAlloc/Graph/Coalesce.hs
index a5d95a3..556f91c 100644 (file)
--- a/compiler/nativeGen/RegAlloc/Graph/Coalesce.hs
+++ b/compiler/nativeGen/RegAlloc/Graph/Coalesce.hs
@@ -25,7 +25,6 @@ import Data.List
 --     For Reg -> Reg moves, if the first reg dies at the same time the second reg is born
 --     then the mov only serves to join live ranges. The two regs can be renamed to be 
 --     the same and the move instruction safely erased.
-
 regCoalesce 
        :: Instruction instr
        => [LiveCmmTop instr] 
@@ -60,7 +59,6 @@ sinkReg fm r
 -- | Slurp out mov instructions that only serve to join live ranges.
 --     During a mov, if the source reg dies and the destiation reg is born
 --     then we can rename the two regs to the same thing and eliminate the move.
---
 slurpJoinMovs 
        :: Instruction instr
        => LiveCmmTop instr 
@@ -73,8 +71,8 @@ slurpJoinMovs live
        slurpCmm   rs (CmmProc _ _ _ sccs)      = foldl' slurpBlock rs (flattenSCCs sccs)
         slurpBlock rs (BasicBlock _ instrs)    = foldl' slurpLI    rs instrs
                 
-        slurpLI    rs (Instr _ Nothing)                 = rs
-       slurpLI    rs (Instr instr (Just live))
+        slurpLI    rs (LiveInstr _     Nothing) = rs
+       slurpLI    rs (LiveInstr instr (Just live))
                | Just (r1, r2) <- takeRegRegMoveInstr instr
                , elementOfUniqSet r1 $ liveDieRead live
                , elementOfUniqSet r2 $ liveBorn live
@@ -86,8 +84,5 @@ slurpJoinMovs live
                
                | otherwise
                = rs
-       
-       slurpLI    rs SPILL{}   = rs
-       slurpLI    rs RELOAD{}  = rs