Do aggressive register coalescing

[ghc-hetmet.git] / compiler / nativeGen / RegAllocStats.hs

diff --git a/compiler/nativeGen/RegAllocStats.hs b/compiler/nativeGen/RegAllocStats.hs
index aad51c7..ed54532 100644 (file)
--- a/compiler/nativeGen/RegAllocStats.hs
+++ b/compiler/nativeGen/RegAllocStats.hs
@@ -52,6 +52,7 @@ data RegAllocStats
        -- a spill stage
        | RegAllocStatsSpill
        { raGraph       :: Color.Graph Reg RegClass Reg -- ^ the partially colored graph
+       , raCoalesced   :: UniqFM Reg                   -- ^ the regs that were coaleced
        , raSpillStats  :: SpillStats                   -- ^ spiller stats
        , raLifetimes   :: UniqFM (Reg, Int)            -- ^ number of instrs each reg lives for
        , raSpilled     :: [LiveCmmTop] }               -- ^ code with spill instructions added
@@ -59,6 +60,7 @@ data RegAllocStats
        -- a successful coloring
        | RegAllocStatsColored
        { raGraph       :: Color.Graph Reg RegClass Reg -- ^ the colored graph
+       , raCoalesced   :: UniqFM Reg                   -- ^ the regs that were coaleced
        , raPatched     :: [LiveCmmTop]                 -- ^ code with vregs replaced by hregs
        , raSpillClean  :: [LiveCmmTop]                 -- ^ code with unneeded spill/reloads cleaned out
        , raFinal       :: [NatCmmTop]                  -- ^ final code
@@ -74,28 +76,49 @@ instance Outputable RegAllocStats where
        $$ text "#  Initial register conflict graph."
        $$ Color.dotGraph regDotColor trivColorable (raGraph s)
 
+
  ppr (s@RegAllocStatsSpill{})
        =  text "#  Spill"
+
        $$ text "#  Register conflict graph."
        $$ Color.dotGraph regDotColor trivColorable (raGraph s)
        $$ text ""
+
+       $$ (if (not $ isNullUFM $ raCoalesced s)
+               then    text "#  Registers coalesced."
+                       $$ (vcat $ map ppr $ ufmToList $ raCoalesced s)
+                       $$ text ""
+               else empty)
+
        $$ text "#  Spills inserted."
        $$ ppr (raSpillStats s)
        $$ text ""
+
        $$ text "#  Code with spills inserted."
        $$ (ppr (raSpilled s))
 
+
  ppr (s@RegAllocStatsColored { raSRMs = (spills, reloads, moves) })
        =  text "#  Colored"
+
        $$ text "#  Register conflict graph."
        $$ Color.dotGraph regDotColor trivColorable (raGraph s)
        $$ text ""
+
+       $$ (if (not $ isNullUFM $ raCoalesced s)
+               then    text "#  Registers coalesced."
+                       $$ (vcat $ map ppr $ ufmToList $ raCoalesced s)
+                       $$ text ""
+               else empty)
+
        $$ text "#  Native code after register allocation."
        $$ ppr (raPatched s)
        $$ text ""
+
        $$ text "#  Clean out unneeded spill/reloads."
        $$ ppr (raSpillClean s)
        $$ text ""
+
        $$ text "#  Final code, after rewriting spill/rewrite pseudo instrs."
        $$ ppr (raFinal s)
        $$ text ""