ghc-7.8.2: The GHC API

Safe Haskell | None
Language | Haskell98

RegAlloc.Graph.Stats

Description

Carries interesting info for debugging / profiling of the graph coloring register allocator.

Synopsis

- data RegAllocStats statics instr
  - = RegAllocStatsStart {
    - raLiveCmm :: [LiveCmmDecl statics instr]
    - raGraph :: Graph VirtualReg RegClass RealReg
    - raSpillCosts :: SpillCostInfo
    }
  - | RegAllocStatsSpill {
    - raCode :: [LiveCmmDecl statics instr]
    - raGraph :: Graph VirtualReg RegClass RealReg
    - raCoalesced :: UniqFM VirtualReg
    - raSpillStats :: SpillStats
    - raSpillCosts :: SpillCostInfo
    - raSpilled :: [LiveCmmDecl statics instr]
    }
  - | RegAllocStatsColored {
    - raCode :: [LiveCmmDecl statics instr]
    - raGraph :: Graph VirtualReg RegClass RealReg
    - raGraphColored :: Graph VirtualReg RegClass RealReg
    - raCoalesced :: UniqFM VirtualReg
    - raCodeCoalesced :: [LiveCmmDecl statics instr]
    - raPatched :: [LiveCmmDecl statics instr]
    - raSpillClean :: [LiveCmmDecl statics instr]
    - raFinal :: [NatCmmDecl statics instr]
    - raSRMs :: (Int, Int, Int)
    }
- pprStats :: [RegAllocStats statics instr] -> Graph VirtualReg RegClass RealReg -> SDoc
- pprStatsSpills :: [RegAllocStats statics instr] -> SDoc
- pprStatsLifetimes :: [RegAllocStats statics instr] -> SDoc
- pprStatsConflict :: [RegAllocStats statics instr] -> SDoc
- pprStatsLifeConflict :: [RegAllocStats statics instr] -> Graph VirtualReg RegClass RealReg -> SDoc
- countSRMs :: Instruction instr => LiveCmmDecl statics instr -> (Int, Int, Int)
- addSRM :: (Int, Int, Int) -> (Int, Int, Int) -> (Int, Int, Int)

# Documentation

data RegAllocStats statics instr

Holds interesting statistics from the register allocator.

Constructors

RegAllocStatsStart |
Fields raLiveCmm :: [LiveCmmDecl statics instr] Initial code, with liveness. raGraph :: Graph VirtualReg RegClass RealReg The initial, uncolored graph. raSpillCosts :: SpillCostInfo Information to help choose which regs to spill.
RegAllocStatsSpill |
Fields raCode :: [LiveCmmDecl statics instr] Code we tried to allocate registers for. raGraph :: Graph VirtualReg RegClass RealReg The initial, uncolored graph. raCoalesced :: UniqFM VirtualReg The regs that were coaleced. raSpillStats :: SpillStats Spiller stats. raSpillCosts :: SpillCostInfo Information to help choose which regs to spill. raSpilled :: [LiveCmmDecl statics instr] Code with spill instructions added.
RegAllocStatsColored |
Fields raCode :: [LiveCmmDecl statics instr] Code we tried to allocate registers for. raGraph :: Graph VirtualReg RegClass RealReg The initial, uncolored graph. raGraphColored :: Graph VirtualReg RegClass RealReg Coalesced and colored graph. raCoalesced :: UniqFM VirtualReg The regs that were coaleced. raCodeCoalesced :: [LiveCmmDecl statics instr] Code with coalescings applied. raPatched :: [LiveCmmDecl statics instr] Code with vregs replaced by hregs. raSpillClean :: [LiveCmmDecl statics instr] Code with unneeded spill/reloads cleaned out. raFinal :: [NatCmmDecl statics instr] Final code. raSRMs :: (Int, Int, Int) Spill/reload/reg-reg moves present in this code.

Instances

(Outputable statics, Outputable instr) => Outputable (RegAllocStats statics instr) |

pprStats :: [RegAllocStats statics instr] -> Graph VirtualReg RegClass RealReg -> SDoc

Do all the different analysis on this list of RegAllocStats

pprStatsSpills :: [RegAllocStats statics instr] -> SDoc

Dump a table of how many spill loads / stores were inserted for each vreg.

pprStatsLifetimes :: [RegAllocStats statics instr] -> SDoc

Dump a table of how long vregs tend to live for in the initial code.

pprStatsConflict :: [RegAllocStats statics instr] -> SDoc

Dump a table of how many conflicts vregs tend to have in the initial code.

pprStatsLifeConflict

Arguments

:: [RegAllocStats statics instr] |
-> Graph VirtualReg RegClass RealReg | global register conflict graph
-> SDoc |

For every vreg, dump it's how many conflicts it has and its lifetime good for making a scatter plot.

countSRMs :: Instruction instr => LiveCmmDecl statics instr -> (Int, Int, Int)

Count spillreloadreg-reg moves. Lets us see how well the register allocator has done.

addSRM :: (Int, Int, Int) -> (Int, Int, Int) -> (Int, Int, Int)