ghc-6.12.3: The GHC API Source code Contents Index

RegAlloc.Graph.SpillCost

Synopsis

type SpillCostRecord = (VirtualReg, Int, Int, Int) plusSpillCostRecord :: SpillCostRecord -> SpillCostRecord -> SpillCostRecord pprSpillCostRecord :: (VirtualReg -> RegClass) -> (Reg -> SDoc) -> Graph VirtualReg RegClass RealReg -> SpillCostRecord -> SDoc type SpillCostInfo = UniqFM SpillCostRecord zeroSpillCostInfo :: SpillCostInfo plusSpillCostInfo :: SpillCostInfo -> SpillCostInfo -> SpillCostInfo slurpSpillCostInfo :: (Outputable instr, Instruction instr) => LiveCmmTop instr -> SpillCostInfo chooseSpill :: SpillCostInfo -> Graph VirtualReg RegClass RealReg -> VirtualReg lifeMapFromSpillCostInfo :: SpillCostInfo -> UniqFM (VirtualReg, Int)

Documentation

type SpillCostRecord = (VirtualReg, Int, Int, Int) Source

plusSpillCostRecord :: SpillCostRecord -> SpillCostRecord -> SpillCostRecord Source

pprSpillCostRecord :: (VirtualReg -> RegClass) -> (Reg -> SDoc) -> Graph VirtualReg RegClass RealReg -> SpillCostRecord -> SDoc Source

Show a spill cost record, including the degree from the graph and final calulated spill cos

type SpillCostInfo = UniqFM SpillCostRecord Source

zeroSpillCostInfo :: SpillCostInfo Source

plusSpillCostInfo :: SpillCostInfo -> SpillCostInfo -> SpillCostInfo Source

Add two spillCostInfos

slurpSpillCostInfo :: (Outputable instr, Instruction instr) => LiveCmmTop instr -> SpillCostInfo Source

Slurp out information used for determining spill costs for each vreg, the number of times it was written to, read from, and the number of instructions it was live on entry to (lifetime)

chooseSpill :: SpillCostInfo -> Graph VirtualReg RegClass RealReg -> VirtualReg Source

Choose a node to spill from this graph

lifeMapFromSpillCostInfo :: SpillCostInfo -> UniqFM (VirtualReg, Int) Source

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