ghc-6.12.2: The GHC API Source code Contents Index

RegAlloc.Linear.StackMap

Description

The assignment of virtual registers to stack slots

Synopsis

type StackSlot = Int data StackMap = StackMap { stackMapFreeSlots :: [StackSlot] stackMapAssignment :: UniqFM StackSlot } emptyStackMap :: StackMap getStackSlotFor :: StackMap -> Unique -> (StackMap, Int)

Documentation

type StackSlot = Int Source

Identifier for a stack slot.

data StackMap Source

Constructors StackMap stackMapFreeSlots :: [StackSlot] The slots that are still available to be allocated. stackMapAssignment :: UniqFM StackSlot Assignment of vregs to stack slots.

emptyStackMap :: StackMap Source

An empty stack map, with all slots available.

getStackSlotFor :: StackMap -> Unique -> (StackMap, Int) Source

If this vreg unique already has a stack assignment then return the slot number, otherwise allocate a new slot, and update the map.

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