ghc-7.8.3: The GHC API

Safe HaskellNone
LanguageHaskell98

RegAlloc.Linear.StackMap

Description

The assignment of virtual registers to stack slots

Synopsis

Documentation

type StackSlot = Int Source

Identifier for a stack slot.

data StackMap Source

Constructors

StackMap 

Fields

stackMapNextFreeSlot :: !Int

The slots that are still available to be allocated.

stackMapAssignment :: UniqFM StackSlot

Assignment of vregs to stack slots.

emptyStackMap :: DynFlags -> 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.

getStackUse :: StackMap -> Int Source

Return the number of stack slots that were allocated