ghc-7.10.1: The GHC API

Safe HaskellNone
LanguageHaskell2010

MkGraph

Synopsis

Documentation

type CmmAGraph = OrdList CgStmt Source

CmmAGraph is a chunk of code consisting of:

  • ordinary statements (assignments, stores etc.)
  • jumps
  • labels
  • out-of-line labelled blocks

The semantics is that control falls through labels and out-of-line blocks. Everything after a jump up to the next label is by definition unreachable code, and will be discarded.

Two CmmAGraphs can be stuck together with *, with the meaning that control flows from the first to the second.

A CmmAGraph can be turned into a CmmGraph (closed at both ends) by providing a label for the entry point and a tick scope; see labelAGraph.

type CmmAGraphScoped = (CmmAGraph, CmmTickScope) Source

Unlabeled graph with tick scope

data CgStmt Source

Constructors

CgLabel BlockId CmmTickScope 
CgStmt (CmmNode O O) 
CgLast (CmmNode O C) 
CgFork BlockId CmmAGraph CmmTickScope 

(<*>) :: CmmAGraph -> CmmAGraph -> CmmAGraph Source

catAGraphs :: [CmmAGraph] -> CmmAGraph Source

mkLabel :: BlockId -> CmmTickScope -> CmmAGraph Source

created a sequence "goto id; id:" as an AGraph

mkMiddle :: CmmNode O O -> CmmAGraph Source

creates an open AGraph from a given node

mkLast :: CmmNode O C -> CmmAGraph Source

created a closed AGraph from a given node

outOfLine :: BlockId -> CmmAGraphScoped -> CmmAGraph Source

A labelled code block; should end in a last node

lgraphOfAGraph :: CmmAGraphScoped -> UniqSM CmmGraph Source

allocate a fresh label for the entry point

labelAGraph :: BlockId -> CmmAGraphScoped -> CmmGraph Source

use the given BlockId as the label of the entry point

stackStubExpr :: Width -> CmmExpr Source

mkNop :: CmmAGraph Source

mkAssign :: CmmReg -> CmmExpr -> CmmAGraph Source

mkStore :: CmmExpr -> CmmExpr -> CmmAGraph Source

mkUnsafeCall :: ForeignTarget -> [CmmFormal] -> [CmmActual] -> CmmAGraph Source

mkFinalCall :: DynFlags -> CmmExpr -> CCallConv -> [CmmActual] -> UpdFrameOffset -> CmmAGraph Source

mkCallReturnsTo :: DynFlags -> CmmExpr -> Convention -> [CmmActual] -> BlockId -> ByteOff -> UpdFrameOffset -> [CmmActual] -> CmmAGraph Source

mkJumpReturnsTo :: DynFlags -> CmmExpr -> Convention -> [CmmActual] -> BlockId -> ByteOff -> UpdFrameOffset -> CmmAGraph Source

mkJump :: DynFlags -> Convention -> CmmExpr -> [CmmActual] -> UpdFrameOffset -> CmmAGraph Source

mkJumpExtra :: DynFlags -> Convention -> CmmExpr -> [CmmActual] -> UpdFrameOffset -> [CmmActual] -> CmmAGraph Source

mkRawJump :: DynFlags -> CmmExpr -> UpdFrameOffset -> [GlobalReg] -> CmmAGraph Source

A jump where the caller says what the live GlobalRegs are. Used for low-level hand-written Cmm.

mkCbranch :: CmmExpr -> BlockId -> BlockId -> CmmAGraph Source

mkSwitch :: CmmExpr -> [Maybe BlockId] -> CmmAGraph Source

mkReturn :: DynFlags -> CmmExpr -> [CmmActual] -> UpdFrameOffset -> CmmAGraph Source

mkComment :: FastString -> CmmAGraph Source

mkCallEntry :: DynFlags -> Convention -> [CmmFormal] -> [CmmFormal] -> (Int, [GlobalReg], CmmAGraph) Source

mkBranch :: BlockId -> CmmAGraph Source

copyInOflow :: DynFlags -> Convention -> Area -> [CmmFormal] -> [CmmFormal] -> (Int, [GlobalReg], CmmAGraph) Source

copyOutOflow :: DynFlags -> Convention -> Transfer -> Area -> [CmmActual] -> UpdFrameOffset -> [CmmActual] -> (Int, [GlobalReg], CmmAGraph) Source

noExtraStack :: [CmmActual] Source

toCall :: CmmExpr -> Maybe BlockId -> UpdFrameOffset -> ByteOff -> ByteOff -> [GlobalReg] -> CmmAGraph Source

data Transfer Source

Constructors

Call 
JumpRet 
Jump 
Ret 

Instances