monadic stuff fits into the Big Picture.
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module CgMonad (
Code, -- type
FCode, -- type
import VarEnv
import OrdList
import Unique
-import Util
+import Util()
import UniqSupply
-import FastString
+import FastString()
import Outputable
import Control.Monad
+import Data.List
infixr 9 `thenC` -- Right-associative!
infixr 9 `thenFC`
where (block,blocks) = flatten stmts
(CgFork fork_id stmts : ss) ->
flatten (CgFork fork_id stmts : CgStmt stmt : ss)
+ (CgStmt {} : _) -> panic "CgStmt not seen as ordinary"
flatten (s:ss) =
case s of
isJump (CmmJump _ _) = True
isJump (CmmBranch _) = True
isJump (CmmSwitch _ _) = True
+isJump (CmmReturn _) = True
isJump _ = False
isOrdinaryStmt (CgStmt _) = True
labelC id = emitCgStmt (CgLabel id)
newLabelC :: FCode BlockId
-newLabelC = do { id <- newUnique; return (BlockId id) }
+newLabelC = do { u <- newUnique
+ ; return $ BlockId u }
checkedAbsC :: CmmStmt -> Code
-- Emit code, eliminating no-ops
where
data_block = CmmData sect lits
-emitProc :: CmmInfo -> CLabel -> CmmFormals -> [CmmBasicBlock] -> Code
+emitProc :: CmmInfo -> CLabel -> CmmFormalsWithoutKinds -> [CmmBasicBlock] -> Code
emitProc info lbl args blocks
- = do { let proc_block = CmmProc info lbl args blocks
+ = do { let proc_block = CmmProc info lbl args (ListGraph blocks)
; state <- getState
; setState $ state { cgs_tops = cgs_tops state `snocOL` proc_block } }
getCmm :: Code -> FCode Cmm
-- Get all the CmmTops (there should be no stmts)
+-- Return a single Cmm which may be split from other Cmms by
+-- object splitting (at a later stage)
getCmm code
= do { state1 <- getState
; ((), state2) <- withState code (state1 { cgs_tops = nilOL })