Added stack checks to the CPS algorithm

[ghc-hetmet.git] / compiler / codeGen / CgMonad.lhs

diff --git a/compiler/codeGen/CgMonad.lhs b/compiler/codeGen/CgMonad.lhs
index 0e4a8a4..d40c511 100644 (file)
--- a/compiler/codeGen/CgMonad.lhs
+++ b/compiler/codeGen/CgMonad.lhs
@@ -32,6 +32,7 @@ module CgMonad (
        EndOfBlockInfo(..),
        setEndOfBlockInfo, getEndOfBlockInfo,
 
+       setSRT, getSRT,
        setSRTLabel, getSRTLabel, 
        setTickyCtrLabel, getTickyCtrLabel,
 
@@ -65,6 +66,7 @@ import PackageConfig
 import Cmm
 import CmmUtils
 import CLabel
+import StgSyn (SRT)
 import SMRep
 import Module
 import Id
@@ -98,7 +100,8 @@ data CgInfoDownwards -- information only passed *downwards* by the monad
        cgd_dflags  :: DynFlags,
        cgd_mod     :: Module,          -- Module being compiled
        cgd_statics :: CgBindings,      -- [Id -> info] : static environment
-       cgd_srt     :: CLabel,          -- label of the current SRT
+       cgd_srt_lbl :: CLabel,          -- label of the current SRT
+        cgd_srt     :: SRT,            -- the current SRT
        cgd_ticky   :: CLabel,          -- current destination for ticky counts
        cgd_eob     :: EndOfBlockInfo   -- Info for stuff to do at end of basic block:
   }
@@ -108,6 +111,7 @@ initCgInfoDown dflags mod
   = MkCgInfoDown {     cgd_dflags  = dflags,
                        cgd_mod     = mod,
                        cgd_statics = emptyVarEnv,
+                       cgd_srt_lbl = error "initC: srt_lbl",
                        cgd_srt     = error "initC: srt",
                        cgd_ticky   = mkTopTickyCtrLabel,
                        cgd_eob     = initEobInfo }
@@ -730,9 +734,9 @@ emitData sect lits
   where
     data_block = CmmData sect lits
 
-emitProc :: [CmmLit] -> CLabel -> [LocalReg] -> [CmmBasicBlock] -> Code
-emitProc lits lbl args blocks
-  = do  { let proc_block = CmmProc (map CmmStaticLit lits) lbl args blocks
+emitProc :: CmmInfo -> CLabel -> CmmFormals -> [CmmBasicBlock] -> Code
+emitProc info lbl args blocks
+  = do  { let proc_block = CmmProc info lbl args blocks
        ; state <- getState
        ; setState $ state { cgs_tops = cgs_tops state `snocOL` proc_block } }
 
@@ -741,7 +745,7 @@ emitSimpleProc :: CLabel -> Code -> Code
 emitSimpleProc lbl code
   = do { stmts <- getCgStmts code
        ; blks <- cgStmtsToBlocks stmts
-       ; emitProc [] lbl [] blks }
+       ; emitProc (CmmNonInfo Nothing) lbl [] blks }
 
 getCmm :: Code -> FCode Cmm
 -- Get all the CmmTops (there should be no stmts)
@@ -828,12 +832,21 @@ getEndOfBlockInfo = do
 
 getSRTLabel :: FCode CLabel    -- Used only by cgPanic
 getSRTLabel = do info  <- getInfoDown
-                return (cgd_srt info)
+                return (cgd_srt_lbl info)
 
 setSRTLabel :: CLabel -> FCode a -> FCode a
 setSRTLabel srt_lbl code
   = do  info <- getInfoDown
-       withInfoDown code (info { cgd_srt = srt_lbl})
+       withInfoDown code (info { cgd_srt_lbl = srt_lbl})
+
+getSRT :: FCode SRT
+getSRT = do info <- getInfoDown
+            return (cgd_srt info)
+
+setSRT :: SRT -> FCode a -> FCode a
+setSRT srt code
+  = do info <- getInfoDown
+       withInfoDown code (info { cgd_srt = srt})
 
 -- ----------------------------------------------------------------------------
 -- Get/set the current ticky counter label