import MachOp
import SMRep
import ForeignCall
+import ClosureInfo
import Constants
import StaticFlags
import Outputable
-import MachRegs (callerSaveVolatileRegs)
- -- HACK: this is part of the NCG so we shouldn't use this, but we need
- -- it for now to eliminate the need for saved regs to be in CmmCall.
- -- The long term solution is to factor callerSaveVolatileRegs
- -- from nativeGen into codeGen
-
import Control.Monad
-- -----------------------------------------------------------------------------
emitForeignCall results (CCall (CCallSpec target cconv safety)) args live
= do vols <- getVolatileRegs live
+ srt <- getSRTInfo
emitForeignCall' safety results
- (CmmForeignCall cmm_target cconv) call_args (Just vols)
+ (CmmForeignCall cmm_target cconv) call_args (Just vols) srt
where
(call_args, cmm_target)
= case target of
-- ToDo: this might not be correct for 64-bit API
arg_size rep = max (machRepByteWidth rep) wORD_SIZE
-emitForeignCall results (DNCall _) args live
+emitForeignCall _ (DNCall _) _ _
= panic "emitForeignCall: DNCall"
-> CmmCallTarget -- the op
-> [(CmmExpr,MachHint)] -- arguments
-> Maybe [GlobalReg] -- live vars, in case we need to save them
+ -> C_SRT -- the SRT of the calls continuation
-> Code
-emitForeignCall' safety results target args vols
+emitForeignCall' safety results target args vols srt
| not (playSafe safety) = do
temp_args <- load_args_into_temps args
let (caller_save, caller_load) = callerSaveVolatileRegs vols
stmtsC caller_save
- stmtC (CmmCall target results temp_args)
+ stmtC (CmmCall target results temp_args CmmUnsafe)
stmtsC caller_load
| otherwise = do
let (caller_save, caller_load) = callerSaveVolatileRegs vols
emitSaveThreadState
stmtsC caller_save
+ -- The CmmUnsafe arguments are only correct because this part
+ -- of the code hasn't been moved into the CPS pass yet.
+ -- Once that happens, this function will just emit a (CmmSafe srt) call,
+ -- and the CPS will will be the one to convert that
+ -- to this sequence of three CmmUnsafe calls.
stmtC (CmmCall (CmmForeignCall suspendThread CCallConv)
[ (id,PtrHint) ]
[ (CmmReg (CmmGlobal BaseReg), PtrHint) ]
- )
- stmtC (CmmCall temp_target results temp_args)
+ CmmUnsafe)
+ stmtC (CmmCall temp_target results temp_args CmmUnsafe)
stmtC (CmmCall (CmmForeignCall resumeThread CCallConv)
[ (new_base, PtrHint) ]
[ (CmmReg (CmmLocal id), PtrHint) ]
- )
+ CmmUnsafe)
-- Assign the result to BaseReg: we
-- might now have a different Capability!
stmtC (CmmAssign (CmmGlobal BaseReg) (CmmReg (CmmLocal new_base)))