GHC.StgToCmm.Foreign

Documentation

cgForeignCall :: ForeignCall -> Type -> [StgArg] -> Type -> FCode ReturnKind

Emit code for a foreign call, and return the results to the sequel. Precondition: the length of the arguments list is the same as the arity of the foreign function.

emitPrimCall :: [CmmFormal] -> CallishMachOp -> [CmmActual] -> FCode ()

emitCCall :: [(CmmFormal, ForeignHint)] -> CmmExpr -> [(CmmActual, ForeignHint)] -> FCode ()

emitForeignCall :: Safety -> [CmmFormal] -> ForeignTarget -> [CmmActual] -> FCode ReturnKind

emitSaveThreadState :: FCode ()

saveThreadState :: MonadUnique m => DynFlags -> m CmmAGraph

Produce code to save the current thread state to CurrentTSO

emitLoadThreadState :: FCode ()

emitSaveRegs :: FCode ()

Save STG registers

STG registers must be saved around a C call, just in case the STG register is mapped to a caller-saves machine register. Normally we don't need to worry about this the code generator has already loaded any live STG registers into variables for us, but in hand-written low-level Cmm code where we don't know which registers are live, we might have to save them all.

emitRestoreRegs :: FCode ()

Restore STG registers (see emitSaveRegs)

loadThreadState :: MonadUnique m => DynFlags -> m CmmAGraph

Produce code to load the current thread state from CurrentTSO

emitOpenNursery :: FCode ()

emitCloseNursery :: FCode ()