module CmmCallConv (
ParamLocation(..),
- ArgumentFormat,
- assignArguments,
- assignArgumentsPos,
- argumentsSize,
+ assignArgumentsPos
) where
#include "HsVersions.h"
-- Calculate the 'GlobalReg' or stack locations for function call
-- parameters as used by the Cmm calling convention.
-data ParamLocation a
+data ParamLocation
= RegisterParam GlobalReg
- | StackParam a
+ | StackParam ByteOff
-instance (Outputable a) => Outputable (ParamLocation a) where
+instance Outputable ParamLocation where
ppr (RegisterParam g) = ppr g
ppr (StackParam p) = ppr p
-type ArgumentFormat a b = [(a, ParamLocation b)]
-
--- Stack parameters are returned as word offsets.
-assignArguments :: (a -> CmmType) -> [a] -> ArgumentFormat a WordOff
-assignArguments _ _ = panic "assignArguments only used in dead codegen" -- assignments
-
-- | JD: For the new stack story, I want arguments passed on the stack to manifest as
-- positive offsets in a CallArea, not negative offsets from the stack pointer.
-- Also, I want byte offsets, not word offsets.
-assignArgumentsPos :: (Outputable a) => Convention -> (a -> CmmType) -> [a] ->
- ArgumentFormat a ByteOff
+assignArgumentsPos :: Convention -> (a -> CmmType) -> [a] ->
+ [(a, ParamLocation)]
+-- Given a list of arguments, and a function that tells their types,
+-- return a list showing where each argument is passed
assignArgumentsPos conv arg_ty reps = assignments
where -- The calling conventions (CgCallConv.hs) are complicated, to say the least
regs = case (reps, conv) of
where w = typeWidth (arg_ty r)
size = (((widthInBytes w - 1) `div` wORD_SIZE) + 1) * wORD_SIZE
off' = offset + size
-
-
-argumentsSize :: (a -> CmmType) -> [a] -> WordOff
-argumentsSize f reps = maximum (0 : map arg_top args)
- where
- args = assignArguments f reps
- arg_top (_, StackParam offset) = -offset
- arg_top (_, RegisterParam _) = 0
-----------------------------------------------------------------------------
-- Local information about the registers available