import CmmExpr
import CmmUtils
import CLabel
-import MachOp
import StaticFlags
import UniqFM
cmmMiniInlineStmts :: UniqFM Int -> [CmmStmt] -> [CmmStmt]
cmmMiniInlineStmts uses [] = []
-cmmMiniInlineStmts uses (stmt@(CmmAssign (CmmLocal (LocalReg u _ _)) expr) : stmts)
+cmmMiniInlineStmts uses (stmt@(CmmAssign (CmmLocal (LocalReg u _)) expr) : stmts)
-- not used at all: just discard this assignment
| Nothing <- lookupUFM uses u
= cmmMiniInlineStmts uses stmts
-- Try to inline a temporary assignment. We can skip over assignments to
-- other tempoararies, because we know that expressions aren't side-effecting
-- and temporaries are single-assignment.
-lookForInline u expr (stmt@(CmmAssign (CmmLocal (LocalReg u' _ _)) rhs) : rest)
+lookForInline u expr (stmt@(CmmAssign (CmmLocal (LocalReg u' _)) rhs) : rest)
| u /= u'
= case lookupUFM (countUses rhs) u of
Just 1 -> Just (inlineStmt u expr stmt : rest)
= CmmCall (infn target) regs es' srt ret
where infn (CmmCallee fn cconv) = CmmCallee fn cconv
infn (CmmPrim p) = CmmPrim p
- es' = [ (CmmKinded (inlineExpr u a e) hint) | (CmmKinded e hint) <- es ]
+ es' = [ (CmmHinted (inlineExpr u a e) hint) | (CmmHinted e hint) <- es ]
inlineStmt u a (CmmCondBranch e d) = CmmCondBranch (inlineExpr u a e) d
inlineStmt u a (CmmSwitch e d) = CmmSwitch (inlineExpr u a e) d
inlineStmt u a (CmmJump e d) = CmmJump (inlineExpr u a e) d
inlineStmt u a other_stmt = other_stmt
inlineExpr :: Unique -> CmmExpr -> CmmExpr -> CmmExpr
-inlineExpr u a e@(CmmReg (CmmLocal (LocalReg u' _ _)))
+inlineExpr u a e@(CmmReg (CmmLocal (LocalReg u' _)))
| u == u' = a
| otherwise = e
-inlineExpr u a e@(CmmRegOff (CmmLocal (LocalReg u' rep _)) off)
- | u == u' = CmmMachOp (MO_Add rep) [a, CmmLit (CmmInt (fromIntegral off) rep)]
+inlineExpr u a e@(CmmRegOff (CmmLocal (LocalReg u' rep)) off)
+ | u == u' = CmmMachOp (MO_Add width) [a, CmmLit (CmmInt (fromIntegral off) width)]
| otherwise = e
+ where
+ width = typeWidth rep
inlineExpr u a (CmmLoad e rep) = CmmLoad (inlineExpr u a e) rep
inlineExpr u a (CmmMachOp op es) = CmmMachOp op (map (inlineExpr u a) es)
inlineExpr u a other_expr = other_expr
-- "from" type, in order to truncate to the correct size.
-- The final narrow/widen to the destination type
-- is implicit in the CmmLit.
- MO_S_Conv from to
- | isFloatingRep to -> CmmLit (CmmFloat (fromInteger x) to)
- | otherwise -> CmmLit (CmmInt (narrowS from x) to)
- MO_U_Conv from to -> CmmLit (CmmInt (narrowU from x) to)
+ MO_SF_Conv from to -> CmmLit (CmmFloat (fromInteger x) to)
+ MO_SS_Conv from to -> CmmLit (CmmInt (narrowS from x) to)
+ MO_UU_Conv from to -> CmmLit (CmmInt (narrowU from x) to)
_ -> panic "cmmMachOpFold: unknown unary op"
-- Eliminate conversion NOPs
-cmmMachOpFold (MO_S_Conv rep1 rep2) [x] | rep1 == rep2 = x
-cmmMachOpFold (MO_U_Conv rep1 rep2) [x] | rep1 == rep2 = x
+cmmMachOpFold (MO_SS_Conv rep1 rep2) [x] | rep1 == rep2 = x
+cmmMachOpFold (MO_UU_Conv rep1 rep2) [x] | rep1 == rep2 = x
-- Eliminate nested conversions where possible
cmmMachOpFold conv_outer args@[CmmMachOp conv_inner [x]]
cmmMachOpFold (intconv signed1 rep1 rep3) [x]
-- Nested narrowings: collapse
| rep1 > rep2 && rep2 > rep3 ->
- cmmMachOpFold (MO_U_Conv rep1 rep3) [x]
+ cmmMachOpFold (MO_UU_Conv rep1 rep3) [x]
| otherwise ->
CmmMachOp conv_outer args
where
- isIntConversion (MO_U_Conv rep1 rep2)
- | not (isFloatingRep rep1) && not (isFloatingRep rep2)
+ isIntConversion (MO_UU_Conv rep1 rep2)
= Just (rep1,rep2,False)
- isIntConversion (MO_S_Conv rep1 rep2)
- | not (isFloatingRep rep1) && not (isFloatingRep rep2)
+ isIntConversion (MO_SS_Conv rep1 rep2)
= Just (rep1,rep2,True)
isIntConversion _ = Nothing
- intconv True = MO_S_Conv
- intconv False = MO_U_Conv
+ intconv True = MO_SS_Conv
+ intconv False = MO_UU_Conv
-- ToDo: a narrow of a load can be collapsed into a narrow load, right?
-- but what if the architecture only supports word-sized loads, should
= case mop of
-- for comparisons: don't forget to narrow the arguments before
-- comparing, since they might be out of range.
- MO_Eq r -> CmmLit (CmmInt (if x_u == y_u then 1 else 0) wordRep)
- MO_Ne r -> CmmLit (CmmInt (if x_u /= y_u then 1 else 0) wordRep)
+ MO_Eq r -> CmmLit (CmmInt (if x_u == y_u then 1 else 0) wordWidth)
+ MO_Ne r -> CmmLit (CmmInt (if x_u /= y_u then 1 else 0) wordWidth)
- MO_U_Gt r -> CmmLit (CmmInt (if x_u > y_u then 1 else 0) wordRep)
- MO_U_Ge r -> CmmLit (CmmInt (if x_u >= y_u then 1 else 0) wordRep)
- MO_U_Lt r -> CmmLit (CmmInt (if x_u < y_u then 1 else 0) wordRep)
- MO_U_Le r -> CmmLit (CmmInt (if x_u <= y_u then 1 else 0) wordRep)
+ MO_U_Gt r -> CmmLit (CmmInt (if x_u > y_u then 1 else 0) wordWidth)
+ MO_U_Ge r -> CmmLit (CmmInt (if x_u >= y_u then 1 else 0) wordWidth)
+ MO_U_Lt r -> CmmLit (CmmInt (if x_u < y_u then 1 else 0) wordWidth)
+ MO_U_Le r -> CmmLit (CmmInt (if x_u <= y_u then 1 else 0) wordWidth)
- MO_S_Gt r -> CmmLit (CmmInt (if x_s > y_s then 1 else 0) wordRep)
- MO_S_Ge r -> CmmLit (CmmInt (if x_s >= y_s then 1 else 0) wordRep)
- MO_S_Lt r -> CmmLit (CmmInt (if x_s < y_s then 1 else 0) wordRep)
- MO_S_Le r -> CmmLit (CmmInt (if x_s <= y_s then 1 else 0) wordRep)
+ MO_S_Gt r -> CmmLit (CmmInt (if x_s > y_s then 1 else 0) wordWidth)
+ MO_S_Ge r -> CmmLit (CmmInt (if x_s >= y_s then 1 else 0) wordWidth)
+ MO_S_Lt r -> CmmLit (CmmInt (if x_s < y_s then 1 else 0) wordWidth)
+ MO_S_Le r -> CmmLit (CmmInt (if x_s <= y_s then 1 else 0) wordWidth)
MO_Add r -> CmmLit (CmmInt (x + y) r)
MO_Sub r -> CmmLit (CmmInt (x - y) r)
-- then we can do the comparison at the smaller size
= cmmMachOpFold narrow_cmp [x, CmmLit (CmmInt i rep)]
where
- maybe_conversion (MO_U_Conv from to)
+ maybe_conversion (MO_UU_Conv from to)
| to > from
= Just (from, False, narrowU)
- maybe_conversion (MO_S_Conv from to)
- | to > from, not (isFloatingRep from)
+ maybe_conversion (MO_SS_Conv from to)
+ | to > from
= Just (from, True, narrowS)
+
-- don't attempt to apply this optimisation when the source
-- is a float; see #1916
maybe_conversion _ = Nothing
MO_Eq r | Just x' <- maybeInvertCmmExpr x -> x'
MO_U_Gt r | isComparisonExpr x -> x
MO_S_Gt r | isComparisonExpr x -> x
- MO_U_Lt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordRep)
- MO_S_Lt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordRep)
- MO_U_Ge r | isComparisonExpr x -> CmmLit (CmmInt 1 wordRep)
- MO_S_Ge r | isComparisonExpr x -> CmmLit (CmmInt 1 wordRep)
+ MO_U_Lt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordWidth)
+ MO_S_Lt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordWidth)
+ MO_U_Ge r | isComparisonExpr x -> CmmLit (CmmInt 1 wordWidth)
+ MO_S_Ge r | isComparisonExpr x -> CmmLit (CmmInt 1 wordWidth)
MO_U_Le r | Just x' <- maybeInvertCmmExpr x -> x'
MO_S_Le r | Just x' <- maybeInvertCmmExpr x -> x'
other -> CmmMachOp mop args
MO_Eq r | isComparisonExpr x -> x
MO_U_Lt r | Just x' <- maybeInvertCmmExpr x -> x'
MO_S_Lt r | Just x' <- maybeInvertCmmExpr x -> x'
- MO_U_Gt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordRep)
- MO_S_Gt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordRep)
- MO_U_Le r | isComparisonExpr x -> CmmLit (CmmInt 1 wordRep)
- MO_S_Le r | isComparisonExpr x -> CmmLit (CmmInt 1 wordRep)
+ MO_U_Gt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordWidth)
+ MO_S_Gt r | isComparisonExpr x -> CmmLit (CmmInt 0 wordWidth)
+ MO_U_Le r | isComparisonExpr x -> CmmLit (CmmInt 1 wordWidth)
+ MO_S_Le r | isComparisonExpr x -> CmmLit (CmmInt 1 wordWidth)
MO_U_Ge r | isComparisonExpr x -> x
MO_S_Ge r | isComparisonExpr x -> x
other -> CmmMachOp mop args
-- x1 = x >> word_size-1 (unsigned)
-- return = (x + x1) >>= log2(divisor)
let
- bits = fromIntegral (machRepBitWidth rep) - 1
+ bits = fromIntegral (widthInBits rep) - 1
shr = if p == 1 then MO_U_Shr rep else MO_S_Shr rep
x1 = CmmMachOp shr [x, CmmLit (CmmInt bits rep)]
x2 = if p == 1 then x1 else
-- -----------------------------------------------------------------------------
-- widening / narrowing
-narrowU :: MachRep -> Integer -> Integer
-narrowU I8 x = fromIntegral (fromIntegral x :: Word8)
-narrowU I16 x = fromIntegral (fromIntegral x :: Word16)
-narrowU I32 x = fromIntegral (fromIntegral x :: Word32)
-narrowU I64 x = fromIntegral (fromIntegral x :: Word64)
+narrowU :: Width -> Integer -> Integer
+narrowU W8 x = fromIntegral (fromIntegral x :: Word8)
+narrowU W16 x = fromIntegral (fromIntegral x :: Word16)
+narrowU W32 x = fromIntegral (fromIntegral x :: Word32)
+narrowU W64 x = fromIntegral (fromIntegral x :: Word64)
narrowU _ _ = panic "narrowTo"
-narrowS :: MachRep -> Integer -> Integer
-narrowS I8 x = fromIntegral (fromIntegral x :: Int8)
-narrowS I16 x = fromIntegral (fromIntegral x :: Int16)
-narrowS I32 x = fromIntegral (fromIntegral x :: Int32)
-narrowS I64 x = fromIntegral (fromIntegral x :: Int64)
+narrowS :: Width -> Integer -> Integer
+narrowS W8 x = fromIntegral (fromIntegral x :: Int8)
+narrowS W16 x = fromIntegral (fromIntegral x :: Int16)
+narrowS W32 x = fromIntegral (fromIntegral x :: Int32)
+narrowS W64 x = fromIntegral (fromIntegral x :: Int64)
narrowS _ _ = panic "narrowTo"
-- -----------------------------------------------------------------------------
projects / ghc-hetmet.git / blobdiff