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|
{-# LANGUAGE CPP #-}
--------------------------------------------------------------------------------
-- | Deal with Cmm registers
--
module LlvmCodeGen.Regs (
lmGlobalRegArg, lmGlobalRegVar, alwaysLive,
stgTBAA, baseN, stackN, heapN, rxN, topN, tbaa, getTBAA
) where
#include "HsVersions.h"
import GhcPrelude
import Llvm
import CmmExpr
import DynFlags
import FastString
import Outputable ( panic )
import Unique
-- | Get the LlvmVar function variable storing the real register
lmGlobalRegVar :: DynFlags -> GlobalReg -> LlvmVar
lmGlobalRegVar dflags = pVarLift . lmGlobalReg dflags "_Var"
-- | Get the LlvmVar function argument storing the real register
lmGlobalRegArg :: DynFlags -> GlobalReg -> LlvmVar
lmGlobalRegArg dflags = lmGlobalReg dflags "_Arg"
{- Need to make sure the names here can't conflict with the unique generated
names. Uniques generated names containing only base62 chars. So using say
the '_' char guarantees this.
-}
lmGlobalReg :: DynFlags -> String -> GlobalReg -> LlvmVar
lmGlobalReg dflags suf reg
= case reg of
BaseReg -> ptrGlobal $ "Base" ++ suf
Sp -> ptrGlobal $ "Sp" ++ suf
Hp -> ptrGlobal $ "Hp" ++ suf
VanillaReg 1 _ -> wordGlobal $ "R1" ++ suf
VanillaReg 2 _ -> wordGlobal $ "R2" ++ suf
VanillaReg 3 _ -> wordGlobal $ "R3" ++ suf
VanillaReg 4 _ -> wordGlobal $ "R4" ++ suf
VanillaReg 5 _ -> wordGlobal $ "R5" ++ suf
VanillaReg 6 _ -> wordGlobal $ "R6" ++ suf
VanillaReg 7 _ -> wordGlobal $ "R7" ++ suf
VanillaReg 8 _ -> wordGlobal $ "R8" ++ suf
SpLim -> wordGlobal $ "SpLim" ++ suf
FloatReg 1 -> floatGlobal $"F1" ++ suf
FloatReg 2 -> floatGlobal $"F2" ++ suf
FloatReg 3 -> floatGlobal $"F3" ++ suf
FloatReg 4 -> floatGlobal $"F4" ++ suf
FloatReg 5 -> floatGlobal $"F5" ++ suf
FloatReg 6 -> floatGlobal $"F6" ++ suf
DoubleReg 1 -> doubleGlobal $ "D1" ++ suf
DoubleReg 2 -> doubleGlobal $ "D2" ++ suf
DoubleReg 3 -> doubleGlobal $ "D3" ++ suf
DoubleReg 4 -> doubleGlobal $ "D4" ++ suf
DoubleReg 5 -> doubleGlobal $ "D5" ++ suf
DoubleReg 6 -> doubleGlobal $ "D6" ++ suf
XmmReg 1 -> xmmGlobal $ "XMM1" ++ suf
XmmReg 2 -> xmmGlobal $ "XMM2" ++ suf
XmmReg 3 -> xmmGlobal $ "XMM3" ++ suf
XmmReg 4 -> xmmGlobal $ "XMM4" ++ suf
XmmReg 5 -> xmmGlobal $ "XMM5" ++ suf
XmmReg 6 -> xmmGlobal $ "XMM6" ++ suf
YmmReg 1 -> ymmGlobal $ "YMM1" ++ suf
YmmReg 2 -> ymmGlobal $ "YMM2" ++ suf
YmmReg 3 -> ymmGlobal $ "YMM3" ++ suf
YmmReg 4 -> ymmGlobal $ "YMM4" ++ suf
YmmReg 5 -> ymmGlobal $ "YMM5" ++ suf
YmmReg 6 -> ymmGlobal $ "YMM6" ++ suf
ZmmReg 1 -> zmmGlobal $ "ZMM1" ++ suf
ZmmReg 2 -> zmmGlobal $ "ZMM2" ++ suf
ZmmReg 3 -> zmmGlobal $ "ZMM3" ++ suf
ZmmReg 4 -> zmmGlobal $ "ZMM4" ++ suf
ZmmReg 5 -> zmmGlobal $ "ZMM5" ++ suf
ZmmReg 6 -> zmmGlobal $ "ZMM6" ++ suf
MachSp -> wordGlobal $ "MachSp" ++ suf
_other -> panic $ "LlvmCodeGen.Reg: GlobalReg (" ++ (show reg)
++ ") not supported!"
-- LongReg, HpLim, CCSS, CurrentTSO, CurrentNusery, HpAlloc
-- EagerBlackholeInfo, GCEnter1, GCFun, BaseReg, PicBaseReg
where
wordGlobal name = LMNLocalVar (fsLit name) (llvmWord dflags)
ptrGlobal name = LMNLocalVar (fsLit name) (llvmWordPtr dflags)
floatGlobal name = LMNLocalVar (fsLit name) LMFloat
doubleGlobal name = LMNLocalVar (fsLit name) LMDouble
xmmGlobal name = LMNLocalVar (fsLit name) (LMVector 4 (LMInt 32))
ymmGlobal name = LMNLocalVar (fsLit name) (LMVector 8 (LMInt 32))
zmmGlobal name = LMNLocalVar (fsLit name) (LMVector 16 (LMInt 32))
-- | A list of STG Registers that should always be considered alive
alwaysLive :: [GlobalReg]
alwaysLive = [BaseReg, Sp, Hp, SpLim, HpLim, node]
-- | STG Type Based Alias Analysis hierarchy
stgTBAA :: [(Unique, LMString, Maybe Unique)]
stgTBAA
= [ (rootN, fsLit "root", Nothing)
, (topN, fsLit "top", Just rootN)
, (stackN, fsLit "stack", Just topN)
, (heapN, fsLit "heap", Just topN)
, (rxN, fsLit "rx", Just heapN)
, (baseN, fsLit "base", Just topN)
-- FIX: Not 100% sure if this hierarchy is complete. I think the big thing
-- is Sp is never aliased, so might want to change the hierarchy to have Sp
-- on its own branch that is never aliased (e.g never use top as a TBAA
-- node).
]
-- | Id values
-- The `rootN` node is the root (there can be more than one) of the TBAA
-- hierarchy and as of LLVM 4.0 should *only* be referenced by other nodes. It
-- should never occur in any LLVM instruction statement.
rootN, topN, stackN, heapN, rxN, baseN :: Unique
rootN = getUnique (fsLit "LlvmCodeGen.Regs.rootN")
topN = getUnique (fsLit "LlvmCodeGen.Regs.topN")
stackN = getUnique (fsLit "LlvmCodeGen.Regs.stackN")
heapN = getUnique (fsLit "LlvmCodeGen.Regs.heapN")
rxN = getUnique (fsLit "LlvmCodeGen.Regs.rxN")
baseN = getUnique (fsLit "LlvmCodeGen.Regs.baseN")
-- | The TBAA metadata identifier
tbaa :: LMString
tbaa = fsLit "tbaa"
-- | Get the correct TBAA metadata information for this register type
getTBAA :: GlobalReg -> Unique
getTBAA BaseReg = baseN
getTBAA Sp = stackN
getTBAA Hp = heapN
getTBAA (VanillaReg _ _) = rxN
getTBAA _ = topN
|
