X-Git-Url: http://git.joshuawise.com/snipe.git/blobdiff_plain/6ade8b0a3251e44b34c6bdbbd9403e36d6fd6231..de034162d9af50e6bfb454f4de67213d856137c4:/codegen/solidify.sml diff --git a/codegen/solidify.sml b/codegen/solidify.sml index 8c39017..07ae420 100644 --- a/codegen/solidify.sml +++ b/codegen/solidify.sml @@ -22,29 +22,34 @@ struct type asm = x86.insn list exception Spilled - + + structure TempMap = SplayMapFn(struct + type ord_key = Temp.temp + val compare = Temp.compare + end) + structure Tm = Temp + fun solidify (regmap : colorings) (instrs : asm) : asm = let (* r14d and r15d is reserved for spilling *) - val maxreg = X.regtonum X.R14D + val maxreg = X.regtonum X.R13D fun numtoreg n = if (n > maxreg) then raise Spilled else X.numtoreg n - - fun temptonum (t: T.temp) : int = - (List.hd - (List.map (fn (_, n) => n) - (List.filter (fn (a, _) => (Temp.eq (a, t))) regmap))) - + + val tempnums = List.foldr (fn ((t,n),b) => TempMap.insert(b,t,n)) (TempMap.empty) regmap + fun temptonum (t: T.temp) : int = valOf (TempMap.find (tempnums, t)) + fun temptoreg (t: T.temp) : x86.reg = numtoreg (temptonum t) handle Empty => raise ErrorMsg.InternalError ("Uncolored temp "^(Temp.name t)^", agh!") val spillreg1 = X.R15D + val spillreg2 = X.R14D (* Determine which need to be saved. *) - val opsused = map (fn (_, n) => X.REG (numtoreg n handle Spilled => X.R15D)) regmap + val opsused = (map (fn (_, n) => X.REG (numtoreg n handle Spilled => X.R15D)) regmap) @ [X.REG X.R14D] val saveregs = X.OperSet.intersection ( X.OperSet.addList (X.OperSet.empty, opsused), X.OperSet.addList ( @@ -58,99 +63,155 @@ struct val savelist = X.OperSet.listItems saveregs val nsave = length savelist - val numreg = foldr (Int.max) 0 (map (fn (_, n) => n) regmap) (* Number of registers used. *) - val nspilled = Int.max (numreg - maxreg, 0) (* Number of spilled registers. *) - fun isspilled (X.TEMP temp) = (((temptonum temp) > maxreg) handle Empty => false) (* Whether a register is spilled *) - | isspilled (X.STACKARG _) = true - | isspilled (X.REL _) = true + val numreg = foldr (Int.max) 0 (map (fn (_, n) => n) regmap) (* Number of registers used. *) + val nspilled = Int.max (numreg - maxreg, 0) (* Number of spilled registers. *) + fun isspilled (X.TEMP temp, _) = (temptonum temp) > maxreg (* Whether a register is spilled *) + | isspilled (X.STACKARG _, _) = true + | isspilled (X.REL _, _) = true | isspilled _ = false + val stacksz = (nspilled + nsave) * 8 - fun stackpos (reg: int) = stacksz - (reg - maxreg + nsave) * 8 (* Stack position of some register number *) + fun stackpos (reg: int) = stacksz - (reg - maxreg + nsave) * 8 (* Stack position of some register number *) val prologue = - (X.SIZE (X.Qword, X.SUB (X.REG X.RSP, X.CONST (Word32.fromInt stacksz)))) :: + (X.SUB ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt stacksz), Tm.Quad))) :: (ListPair.map (fn (num, reg) => - X.SIZE (X.Qword, X.MOV (X.REL (X.RSP, stacksz - 8*(num+1)), reg))) + X.MOV ((X.REL ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt (stacksz - 8*(num+1))), Tm.Quad), 0w1), Tm.Quad), (reg, Tm.Quad))) (List.tabulate (nsave, fn x => x), savelist)) val epilogue = (ListPair.map (fn (num, reg) => - X.SIZE (X.Qword, X.MOV (reg, X.REL (X.RSP, stacksz - 8*(num+1))))) + X.MOV ((reg, Tm.Quad), (X.REL ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt (stacksz - 8*(num+1))), Tm.Quad), 0w1), Tm.Quad))) (List.tabulate (nsave, fn x => x), savelist)) @ - [X.SIZE (X.Qword, X.ADD (X.REG X.RSP, X.CONST (Word32.fromInt stacksz)))] + [X.ADD ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt stacksz), Tm.Quad))] val endlbl = Label.new() - fun spill (X.TEMP temp, xreg: x86.reg) = (* Spill a register if need be. *) - if (isspilled (X.TEMP temp)) - then [X.MOV (X.REL (X.RSP, stackpos (temptonum temp)), X.REG xreg)] - else nil - | spill (X.STACKARG _, _) = raise ErrorMsg.InternalError "Cannot spill to a stack arg" - | spill (a as X.REL _, xreg) = [X.MOV (a, X.REG xreg)] - | spill _ = nil (* Nothing else can be spilled. *) - fun unspill (X.TEMP temp, xreg: x86.reg) = (* Unspill a register if need be. *) - if (isspilled (X.TEMP temp)) - then [X.MOV (X.REG xreg, X.REL (X.RSP, stackpos (temptonum temp)))] - else nil - | unspill (X.STACKARG arg, xreg) = [X.MOV (X.REG xreg, X.REL (X.RSP, stacksz + 8 + (arg * 8)))] - | unspill (a as X.REL _, xreg) = [X.MOV (X.REG xreg, a)] + fun spill ((X.TEMP temp, s), xreg: x86.reg) = (* Spill a register if need be. *) + let + val base = (X.REG X.RSP, Tm.Quad) + val offs = (X.CONST (Word32.fromInt (stackpos (temptonum temp))), Tm.Quad) + in + if (isspilled (X.TEMP temp, s)) + then [X.MOV ((X.REL (base, offs, 0w1), Tm.Quad), (X.REG xreg, Tm.Quad))] + else nil + end + | spill ((X.STACKARG _, s), _) = raise ErrorMsg.InternalError "Cannot spill to a stack arg" + | spill ((a as X.REL _, s), xreg) = [X.MOV ((a,s), (X.REG xreg,s))] + | spill _ = nil (* Nothing else can be spilled. *) + fun unspill ((X.TEMP temp, s), xreg: x86.reg) = (* Unspill a register if need be. *) + let + val base = (X.REG X.RSP, Tm.Quad) + val offs = (X.CONST (Word32.fromInt (stackpos (temptonum temp))), Tm.Quad) + in + if (isspilled (X.TEMP temp, s)) + then [X.MOV ((X.REG xreg, Tm.Quad), (X.REL (base, offs, 0w1), Tm.Quad))] + else nil + end + | unspill ((X.STACKARG arg, s), xreg) = + let + val base = (X.REG X.RSP, Tm.Quad) + val offs = (X.CONST (Word32.fromInt (stacksz + 8 + (arg * 8))), Tm.Quad) + in + [X.MOV ((X.REG xreg, s), (X.REL (base, offs, 0w1), s))] + end + | unspill ((a as X.REL _, s), xreg) = [X.MOV ((X.REG xreg, s), (a,s))] | unspill _ = nil - - fun realoper (X.TEMP temp) = X.REG (temptoreg temp) (* Makes a operand 'real'. *) - | realoper (X.STACKARG arg) = raise Spilled - | realoper (X.REL _) = raise Spilled + + fun realoper (X.TEMP temp, s) = (X.REG (temptoreg temp), s) (* makes an operand 'real' *) + | realoper (X.STACKARG arg, _) = raise Spilled + | realoper (X.REL _, _) = raise Spilled | realoper r = r - fun stackoper (X.TEMP temp) = - if not (isspilled (X.TEMP temp)) then raise ErrorMsg.InternalError "stackoper on unspilled temp?" - else X.REL (X.RSP, stackpos (temptonum temp)) - | stackoper (X.STACKARG arg) = X.REL (X.RSP, stacksz + 8 + (arg * 8)) - | stackoper (a as X.REL _) = a - | stackoper _ = raise ErrorMsg.InternalError "stackoper on not temp?" - + fun stackoper (X.TEMP temp, s) = + let + val base = (X.REG X.RSP, Tm.Quad) + val offs = (X.CONST (Word32.fromInt (stackpos (temptonum temp))), Tm.Quad) + in + if (isspilled (X.TEMP temp, s)) + then (X.REL (base, offs, 0w1), s) + else raise ErrorMsg.InternalError "stackoper on unspilled temp?" + end + | stackoper (X.STACKARG arg, s) = + let + val base = (X.REG X.RSP, Tm.Quad) + val offs = (X.CONST (Word32.fromInt (stacksz + 8 + (arg * 8))), Tm.Quad) + in + (X.REL (base, offs, 0w1), s) + end + | stackoper (a as (X.REL _, s)) = a + | stackoper (a as (X.CONST _, s)) = a + | stackoper anous = raise ErrorMsg.InternalError ("stackoper on not temp " ^ X.pp_oper anous) + + fun ophit (X.REL(op1, op2, m), s) = + if (isspilled op1 andalso isspilled op2) then + ([X.MOV ((X.REG spillreg1, Tm.Long), stackoper op2), + X.IMUL((X.REG spillreg1, Tm.Quad), (X.CONST m, Tm.Quad)), + X.ADD ((X.REG spillreg1, Tm.Quad), stackoper op1)], + (X.REL ((X.REG spillreg1, Tm.Quad), (X.CONST 0w0, Tm.Quad), 0w1), s)) + else if(isspilled op1) then + ([X.MOV ((X.REG spillreg1, Tm.Quad), stackoper op1)], + (X.REL ((X.REG spillreg1, Tm.Quad), realoper op2, m), s)) + else if(isspilled op2) then + ([X.MOV ((X.REG spillreg1, Tm.Long), stackoper op2)], + (X.REL (realoper op1, (X.REG spillreg1, Tm.Quad), m), s)) + else + ([], + (X.REL (realoper op1, realoper op2, m), s)) + | ophit a = (nil, realoper a handle Spilled => stackoper a) + fun transform (X.DIRECTIVE s) = [X.DIRECTIVE s] | transform (X.COMMENT s) = [X.COMMENT s] | transform (X.LIVEIGN a) = transform a - | transform (X.SIZE (s, i)) = map (fn i' => (X.SIZE (s, i'))) (transform i) | transform (X.MOV (dest, src)) = - if (isspilled dest) - then - unspill (src, spillreg1) @ - [X.MOV( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - else - [X.MOV( - realoper dest handle Spilled => raise ErrorMsg.InternalError "But we said that wasn't spilled?", - realoper src handle Spilled => stackoper src)] + let + val (insns1, realop1 as (_,s1)) = ophit dest + val (insns2, realop2 as (_,s2)) = ophit src + in + if(isspilled dest andalso isspilled src) then + insns2 @ [X.MOV ((X.REG spillreg2, s2), realop2)] @ insns1 @ [X.MOV (realop1, (X.REG spillreg2, s1))] + else + insns1 @ insns2 @ [X.MOV (realop1, realop2)] + end + | transform (X.LEA (dest, src)) = + let + val (insns1, realop1 as (_,s1)) = ophit dest + val (insns2, realop2 as (_,s2)) = ophit src + in + if(isspilled dest andalso isspilled src) then + insns2 @ [X.LEA ((X.REG spillreg2, s2), realop2)] @ insns1 @ [X.MOV (realop1, (X.REG spillreg2, s1))] + else + insns1 @ insns2 @ [X.LEA (realop1, realop2)] + end | transform (X.SUB (dest, src)) = - unspill (src, spillreg1) @ - [ X.SUB( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] + let + val (insns, realop) = ophit dest + in + unspill (src, spillreg2) @ insns @ + [ X.SUB(realop, + realoper src handle Spilled => (X.REG spillreg2, X.osize realop))] + end | transform (X.IMUL (dest, src)) = unspill (dest, spillreg1) @ [ X.IMUL( - realoper dest handle Spilled => X.REG spillreg1, + realoper dest handle Spilled => (X.REG spillreg1, X.osize dest), realoper src handle Spilled => stackoper src)] @ spill (dest, spillreg1) | transform (X.IMUL3 (dest, src, const)) = + unspill (src, spillreg2) @ [ X.IMUL3( - realoper dest handle Spilled => X.REG spillreg1, - realoper src handle Spilled => stackoper src, + realoper dest handle Spilled => (X.REG spillreg1, X.osize dest), + realoper src handle Spilled => (X.REG spillreg2, X.osize src), const)] @ spill (dest, spillreg1) - | transform (X.ADD (dest, src)) = (* You can have either operand spilled, but not both. Pick one. *) - if (isspilled dest) - then - unspill (src, spillreg1) @ - [ X.ADD( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - else - [ X.ADD( - realoper dest handle Spilled => raise ErrorMsg.InternalError "But we said that wasn't spilled?", - realoper src handle Spilled => stackoper src)] + | transform (X.ADD (dest, src)) = + let + val (insns, realop) = ophit dest + in + unspill (src, spillreg2) @ insns @ + [ X.ADD(realop, + realoper src handle Spilled => (X.REG spillreg2, X.osize realop))] + end | transform (X.IDIV (src)) = [ X.IDIV(realoper src handle Spilled => stackoper src)] | transform (X.NEG (src)) = [ X.NEG(realoper src handle Spilled => stackoper src)] | transform (X.NOT (src)) = [ X.NOT(realoper src handle Spilled => stackoper src)] @@ -167,38 +228,53 @@ struct unspill (src, spillreg1) @ [ X.AND( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] | transform (X.OR (dest, src)) = unspill (src, spillreg1) @ [ X.OR( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] | transform (X.XOR (dest, src)) = unspill (src, spillreg1) @ [ X.XOR( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] | transform (X.CMP (op1, op2)) = - unspill (op2, spillreg1) @ - [ X.CMP( - realoper op1 handle Spilled => stackoper op1, - realoper op2 handle Spilled => X.REG spillreg1)] + let + val (insns1, realop1) = ophit op1 + in + if(isspilled realop1 andalso isspilled op2) then + unspill (op2, spillreg2) @ insns1 @ [X.CMP (realop1, (X.REG spillreg2, X.osize realop1))] + else + insns1 @ [X.CMP (realop1, realoper op2 handle Spilled => stackoper op2)] + end | transform (X.TEST (op1, op2)) = unspill (op2, spillreg1) @ [ X.TEST( realoper op1 handle Spilled => stackoper op1, - realoper op2 handle Spilled => X.REG spillreg1)] + realoper op2 handle Spilled => (X.REG spillreg1, X.osize op2))] | transform (X.SETcc (c,src)) = [ X.SETcc(c, realoper src handle Spilled => stackoper src)] + | transform (X.CMOVcc (c, dest, src)) = + let + val (insns1, realop1) = ophit dest + val (insns2, realop2) = ophit src + in + if(isspilled dest andalso isspilled src) then + insns2 @ [X.MOV ((X.REG spillreg2, X.osize src), realop2)] @ insns1 @ [X.CMOVcc (c, realop1, (X.REG spillreg2, X.osize src))] + else + insns1 @ insns2 @ [X.CMOVcc (c, realop1, realop2)] + end | transform (X.CALL l) = [ X.CALL l ] | transform (X.MOVZB (dest, src)) = [ X.MOVZB( - realoper dest handle Spilled => X.REG spillreg1, + realoper dest handle Spilled => (X.REG spillreg1, X.osize dest), realoper src handle Spilled => stackoper src)] @ spill (dest, spillreg1) | transform (X.RET) = if nsave < 2 then (epilogue @ [X.RET]) else [X.JMP endlbl] | transform (X.LABEL l) = [ X.LABEL l ] | transform (X.JMP l) = [ X.JMP l ] | transform (X.Jcc (c,l)) = [X.Jcc (c,l)] + | transform _ = raise ErrorMsg.InternalError "probably movsc: unimplemented" in if (nsave < 2) then List.concat (prologue :: (map transform instrs))