X-Git-Url: http://git.joshuawise.com/snipe.git/blobdiff_plain/0a24e44d4e9f82f8d3d83de8e58c83c8cf2868b6..141a7120aec6ddf3ab097f275498d8e3a1b90401:/codegen/solidify.sml?ds=inline diff --git a/codegen/solidify.sml b/codegen/solidify.sml index 48fad39..07ae420 100644 --- a/codegen/solidify.sml +++ b/codegen/solidify.sml @@ -1,4 +1,4 @@ -(* L2 Compiler +(* L3 Compiler * Takes a list of mappings of temporaries to colors and a pseudoasm listing, * then produces x86 code. * Author: Chris Lu @@ -22,7 +22,13 @@ 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 *) @@ -31,144 +37,248 @@ struct 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.compare (a, t) = EQUAL)) 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 => - (ErrorMsg.warn NONE ("Uncolored temp "^(Temp.name t)^" -- dead code?") ; - X.R15D) (*If we don't care about the output, then it is cool to explode this; R15D is guaranteed not to be used across builtin blocks.*) - - val spillreg1 = X.R14D - - val prologue = [X.DIRECTIVE "\tpush %rbx\n\tpush %r12\n\tpush %r13\n\tpush %r14\n\tpush %r15"] (* Could be done better. *) - val epilogue = [X.DIRECTIVE "\tpop %r15\n\tpop %r14\n\tpop %r13\n\tpop %r12\n\tpop %rbx"] - - 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 *) + 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) @ [X.REG X.R14D] + val saveregs = X.OperSet.intersection ( + X.OperSet.addList (X.OperSet.empty, opsused), + X.OperSet.addList ( + X.OperSet.empty, + [X.REG X.EBX, + X.REG X.EBP, + X.REG X.R12D, + X.REG X.R13D, + X.REG X.R14D, + X.REG X.R15D])) + 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 (* Whether a register is spilled *) + | isspilled (X.STACKARG _, _) = true + | isspilled (X.REL _, _) = true | isspilled _ = false - fun stackpos (reg: int) = (reg - maxreg) * ~4 (* Stack position of some register number *) - - fun spill (X.TEMP temp, xreg: x86.reg) = (* Spill a register if need be. *) - if (isspilled (X.TEMP temp)) - then [X.MOVL (X.REL (X.RSP, stackpos (temptonum temp)), X.REG xreg)] - else nil - | 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.MOVL (X.REG xreg, X.REL (X.RSP, stackpos (temptonum temp)))] - else nil + + val stacksz = (nspilled + nsave) * 8 + fun stackpos (reg: int) = stacksz - (reg - maxreg + nsave) * 8 (* Stack position of some register number *) + + val prologue = + (X.SUB ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt stacksz), Tm.Quad))) :: + (ListPair.map + (fn (num, 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.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.ADD ((X.REG X.RSP, Tm.Quad), (X.CONST (Word32.fromInt stacksz), Tm.Quad))] + val endlbl = Label.new() + + 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'. *) + + 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 _ = 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.MOVL (dest, src)) = - if (isspilled dest) - then - unspill (src, spillreg1) @ - [ X.MOVL( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - else - [ X.MOVL( - realoper dest handle Spilled => raise ErrorMsg.InternalError "But we said that wasn't spilled?", - realoper src handle Spilled => stackoper src)] - | transform (X.SUBL (dest, src)) = - unspill (src, spillreg1) @ - [ X.SUBL( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] + | transform (X.LIVEIGN a) = transform a + | transform (X.MOV (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.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)) = + 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.ADDL (dest, src)) = (* You can have either operand spilled, but not both. Pick one. *) - if (isspilled dest) - then - unspill (src, spillreg1) @ - [ X.ADDL( - realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - else - [ X.ADDL( - realoper dest handle Spilled => raise ErrorMsg.InternalError "But we said that wasn't spilled?", - realoper src handle Spilled => stackoper src)] - | transform (X.IDIVL (src)) = [ X.IDIVL(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.NOTL (src)) = [ X.NOTL(realoper src handle Spilled => stackoper src)] - | transform (X.SALL (dest, shft)) = - [ X.SALL ( + | transform (X.NOT (src)) = [ X.NOT(realoper src handle Spilled => stackoper src)] + | transform (X.SAL (dest, shft)) = + [ X.SAL ( realoper dest handle Spilled => stackoper dest, shft)] - | transform (X.SARL (dest, shft)) = - [ X.SARL ( + | transform (X.SAR (dest, shft)) = + [ X.SAR ( realoper dest handle Spilled => stackoper dest, shft)] | transform (X.CLTD) = [ X.CLTD ] - | transform (X.ANDL (dest, src)) = + | transform (X.AND (dest, src)) = unspill (src, spillreg1) @ - [ X.ANDL( + [ X.AND( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - | transform (X.ORL (dest, src)) = + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] + | transform (X.OR (dest, src)) = unspill (src, spillreg1) @ - [ X.ORL( + [ X.OR( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - | transform (X.XORL (dest, src)) = + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] + | transform (X.XOR (dest, src)) = unspill (src, spillreg1) @ - [ X.XORL( + [ X.XOR( realoper dest handle Spilled => stackoper dest, - realoper src handle Spilled => X.REG spillreg1)] - | transform (X.CMPL (op1, op2)) = - unspill (op2, spillreg1) @ - [ X.CMPL( - realoper op1 handle Spilled => stackoper op1, - realoper op2 handle Spilled => X.REG spillreg1)] + realoper src handle Spilled => (X.REG spillreg1, X.osize src))] + | transform (X.CMP (op1, op2)) = + 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)] - | transform (X.SETNE (src)) = [ X.SETNE(realoper src handle Spilled => stackoper src)] - | transform (X.SETE (src)) = [ X.SETE(realoper src handle Spilled => stackoper src)] - | transform (X.SETLE (src)) = [ X.SETLE(realoper src handle Spilled => stackoper src)] - | transform (X.SETL (src)) = [ X.SETL(realoper src handle Spilled => stackoper src)] - | transform (X.SETGE (src)) = [ X.SETGE(realoper src handle Spilled => stackoper src)] - | transform (X.SETG (src)) = [ X.SETG(realoper src handle Spilled => stackoper src)] - | transform (X.MOVZBL (dest, src)) = - [ X.MOVZBL( - realoper dest 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, X.osize dest), realoper src handle Spilled => stackoper src)] @ spill (dest, spillreg1) - | transform (X.RET) = epilogue @ [X.RET] + | 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.JE l) = [ X.JE l] - | transform (X.JNE l) = [ X.JNE l] -(* | transform _ = raise ErrorMsg.InternalError ("Unimplemented transform")*) + | transform (X.Jcc (c,l)) = [X.Jcc (c,l)] + | transform _ = raise ErrorMsg.InternalError "probably movsc: unimplemented" in - List.concat (prologue :: (map transform instrs)) - + if (nsave < 2) then + List.concat (prologue :: (map transform instrs)) + else + List.concat (prologue :: ((map transform instrs) @ [[X.LABEL endlbl], epilogue, [X.RET]])) end end