--- a/solution/cw5/fun_llvm.sc Fri Oct 28 09:08:13 2022 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,412 +0,0 @@
-// A Small LLVM Compiler for a Simple Functional Language
-// (includes an external lexer and parser)
-//
-//
-// call with -- prints out llvm code
-//
-// amm fun_llvm.sc main fact.fun
-// amm fun_llvm.sc main defs.fun
-//
-// or -- writes llvm code to disk
-//
-// amm fun_llvm.sc write fact.fun
-// amm fun_llvm.sc write defs.fun
-//
-// this will generate an .ll file.
-//
-// or -- runs the generated llvm code via lli
-//
-// amm fun_llvm.sc run fact.fun
-// amm fun_llvm.sc run defs.fun
-//
-//
-// You can interpret an .ll file using lli, for example
-//
-// lli fact.ll
-//
-// The optimiser can be invoked as
-//
-// opt -O1 -S in_file.ll > out_file.ll
-// opt -O3 -S in_file.ll > out_file.ll
-//
-// The code produced for the various architectures can be obtain with
-//
-// llc -march=x86 -filetype=asm in_file.ll -o -
-// llc -march=arm -filetype=asm in_file.ll -o -
-//
-// Producing an executable can be achieved by
-//
-// llc -filetype=obj in_file.ll
-// gcc in_file.o -o a.out
-// ./a.out
-
-
-import $file.fun_tokens, fun_tokens._
-import $file.fun_parser, fun_parser._
-
-
-// for generating new labels
-var counter = -1
-
-def Fresh(x: String) = {
- counter += 1
- x ++ "_" ++ counter.toString()
-}
-
-// Internal CPS language for FUN
-abstract class KExp
-abstract class KVal
-
-type Ty = String
-type TyEnv = Map[String, Ty]
-
-case class KVar(s: String, ty: Ty = "UNDEF") extends KVal
-case class KLoad(v: KVal) extends KVal
-case class KNum(i: Int) extends KVal
-case class KFNum(i: Double) extends KVal
-case class KChr(c: Int) extends KVal
-case class Kop(o: String, v1: KVal, v2: KVal, ty: Ty = "UNDEF") extends KVal
-case class KCall(o: String, vrs: List[KVal], ty: Ty = "UNDEF") extends KVal
-
-case class KIf(x1: String, e1: KExp, e2: KExp) extends KExp {
- override def toString = s"KIf $x1\nIF\n$e1\nELSE\n$e2"
-}
-case class KLet(x: String, e1: KVal, e2: KExp) extends KExp {
- override def toString = s"let $x = $e1 in \n$e2"
-}
-case class KReturn(v: KVal) extends KExp
-
-// typing K values
-def typ_val(v: KVal, ts: TyEnv) : (KVal, Ty) = v match {
- case KVar(s, _) => {
- val ty = ts.getOrElse(s, "TUNDEF")
- (KVar(s, ty), ty)
- }
- case Kop(op, v1, v2, _) => {
- val (tv1, ty1) = typ_val(v1, ts)
- val (tv2, ty2) = typ_val(v2, ts)
- if (ty1 == ty2) (Kop(op, tv1, tv2, ty1), ty1) else (Kop(op, tv1, tv2, "TMISMATCH"), "TMISMATCH")
- }
- case KCall(fname, args, _) => {
- val ty = ts.getOrElse(fname, "TCALLUNDEF" ++ fname)
- (KCall(fname, args.map(typ_val(_, ts)._1), ty), ty)
- }
- case KLoad(v) => {
- val (tv, ty) = typ_val(v, ts)
- (KLoad(tv), ty)
- }
- case KNum(i) => (KNum(i), "Int")
- case KFNum(i) => (KFNum(i), "Double")
- case KChr(c) => (KChr(c), "Int")
-}
-
-def typ_exp(a: KExp, ts: TyEnv) : KExp = a match {
- case KReturn(v) => KReturn(typ_val(v, ts)._1)
- case KLet(x: String, v: KVal, e: KExp) => {
- val (tv, ty) = typ_val(v, ts)
- KLet(x, tv, typ_exp(e, ts + (x -> ty)))
- }
- case KIf(b, e1, e2) => KIf(b, typ_exp(e1, ts), typ_exp(e2, ts))
-}
-
-
-
-
-// CPS translation from Exps to KExps using a
-// continuation k.
-def CPS(e: Exp)(k: KVal => KExp) : KExp = e match {
- case Var(s) if (s.head.isUpper) => {
- val z = Fresh("tmp")
- KLet(z, KLoad(KVar(s)), k(KVar(z)))
- }
- case Var(s) => k(KVar(s))
- case Num(i) => k(KNum(i))
- case ChConst(c) => k(KChr(c))
- case FNum(i) => k(KFNum(i))
- case Aop(o, e1, e2) => {
- val z = Fresh("tmp")
- CPS(e1)(y1 =>
- CPS(e2)(y2 => KLet(z, Kop(o, y1, y2), k(KVar(z)))))
- }
- case If(Bop(o, b1, b2), e1, e2) => {
- val z = Fresh("tmp")
- CPS(b1)(y1 =>
- CPS(b2)(y2 =>
- KLet(z, Kop(o, y1, y2), KIf(z, CPS(e1)(k), CPS(e2)(k)))))
- }
- case Call(name, args) => {
- def aux(args: List[Exp], vs: List[KVal]) : KExp = args match {
- case Nil => {
- val z = Fresh("tmp")
- KLet(z, KCall(name, vs), k(KVar(z)))
- }
- case e::es => CPS(e)(y => aux(es, vs ::: List(y)))
- }
- aux(args, Nil)
- }
- case Sequence(e1, e2) =>
- CPS(e1)(_ => CPS(e2)(y2 => k(y2)))
-}
-
-//initial continuation
-def CPSi(e: Exp) = CPS(e)(KReturn)
-
-// some testcases
-val e1 = Aop("*", Var("a"), Num(3))
-CPSi(e1)
-
-val e2 = Aop("+", Aop("*", Var("a"), Num(3)), Num(4))
-CPSi(e2)
-
-val e3 = Aop("+", Num(2), Aop("*", Var("a"), Num(3)))
-CPSi(e3)
-
-val e4 = Aop("+", Aop("-", Num(1), Num(2)), Aop("*", Var("a"), Num(3)))
-CPSi(e4)
-
-val e5 = If(Bop("==", Num(1), Num(1)), Num(3), Num(4))
-CPSi(e5)
-
-val e6 = If(Bop("!=", Num(10), Num(10)), e5, Num(40))
-CPSi(e6)
-
-val e7 = Call("foo", List(Num(3)))
-CPSi(e7)
-
-val e8 = Call("foo", List(Aop("*", Num(3), Num(1)), Num(4), Aop("+", Num(5), Num(6))))
-CPSi(e8)
-
-val e9 = Sequence(Aop("*", Var("a"), Num(3)), Aop("+", Var("b"), Num(6)))
-CPSi(e9)
-
-val e = Aop("*", Aop("+", Num(1), Call("foo", List(Var("a"), Num(3)))), Num(4))
-CPSi(e)
-
-
-
-
-// convenient string interpolations
-// for instructions, labels and methods
-import scala.language.implicitConversions
-import scala.language.reflectiveCalls
-
-
-
-
-implicit def sring_inters(sc: StringContext) = new {
- def i(args: Any*): String = " " ++ sc.s(args:_*) ++ "\n"
- def l(args: Any*): String = sc.s(args:_*) ++ ":\n"
- def m(args: Any*): String = sc.s(args:_*) ++ "\n"
-}
-
-def get_ty(s: String) = s match {
- case "Double" => "double"
- case "Void" => "void"
- case "Int" => "i32"
- case "Bool" => "i2"
- case _ => s
-}
-
-def compile_call_arg(a: KVal) = a match {
- case KNum(i) => s"i32 $i"
- case KFNum(i) => s"double $i"
- case KChr(c) => s"i32 $c"
- case KVar(s, ty) => s"${get_ty(ty)} %$s"
-}
-
-def compile_arg(s: (String, String)) = s"${get_ty(s._2)} %${s._1}"
-
-
-// mathematical and boolean operations
-def compile_op(op: String) = op match {
- case "+" => "add i32 "
- case "*" => "mul i32 "
- case "-" => "sub i32 "
- case "/" => "sdiv i32 "
- case "%" => "srem i32 "
- case "==" => "icmp eq i32 "
- case "!=" => "icmp ne i32 " // not equal
- case "<=" => "icmp sle i32 " // signed less or equal
- case "<" => "icmp slt i32 " // signed less than
-}
-
-def compile_dop(op: String) = op match {
- case "+" => "fadd double "
- case "*" => "fmul double "
- case "-" => "fsub double "
- case "==" => "fcmp oeq double "
- case "<=" => "fcmp ole double "
- case "<" => "fcmp olt double "
-}
-
-// compile K values
-def compile_val(v: KVal) : String = v match {
- case KNum(i) => s"$i"
- case KFNum(i) => s"$i"
- case KChr(c) => s"$c"
- case KVar(s, ty) => s"%$s"
- case KLoad(KVar(s, ty)) => s"load ${get_ty(ty)}, ${get_ty(ty)}* @$s"
- case Kop(op, x1, x2, ty) => ty match {
- case "Int" => s"${compile_op(op)} ${compile_val(x1)}, ${compile_val(x2)}"
- case "Double" => s"${compile_dop(op)} ${compile_val(x1)}, ${compile_val(x2)}"
- case _ => Kop(op, x1, x2, ty).toString
- }
- case KCall(fname, args, ty) =>
- s"call ${get_ty(ty)} @$fname (${args.map(compile_call_arg).mkString(", ")})"
-}
-
-// compile K expressions
-def compile_exp(a: KExp) : String = a match {
- case KReturn(KVar("void", _)) =>
- i"ret void"
- case KReturn(KVar(x, ty)) =>
- i"ret ${get_ty(ty)} %$x"
- case KReturn(KNum(i)) =>
- i"ret i32 $i"
- case KLet(x: String, KCall(o: String, vrs: List[KVal], "Void"), e: KExp) =>
- i"${compile_val(KCall(o: String, vrs: List[KVal], "Void"))}" ++ compile_exp(e)
- case KLet(x: String, v: KVal, e: KExp) =>
- i"%$x = ${compile_val(v)}" ++ compile_exp(e)
- case KIf(x, e1, e2) => {
- val if_br = Fresh("if_branch")
- val else_br = Fresh("else_branch")
- i"br i1 %$x, label %$if_br, label %$else_br" ++
- l"\n$if_br" ++
- compile_exp(e1) ++
- l"\n$else_br" ++
- compile_exp(e2)
- }
-}
-
-
-val prelude = """
-declare i32 @printf(i8*, ...)
-
-@.str_nl = private constant [2 x i8] c"\0A\00"
-@.str_star = private constant [2 x i8] c"*\00"
-@.str_space = private constant [2 x i8] c" \00"
-
-define void @new_line() #0 {
- %t0 = getelementptr [2 x i8], [2 x i8]* @.str_nl, i32 0, i32 0
- %1 = call i32 (i8*, ...) @printf(i8* %t0)
- ret void
-}
-
-define void @print_star() #0 {
- %t0 = getelementptr [2 x i8], [2 x i8]* @.str_star, i32 0, i32 0
- %1 = call i32 (i8*, ...) @printf(i8* %t0)
- ret void
-}
-
-define void @print_space() #0 {
- %t0 = getelementptr [2 x i8], [2 x i8]* @.str_space, i32 0, i32 0
- %1 = call i32 (i8*, ...) @printf(i8* %t0)
- ret void
-}
-
-define void @skip() #0 {
- ret void
-}
-
-@.str_int = private constant [3 x i8] c"%d\00"
-
-define void @print_int(i32 %x) {
- %t0 = getelementptr [3 x i8], [3 x i8]* @.str_int, i32 0, i32 0
- call i32 (i8*, ...) @printf(i8* %t0, i32 %x)
- ret void
-}
-
-@.str_char = private constant [3 x i8] c"%c\00"
-
-define void @print_char(i32 %x) {
- %t0 = getelementptr [3 x i8], [3 x i8]* @.str_char, i32 0, i32 0
- call i32 (i8*, ...) @printf(i8* %t0, i32 %x)
- ret void
-}
-
-; END OF BUILD-IN FUNCTIONS (prelude)
-
-"""
-
-def get_cont(ty: Ty) = ty match {
- case "Int" => KReturn
- case "Double" => KReturn
- case "Void" => { (_: KVal) => KReturn(KVar("void", "Void")) }
-}
-
-// compile function for declarations and main
-def compile_decl(d: Decl, ts: TyEnv) : (String, TyEnv) = d match {
- case Def(name, args, ty, body) => {
- val ts2 = ts + (name -> ty)
- val tkbody = typ_exp(CPS(body)(get_cont(ty)), ts2 ++ args.toMap)
- (m"define ${get_ty(ty)} @$name (${args.map(compile_arg).mkString(",")}) {" ++
- compile_exp(tkbody) ++
- m"}\n", ts2)
- }
- case Main(body) => {
- val tbody = typ_exp(CPS(body)(_ => KReturn(KNum(0))), ts)
- (m"define i32 @main() {" ++
- compile_exp(tbody) ++
- m"}\n", ts)
- }
- case Const(name, n) => {
- (m"@$name = global i32 $n\n", ts + (name -> "Int"))
- }
- case FConst(name, x) => {
- (m"@$name = global double $x\n", ts + (name -> "Double"))
- }
-}
-
-def compile_prog(prog: List[Decl], ty: TyEnv) : String = prog match {
- case Nil => ""
- case d::ds => {
- val (s2, ty2) = compile_decl(d, ty)
- s2 ++ compile_prog(ds, ty2)
- }
-}
-// main compiler functions
-def compile(prog: List[Decl]) : String =
- prelude ++ compile_prog(prog, Map("new_line" -> "Void", "skip" -> "Void",
- "print_star" -> "Void", "print_space" -> "Void",
- "print_int" -> "Void", "print_char" -> "Void"))
-
-
-//import ammonite.ops._
-
-
-@main
-def main(fname: String) = {
- val path = os.pwd / fname
- val file = fname.stripSuffix("." ++ path.ext)
- val tks = tokenise(os.read(path))
- val ast = parse_tks(tks)
- val code = compile(ast)
- println(code)
-}
-
-@main
-def write(fname: String) = {
- val path = os.pwd / fname
- val file = fname.stripSuffix("." ++ path.ext)
- val tks = tokenise(os.read(path))
- val ast = parse_tks(tks)
- val code = compile(ast)
- //println(code)
- os.write.over(os.pwd / (file ++ ".ll"), code)
-}
-
-@main
-def run(fname: String) = {
- val path = os.pwd / fname
- val file = fname.stripSuffix("." ++ path.ext)
- write(fname)
- os.proc("llc", "-filetype=obj", file ++ ".ll").call()
- os.proc("gcc", file ++ ".o", "-o", file ++ ".bin").call()
- os.proc(os.pwd / (file ++ ".bin")).call(stdout = os.Inherit)
- println(s"done.")
-}
-
-
-
-
-