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CodeGen.cs
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CodeGen.cs
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// This is the new CLR backend. The old one generated C# from Perl, which
// was slow and gave us the limitations of C#; this one aims to be faster.
// Also, by making the Perl code emit a portable format, it makes future
// portability work easier.
using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Collections.Generic;
using System.Collections;
using System.Text;
using System.IO;
using Niecza;
namespace Niecza.CLRBackend {
// The portable format is a subset of JSON, and is currently read
// into a matching internal form.
static class JScalar {
public static string[] SA(int cut, object x) {
object[] arr = (object[]) x;
string[] r = new string[ arr.Length - cut ];
for (int i = 0; i < r.Length; i++)
r[i] = S(arr[i+cut]);
return r;
}
public static int[] IA(int cut, object x) {
object[] arr = (object[]) x;
int[] r = new int[ arr.Length - cut ];
for (int i = 0; i < r.Length; i++)
r[i] = I(arr[i+cut]);
return r;
}
public static T[] A<T>(int cut, object x, Func<object, T> rdr) {
object[] arr = (object[]) x;
T[] r = new T[ arr.Length - cut ];
for (int i = 0; i < r.Length; i++)
r[i] = rdr(arr[i+cut]);
return r;
}
public static bool B(object x) {
string s = S(x);
if (s == "1") return true;
if (s == "0" || s == "") return false;
throw new ArgumentException(s);
}
public static int I(object x) { return (int)N(x); }
public static double N(object x) { return Utils.S2N((string)x); }
public static int IN(object x) { return x == null ? -1 : (int)N(x); }
public static string S(object x) { return x == null ? null : ((string)x); }
}
class Reader {
static char GetHexQuad(char[] s, int ix) {
int acc = 0;
for (int i = 0; i < 4; i++) {
acc <<= 4;
int ch = (int)s[ix+i];
acc += (ch>=(int)'a'&&ch<=(int)'f') ? (ch + 10 - (int)'a') :
(ch>=(int)'A'&&ch<=(int)'F') ? (ch + 10 - (int)'A') :
(ch - (int)'0');
}
return (char)acc;
}
public static object Read(string inputx, object[] refs) {
char[] input = inputx.ToCharArray();
int ilen = input.Length;
int start, write;
int ix = 0;
List<List<object>> containers = new List<List<object>>();
char i;
while (true) {
i = input[ix];
if (i == '\t' || i == ' ' || i == '\r' || i == '\n' ||
i == ',' || i == ':') {
ix++;
continue;
}
if (i == '[' || i == '{') {
containers.Add(new List<object>());
ix++;
continue;
}
if (i == ']' || i == '}') {
object[] r = containers[containers.Count - 1].ToArray();
containers.RemoveAt(containers.Count - 1);
if (containers.Count == 0) return r;
containers[containers.Count - 1].Add(r);
ix++;
continue;
}
if (i == 'n' && ilen >= ix + 4 &&
input[ix+1] == 'u' && input[ix+2] == 'l' &&
input[ix+3] == 'l') {
containers[containers.Count - 1].Add(null);
ix += 4;
continue;
}
if (i == '"') {
ix++;
start = ix;
write = ix;
while (true) {
i = input[ix];
if (i == '\\') {
switch (input[ix+1]) {
case '/': i = '/'; break;
case '\\': i = '\\'; break;
case '"': i = '"'; break;
case 't': i = '\t'; break;
case 'r': i = '\r'; break;
case 'n': i = '\n'; break;
case 'f': i = '\f'; break;
case 'b': i = '\b'; break;
case 'u': i = GetHexQuad(input, ix+2); ix += 4; break;
}
ix += 2;
input[write++] = i;
} else if (i == '"') {
break;
} else {
input[write++] = i;
ix++;
}
}
ix++;
containers[containers.Count - 1].Add(new string(input, start, write - start));
continue;
}
start = ix;
while (true) {
i = input[ix];
if (i == ',' || i == '\r' || i == '\t' || i == '\n' ||
i == ' ' || i == ']' || i == '}')
break;
ix++;
}
if (input[start] == '!') {
string str = new string(input, start+1, ix - start - 1);
containers[containers.Count - 1].Add(refs[int.Parse(str)]);
} else {
containers[containers.Count - 1].Add(new string(input, start, ix - start));
}
}
}
}
// Extra info needed beyond what ILGenerator alone provides. Note
// that switch generation is done in another pass.
class CgContext {
public ILGenerator il;
public TypeBuilder tb;
public int next_case;
public Label[] cases;
public int num_cases;
public Dictionary<string,int> named_cases
= new Dictionary<string,int>();
public Dictionary<string,Label> named_labels
= new Dictionary<string,Label>();
public string[] let_names = new string[0];
public Type[] let_types = new Type[0];
public LocalBuilder ospill, sspill, pspill, nspill;
public List<int> lineStack = new List<int>();
public List<int> lineBuffer = new List<int>();
public List<int> ehspanBuffer = new List<int>();
public List<string> ehlabelBuffer = new List<string>();
public List<LocalBuilder> scratches = new List<LocalBuilder>();
public void make_ospill() {
if (ospill == null)
ospill = il.DeclareLocal(Tokens.Variable);
}
public void make_sspill() {
if (sspill == null)
sspill = il.DeclareLocal(Tokens.Variable);
}
public void save_line() {
lineBuffer.Add(lineStack.Count == 0 ? 0 : lineStack[lineStack.Count - 1]);
}
public void EmitDataArray(Type ty, int ct, byte[] vec) {
EmitInt(ct);
// the mono JIT checks for this exact sequence
il.Emit(OpCodes.Newarr, ty);
if (vec.Length != 0) {
FieldBuilder fb = tb.DefineInitializedData(
"A" + (EmitUnit.Current.nextid++), vec, 0);
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Ldtoken, fb);
il.Emit(OpCodes.Call, typeof(System.Runtime.CompilerServices.RuntimeHelpers).GetMethod("InitializeArray"));
}
}
// logic stolen from mcs
public void EmitInt(int i) {
switch (i) {
case -1: il.Emit(OpCodes.Ldc_I4_M1); break;
case 0: il.Emit(OpCodes.Ldc_I4_0); break;
case 1: il.Emit(OpCodes.Ldc_I4_1); break;
case 2: il.Emit(OpCodes.Ldc_I4_2); break;
case 3: il.Emit(OpCodes.Ldc_I4_3); break;
case 4: il.Emit(OpCodes.Ldc_I4_4); break;
case 5: il.Emit(OpCodes.Ldc_I4_5); break;
case 6: il.Emit(OpCodes.Ldc_I4_6); break;
case 7: il.Emit(OpCodes.Ldc_I4_7); break;
case 8: il.Emit(OpCodes.Ldc_I4_8); break;
default:
if (i >= -128 && i < 127) {
il.Emit(OpCodes.Ldc_I4_S, (sbyte) i);
} else {
il.Emit(OpCodes.Ldc_I4, i);
}
break;
}
}
/* this too */
public void EmitLong(long l) {
if (l >= int.MinValue && l <= int.MaxValue) {
EmitInt((int)l);
il.Emit(OpCodes.Conv_I8);
} else if (l >= 0 && l <= uint.MaxValue) {
EmitInt((int)l);
il.Emit(OpCodes.Conv_U8);
} else {
il.Emit(OpCodes.Ldc_I8, l);
}
}
public void EmitPreSetlex(int ix) {
if (ix >= (Tokens.NumInt32 + Tokens.NumInline)) {
il.Emit(OpCodes.Ldfld, Tokens.Frame_lexn);
EmitInt(ix - (Tokens.NumInt32 + Tokens.NumInline));
}
}
public void EmitSetlex(int ix, Type t) {
if (ix >= Tokens.NumInt32 && t.IsValueType)
il.Emit(OpCodes.Box, t);
if (ix >= (Tokens.NumInt32 + Tokens.NumInline)) {
il.Emit(OpCodes.Stelem_Ref);
} else if (ix >= Tokens.NumInt32) {
il.Emit(OpCodes.Stfld,
Tokens.Frame_lexobj[ix - Tokens.NumInt32]);
} else {
il.Emit(OpCodes.Stfld, Tokens.Frame_lexi32[ix]);
}
}
public void EmitGetlex(int ix, Type t) {
if (ix >= (Tokens.NumInt32 + Tokens.NumInline)) {
il.Emit(OpCodes.Ldfld, Tokens.Frame_lexn);
EmitInt(ix - (Tokens.NumInt32 + Tokens.NumInline));
il.Emit(OpCodes.Ldelem_Ref);
} else if (ix >= Tokens.NumInt32) {
il.Emit(OpCodes.Ldfld,
Tokens.Frame_lexobj[ix - Tokens.NumInt32]);
} else {
il.Emit(OpCodes.Ldfld, Tokens.Frame_lexi32[ix]);
}
if (ix >= Tokens.NumInt32 &&
(Config.CGVerifiable || t.IsValueType)) {
il.Emit(OpCodes.Unbox_Any, t);
}
}
}
sealed class Tokens {
public static readonly Type Void = typeof(void);
public static readonly Type String = typeof(string);
public static readonly Type Boolean = typeof(bool);
public static readonly Type Int16 = typeof(short);
public static readonly Type Int32 = typeof(int);
public static readonly Type Int64 = typeof(long);
public static readonly Type UInt32 = typeof(uint);
public static readonly Type UInt64 = typeof(ulong);
public static readonly Type IntPtr = typeof(IntPtr);
public static readonly Type Double = typeof(double);
public static readonly Type Frame = typeof(Frame);
public static readonly Type Kernel = typeof(Kernel);
public static readonly Type Builtins = typeof(Builtins);
public static readonly Type SubInfo = typeof(SubInfo);
public static readonly Type P6any = typeof(P6any);
public static readonly Type Variable = typeof(Variable);
public static readonly Type P6opaque = typeof(P6opaque);
public static readonly Type DynBlockDelegate = typeof(DynBlockDelegate);
public static readonly Type STable = typeof(STable);
public static readonly Type VarHash = typeof(VarHash);
public static readonly Type VVarList = typeof(VarDeque);
public static readonly Type FVarList = typeof(Variable[]);
public static readonly Type Cursor = typeof(Cursor);
public static readonly Type RxFrame = typeof(RxFrame);
public static readonly Type CC = typeof(CC);
public static readonly Type LAD = typeof(LAD);
public static readonly Type RuntimeUnit = typeof(RuntimeUnit);
public static readonly Type StashCursor = typeof(StashCursor);
public static readonly ConstructorInfo SubInfo_ctor =
SubInfo.GetConstructor(new Type[] {
String, typeof(int[]), typeof(DynBlockDelegate),
SubInfo, LAD, typeof(int[]), typeof(string[]),
Int32, typeof(string[]), typeof(int[]) });
public static readonly ConstructorInfo DynBlockDelegate_ctor =
typeof(DynBlockDelegate).GetConstructor(new Type[] {
typeof(object), typeof(IntPtr) });
public static readonly ConstructorInfo P6opaque_ctor =
typeof(P6opaque).GetConstructor(new Type[] {
STable });
public static readonly ConstructorInfo DMO_ctor =
STable.GetConstructor(new Type[] { String });
public static readonly ConstructorInfo RxFrame_ctor =
RxFrame.GetConstructor(new Type[] { String, Cursor, Boolean });
public static readonly ConstructorInfo SV_ctor =
typeof(RWVariable).GetConstructor(new Type[] {
STable, typeof(ViviHook), P6any });
public static readonly ConstructorInfo SubViviHook_ctor =
typeof(SubViviHook).GetConstructor(new Type[] { P6any });
public static readonly ConstructorInfo HashViviHook_ctor =
typeof(HashViviHook).GetConstructor(new Type[] { P6any, String });
public static readonly ConstructorInfo ArrayViviHook_ctor =
typeof(ArrayViviHook).GetConstructor(new Type[] { P6any, Int32 });
public static readonly ConstructorInfo NewHashViviHook_ctor =
typeof(NewHashViviHook).GetConstructor(new Type[] { Variable, String });
public static readonly ConstructorInfo NewArrayViviHook_ctor =
typeof(NewArrayViviHook).GetConstructor(new Type[] { Variable, Int32 });
public static readonly ConstructorInfo Rat_ctor =
typeof(Rat).GetConstructor(new Type[] { typeof(BigInteger), typeof(ulong) });
public static readonly ConstructorInfo BigInteger_ctor =
typeof(BigInteger).GetConstructor(new Type[] { typeof(short), typeof(uint[]) });
public static readonly ConstructorInfo CC_ctor =
CC.GetConstructor(new Type[] { typeof(int[]) });
public static readonly ConstructorInfo SC_ctor =
StashCursor.GetConstructor(new Type[] { typeof(Frame), typeof(int) });
public static readonly MethodInfo P6any_InvokeMethod =
P6any.GetMethod("InvokeMethod");
public static readonly MethodInfo P6any_Invoke =
P6any.GetMethod("Invoke");
public static readonly MethodInfo P6any_SetSlot =
P6any.GetMethod("SetSlot", new Type[] { STable, String, typeof(object) });
public static readonly MethodInfo P6any_GetSlot =
P6any.GetMethod("GetSlot", new Type[] { STable, String });
public static readonly MethodInfo SubInfo_AddHint =
SubInfo.GetMethod("AddHint");
public static readonly MethodInfo Variable_Fetch =
Variable.GetMethod("Fetch");
public static readonly MethodInfo VVarList_Item =
VVarList.GetMethod("get_Item");
public static readonly MethodInfo VarHash_Remove =
VarHash.GetMethod("Remove");
public static readonly MethodInfo VarHash_get_Item =
VarHash.GetMethod("get_Item");
public static readonly MethodInfo VarHash_set_Item =
VarHash.GetMethod("set_Item");
public static readonly MethodInfo Kernel_MakeSub =
typeof(Kernel).GetMethod("MakeSub");
public static readonly MethodInfo Kernel_CheckUnsafe =
typeof(Kernel).GetMethod("CheckUnsafe");
public static readonly MethodInfo Kernel_NewLabelVar =
typeof(Kernel).GetMethod("NewLabelVar");
public static readonly MethodInfo Kernel_MakeDispatcher =
typeof(Kernel).GetMethod("MakeDispatcher");
public static readonly MethodInfo Kernel_Die =
typeof(Kernel).GetMethod("Die");
public static readonly MethodInfo Kernel_SFH =
typeof(Kernel).GetMethod("SearchForHandler");
public static readonly MethodInfo Kernel_BootModule =
typeof(Kernel).GetMethod("BootModule");
public static readonly MethodInfo Kernel_GetGlobal =
typeof(Kernel).GetMethod("GetGlobal");
public static readonly MethodInfo Kernel_BindGlobal =
typeof(Kernel).GetMethod("BindGlobal");
public static readonly MethodInfo Kernel_NewRWListVar =
typeof(Kernel).GetMethod("NewRWListVar");
public static readonly MethodInfo Kernel_NewRWScalar =
typeof(Kernel).GetMethod("NewRWScalar");
public static readonly MethodInfo Kernel_NewTypedScalar =
typeof(Kernel).GetMethod("NewTypedScalar");
public static readonly MethodInfo Kernel_Assign =
typeof(Kernel).GetMethod("Assign");
public static readonly MethodInfo Kernel_CreateArray =
typeof(Kernel).GetMethod("CreateArray");
public static readonly MethodInfo Kernel_CreateHash =
typeof(Kernel).GetMethod("CreateHash");
public static readonly MethodInfo Kernel_GetVar =
typeof(Kernel).GetMethod("GetVar");
public static readonly MethodInfo Kernel_Decontainerize =
typeof(Kernel).GetMethod("Decontainerize");
public static readonly MethodInfo Kernel_NewBoundVar =
typeof(Kernel).GetMethod("NewBoundVar");
public static readonly MethodInfo Kernel_IterHasFlat =
typeof(Kernel).GetMethod("IterHasFlat");
public static readonly MethodInfo Kernel_ContextHelper =
typeof(Kernel).GetMethod("ContextHelper");
public static readonly MethodInfo Kernel_StatusHelper =
typeof(Kernel).GetMethod("StatusHelper");
public static readonly MethodInfo Kernel_SetStatus =
typeof(Kernel).GetMethod("SetStatus");
public static readonly MethodInfo Kernel_SortHelper =
typeof(Kernel).GetMethod("SortHelper");
public static readonly MethodInfo Kernel_AddPhaser =
typeof(Kernel).GetMethod("AddPhaser");
public static readonly MethodInfo Kernel_FirePhasers =
typeof(Kernel).GetMethod("FirePhasers");
public static readonly MethodInfo Kernel_BoxAnyMO_Int32 =
typeof(Kernel).GetMethod("BoxAnyMO").MakeGenericMethod(typeof(int));
public static readonly MethodInfo Kernel_BoxAnyMO_Double =
typeof(Kernel).GetMethod("BoxAnyMO").MakeGenericMethod(typeof(double));
public static readonly MethodInfo Kernel_BoxAnyMO_Rat =
typeof(Kernel).GetMethod("BoxAnyMO").MakeGenericMethod(typeof(Rat));
public static readonly MethodInfo Kernel_BoxAnyMO_BigInteger =
typeof(Kernel).GetMethod("BoxAnyMO").MakeGenericMethod(typeof(BigInteger));
public static readonly MethodInfo Builtins_Make =
typeof(Builtins).GetMethod("Make");
public static readonly MethodInfo Builtins_MEMap =
typeof(Builtins).GetMethod("MEMap");
public static readonly MethodInfo Builtins_MEGrep =
typeof(Builtins).GetMethod("MEGrep");
public static readonly MethodInfo DMO_AddMethod =
typeof(STable).GetMethod("AddMethod");
public static readonly MethodInfo DMO_AddAttribute =
typeof(STable).GetMethod("AddAttribute");
public static readonly MethodInfo DMO_Invalidate =
typeof(STable).GetMethod("Invalidate");
public static readonly MethodInfo DMO_FillParametricRole =
typeof(STable).GetMethod("FillParametricRole");
public static readonly MethodInfo DMO_FillRole =
typeof(STable).GetMethod("FillRole");
public static readonly MethodInfo RxFrame_PushBacktrack =
typeof(RxFrame).GetMethod("PushBacktrack");
public static readonly MethodInfo RxFrame_PushCapture =
typeof(RxFrame).GetMethod("PushCapture");
public static readonly MethodInfo Console_WriteLine =
typeof(Console).GetMethod("WriteLine", new Type[] { typeof(string) });
public static readonly MethodInfo Console_Write =
typeof(Console).GetMethod("Write", new Type[] { typeof(string) });
public static readonly MethodInfo Environment_Exit =
typeof(Environment).GetMethod("Exit");
public static readonly MethodInfo StringBuilder_Append_String =
typeof(StringBuilder).GetMethod("Append", new Type[] { String });
public static readonly MethodInfo TW_WriteLine =
typeof(TextWriter).GetMethod("WriteLine", new Type[] { String });
public static readonly MethodInfo Console_get_Error =
typeof(Console).GetMethod("get_Error");
public static readonly MethodInfo Object_ToString =
typeof(object).GetMethod("ToString", new Type[0]);
public static readonly MethodInfo RU_LoadStrArray =
RuntimeUnit.GetMethod("LoadStrArray");
public static readonly MethodInfo RU_LoadPackage =
RuntimeUnit.GetMethod("LoadPackage");
public static readonly MethodInfo RU_LoadClassMembers =
RuntimeUnit.GetMethod("LoadClassMembers");
public static readonly MethodInfo RU_LoadSubInfo =
RuntimeUnit.GetMethod("LoadSubInfo");
public static readonly MethodInfo RU_LoadSignature =
RuntimeUnit.GetMethod("LoadSignature");
public static readonly MethodInfo RU_LoadLAD =
RuntimeUnit.GetMethod("LoadLAD");
public static readonly MethodInfo RU_LoadLADArr =
RuntimeUnit.GetMethod("LoadLADArr");
public static readonly MethodInfo Frame_Return =
Frame.GetMethod("Return");
public static readonly MethodInfo Frame_Binder =
Frame.GetMethod("Binder");
public static readonly FieldInfo P6any_mo =
P6any.GetField("mo");
public static readonly FieldInfo StashEnt_v =
typeof(StashEnt).GetField("v");
public static readonly FieldInfo SubInfo_protosub =
SubInfo.GetField("protosub");
public static readonly FieldInfo SubInfo_protopad =
SubInfo.GetField("protopad");
public static readonly FieldInfo SubInfo_mo =
SubInfo.GetField("mo");
public static readonly FieldInfo P6opaque_slots =
P6opaque.GetField("slots");
public static readonly FieldInfo DMO_typeObj =
STable.GetField("typeObj");
public static readonly FieldInfo DMO_initObj =
STable.GetField("initObj");
public static readonly FieldInfo DMO_how =
STable.GetField("how");
public static readonly FieldInfo Kernel_NumMO =
Kernel.GetField("NumMO");
public static readonly FieldInfo Kernel_IntMO =
Kernel.GetField("IntMO");
public static readonly FieldInfo Kernel_RatMO =
Kernel.GetField("RatMO");
public static readonly FieldInfo Kernel_StrMO =
Kernel.GetField("StrMO");
public static readonly FieldInfo Kernel_AnyMO =
Kernel.GetField("AnyMO");
public static readonly FieldInfo Kernel_ParcelMO =
Kernel.GetField("ParcelMO");
public static readonly FieldInfo Kernel_AnyP =
Kernel.GetField("AnyP");
public static readonly FieldInfo Frame_rx =
typeof(Frame).GetField("rx");
public static readonly FieldInfo Frame_ip =
typeof(Frame).GetField("ip");
public static readonly FieldInfo Frame_caller =
typeof(Frame).GetField("caller");
public static readonly FieldInfo Frame_outer =
typeof(Frame).GetField("outer");
public static readonly FieldInfo Frame_resultSlot =
typeof(Frame).GetField("resultSlot");
public static readonly FieldInfo Frame_lexn =
typeof(Frame).GetField("lexn");
[Immutable]
public static readonly FieldInfo[] Frame_lexi32 = new FieldInfo[] {
typeof(Frame).GetField("lexi0"),
typeof(Frame).GetField("lexi1")
};
[Immutable]
public static readonly FieldInfo[] Frame_lexobj = new FieldInfo[] {
typeof(Frame).GetField("lex0"),
typeof(Frame).GetField("lex1"),
typeof(Frame).GetField("lex2"),
typeof(Frame).GetField("lex3"),
typeof(Frame).GetField("lex4"),
typeof(Frame).GetField("lex5"),
typeof(Frame).GetField("lex6"),
typeof(Frame).GetField("lex7"),
typeof(Frame).GetField("lex8"),
typeof(Frame).GetField("lex9")
};
public static readonly FieldInfo RU_xref = RuntimeUnit.GetField("xref");
public const int NumInt32 = 2;
public const int NumInline = 10;
// other random stuff
public static readonly ClrOp[] EmptyClrOp = new ClrOp[0];
}
// This are expressional CLR operators. This is lower level than the
// CPS stuff; if HasCases is true, Returns must be void. Thus,
// there is no need to handle argument spills.
abstract class ClrOp {
public bool HasCases;
public bool Constant; // if this returns a value, can it be reordered?
public Type Returns;
public abstract void CodeGen(CgContext cx);
public virtual void ListCases(CgContext cx) { }
public virtual ClrOp Sink() {
throw (Returns == Tokens.Void)
? (Exception)new ArgumentException()
: new NotImplementedException();
}
protected static void TypeCheck(Type sub, Type super) {
if (!super.IsAssignableFrom(sub))
throw new Exception(sub + " not subtype of " + super);
}
protected static void TypeCheck(Type sub, Type super, object c) {
if (!super.IsAssignableFrom(sub))
throw new Exception(sub + " not subtype of " + super + ": " + c);
}
}
// NOT FOR GENERAL USE: only in implementing Sink for Clr*** with
// irreducable operations
class ClrSink : ClrOp {
public readonly ClrOp zyg;
public override void ListCases(CgContext cx) {
zyg.ListCases(cx);
}
public override void CodeGen(CgContext cx) {
zyg.CodeGen(cx);
cx.il.Emit(OpCodes.Pop);
}
public ClrSink(ClrOp zyg) {
if (zyg.Returns == Tokens.Void)
throw new ArgumentException();
this.zyg = zyg;
Returns = Tokens.Void;
}
}
class ClrMethodCall : ClrOp {
public readonly MethodInfo Method;
public readonly ClrOp[] Zyg;
public override ClrOp Sink() {
return new ClrSink(this);
}
public override void CodeGen(CgContext cx) {
if (HasCases) {
cx.il.Emit(OpCodes.Ldarg_0);
cx.EmitInt(cx.next_case);
cx.il.Emit(OpCodes.Stfld, Tokens.Frame_ip);
}
int scratch_ix = -1;
LocalBuilder scratch_lb = null;
int i = 0;
if (!Method.IsStatic) {
ClrOp o = Zyg[i++];
o.CodeGen(cx);
if (o.Returns.IsValueType) {
if (Method.DeclaringType == o.Returns) {
scratch_ix = 0;
while (scratch_ix < cx.scratches.Count &&
cx.scratches[scratch_ix].LocalType != o.Returns)
scratch_ix++;
if (scratch_ix == cx.scratches.Count)
cx.scratches.Add(cx.il.DeclareLocal(o.Returns));
scratch_lb = cx.scratches[scratch_ix];
cx.scratches[scratch_ix] = null;
cx.il.Emit(OpCodes.Stloc, scratch_lb);
cx.il.Emit(OpCodes.Ldloca, scratch_lb);
}
else
cx.il.Emit(OpCodes.Box, o.Returns);
}
}
// this needs to come AFTER the invocant
if (HasCases)
cx.il.Emit(OpCodes.Ldarg_0);
for (; i < Zyg.Length; i++) {
Zyg[i].CodeGen(cx);
}
cx.il.Emit(((Method.IsStatic || !Method.IsVirtual) ?
OpCodes.Call : OpCodes.Callvirt), Method);
if (HasCases) {
cx.il.Emit(OpCodes.Ret);
cx.il.MarkLabel(cx.cases[cx.next_case++]);
cx.save_line();
}
if (scratch_ix >= 0)
cx.scratches[scratch_ix] = scratch_lb;
}
public override void ListCases(CgContext cx) {
// it is not legal for any of out children to have cases to list
if (HasCases)
cx.num_cases++;
}
public ClrMethodCall(bool cps, MethodInfo mi, params ClrOp[] zyg) {
Method = mi;
Zyg = zyg;
Returns = cps ? Tokens.Void : mi.ReturnType;
HasCases = cps;
List<Type> ts = new List<Type>();
if (!mi.IsStatic)
ts.Add(mi.DeclaringType);
if (cps && mi.GetParameters()[0].ParameterType != Tokens.Frame)
throw new ArgumentException("CPS method not taking a frame");
if (cps && mi.ReturnType != Tokens.Frame)
throw new ArgumentException("CPS method not returning a frame");
bool skip = cps;
foreach (ParameterInfo pi in mi.GetParameters()) {
if (skip) { skip = false; continue; }
ts.Add(pi.ParameterType);
}
if (zyg.Length != ts.Count)
throw new Exception("argument list length mismatch for " + mi +
" got " + zyg.Length + " need " + ts.Count);
for (int i = 0; i < ts.Count; i++) {
TypeCheck(zyg[i].Returns, ts[i], mi);
}
}
}
class ClrConstructorCall : ClrOp {
public readonly ConstructorInfo Method;
public readonly ClrOp[] Zyg;
public override ClrOp Sink() {
return new ClrSink(this);
}
public override void CodeGen(CgContext cx) {
foreach (ClrOp o in Zyg) {
o.CodeGen(cx);
}
cx.il.Emit(OpCodes.Newobj, Method);
}
public ClrConstructorCall(ConstructorInfo mi, ClrOp[] zyg) {
Method = mi;
Zyg = zyg;
Returns = mi.DeclaringType;
List<Type> ts = new List<Type>();
foreach (ParameterInfo pi in mi.GetParameters()) {
ts.Add(pi.ParameterType);
}
if (zyg.Length != ts.Count)
throw new Exception("argument list length mismatch");
for (int i = 0; i < ts.Count; i++) {
TypeCheck(zyg[i].Returns, ts[i], mi);
}
}
}
class ClrContexty : ClrOp {
public readonly ClrOp[] zyg;
public readonly MethodInfo inv;
public readonly FieldInfo thing;
// This could be avoided in some cases, but probably +$customobj;
// shouldn't be optimized out
public override ClrOp Sink() {
return new ClrSink(this);
}
public override void CodeGen(CgContext cx) {
zyg[0].CodeGen(cx);
cx.make_ospill();
cx.il.Emit(OpCodes.Dup);
cx.il.Emit(OpCodes.Stloc, cx.ospill);
cx.il.Emit(OpCodes.Callvirt, Tokens.Variable_Fetch);
cx.il.Emit(OpCodes.Ldfld, Tokens.P6any_mo);
cx.il.Emit(OpCodes.Ldfld, thing);
cx.il.Emit(OpCodes.Ldloc, cx.ospill);
for (int i = 1; i < zyg.Length; i++)
zyg[i].CodeGen(cx);
cx.il.Emit(OpCodes.Callvirt, inv);
}
public ClrContexty(FieldInfo thing, MethodInfo inv, ClrOp[] zyg) {
this.thing = thing;
this.inv = inv;
this.zyg = zyg;
Returns = inv.ReturnType;
}
}
class ClrOperator : ClrOp {
public readonly OpCode op;
public readonly ClrOp[] zyg;
public override ClrOp Sink() {
ClrOp[] szyg = new ClrOp[zyg.Length];
for (int i = 0; i < szyg.Length; i++)
szyg[i] = zyg[i].Sink();
return new ClrSeq(szyg);
}
public override void CodeGen(CgContext cx) {
foreach (ClrOp c in zyg)
c.CodeGen(cx);
cx.il.Emit(op);
}
public ClrOperator(Type ret, OpCode op, ClrOp[] zyg) {
Returns = ret;
this.op = op;
this.zyg = zyg;
}
}
class ClrCompare : ClrOp {
public readonly string op;
public readonly ClrOp[] zyg;
public override ClrOp Sink() {
ClrOp[] szyg = new ClrOp[zyg.Length];
for (int i = 0; i < szyg.Length; i++)
szyg[i] = zyg[i].Sink();
return new ClrSeq(szyg);
}
public override void CodeGen(CgContext cx) {
foreach (ClrOp c in zyg)
c.CodeGen(cx);
bool flt = zyg[0].Returns == Tokens.Double;
OpCode ilop;
bool not = false;
if (op == "<") { ilop = OpCodes.Clt; }
else if (op == ">") { ilop = OpCodes.Cgt; }
else if (op == ">=") {
ilop = flt ? OpCodes.Clt_Un : OpCodes.Clt;
not = true;
}
else if (op == "<=") {
ilop = flt ? OpCodes.Cgt_Un : OpCodes.Cgt;
not = true;
}
else if (op == "==") { ilop = OpCodes.Ceq; }
else if (op == "!=") { ilop = OpCodes.Ceq; not = true; }
else throw new ArgumentException(op + " as polyop");
cx.il.Emit(ilop);
if (not) {
cx.il.Emit(OpCodes.Ldc_I4_0);
cx.il.Emit(OpCodes.Ceq);
}
}
public ClrCompare(string op, ClrOp[] zyg) {
Returns = Tokens.Boolean;
this.op = op;
this.zyg = zyg;
}
}
class ClrGetField : ClrOp {
public readonly FieldInfo f;
public readonly ClrOp zyg;
// Not strictly right, but Perl 6 code never sees CLR nulls, and
// this is a major win for some cases
public override ClrOp Sink() {
return zyg.Sink();
}
public override void CodeGen(CgContext cx) {
zyg.CodeGen(cx);
cx.il.Emit(OpCodes.Ldfld, f);
}
public ClrGetField(FieldInfo f, ClrOp zyg) {
TypeCheck(zyg.Returns, f.DeclaringType);
Returns = f.FieldType;
this.f = f;
this.zyg = zyg;
}
}
class ClrSetField : ClrOp {
public readonly FieldInfo f;
public readonly ClrOp zyg1;
public readonly ClrOp zyg2;
public override void CodeGen(CgContext cx) {
zyg1.CodeGen(cx);
zyg2.CodeGen(cx);
cx.il.Emit(OpCodes.Stfld, f);
}
public ClrSetField(FieldInfo f, ClrOp zyg1, ClrOp zyg2) {
TypeCheck(zyg1.Returns, f.DeclaringType);
TypeCheck(zyg2.Returns, f.FieldType);
Returns = Tokens.Void;
this.f = f;
this.zyg1 = zyg1;
this.zyg2 = zyg2;
}
}
class ClrGetSField : ClrOp {
public readonly FieldInfo f;
public override ClrOp Sink() { return ClrNoop.Instance; }
public override void CodeGen(CgContext cx) {
cx.il.Emit(OpCodes.Ldsfld, f);
}
public ClrGetSField(FieldInfo f) {
Returns = f.FieldType;
this.f = f;
}
}
class ClrSetSField : ClrOp {
public readonly FieldInfo f;
public readonly ClrOp zyg;
public override void CodeGen(CgContext cx) {
zyg.CodeGen(cx);
cx.il.Emit(OpCodes.Stsfld, f);
}
public ClrSetSField(FieldInfo f, ClrOp zyg) {
TypeCheck(zyg.Returns, f.FieldType);
Returns = Tokens.Void;
this.f = f;
this.zyg = zyg;
}
}
class ClrPadGet : ClrOp {
public readonly int up;
public readonly int index;
public override ClrOp Sink() { return ClrNoop.Instance; }
public override void CodeGen(CgContext cx) {
cx.il.Emit(OpCodes.Ldarg_0);
for (int i = 0; i < up; i++)
cx.il.Emit(OpCodes.Ldfld, Tokens.Frame_outer);
cx.EmitGetlex(index + Tokens.NumInt32, Tokens.Variable);
}
public ClrPadGet(int up, int index) {
Returns = Tokens.Variable;
this.up = up;
this.index = index;
}
}
class ClrPadSet : ClrOp {
public readonly int up;
public readonly int index;
public readonly ClrOp zyg;
public override void CodeGen(CgContext cx) {
cx.il.Emit(OpCodes.Ldarg_0);
for (int i = 0; i < up; i++)
cx.il.Emit(OpCodes.Ldfld, Tokens.Frame_outer);
cx.EmitPreSetlex(index + Tokens.NumInt32);
zyg.CodeGen(cx);
cx.EmitSetlex(index + Tokens.NumInt32, Tokens.Variable);
}
public ClrPadSet(int up, int index, ClrOp zyg) {
Returns = Tokens.Void;
this.zyg = zyg;
this.up = up;
this.index = index;
}
}
class ClrProtoSet : ClrOp {
public readonly int ix;
public readonly ClrOp zyg1;
public readonly ClrOp zyg2;
public override void CodeGen(CgContext cx) {
zyg1.CodeGen(cx);
cx.EmitPreSetlex(ix + Tokens.NumInt32);
zyg2.CodeGen(cx);
cx.EmitSetlex(ix + Tokens.NumInt32, Tokens.Variable);
}
public ClrProtoSet(int ix, ClrOp zyg1, ClrOp zyg2) {
TypeCheck(zyg1.Returns, Tokens.Frame);
Returns = Tokens.Void;
this.ix = ix;
this.zyg1 = zyg1;
this.zyg2 = zyg2;
}
}
class ClrProtoGet : ClrOp {
public readonly int ix;
public readonly ClrOp zyg;
public override ClrOp Sink() { return ClrNoop.Instance; }
public override void CodeGen(CgContext cx) {
zyg.CodeGen(cx);
cx.EmitGetlex(ix + Tokens.NumInt32, Tokens.Variable);
}
public ClrProtoGet(int ix, ClrOp zyg) {
TypeCheck(zyg.Returns, Tokens.Frame);
Returns = Tokens.Variable;
this.ix = ix;
this.zyg = zyg;
}
}
class ClrMarkConstant : ClrOp {
readonly ClrOp real;
public ClrMarkConstant(ClrOp real) {
this.real = real;
Returns = real.Returns;
HasCases = false;
Constant = true;
}
// no side effects, huh?
public override ClrOp Sink() {
return ClrNoop.Instance;
}
public override void CodeGen(CgContext cx) {
real.CodeGen(cx);
}
}
class ClrNoop : ClrOp {
private ClrNoop() {
Returns = Tokens.Void;
HasCases = false;
}
public override void CodeGen(CgContext cx) { }
[Immutable] public static ClrNoop Instance = new ClrNoop();
}
class ClrEhSpan : ClrOp {
public readonly int kls;
public readonly string tag;
public readonly string ls;
public readonly string le;
public readonly int ng;
public readonly string lg;