private void EmitIfStatementNode(AssociativeNode node, ref ProtoCore.Type inferedType, ProtoCore.AssociativeGraph.GraphNode graphNode = null)
{
int bp = (int)ProtoCore.DSASM.Constants.kInvalidIndex;
int L1 = (int)ProtoCore.DSASM.Constants.kInvalidIndex;
// If-expr
IfStatementNode ifnode = node as IfStatementNode;
DfsTraverse(ifnode.ifExprNode, ref inferedType, false, graphNode);
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
bp = pc;
EmitCJmp(L1);
// Create a new codeblock for this block
// Set the current codeblock as the parent of the new codeblock
// Set the new codeblock as a new child of the current codeblock
// Set the new codeblock as the current codeblock
ProtoCore.DSASM.CodeBlock localCodeBlock = new ProtoCore.DSASM.CodeBlock(
context.guid,
ProtoCore.DSASM.CodeBlockType.kConstruct,
Language.NotSpecified,
core.CodeBlockIndex++,
new ProtoCore.DSASM.SymbolTable(GetConstructBlockName("if"), core.RuntimeTableIndex++),
null,
false,
core);
localCodeBlock.instrStream = codeBlock.instrStream;
localCodeBlock.parent = codeBlock;
codeBlock.children.Add(localCodeBlock);
codeBlock = localCodeBlock;
// If-body
foreach (AssociativeNode ifBody in ifnode.IfBody)
{
inferedType = new ProtoCore.Type();
inferedType.UID = (int)PrimitiveType.kTypeVar;
DfsTraverse(ifBody, ref inferedType, false, graphNode);
}
// Restore - Set the local codeblock parent to be the current codeblock
codeBlock = localCodeBlock.parent;
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
BackpatchTable backpatchTable = new BackpatchTable();
backpatchTable.Append(pc, L1);
EmitJmp(L1);
// Backpatch the L2 destination of the if block
Backpatch(bp, pc);
/*
else if(E) -> traverse E
L1 = pc + 1
L2 = null
bp = pc
emit(jmp, _cx, L1, L2)
{
S -> traverse S
L1 = null
bpTable.append(pc)
emit(jmp,labelEnd)
backpatch(bp,pc)
}
* */
// Elseif-expr
/*
else
{
S -> traverse S
L1 = null
bpTable.append(pc)
emit(jmp,labelEnd)
backpatch(bp,pc)
}
* */
// Else-body
Validity.Assert(null != ifnode.ElseBody);
if (0 != ifnode.ElseBody.Count)
{
// Create a new symboltable for this block
// Set the current table as the parent of the new table
// Set the new table as a new child of the current table
// Set the new table as the current table
// Create a new codeblock for this block
// Set the current codeblock as the parent of the new codeblock
// Set the new codeblock as a new child of the current codeblock
// Set the new codeblock as the current codeblock
localCodeBlock = new ProtoCore.DSASM.CodeBlock(
context.guid,
ProtoCore.DSASM.CodeBlockType.kConstruct,
Language.NotSpecified,
core.CodeBlockIndex++,
new ProtoCore.DSASM.SymbolTable(GetConstructBlockName("else"), core.RuntimeTableIndex++),
null,
false,
core);
localCodeBlock.instrStream = codeBlock.instrStream;
localCodeBlock.parent = codeBlock;
codeBlock.children.Add(localCodeBlock);
codeBlock = localCodeBlock;
foreach (AssociativeNode elseBody in ifnode.ElseBody)
{
inferedType = new ProtoCore.Type();
inferedType.UID = (int)PrimitiveType.kTypeVar;
DfsTraverse(elseBody, ref inferedType, false, graphNode);
}
// Restore - Set the local codeblock parent to be the current codeblock
codeBlock = localCodeBlock.parent;
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
backpatchTable.Append(pc, L1);
EmitJmp(L1);
}
/*
*
-> backpatch(bpTable, pc)
*/
// ifstmt-exit
// Backpatch all the previous unconditional jumps
Backpatch(backpatchTable.backpatchList, pc);
}
private void EmitIfStmtNode(ImperativeNode node, ref ProtoCore.Type inferedType, ProtoCore.AST.ImperativeAST.BinaryExpressionNode parentNode = null, bool isForInlineCondition = false, ProtoCore.AssociativeGraph.GraphNode graphNode = null)
{
if (IsParsingGlobal() || IsParsingGlobalFunctionBody())
{
/*
def backpatch(bp, pc)
instr = instrstream[bp]
if instr.opcode is jmp
instr.op1 = pc
elseif instr.opcode is cjmp
instr.op2 = pc
end
end
def backpatch(table, pc)
foreach node in table
backpatch(node.pc, pc)
end
end
*/
/*
if(E) -> traverse E
bpTable = new instance
L1 = pc + 1
L2 = null
bp = pc
emit(jmp, _cx, L1, L2)
{
S -> traverse S
L1 = null
bpTable.append(pc)
emit(jmp,labelEnd)
backpatch(bp,pc)
}
* */
int bp = (int)ProtoCore.DSASM.Constants.kInvalidIndex;
int L1 = (int)ProtoCore.DSASM.Constants.kInvalidIndex;
int L2 = (int)ProtoCore.DSASM.Constants.kInvalidIndex;
ProtoCore.DSASM.StackValue opCX = new ProtoCore.DSASM.StackValue();
// If-expr
IfStmtNode ifnode = node as IfStmtNode;
DfsTraverse(ifnode.IfExprNode, ref inferedType, false, graphNode, AssociativeSubCompilePass.kNone, parentNode);
EmitInstrConsole(ProtoCore.DSASM.kw.pop, ProtoCore.DSASM.kw.regCX);
opCX.optype = ProtoCore.DSASM.AddressType.Register;
opCX.opdata = (int)ProtoCore.DSASM.Registers.CX;
EmitPop(opCX, Constants.kGlobalScope);
L1 = pc + 1;
L2 = ProtoCore.DSASM.Constants.kInvalidIndex;
bp = pc;
EmitCJmp(L1, L2, ifnode.IfExprNode.line, ifnode.IfExprNode.col, ifnode.IfExprNode.endLine, ifnode.IfExprNode.endCol);
if (!isForInlineCondition)
{
EmitSetExpressionUID(compileStateTracker.ExpressionUID++);
}
// Create a new codeblock for this block
// Set the current codeblock as the parent of the new codeblock
// Set the new codeblock as a new child of the current codeblock
// Set the new codeblock as the current codeblock
ProtoCore.DSASM.CodeBlock localCodeBlock = new ProtoCore.DSASM.CodeBlock(
ProtoCore.DSASM.CodeBlockType.kConstruct,
Language.kInvalid,
compileStateTracker.CodeBlockIndex++,
new ProtoCore.DSASM.SymbolTable(GetConstructBlockName("if"), compileStateTracker.RuntimeTableIndex++),
null);
localCodeBlock.instrStream = codeBlock.instrStream;
localCodeBlock.parent = codeBlock;
codeBlock.children.Add(localCodeBlock);
codeBlock = localCodeBlock;
compileStateTracker.CompleteCodeBlockList.Add(localCodeBlock);
EmitPushBlockID(localCodeBlock.codeBlockId);
// If-body
foreach (ImperativeNode ifBody in ifnode.IfBody)
{
inferedType = new ProtoCore.Type();
inferedType.UID = (int)PrimitiveType.kTypeVar;
DfsTraverse(ifBody, ref inferedType, false, graphNode, AssociativeSubCompilePass.kNone, parentNode);
}
if (!isForInlineCondition)
{
ProtoCore.AST.Node oldBlockNode = localCodeBlockNode;
localCodeBlockNode = ifnode.IfBodyPosition;
EmitInstrConsole(ProtoCore.DSASM.kw.retcn);
EmitRetcn(localCodeBlock.codeBlockId);
localCodeBlockNode = oldBlockNode;
}
// Restore - Set the local codeblock parent to be the current codeblock
codeBlock = localCodeBlock.parent;
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
BackpatchTable backpatchTable = new BackpatchTable();
backpatchTable.Append(pc, L1);
EmitJmp(L1);
EmitPopBlockID();
// Backpatch the L2 destination of the if block
Backpatch(bp, pc);
/*
else if(E) -> traverse E
L1 = pc + 1
L2 = null
bp = pc
emit(jmp, _cx, L1, L2)
{
S -> traverse S
L1 = null
bpTable.append(pc)
emit(jmp,labelEnd)
backpatch(bp,pc)
}
* */
// Elseif-expr
foreach (ElseIfBlock elseifNode in ifnode.ElseIfList)
{
DfsTraverse(elseifNode.Expr, ref inferedType, false, graphNode);
EmitInstrConsole(ProtoCore.DSASM.kw.pop, ProtoCore.DSASM.kw.regCX);
opCX.optype = ProtoCore.DSASM.AddressType.Register;
opCX.opdata = (int)ProtoCore.DSASM.Registers.CX;
EmitPop(opCX, Constants.kGlobalScope);
L1 = pc + 1;
L2 = ProtoCore.DSASM.Constants.kInvalidIndex;
bp = pc;
EmitCJmp(L1, L2, elseifNode.Expr.line, elseifNode.Expr.col, elseifNode.Expr.endLine, elseifNode.Expr.endCol);
EmitSetExpressionUID(compileStateTracker.ExpressionUID++);
// Elseif-body
if (null != elseifNode.Body)
{
// Create a new codeblock for this block
// Set the current codeblock as the parent of the new codeblock
// Set the new codeblock as a new child of the current codeblock
// Set the new codeblock as the current codeblock
localCodeBlock = new ProtoCore.DSASM.CodeBlock(
ProtoCore.DSASM.CodeBlockType.kConstruct,
Language.kInvalid,
compileStateTracker.CodeBlockIndex++,
new ProtoCore.DSASM.SymbolTable(GetConstructBlockName("elseif"), compileStateTracker.RuntimeTableIndex++),
null);
localCodeBlock.instrStream = codeBlock.instrStream;
localCodeBlock.parent = codeBlock;
codeBlock.children.Add(localCodeBlock);
codeBlock = localCodeBlock;
compileStateTracker.CompleteCodeBlockList.Add(localCodeBlock);
EmitPushBlockID(localCodeBlock.codeBlockId);
foreach (ImperativeNode elseifBody in elseifNode.Body)
{
inferedType = new ProtoCore.Type();
inferedType.UID = (int)PrimitiveType.kTypeVar;
DfsTraverse(elseifBody, ref inferedType, false, graphNode);
}
if (!isForInlineCondition)
{
ProtoCore.AST.Node oldBlockNode = localCodeBlockNode;
localCodeBlockNode = elseifNode.ElseIfBodyPosition;
EmitInstrConsole(ProtoCore.DSASM.kw.retcn);
EmitRetcn(localCodeBlock.codeBlockId);
localCodeBlockNode = oldBlockNode;
}
// Restore - Set the local codeblock parent to be the current codeblock
codeBlock = localCodeBlock.parent;
}
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
backpatchTable.Append(pc, L1);
EmitJmp(L1);
EmitPopBlockID();
// Backpatch the L2 destination of the elseif block
Backpatch(bp, pc);
}
/*
else
{
S -> traverse S
L1 = null
bpTable.append(pc)
emit(jmp,labelEnd)
backpatch(bp,pc)
}
* */
// Else-body
Debug.Assert(null != ifnode.ElseBody);
if (0 != ifnode.ElseBody.Count)
{
// Create a new symboltable for this block
// Set the current table as the parent of the new table
// Set the new table as a new child of the current table
// Set the new table as the current table
// Create a new codeblock for this block
// Set the current codeblock as the parent of the new codeblock
// Set the new codeblock as a new child of the current codeblock
// Set the new codeblock as the current codeblock
localCodeBlock = new ProtoCore.DSASM.CodeBlock(
ProtoCore.DSASM.CodeBlockType.kConstruct,
Language.kInvalid,
compileStateTracker.CodeBlockIndex++,
new ProtoCore.DSASM.SymbolTable(GetConstructBlockName("else"), compileStateTracker.RuntimeTableIndex++),
null);
localCodeBlock.instrStream = codeBlock.instrStream;
localCodeBlock.parent = codeBlock;
codeBlock.children.Add(localCodeBlock);
codeBlock = localCodeBlock;
compileStateTracker.CompleteCodeBlockList.Add(localCodeBlock);
EmitPushBlockID(localCodeBlock.codeBlockId);
foreach (ImperativeNode elseBody in ifnode.ElseBody)
{
inferedType = new ProtoCore.Type();
inferedType.UID = (int)PrimitiveType.kTypeVar;
DfsTraverse(elseBody, ref inferedType, false, graphNode, AssociativeSubCompilePass.kNone, parentNode);
}
if (!isForInlineCondition)
{
ProtoCore.AST.Node oldBlockNode = localCodeBlockNode;
localCodeBlockNode = ifnode.ElseBodyPosition;
EmitInstrConsole(ProtoCore.DSASM.kw.retcn);
EmitRetcn(localCodeBlock.codeBlockId);
localCodeBlockNode = oldBlockNode;
}
// Restore - Set the local codeblock parent to be the current codeblock
codeBlock = localCodeBlock.parent;
L1 = ProtoCore.DSASM.Constants.kInvalidIndex;
backpatchTable.Append(pc, L1);
EmitJmp(L1);
EmitPopBlockID();
}
/*
*
-> backpatch(bpTable, pc)
*/
// ifstmt-exit
// Backpatch all the previous unconditional jumps
Backpatch(backpatchTable.backpatchList, pc);
}
}
protected void EmitExceptionHandlingNode(ProtoCore.AST.Node node, ProtoCore.AssociativeGraph.GraphNode graphNode = null, ProtoCore.DSASM.AssociativeSubCompilePass subPass = ProtoCore.DSASM.AssociativeSubCompilePass.kNone)
{
#if ENABLE_EXCEPTION_HANDLING
if (!IsParsingGlobal() && !IsParsingGlobalFunctionBody())
{
return;
}
ExceptionHandlingNode exceptionNode = node as ExceptionHandlingNode;
if (exceptionNode == null)
return;
tryLevel++;
ExceptionHandler exceptionHandler = new ExceptionHandler();
exceptionHandler.TryLevel = tryLevel;
ExceptionRegistration registration = core.ExceptionHandlingManager.Register(codeBlock.codeBlockId, globalProcIndex, globalClassIndex);
registration.Add(exceptionHandler);
exceptionHandler.StartPc = pc;
TryBlockNode tryNode = exceptionNode.tryBlock;
Debug.Assert(tryNode != null);
foreach (var subnode in tryNode.body)
{
ProtoCore.Type inferedType = new ProtoCore.Type();
inferedType.UID = (int)ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
DfsTraverse(subnode, ref inferedType, false, graphNode, subPass);
}
exceptionHandler.EndPc = pc;
// Jmp to code after catch block
BackpatchTable backpatchTable = new BackpatchTable();
backpatchTable.Append(pc);
EmitJmp(ProtoCore.DSASM.Constants.kInvalidIndex);
foreach (var catchBlock in exceptionNode.catchBlocks)
{
CatchHandler catchHandler = new CatchHandler();
exceptionHandler.AddCatchHandler(catchHandler);
CatchFilterNode filterNode = catchBlock.catchFilter;
Debug.Assert(filterNode != null);
catchHandler.FilterTypeUID = core.TypeSystem.GetType(filterNode.type.Name);
if (catchHandler.FilterTypeUID == (int)PrimitiveType.kInvalidType)
{
string message = String.Format(ProtoCore.BuildData.WarningMessage.kExceptionTypeUndefined, filterNode.type.Name);
buildStatus.LogWarning(ProtoCore.BuildData.WarningID.kTypeUndefined, message, null, filterNode.line, filterNode.col);
catchHandler.FilterTypeUID = (int)PrimitiveType.kTypeVar;
}
// For filter expression catch(e:int), generate an assignment
// e = LX;
catchHandler.Entry = pc;
EmitInstrConsole(ProtoCore.DSASM.kw.push, ProtoCore.DSASM.kw.regLX);
ProtoCore.DSASM.StackValue opLx = new ProtoCore.DSASM.StackValue();
opLx.optype = ProtoCore.DSASM.AddressType.Register;
opLx.opdata = (int)ProtoCore.DSASM.Registers.LX;
EmitPush(opLx);
ProtoCore.DSASM.SymbolNode excpVarSymbol = null;
bool stub;
bool isAllocated = VerifyAllocation(filterNode.var.Value, globalClassIndex, globalProcIndex, out excpVarSymbol, out stub);
int runtimeIndex = (!isAllocated) ? codeBlock.symbolTable.runtimeIndex : excpVarSymbol.runtimeTableIndex;
if (!isAllocated)
{
excpVarSymbol = Allocate(filterNode.var.Value, globalProcIndex, new ProtoCore.Type());
}
EmitPushVarData(runtimeIndex, 0, (int)PrimitiveType.kTypeVar, 0);
EmitInstrConsole(ProtoCore.DSASM.kw.pop, filterNode.var.Value);
EmitPopForSymbol(excpVarSymbol, filterNode.var.line, filterNode.var.col, filterNode.var.endLine, filterNode.var.endCol);
ProtoCore.Type inferedType = new ProtoCore.Type();
inferedType.UID = (int)ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
foreach (var subnode in catchBlock.body)
{
inferedType.UID = (int)ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
DfsTraverse(subnode, ref inferedType, false, graphNode, subPass);
}
// Jmp to code after catch block
backpatchTable.Append(pc);
EmitJmp(ProtoCore.DSASM.Constants.kInvalidIndex);
}
Backpatch(backpatchTable.backpatchList, pc);
tryLevel--;
#endif
}
protected void EmitExceptionHandlingNode(AssociativeNode node, ProtoCore.AssociativeGraph.GraphNode graphNode = null, ProtoCore.DSASM.AssociativeSubCompilePass subPass = ProtoCore.DSASM.AssociativeSubCompilePass.kNone)
{
#if ENABLE_EXCEPTION_HANDLING
if (!IsParsingGlobal() && !IsParsingGlobalFunctionBody() && !IsParsingMemberFunctionBody())
{
return;
}
tryLevel++;
ExceptionHandlingNode exceptionNode = node as ExceptionHandlingNode;
if (exceptionNode == null)
return;
ExceptionHandler exceptionHandler = new ExceptionHandler();
exceptionHandler.TryLevel = tryLevel;
ExceptionRegistration registration = core.ExceptionHandlingManager.Register(codeBlock.codeBlockId, globalProcIndex, globalClassIndex);
registration.Add(exceptionHandler);
exceptionHandler.StartPc = pc;
TryBlockNode tryNode = exceptionNode.tryBlock;
Debug.Assert(tryNode != null);
foreach (var subnode in tryNode.body)
{
ProtoCore.Type inferedType = new ProtoCore.Type();
inferedType.UID = (int) ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
DfsTraverse(subnode, ref inferedType, false, graphNode, subPass);
}
exceptionHandler.EndPc = pc;
// Jmp to code after catch block
BackpatchTable backpatchTable = new BackpatchTable();
backpatchTable.Append(pc);
EmitJmp(ProtoCore.DSASM.Constants.kInvalidIndex);
foreach (var catchBlock in exceptionNode.catchBlocks)
{
CatchHandler catchHandler = new CatchHandler();
exceptionHandler.AddCatchHandler(catchHandler);
CatchFilterNode filterNode = catchBlock.catchFilter;
Debug.Assert(filterNode != null);
catchHandler.FilterTypeUID = core.TypeSystem.GetType(filterNode.type.Name);
if (catchHandler.FilterTypeUID == (int)PrimitiveType.kInvalidType)
{
string message = String.Format(ProtoCore.BuildData.WarningMessage.kExceptionTypeUndefined, filterNode.type.Name);
buildStatus.LogWarning(ProtoCore.BuildData.WarningID.kTypeUndefined, message, core.CurrentDSFileName, filterNode.line, filterNode.col);
catchHandler.FilterTypeUID = (int)PrimitiveType.kTypeVar;
}
ProtoCore.Type inferedType = new ProtoCore.Type();
inferedType.UID = (int) ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
DfsTraverse(filterNode.var, ref inferedType, false, graphNode, subPass);
catchHandler.Entry = pc;
foreach (var subnode in catchBlock.body)
{
inferedType.UID = (int) ProtoCore.PrimitiveType.kTypeVar;
inferedType.IsIndexable = false;
DfsTraverse(subnode, ref inferedType, false, graphNode, subPass);
}
// Jmp to code after catch block
backpatchTable.Append(pc);
EmitJmp(ProtoCore.DSASM.Constants.kInvalidIndex);
}
Backpatch(backpatchTable.backpatchList, pc);
tryLevel--;
#endif
}