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Added list expr analyze

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master
Apoorva Ranade 3 years ago
parent 1fb6f3f085
commit 530f3ce6ea
1 changed files with 67 additions and 40 deletions
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107
src/main/java/chocopy/pa3/CodeGenImpl.java
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@ -130,7 +130,7 @@ public class CodeGenImpl extends CodeGenBase
}
/** An analyzer that encapsulates code generation for statements. */
private class StmtAnalyzer extends AbstractNodeAnalyzer<Void>
private class StmtAnalyzer extends AbstractNodeAnalyzer<Register>
{
/*
* The symbol table has all the info you need to determine what a given
@ -191,7 +191,7 @@ public class CodeGenImpl extends CodeGenBase
// FIXME: Example of statement.
@Override
public Void analyze(ReturnStmt stmt)
public Register analyze(ReturnStmt stmt)
{
// FIXME: Here, we emit an instruction that does nothing. Clearly,
// this is wrong, and you'll have to fix it.
@ -202,38 +202,38 @@ public class CodeGenImpl extends CodeGenBase
}
@Override
public Void analyze(NoneLiteral node)
public Register analyze(NoneLiteral node)
{
backend.emitMV(Register.A0, Register.ZERO, "Load none");
return null;
return Register.A0;
}
@Override
public Void analyze(StringLiteral node)
public Register analyze(StringLiteral node)
{
Label l = constants.getStrConstant(node.value);
backend.emitLA(Register.A0, l, "Load string literal");
return null;
return Register.A0;
}
@Override
public Void analyze(IntegerLiteral node)
public Register analyze(IntegerLiteral node)
{
backend.emitLI(Register.A0, node.value, "Load integer literal "+node.value);
return null;
return Register.A0;
}
@Override
public Void analyze(BooleanLiteral node)
public Register analyze(BooleanLiteral node)
{
if(node.value==true)
backend.emitLI(Register.A0, 1, "Load boolean literal: true ");
else
backend.emitLI(Register.A0, 0, "Load boolean literal: false ");
return null;
return Register.A0;
}
@Override
public Void analyze(AssignStmt node)
public Register analyze(AssignStmt node)
{
Type t = node.value.getInferredType();
if(t.isSpecialType())
if(t.isSpecialType() || t.isListType())
{
node.value.dispatch(this);
if (sym.getParent() == null)
@ -250,7 +250,7 @@ public class CodeGenImpl extends CodeGenBase
{
StackVarInfo svi = (StackVarInfo) sym.get(((Identifier)target).name);
int loc = offsetMap.get(svi);
backend.emitSW(Register.A0, Register.FP, loc*4, "Load local variable: "+svi.getVarName());
backend.emitSW(Register.A0, Register.FP, -loc*4, "Load local variable: "+svi.getVarName());
}
}
}
@ -258,17 +258,17 @@ public class CodeGenImpl extends CodeGenBase
{//TODO: Object Assignment
}
return null;
return Register.A0;
}
@Override
public Void analyze(ExprStmt node)
public Register analyze(ExprStmt node)
{
node.expr.dispatch(this);
return null;
}
@Override
public Void analyze(IfExpr node)
public Register analyze(IfExpr node)
{
node.condition.dispatch(this);
Label ln = generateLocalLabel();
@ -280,7 +280,7 @@ public class CodeGenImpl extends CodeGenBase
return null;
}
@Override
public Void analyze(IfStmt node)
public Register analyze(IfStmt node)
{
node.condition.dispatch(this);
Label ln = generateLocalLabel();
@ -294,14 +294,14 @@ public class CodeGenImpl extends CodeGenBase
return null;
}
@Override
public Void analyze(BinaryExpr node)
public Register analyze(BinaryExpr node)
{
node.left.dispatch(this);
backend.emitSW(Register.A0, Register.FP, offset*4, "Push on stack slot "+offset);
backend.emitSW(Register.A0, Register.FP, -offset*4, "Push on stack slot "+offset);
offset++;
node.right.dispatch(this);
offset--;
backend.emitLW(Register.T0, Register.FP, (offset)*4, "Pop stack slot "+offset);
backend.emitLW(Register.T0, Register.FP, -offset*4, "Pop stack slot "+offset);
// Arithmetic Operators
if(node.operator.equals("+"))
backend.emitADD(Register.A0, Register.A0, Register.T0, "Add operation");
@ -339,7 +339,7 @@ public class CodeGenImpl extends CodeGenBase
return null;
}
@Override
public Void analyze(UnaryExpr node)
public Register analyze(UnaryExpr node)
{
node.operand.dispatch(this);
if(node.operator.equals("-"))
@ -347,11 +347,11 @@ public class CodeGenImpl extends CodeGenBase
backend.emitLI(Register.T0, -1, "Set value of Registr T0 to -1");
backend.emitMUL(Register.A0, Register.A0, Register.T0, "Multiply by -1");
}
return null;
return Register.A0;
}
@Override
public Void analyze(Identifier node)
public Register analyze(Identifier node)
{
if (sym.getParent() == null)
{
@ -362,27 +362,27 @@ public class CodeGenImpl extends CodeGenBase
{
StackVarInfo svi = (StackVarInfo) sym.get(node.name);
int loc = offsetMap.get(svi);
backend.emitLW(Register.A0, Register.FP, loc*4, "Load local variable: "+svi.getVarName());
backend.emitLW(Register.A0, Register.FP, -loc*4, "Load local variable: "+svi.getVarName());
}
return null;
}
@Override
public Void analyze(VarDef node)
public Register analyze(VarDef node)
{
StackVarInfo svi = (StackVarInfo) sym.get(node.var.identifier.name);
node.value.dispatch(this);
backend.emitSW(Register.A0, Register.FP, offset*4, "Store variable "+node.var.identifier.name+" value in Stack");
backend.emitSW(Register.A0, Register.FP, -offset*4, "Store variable "+node.var.identifier.name+" value in Stack");
offsetMap.put(svi, offset);
offset++;
return null;
}
@Override
public Void analyze(TypedVar node)
public Register analyze(TypedVar node)
{
return null;
}
@Override
public Void analyze(WhileStmt node)
public Register analyze(WhileStmt node)
{
Label startLoop = generateLocalLabel();
backend.emitLocalLabel(startLoop, "Beginning of while loop");
@ -394,30 +394,57 @@ public class CodeGenImpl extends CodeGenBase
backend.emitLocalLabel(endLoop, "End of while loop");
return null;
}
@Override
public Register analyze(ListExpr node) {
int l = node.elements.size();
int i = l;
for(Expr exp:node.elements)
{
Register r = exp.dispatch(this);
backend.emitSW(r,Register.FP,-offset*4,"Push argument "+i+" from last.");
offset++;
i--;
}
backend.emitLI(Register.A0, l, "Pass list length");
backend.emitSW(Register.A0, Register.FP, -offset*4, "Push argument "+i+" from last.");
offset++;
backend.emitADDI(Register.SP, Register.SP, -offset*4, "Set SP to last argument.");
//TODO: Store reference to variable
return Register.A0;
}
@Override
public Void analyze(ForStmt node) {
// control flow
return defaultAction(node);
public Register analyze(ForStmt node) {
System.out.println(node);
/*
node.
Label startLoop = generateLocalLabel();
backend.emitLocalLabel(startLoop, "Beginning of while loop");
node.condition.dispatch(this);
Label endLoop = elseBlock;
for(Stmt stmt:node.body)
stmt.dispatch(this);
backend.emitJ(startLoop, "Jump to beginning of loop");
backend.emitLocalLabel(endLoop, "End of while loop");*/
return null;
}
@Override
public Void analyze(IndexExpr node) {
// statement
public Register analyze(IndexExpr node) {
System.out.println(node);
return defaultAction(node);
}
@Override
public Void analyze(ListExpr node) {
// statement
return defaultAction(node);
}
@Override
public Void analyze(ListType node) {
// statement
public Register analyze(ListType node) {
System.out.println(node);
return defaultAction(node);
}

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