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cleanup

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master
Sanjar Ahmadov 3 years ago
parent 7e9f4b0cab
commit b745aab547
1 changed files with 35 additions and 38 deletions
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73
src/main/java/chocopy/pa3/CodeGenImpl.java
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@ -80,7 +80,7 @@ public class CodeGenImpl extends CodeGenBase
*/
protected void emitTopLevel(List<Stmt> statements)
{
String mainlabel = "@..main.size";
String mainlabel = "@..main.size";
StmtAnalyzer stmtAnalyzer = new StmtAnalyzer(null);
backend.emitADDI(SP, SP, "-"+mainlabel, "Saved FP and saved RA (unused at top level).");
backend.emitSW(ZERO, SP, mainlabel+"-4", "Top saved FP is 0.");
@ -263,18 +263,6 @@ public class CodeGenImpl extends CodeGenBase
{
//object create
ClassInfo cls = (ClassInfo) ty;
/**
la a0, $DoublingVector$prototype # Load pointer to prototype of: DoublingVector
jal alloc # Allocate new object in A0
sw a0, -12(fp) # Push on stack slot 3
sw a0, -16(fp) # Push argument 0 from last.
addi sp, fp, -16 # Set SP to last argument.
lw a1, 8(a0) # Load address of object's dispatch table
lw a1, 0(a1) # Load address of method: DoublingVector.__init__
jalr a1 # Invoke method: DoublingVector.__init__
addi sp, fp, -@..main.size # Set SP to stack frame top.
lw a0, -12(fp) # Pop stack slot 3
*/
backend.emitLA(A0, cls.getPrototypeLabel(), String.format("Load pointer to prototype of: %s", cls.getClassName()));
backend.emitJAL(objectAllocLabel, "Allocate new object in A0");
backend.emitSW(A0, FP, -sp_off*wordSize, String.format("Push on stack slot %d", sp_off));
@ -319,21 +307,18 @@ public class CodeGenImpl extends CodeGenBase
{
backend.emitSW(FP, FP, -(sp_off+1) * wordSize, "Push static link onto active frame.");
}
int origsp = sp_off;
incSp(1);
List<Expr> args = node.args;
int spaceRequiredForArgs = (args.size() + 1)*4;
for (int i = 0; i < args.size(); i++)
{
incSp(1);
int argNum = i + 1;
int slotNum = argNum + 1; // We have extra slot for static link
Expr expr = args.get(i);
expr.dispatch(this);
incSp(1);
Expr expr = args.get(i);
expr.dispatch(this);
String formalParamName = calleeFunctionInfo.getParams().get(i);
StackVarInfo formalParamInfo = (StackVarInfo) calleeFunctionInfo.getSymbolTable().get(formalParamName);
String formalParamName = calleeFunctionInfo.getParams().get(i);
StackVarInfo formalParamInfo = (StackVarInfo) calleeFunctionInfo.getSymbolTable().get(formalParamName);
if (expr.getInferredType().equals(Type.INT_TYPE))
{
@ -355,7 +340,7 @@ public class CodeGenImpl extends CodeGenBase
{
if(!formalParamInfo.getVarType().equals(Type.OBJECT_TYPE) && !formalParamInfo.getVarType().equals(Type.BOOL_TYPE))
{
backend.emitJAL(errorNI, "Passed argument does not match formal parameter");
backend.emitJAL(errorNI, "Passed argument does not match formal parameter");
}
else if ((functionId.name.equals("print"))&&(formalParamInfo.getVarType().equals(Type.OBJECT_TYPE) || formalParamInfo.getVarType().equals(Type.BOOL_TYPE)))
{
@ -365,21 +350,22 @@ public class CodeGenImpl extends CodeGenBase
}
}
// All expressions should save their end result in A0
// So, once expr is evaluated add value inside A0 onto stack as an actual argument
// All expressions should save their end result in A0
// So, once expr is evaluated add value inside A0 onto stack as an actual argument
backend.emitSW(A0, FP, -(sp_off) * wordSize, "Push actual argument for " + formalParamName + " onto stack");
}
backend.emitADDI(SP, FP, -(sp_off)*wordSize, "Set SP to last argument.");
backend.emitJAL(calleeFunctionInfo.getCodeLabel(), "Invoke function: " + functionId.name);
backend.emitADDI(SP, FP, "-"+size_label, "Set SP to stack frame top.");
backend.emitADDI(SP, FP, -(sp_off)*wordSize, "Set SP to last argument.");
backend.emitJAL(calleeFunctionInfo.getCodeLabel(), "Invoke function: " + functionId.name);
backend.emitADDI(SP, FP, "-"+size_label, "Set SP to stack frame top.");
sp_off-=spaceRequiredForArgs/wordSize;
}
return A0;
}
public Register analyze(MethodCallExpr node)
{
Register obj = node.method.object.dispatch(this);
Register obj = node.method.object.dispatch(this);
int n_args = node.args.size();
Label label = generateLocalLabel();
@ -404,7 +390,7 @@ public class CodeGenImpl extends CodeGenBase
String.format("Load address of method: %s.%s", objectClass.getClassName(), node.method.member.name));
backend.emitADDI(SP, FP, -sp_off * wordSize, "Set SP to last argument.");
backend.emitJALR(A1, String.format("Invoke method: %s.%s", objectClass.getClassName(), node.method.member.name));
backend.emitInsn(String.format("addi sp, fp, -%s", size_label), "Set SP to stack frame top.");
backend.emitADDI(SP, FP, "-" + size_label, "Set SP to stack frame top");
sp_off -= n_args+1;
return A0;
@ -414,13 +400,15 @@ public class CodeGenImpl extends CodeGenBase
@Override
public Register analyze(ReturnStmt stmt)
{
Expr expr = stmt.value;
if(expr == null)
Expr expr = stmt.value;
if (expr == null) {
backend.emitMV(A0, ZERO, "Return None");
else
} else {
// All expressions should save their end result in A0
expr.dispatch(this);
backend.emitJ(this.epilogue, "Jump to function epilogue");
}
backend.emitJ(this.epilogue, "Jump to function epilogue");
return A0;
}
@ -906,28 +894,37 @@ public class CodeGenImpl extends CodeGenBase
Label startLoop = generateLocalLabel();
Label endLoop = generateLocalLabel();
Label temp = generateLocalLabel();
r=getRegister();
regs.add(r);
Register iden = registerPool[r];
node.iterable.dispatch(this);
r=getRegister();
regs.add(r);
Register l = registerPool[r];
r=getRegister();
regs.add(r);
Register ln = registerPool[r];
backend.emitBNEZ(Register.A0, temp, "Ensure not none");
backend.emitJ(errorNone, "Empty List");
backend.emitLocalLabel(temp, "Continue execution for for-loop");
backend.emitMV(l,Register.A0,"Location of list");
r=getRegister();
regs.add(r);
Register iter = registerPool[r];
backend.emitSW(l, Register.FP, -sp_off*wordSize, "Store location on stack");
incSp(1);
backend.emitMV(iter, Register.ZERO, "Initialize index variable");
backend.emitSW(iter, Register.FP, -sp_off*wordSize, "Store index on stack");
incSp(1);
backend.emitLocalLabel(startLoop, "Start for loop");
backend.emitLW(iter, Register.FP, -(sp_off-1)*wordSize, "Load index from stack");
backend.emitLW(l, Register.FP, -(sp_off-2)*wordSize, "Store list location from stack");
@ -946,7 +943,7 @@ public class CodeGenImpl extends CodeGenBase
GlobalVarInfo gvi=(GlobalVarInfo) info;
backend.emitSW(iden, gvi.getLabel(), Register.T0, "Assign global: "+node.identifier.name+"(using tmp register)");
}
else
else
{
StackVarRuntimeInfo rtinfo = (StackVarRuntimeInfo) getVar(node.identifier);
backend.emitSW(iden, rtinfo.sl, rtinfo.off,"Store local variable: "+node.identifier.name);
@ -957,8 +954,8 @@ public class CodeGenImpl extends CodeGenBase
sp_off -= 2;
backend.emitJ(startLoop, "Jump to beginning of loop");
backend.emitLocalLabel(endLoop, "End of for loop");
}
else if (node.iterable.getInferredType().equals(Type.STR_TYPE))
}
else if (node.iterable.getInferredType().equals(Type.STR_TYPE))
{
Label startLoop = generateLocalLabel();
Label endLoop = generateLocalLabel();
@ -1018,10 +1015,10 @@ public class CodeGenImpl extends CodeGenBase
{
backend.emitJAL(errorNI, "Operator not implemented");
}
for(int n:regs)
for(int n:regs) {
freeRegister(n);
}
return null;
}
@Override

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