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squash all the things

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This commit is contained in:
Elizabeth Hunt 2023-04-23 00:24:42 -06:00
parent 5f28f80c4e
commit a1c15f0461
Signed by: simponic
GPG Key ID: 52B3774857EB24B1
42 changed files with 1019 additions and 494 deletions
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2
.gitignore vendored Normal file
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@ -0,0 +1,2 @@
**/*.asm
classes

28
.vscode/launch.json vendored
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@ -1,28 +0,0 @@
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"type": "java",
"name": "Main",
"request": "launch",
"mainClass": "main.Main",
"projectName": "p5-compiler_25e45799"
},
{
"type": "java",
"name": "Main",
"request": "launch",
"mainClass": "Main",
"projectName": "p5-compiler_25e45799"
},
{
"type": "java",
"name": "Current File",
"request": "launch",
"mainClass": "${file}"
}
]
}

8
.vscode/settings.json vendored
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@ -1,8 +0,0 @@
{
"java.project.referencedLibraries": [
"lib/**/*.jar",
"antlr-4.9.1-complete.jar"
],
"rpc.enabled": false,
"java.debug.settings.onBuildFailureProceed": true
}

13
data/test1.asm
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@ -1,13 +0,0 @@
# All program code is placed after the
# .text assembler directive
.text
# Declare main as a global function
.globl main
j main
# All memory structures are placed after the
# .data assembler directive
.data

4
data/test1.c
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@ -1,3 +1,5 @@
void main() {
void main()
{
println("Hello world");
println(7 % 3, "hi");
}

28
data/test10.c
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@ -1,20 +1,22 @@
int fib(int i) {
if (i == 0) return 1;
if (i == 1) return 1;
return fib(i-1) + fib(i-2);
if (i == 0)
return 1;
if (i == 1)
return 1;
return fib(i - 1) + fib(i - 2);
}
void main() {
println("This program prints the first 11 numbers of the Fibonacci sequence");
println(fib(0)); // 1
println(fib(1)); // 1
println(fib(2)); // 2
println(fib(3)); // 3
println(fib(4)); // 5
println(fib(5)); // 8
println(fib(6)); // 13
println(fib(7)); // 21
println(fib(8)); // 34
println(fib(9)); // 55
println(fib(0)); // 1
println(fib(1)); // 1
println(fib(2)); // 2
println(fib(3)); // 3
println(fib(4)); // 5
println(fib(5)); // 8
println(fib(6)); // 13
println(fib(7)); // 21
println(fib(8)); // 34
println(fib(9)); // 55
println(fib(10)); // 89
}

11
data/test2.c
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@ -1,8 +1,9 @@
void main() {
void main()
{
println("This program prints 7 7 7 7 7 (separated by newlines)");
println(7);
println(3+4);
println(14/2);
println(7*1);
println((7*2)/2);
println(3 + 4);
println(14 / 2);
println(7 * 1);
println((7 * 2) / 2);
}

12
data/test4.c
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@ -8,14 +8,14 @@ void main() {
{
int a;
a = 5;
println(a+b);
println(a + b);
{
int b;
b = 9;
a = -2;
println(a+b);
int b;
b = 9;
a = -2;
println(a + b);
}
b = 4;
}
println(a+b);
println(a + b);
}

2
data/test9.c
View File

@ -19,7 +19,7 @@ void main() {
if (a == 3) {
println("4 correct");
}
if (a >= 4) {
if (a != 4) {
println("5 not correct");
} else {
println("5 correct");

544
submit/ASTVisitor.java
View File

@ -1,304 +1,342 @@
package submit;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.TerminalNode;
import parser.CminusBaseVisitor;
import parser.CminusParser;
import submit.ast.*;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
public class ASTVisitor extends CminusBaseVisitor<Node> {
private final Logger LOGGER;
private SymbolTable symbolTable;
private final Logger LOGGER;
private SymbolTable symbolTable;
public ASTVisitor(Logger LOGGER) {
this.LOGGER = LOGGER;
public ASTVisitor(Logger LOGGER) { this.LOGGER = LOGGER; }
public SymbolTable getSymbolTable() { return symbolTable; }
private VarType getVarType(CminusParser.TypeSpecifierContext ctx) {
final String t = ctx.getText();
return (t.equals("int")) ? VarType.INT
: (t.equals("bool")) ? VarType.BOOL
: VarType.CHAR;
}
@Override
public Node visitProgram(CminusParser.ProgramContext ctx) {
symbolTable = new SymbolTable();
List<Declaration> decls = new ArrayList<>();
for (CminusParser.DeclarationContext d : ctx.declaration()) {
decls.add((Declaration)visitDeclaration(d));
}
return new Program(decls);
}
@Override
public Node visitVarDeclaration(CminusParser.VarDeclarationContext ctx) {
VarType type = getVarType(ctx.typeSpecifier());
List<String> ids = new ArrayList<>();
List<Integer> arraySizes = new ArrayList<>();
for (CminusParser.VarDeclIdContext v : ctx.varDeclId()) {
String id = v.ID().getText();
ids.add(id);
// symbolTable.addSymbol(id, new SymbolInfo(id, type, false));
if (v.NUMCONST() != null) {
arraySizes.add(Integer.parseInt(v.NUMCONST().getText()));
} else {
int offset = symbolTable.addOffset(1);
SymbolInfo symbol = new SymbolInfo(id, type, false, offset);
symbolTable.addSymbol(id, symbol);
arraySizes.add(-1);
}
}
final boolean isStatic = false;
return new VarDeclaration(type, ids, arraySizes, isStatic);
}
@Override
public Node visitFunDeclaration(CminusParser.FunDeclarationContext ctx) {
VarType returnType = null;
if (ctx.typeSpecifier() != null) {
returnType = getVarType(ctx.typeSpecifier());
}
String id = ctx.ID().getText();
symbolTable.addSymbol(id, new SymbolInfo(id, returnType, true));
List<Param> params = new ArrayList<>();
SymbolTable newTable = symbolTable.createChild();
symbolTable = newTable;
if (returnType != null) {
symbolTable.addSymbol("return",
new SymbolInfo("return", returnType, false,
symbolTable.addOffset(1)));
}
public SymbolTable getSymbolTable() {
return symbolTable;
for (CminusParser.ParamContext p : ctx.param()) {
params.add((Param)visitParam(p));
}
private VarType getVarType(CminusParser.TypeSpecifierContext ctx) {
final String t = ctx.getText();
return (t.equals("int")) ? VarType.INT : (t.equals("bool")) ? VarType.BOOL : VarType.CHAR;
}
CompoundStatement statement =
(CompoundStatement)visitStatement(ctx.statement());
@Override
public Node visitProgram(CminusParser.ProgramContext ctx) {
symbolTable = new SymbolTable();
List<Declaration> decls = new ArrayList<>();
for (CminusParser.DeclarationContext d : ctx.declaration()) {
decls.add((Declaration) visitDeclaration(d));
}
return new Program(decls);
}
statement.getSymbolTable().addOtherTableBefore(newTable);
symbolTable = newTable.getParent();
@Override
public Node visitVarDeclaration(CminusParser.VarDeclarationContext ctx) {
VarType type = getVarType(ctx.typeSpecifier());
List<String> ids = new ArrayList<>();
List<Integer> arraySizes = new ArrayList<>();
for (CminusParser.VarDeclIdContext v : ctx.varDeclId()) {
String id = v.ID().getText();
ids.add(id);
symbolTable.addSymbol(id, new SymbolInfo(id, type, false));
if (v.NUMCONST() != null) {
arraySizes.add(Integer.parseInt(v.NUMCONST().getText()));
} else {
arraySizes.add(-1);
}
}
final boolean isStatic = false;
return new VarDeclaration(type, ids, arraySizes, isStatic);
}
return new FunDeclaration(returnType, id, params, statement);
}
@Override
public Node visitFunDeclaration(CminusParser.FunDeclarationContext ctx) {
VarType returnType = null;
if (ctx.typeSpecifier() != null) {
returnType = getVarType(ctx.typeSpecifier());
}
String id = ctx.ID().getText();
List<Param> params = new ArrayList<>();
for (CminusParser.ParamContext p : ctx.param()) {
params.add((Param) visitParam(p));
}
Statement statement = (Statement) visitStatement(ctx.statement());
symbolTable.addSymbol(id, new SymbolInfo(id, returnType, true));
return new FunDeclaration(returnType, id, params, statement);
}
@Override
public Node visitParam(CminusParser.ParamContext ctx) {
VarType type = getVarType(ctx.typeSpecifier());
String id = ctx.paramId().ID().getText();
symbolTable.addSymbol(
id, new SymbolInfo(id, type, false, symbolTable.addOffset(1)));
@Override
public Node visitParam(CminusParser.ParamContext ctx) {
VarType type = getVarType(ctx.typeSpecifier());
String id = ctx.paramId().ID().getText();
symbolTable.addSymbol(id, new SymbolInfo(id, type, false));
return new Param(type, id, ctx.paramId().children.size() > 1);
}
return new Param(type, id, ctx.paramId().children.size() > 1);
}
@Override
public Node visitCompoundStmt(CminusParser.CompoundStmtContext ctx) {
symbolTable = symbolTable.createChild();
List<Statement> statements = new ArrayList<>();
for (CminusParser.VarDeclarationContext d : ctx.varDeclaration()) {
statements.add((VarDeclaration) visitVarDeclaration(d));
}
for (CminusParser.StatementContext d : ctx.statement()) {
statements.add((Statement) visitStatement(d));
}
symbolTable = symbolTable.getParent();
return new CompoundStatement(statements);
}
@Override
public Node visitCompoundStmt(CminusParser.CompoundStmtContext ctx) {
SymbolTable child = symbolTable.createChild();
symbolTable = child;
@Override
public Node visitExpressionStmt(CminusParser.ExpressionStmtContext ctx) {
if (ctx.expression() == null) {
return Statement.empty();
}
return new ExpressionStatement((Expression) visitExpression(ctx.expression()));
List<Statement> statements = new ArrayList<>();
for (CminusParser.VarDeclarationContext d : ctx.varDeclaration()) {
statements.add((VarDeclaration)visitVarDeclaration(d));
}
for (CminusParser.StatementContext d : ctx.statement()) {
statements.add((Statement)visitStatement(d));
}
symbolTable = child.getParent();
@Override
public Node visitIfStmt(CminusParser.IfStmtContext ctx) {
Expression expression = (Expression) visitSimpleExpression(ctx.simpleExpression());
Statement trueStatement = (Statement) visitStatement(ctx.statement(0));
Statement falseStatement = null;
if (ctx.statement().size() > 1) {
falseStatement = (Statement) visitStatement(ctx.statement(1));
}
return new If(expression, trueStatement, falseStatement);
}
return new CompoundStatement(statements, child);
}
@Override
public Node visitWhileStmt(CminusParser.WhileStmtContext ctx) {
Expression expression = (Expression) visitSimpleExpression(ctx.simpleExpression());
Statement statement = (Statement) visitStatement(ctx.statement());
return new While(expression, statement);
@Override
public Node visitExpressionStmt(CminusParser.ExpressionStmtContext ctx) {
if (ctx.expression() == null) {
return Statement.empty();
}
return new ExpressionStatement(
(Expression)visitExpression(ctx.expression()));
}
@Override
public Node visitReturnStmt(CminusParser.ReturnStmtContext ctx) {
if (ctx.expression() != null) {
return new Return((Expression) visitExpression(ctx.expression()));
}
return new Return(null);
@Override
public Node visitIfStmt(CminusParser.IfStmtContext ctx) {
Expression expression =
(Expression)visitSimpleExpression(ctx.simpleExpression());
Statement trueStatement = (Statement)visitStatement(ctx.statement(0));
Statement falseStatement = null;
if (ctx.statement().size() > 1) {
falseStatement = (Statement)visitStatement(ctx.statement(1));
}
return new If(expression, trueStatement, falseStatement);
}
@Override
public Node visitBreakStmt(CminusParser.BreakStmtContext ctx) {
return new Break();
}
@Override
public Node visitWhileStmt(CminusParser.WhileStmtContext ctx) {
Expression expression =
(Expression)visitSimpleExpression(ctx.simpleExpression());
Statement statement = (Statement)visitStatement(ctx.statement());
return new While(expression, statement);
}
@Override
public Node visitExpression(CminusParser.ExpressionContext ctx) {
final Node ret;
CminusParser.MutableContext mutable = ctx.mutable();
CminusParser.ExpressionContext expression = ctx.expression();
if (mutable != null) {
// Assignment
ParseTree operator = ctx.getChild(1);
Mutable lhs = (Mutable) visitMutable(mutable);// new Mutable(mutable.ID().getText(), (Expression)
// visitExpression(mutable.expression()));
Expression rhs = null;
if (expression != null) {
rhs = (Expression) visitExpression(expression);
}
ret = new Assignment(lhs, operator.getText(), rhs);
} else {
ret = visitSimpleExpression(ctx.simpleExpression());
}
return ret;
@Override
public Node visitReturnStmt(CminusParser.ReturnStmtContext ctx) {
if (ctx.expression() != null) {
return new Return((Expression)visitExpression(ctx.expression()));
}
return new Return(null);
}
@Override
public Node visitOrExpression(CminusParser.OrExpressionContext ctx) {
List<Node> ands = new ArrayList<>();
for (CminusParser.AndExpressionContext and : ctx.andExpression()) {
ands.add(visitAndExpression(and));
}
if (ands.size() == 1) {
return ands.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) ands.get(0), "||", (Expression) ands.get(1));
for (int i = 2; i < ands.size(); ++i) {
op = new BinaryOperator(op, "||", (Expression) ands.get(i));
}
return op;
}
@Override
public Node visitBreakStmt(CminusParser.BreakStmtContext ctx) {
return new Break();
}
@Override
public Node visitAndExpression(CminusParser.AndExpressionContext ctx) {
List<Node> uns = new ArrayList<>();
for (CminusParser.UnaryRelExpressionContext un : ctx.unaryRelExpression()) {
uns.add(visitUnaryRelExpression(un));
}
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) uns.get(0), "&&", (Expression) uns.get(1));
for (int i = 2; i < uns.size(); ++i) {
op = new BinaryOperator(op, "&&", (Expression) uns.get(i));
}
return op;
@Override
public Node visitExpression(CminusParser.ExpressionContext ctx) {
final Node ret;
CminusParser.MutableContext mutable = ctx.mutable();
CminusParser.ExpressionContext expression = ctx.expression();
if (mutable != null) {
// Assignment
ParseTree operator = ctx.getChild(1);
Mutable lhs = (Mutable)visitMutable(
mutable); // new Mutable(mutable.ID().getText(), (Expression)
// visitExpression(mutable.expression()));
Expression rhs = null;
if (expression != null) {
rhs = (Expression)visitExpression(expression);
}
ret = new Assignment(lhs, operator.getText(), rhs);
} else {
ret = visitSimpleExpression(ctx.simpleExpression());
}
return ret;
}
@Override
public Node visitUnaryRelExpression(CminusParser.UnaryRelExpressionContext ctx) {
Expression e = (Expression) visitRelExpression(ctx.relExpression());
for (TerminalNode n : ctx.BANG()) {
e = new UnaryOperator("!", e);
}
return e;
@Override
public Node visitOrExpression(CminusParser.OrExpressionContext ctx) {
List<Node> ands = new ArrayList<>();
for (CminusParser.AndExpressionContext and : ctx.andExpression()) {
ands.add(visitAndExpression(and));
}
if (ands.size() == 1) {
return ands.get(0);
}
BinaryOperator op = new BinaryOperator((Expression)ands.get(0), "||",
(Expression)ands.get(1));
for (int i = 2; i < ands.size(); ++i) {
op = new BinaryOperator(op, "||", (Expression)ands.get(i));
}
return op;
}
@Override
public Node visitRelExpression(CminusParser.RelExpressionContext ctx) {
List<Node> uns = new ArrayList<>();
for (CminusParser.SumExpressionContext un : ctx.sumExpression()) {
uns.add(visitSumExpression(un));
}
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) uns.get(0), ctx.relop(0).getText(),
(Expression) uns.get(1));
for (int i = 2; i < uns.size(); ++i) {
op = new BinaryOperator(op, ctx.relop(i - 1).getText(), (Expression) uns.get(i));
}
return op;
@Override
public Node visitAndExpression(CminusParser.AndExpressionContext ctx) {
List<Node> uns = new ArrayList<>();
for (CminusParser.UnaryRelExpressionContext un : ctx.unaryRelExpression()) {
uns.add(visitUnaryRelExpression(un));
}
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator((Expression)uns.get(0), "&&",
(Expression)uns.get(1));
for (int i = 2; i < uns.size(); ++i) {
op = new BinaryOperator(op, "&&", (Expression)uns.get(i));
}
return op;
}
@Override
public Node visitSumExpression(CminusParser.SumExpressionContext ctx) {
List<Node> es = new ArrayList<>();
for (CminusParser.TermExpressionContext e : ctx.termExpression()) {
es.add(visitTermExpression(e));
}
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) es.get(0), ctx.sumop(0).getText(), (Expression) es.get(1));
for (int i = 2; i < es.size(); ++i) {
op = new BinaryOperator(op, ctx.sumop(i - 1).getText(), (Expression) es.get(i));
}
return op;
@Override
public Node
visitUnaryRelExpression(CminusParser.UnaryRelExpressionContext ctx) {
Expression e = (Expression)visitRelExpression(ctx.relExpression());
for (TerminalNode n : ctx.BANG()) {
e = new UnaryOperator("!", e);
}
return e;
}
@Override
public Node visitTermExpression(CminusParser.TermExpressionContext ctx) {
List<Node> es = new ArrayList<>();
for (CminusParser.UnaryExpressionContext e : ctx.unaryExpression()) {
es.add(visitUnaryExpression(e));
}
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) es.get(0), ctx.mulop(0).getText(), (Expression) es.get(1));
for (int i = 2; i < es.size(); ++i) {
op = new BinaryOperator(op, ctx.mulop(i - 1).getText(), (Expression) es.get(i));
}
return op;
@Override
public Node visitRelExpression(CminusParser.RelExpressionContext ctx) {
List<Node> uns = new ArrayList<>();
for (CminusParser.SumExpressionContext un : ctx.sumExpression()) {
uns.add(visitSumExpression(un));
}
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator(
(Expression)uns.get(0), ctx.relop(0).getText(), (Expression)uns.get(1));
for (int i = 2; i < uns.size(); ++i) {
op = new BinaryOperator(op, ctx.relop(i - 1).getText(),
(Expression)uns.get(i));
}
return op;
}
@Override
public Node visitUnaryExpression(CminusParser.UnaryExpressionContext ctx) {
Node ret = visitFactor(ctx.factor());
for (int i = ctx.unaryop().size() - 1; i >= 0; i--) {
ret = new UnaryOperator(ctx.unaryop(i).getText(), (Expression) ret);
}
return ret;
@Override
public Node visitSumExpression(CminusParser.SumExpressionContext ctx) {
List<Node> es = new ArrayList<>();
for (CminusParser.TermExpressionContext e : ctx.termExpression()) {
es.add(visitTermExpression(e));
}
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator(
(Expression)es.get(0), ctx.sumop(0).getText(), (Expression)es.get(1));
for (int i = 2; i < es.size(); ++i) {
op = new BinaryOperator(op, ctx.sumop(i - 1).getText(),
(Expression)es.get(i));
}
return op;
}
@Override
public Node visitMutable(CminusParser.MutableContext ctx) {
Expression e = null;
if (ctx.expression() != null) {
e = (Expression) visitExpression(ctx.expression());
}
String id = ctx.ID().getText();
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() + ": " + id);
}
return new Mutable(id, e);
@Override
public Node visitTermExpression(CminusParser.TermExpressionContext ctx) {
List<Node> es = new ArrayList<>();
for (CminusParser.UnaryExpressionContext e : ctx.unaryExpression()) {
es.add(visitUnaryExpression(e));
}
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator(
(Expression)es.get(0), ctx.mulop(0).getText(), (Expression)es.get(1));
for (int i = 2; i < es.size(); ++i) {
op = new BinaryOperator(op, ctx.mulop(i - 1).getText(),
(Expression)es.get(i));
}
return op;
}
@Override
public Node visitImmutable(CminusParser.ImmutableContext ctx) {
if (ctx.expression() != null) {
return new ParenExpression((Expression) visitExpression(ctx.expression()));
}
return visitChildren(ctx);
@Override
public Node visitUnaryExpression(CminusParser.UnaryExpressionContext ctx) {
Node ret = visitFactor(ctx.factor());
for (int i = ctx.unaryop().size() - 1; i >= 0; i--) {
ret = new UnaryOperator(ctx.unaryop(i).getText(), (Expression)ret);
}
return ret;
}
@Override
public Node visitCall(CminusParser.CallContext ctx) {
final String id = ctx.ID().getText();
final List<Expression> args = new ArrayList<>();
for (CminusParser.ExpressionContext e : ctx.expression()) {
args.add((Expression) visitExpression(e));
}
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() + ": " + id);
}
return new Call(id, args);
@Override
public Node visitMutable(CminusParser.MutableContext ctx) {
Expression e = null;
if (ctx.expression() != null) {
e = (Expression)visitExpression(ctx.expression());
}
String id = ctx.ID().getText();
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() +
": " + id);
}
return new Mutable(id, e);
}
@Override
public Node visitConstant(CminusParser.ConstantContext ctx) {
final Node node;
if (ctx.NUMCONST() != null) {
node = new NumConstant(Integer.parseInt(ctx.NUMCONST().getText()));
} else if (ctx.CHARCONST() != null) {
node = new CharConstant(ctx.CHARCONST().getText().charAt(0));
} else if (ctx.STRINGCONST() != null) {
node = new StringConstant(ctx.STRINGCONST().getText());
} else {
node = new BoolConstant(ctx.getText().equals("true"));
}
return node;
@Override
public Node visitImmutable(CminusParser.ImmutableContext ctx) {
if (ctx.expression() != null) {
return new ParenExpression((Expression)visitExpression(ctx.expression()));
}
return visitChildren(ctx);
}
@Override
public Node visitCall(CminusParser.CallContext ctx) {
final String id = ctx.ID().getText();
final List<Expression> args = new ArrayList<>();
for (CminusParser.ExpressionContext e : ctx.expression()) {
args.add((Expression)visitExpression(e));
}
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() +
": " + id);
}
return new Call(id, args);
}
@Override
public Node visitConstant(CminusParser.ConstantContext ctx) {
final Node node;
if (ctx.NUMCONST() != null) {
node = new NumConstant(Integer.parseInt(ctx.NUMCONST().getText()));
} else if (ctx.CHARCONST() != null) {
node = new CharConstant(ctx.CHARCONST().getText().charAt(0));
} else if (ctx.STRINGCONST() != null) {
node = new StringConstant(ctx.STRINGCONST().getText());
} else {
node = new BoolConstant(ctx.getText().equals("true"));
}
return node;
}
}

1
submit/MIPSResult.java
View File

@ -57,5 +57,4 @@ public class MIPSResult {
public VarType getType() {
return type;
}
}

215
submit/RegisterAllocator.java
View File

@ -15,112 +15,139 @@ import java.util.Set;
*/
public final class RegisterAllocator {
// True if t is used
private final boolean[] t = new boolean[10];
private final boolean[] s = new boolean[8];
private final Set<String> used = new HashSet<>();
// True if t is used
private final boolean[] t = new boolean[10];
private final boolean[] s = new boolean[8];
private final Set<String> used = new HashSet<>();
public RegisterAllocator() {
clearAll();
public RegisterAllocator() { clearAll(); }
public String getRegisterOrLoadIntoRegister(MIPSResult result,
StringBuilder code) {
if (result.getRegister() != null) {
return result.getRegister();
}
String reg = result.getAddress();
return this.loadIntoRegister(result, code, reg);
}
public String getT() {
for (int i = 0; i < t.length; ++i) {
if (!t[i]) {
t[i] = true;
String str = "$t" + i;
used.add(str);
return str;
}
}
return null;
public String loadIntoRegister(MIPSResult result, StringBuilder code,
String register) {
return loadIntoRegisterWithOffset(result, code, register, 0);
}
public String loadIntoRegisterWithOffset(MIPSResult result,
StringBuilder code, String register,
int offset) {
code.append(
String.format("lw %s %d(%s)\n", register, offset, result.getAddress()));
return register;
}
public String getT() {
for (int i = 0; i < t.length; ++i) {
if (!t[i]) {
t[i] = true;
String str = "$t" + i;
used.add(str);
return str;
}
}
return null;
}
// public String getS() {
// for (int i = 0; i < s.length; ++i) {
// if (!s[i]) {
// s[i] = true;
// String str = "$s" + i;
// used.add(str);
// return str;
// }
// }
// return null;
// }
// public String getS() {
// for (int i = 0; i < s.length; ++i) {
// if (!s[i]) {
// s[i] = true;
// String str = "$s" + i;
// used.add(str);
// return str;
// }
// }
// return null;
// }
// Returns the number of bytes used to save the registers
public int saveRestore(StringBuilder code, int baseOffset, boolean s_or_t, boolean save) {
boolean[] r = s;
String prefix = "$s";
if (!s_or_t) {
r = t;
prefix = "$t";
}
String instruction = "sw";
if (!save) {
instruction = "lw";
}
int offset = 0;
for (int i = 0; i < r.length; ++i) {
if (r[i]) {
offset -= 4;
String str = prefix + i;
code.append(instruction).append(" ").append(str).append(" ").append(offset-baseOffset).append("($sp)\n");
}
}
return -offset;
// Returns the number of bytes used to save the registers
public int saveRestore(StringBuilder code, int baseOffset, boolean s_or_t,
boolean save) {
boolean[] r = s;
String prefix = "$s";
if (!s_or_t) {
r = t;
prefix = "$t";
}
// public int saveS(StringBuilder code, int baseOffset) {
// return saveRestore(code, baseOffset, true, true);
// }
public int saveT(StringBuilder code, int baseOffset) {
return saveRestore(code, baseOffset, false, true);
String instruction = "sw";
if (!save) {
instruction = "lw";
}
// public int restoreS(StringBuilder code, int baseOffset) {
// return saveRestore(code, baseOffset, true, false);
// }
public int restoreT(StringBuilder code, int baseOffset) {
return saveRestore(code, baseOffset, false, false);
int offset = 0;
for (int i = 0; i < r.length; ++i) {
if (r[i]) {
offset -= 4;
String str = prefix + i;
code.append(instruction)
.append(" ")
.append(str)
.append(" ")
.append(offset - baseOffset)
.append("($sp)\n");
}
}
return -offset;
}
public List<String> getUsed() {
return new ArrayList<>(used);
}
// public int saveS(StringBuilder code, int baseOffset) {
// return saveRestore(code, baseOffset, true, true);
// }
/**
* Any time you call this method you should seriously consider adding a
* corresponding clear() call.
*
* @return
*/
public String getAny() {
// String availS = getS();
// if (availS != null) {
// return availS;
// }
String t = getT();
if (t == null) {
throw new RuntimeException("Out of registers");
}
return t;
}
public int saveT(StringBuilder code, int baseOffset) {
return saveRestore(code, baseOffset, false, true);
}
public void clear(String reg) {
if (reg.charAt(1) == 's') {
s[Integer.parseInt(reg.substring(2))] = false;
} else if (reg.charAt(1) == 't') {
t[Integer.parseInt(reg.substring(2))] = false;
} else {
throw new RuntimeException("Unexpected register in clear");
}
}
// public int restoreS(StringBuilder code, int baseOffset) {
// return saveRestore(code, baseOffset, true, false);
// }
public void clearAll() {
Arrays.fill(t, false);
Arrays.fill(s, false);
public int restoreT(StringBuilder code, int baseOffset) {
return saveRestore(code, baseOffset, false, false);
}
public List<String> getUsed() { return new ArrayList<>(used); }
/**
* Any time you call this method you should seriously consider adding a
* corresponding clear() call.
*
* @return
*/
public String getAny() {
// String availS = getS();
// if (availS != null) {
// return availS;
// }
String t = getT();
if (t == null) {
throw new RuntimeException("Out of registers");
}
return t;
}
public void clear(String reg) {
if (reg == null)
return;
if (reg.charAt(1) == 's') {
s[Integer.parseInt(reg.substring(2))] = false;
} else if (reg.charAt(1) == 't') {
t[Integer.parseInt(reg.substring(2))] = false;
} else {
throw new RuntimeException("Unexpected register in clear");
}
}
public void clearAll() {
Arrays.fill(t, false);
Arrays.fill(s, false);
}
}

12
submit/SymbolInfo.java
View File

@ -16,6 +16,7 @@ public class SymbolInfo {
// In the case of a function, type is the return type
private final VarType type;
private final boolean function;
private int offset;
public SymbolInfo(String id, VarType type, boolean function) {
this.id = id;
@ -23,9 +24,20 @@ public class SymbolInfo {
this.function = function;
}
public SymbolInfo(String id, VarType type, boolean function, int offset) {
this(id, type, function);
this.offset = offset;
}
@Override
public String toString() {
return "<" + id + ", " + type + '>';
}
public VarType getType() { return type; }
public boolean isFunction() { return function; }
public int getOffset() { return offset; }
public void setOffset(int offset) { this.offset = offset; }
}

67
submit/SymbolTable.java
View File

@ -3,6 +3,7 @@ package submit;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import submit.ast.VarType;
/*
* Code formatter project
@ -17,14 +18,71 @@ public class SymbolTable {
private SymbolTable parent;
private final List<SymbolTable> children;
private int offset;
public static int LABEL_IDENTIFIER = 0;
public static String nextId() {
return Integer.toString(SymbolTable.LABEL_IDENTIFIER++);
}
public SymbolTable() {
offset = 0;
table = new HashMap<>();
parent = null;
children = new ArrayList<>();
this.addGlobalSymbols();
}
public void addSymbol(String id, SymbolInfo symbol) {
table.put(id, symbol);
public List<String> symbolNames() { return new ArrayList<>(table.keySet()); }
public void addGlobalSymbols() {
SymbolInfo println = new SymbolInfo("println", null, true);
this.addSymbol("println", println);
}
public void addSymbol(String id, SymbolInfo symbol) { table.put(id, symbol); }
public int addOffset(int n) {
offset -= 4 * n;
return offset;
}
public int getOffset() { return this.offset; }
// Add symbols in before and reorder offsets such that symbols in before have
// a "higher" offset
public void addOtherTableBefore(SymbolTable before) {
offset = 0;
List<String> thisSymbols = symbolNames();
for (String id : before.symbolNames()) {
SymbolInfo symbol = before.find(id);
if (!symbol.isFunction()) {
addOffset(1);
symbol.setOffset(offset);
}
addSymbol(id, symbol);
}
for (String id : thisSymbols) {
SymbolInfo symbol = table.get(id);
if (!symbol.isFunction()) {
addOffset(1);
table.get(id).setOffset(offset);
}
}
}
public int offsetOf(String id) {
if (table.containsKey(id)) {
return table.get(id).getOffset();
}
if (parent != null) {
return -parent.getOffset() + parent.offsetOf(id);
}
return 0; // This shouldn't happen :D
}
/**
@ -56,8 +114,5 @@ public class SymbolTable {
return child;
}
public SymbolTable getParent() {
return parent;
}
public SymbolTable getParent() { return parent; }
}

2
submit/ast/AbstractNode.java
View File

@ -10,6 +10,6 @@ public class AbstractNode implements Node {
public MIPSResult toMIPS(StringBuilder code, StringBuilder data, SymbolTable symbolTable,
RegisterAllocator regAllocator) {
return null;
return MIPSResult.createVoidResult();
}
}

25
submit/ast/Assignment.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -30,4 +34,25 @@ public class Assignment extends AbstractNode implements Expression {
}
}
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
MIPSResult mut = mutable.toMIPS(code, data, symbolTable, regAllocator);
MIPSResult result = rhs.toMIPS(code, data, symbolTable, regAllocator);
String registerWithAddressOfMutable = mut.getAddress();
if (result.getRegister() != null) {
code.append(String.format("sw %s 0(%s)\n", result.getRegister(),
registerWithAddressOfMutable));
regAllocator.clear(result.getRegister());
} else if (result.getAddress() != null) {
regAllocator.loadIntoRegister(result, code, result.getAddress());
regAllocator.clear(result.getAddress());
}
regAllocator.clear(registerWithAddressOfMutable);
return MIPSResult.createVoidResult();
}
}

89
submit/ast/BinaryOperator.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -13,7 +17,8 @@ public class BinaryOperator extends AbstractNode implements Expression {
private final Expression lhs, rhs;
private final BinaryOperatorType type;
public BinaryOperator(Expression lhs, BinaryOperatorType type, Expression rhs) {
public BinaryOperator(Expression lhs, BinaryOperatorType type,
Expression rhs) {
this.lhs = lhs;
this.type = type;
this.rhs = rhs;
@ -32,4 +37,86 @@ public class BinaryOperator extends AbstractNode implements Expression {
rhs.toCminus(builder, prefix);
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
MIPSResult left = lhs.toMIPS(code, data, symbolTable, regAllocator);
String leftRegister =
regAllocator.getRegisterOrLoadIntoRegister(left, code);
MIPSResult right = rhs.toMIPS(code, data, symbolTable, regAllocator);
String rightRegister =
regAllocator.getRegisterOrLoadIntoRegister(right, code);
String resultRegister = regAllocator.getAny();
switch (type) {
case PLUS:
code.append(String.format("add %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case MINUS:
code.append(String.format("sub %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case TIMES:
code.append(String.format("mult %s %s\n", leftRegister, rightRegister))
.append(String.format("mflo %s\n", resultRegister));
break;
case DIVIDE:
code.append(String.format("div %s %s\n", leftRegister, rightRegister))
.append(String.format("mflo %s\n", resultRegister));
break;
case MOD:
code.append(String.format("div %s %s\n", leftRegister, rightRegister))
.append(String.format("mfhi %s\n", resultRegister));
break;
case LT: