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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");
}

6
data/test10.c
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@ -1,6 +1,8 @@
int fib(int i) {
if (i == 0) return 1;
if (i == 1) return 1;
if (i == 0)
return 1;
if (i == 1)
return 1;
return fib(i - 1) + fib(i - 2);
}

3
data/test2.c
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@ -1,4 +1,5 @@
void main() {
void main()
{
println("This program prints 7 7 7 7 7 (separated by newlines)");
println(7);
println(3 + 4);

2
data/test9.c
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@ -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");

106
submit/ASTVisitor.java
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@ -1,30 +1,27 @@
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;
public ASTVisitor(Logger LOGGER) {
this.LOGGER = LOGGER;
}
public ASTVisitor(Logger LOGGER) { this.LOGGER = LOGGER; }
public SymbolTable getSymbolTable() {
return symbolTable;
}
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;
return (t.equals("int")) ? VarType.INT
: (t.equals("bool")) ? VarType.BOOL
: VarType.CHAR;
}
@Override
@ -45,10 +42,15 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
for (CminusParser.VarDeclIdContext v : ctx.varDeclId()) {
String id = v.ID().getText();
ids.add(id);
symbolTable.addSymbol(id, new SymbolInfo(id, type, false));
// 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);
}
}
@ -63,12 +65,29 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
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)));
}
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));
CompoundStatement statement =
(CompoundStatement)visitStatement(ctx.statement());
statement.getSymbolTable().addOtherTableBefore(newTable);
symbolTable = newTable.getParent();
return new FunDeclaration(returnType, id, params, statement);
}
@ -76,13 +95,17 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
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.addSymbol(
id, new SymbolInfo(id, type, false, symbolTable.addOffset(1)));
return new Param(type, id, ctx.paramId().children.size() > 1);
}
@Override
public Node visitCompoundStmt(CminusParser.CompoundStmtContext ctx) {
symbolTable = symbolTable.createChild();
SymbolTable child = symbolTable.createChild();
symbolTable = child;
List<Statement> statements = new ArrayList<>();
for (CminusParser.VarDeclarationContext d : ctx.varDeclaration()) {
statements.add((VarDeclaration)visitVarDeclaration(d));
@ -90,8 +113,9 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
for (CminusParser.StatementContext d : ctx.statement()) {
statements.add((Statement)visitStatement(d));
}
symbolTable = symbolTable.getParent();
return new CompoundStatement(statements);
symbolTable = child.getParent();
return new CompoundStatement(statements, child);
}
@Override
@ -99,12 +123,14 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (ctx.expression() == null) {
return Statement.empty();
}
return new ExpressionStatement((Expression) visitExpression(ctx.expression()));
return new ExpressionStatement(
(Expression)visitExpression(ctx.expression()));
}
@Override
public Node visitIfStmt(CminusParser.IfStmtContext ctx) {
Expression expression = (Expression) visitSimpleExpression(ctx.simpleExpression());
Expression expression =
(Expression)visitSimpleExpression(ctx.simpleExpression());
Statement trueStatement = (Statement)visitStatement(ctx.statement(0));
Statement falseStatement = null;
if (ctx.statement().size() > 1) {
@ -115,7 +141,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
@Override
public Node visitWhileStmt(CminusParser.WhileStmtContext ctx) {
Expression expression = (Expression) visitSimpleExpression(ctx.simpleExpression());
Expression expression =
(Expression)visitSimpleExpression(ctx.simpleExpression());
Statement statement = (Statement)visitStatement(ctx.statement());
return new While(expression, statement);
}
@ -141,7 +168,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (mutable != null) {
// Assignment
ParseTree operator = ctx.getChild(1);
Mutable lhs = (Mutable) visitMutable(mutable);// new Mutable(mutable.ID().getText(), (Expression)
Mutable lhs = (Mutable)visitMutable(
mutable); // new Mutable(mutable.ID().getText(), (Expression)
// visitExpression(mutable.expression()));
Expression rhs = null;
if (expression != null) {
@ -163,7 +191,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (ands.size() == 1) {
return ands.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) ands.get(0), "||", (Expression) ands.get(1));
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));
}
@ -179,7 +208,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) uns.get(0), "&&", (Expression) uns.get(1));
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));
}
@ -187,7 +217,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
}
@Override
public Node visitUnaryRelExpression(CminusParser.UnaryRelExpressionContext ctx) {
public Node
visitUnaryRelExpression(CminusParser.UnaryRelExpressionContext ctx) {
Expression e = (Expression)visitRelExpression(ctx.relExpression());
for (TerminalNode n : ctx.BANG()) {
e = new UnaryOperator("!", e);
@ -204,10 +235,11 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (uns.size() == 1) {
return uns.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) uns.get(0), ctx.relop(0).getText(),
(Expression) uns.get(1));
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));
op = new BinaryOperator(op, ctx.relop(i - 1).getText(),
(Expression)uns.get(i));
}
return op;
}
@ -221,9 +253,11 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) es.get(0), ctx.sumop(0).getText(), (Expression) es.get(1));
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));
op = new BinaryOperator(op, ctx.sumop(i - 1).getText(),
(Expression)es.get(i));
}
return op;
}
@ -237,9 +271,11 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
if (es.size() == 1) {
return es.get(0);
}
BinaryOperator op = new BinaryOperator((Expression) es.get(0), ctx.mulop(0).getText(), (Expression) es.get(1));
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));
op = new BinaryOperator(op, ctx.mulop(i - 1).getText(),
(Expression)es.get(i));
}
return op;
}
@ -261,7 +297,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
}
String id = ctx.ID().getText();
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() + ": " + id);
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() +
": " + id);
}
return new Mutable(id, e);
}
@ -282,7 +319,8 @@ public class ASTVisitor extends CminusBaseVisitor<Node> {
args.add((Expression)visitExpression(e));
}
if (symbolTable.find(id) == null) {
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() + ": " + id);
LOGGER.warning("Undefined symbol on line " + ctx.getStart().getLine() +
": " + id);
}
return new Call(id, args);
}

1
submit/MIPSResult.java
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@ -57,5 +57,4 @@ public class MIPSResult {
public VarType getType() {
return type;
}
}

41
submit/RegisterAllocator.java
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@ -20,8 +20,29 @@ public final class RegisterAllocator {
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 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() {
@ -49,7 +70,8 @@ public final class RegisterAllocator {
// }
// Returns the number of bytes used to save the registers
public int saveRestore(StringBuilder code, int baseOffset, boolean s_or_t, boolean save) {
public int saveRestore(StringBuilder code, int baseOffset, boolean s_or_t,
boolean save) {
boolean[] r = s;
String prefix = "$s";
if (!s_or_t) {
@ -65,7 +87,12 @@ public final class RegisterAllocator {
if (r[i]) {
offset -= 4;
String str = prefix + i;
code.append(instruction).append(" ").append(str).append(" ").append(offset-baseOffset).append("($sp)\n");
code.append(instruction)
.append(" ")
.append(str)
.append(" ")
.append(offset - baseOffset)
.append("($sp)\n");
}
}
return -offset;
@ -87,9 +114,7 @@ public final class RegisterAllocator {
return saveRestore(code, baseOffset, false, false);
}
public List<String> getUsed() {
return new ArrayList<>(used);
}
public List<String> getUsed() { return new ArrayList<>(used); }
/**
* Any time you call this method you should seriously consider adding a
@ -110,6 +135,8 @@ public final class RegisterAllocator {
}
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') {

12
submit/SymbolInfo.java
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@ -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
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@ -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:
code.append(String.format("slt %s %s %s\n", resultRegister, leftRegister,
rightRegister))
.append(
String.format("subi %s %s 1\n", resultRegister, resultRegister));
break;
case GT:
code.append(String.format("slt %s %s %s\n", resultRegister, rightRegister,
leftRegister))
.append(
String.format("subi %s %s 1\n", resultRegister, resultRegister));
break;
case LE:
code.append(String.format("slt %s %s %s\n", resultRegister, rightRegister,
leftRegister));
break;
case GE:
code.append(String.format("slt %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case EQ:
code.append(String.format("sub %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case OR:
code.append(String.format("or %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case AND:
code.append(String.format("abs %s %s\n", leftRegister, leftRegister))
.append(String.format("abs %s %s\n", rightRegister, rightRegister))
.append(String.format("add %s %s %s\n", resultRegister, leftRegister,
rightRegister));
break;
case NE:
code.append(String.format("xor %s %s %s\n", resultRegister, leftRegister,
rightRegister))
.append(
String.format("sltiu %s %s 1\n", resultRegister, resultRegister));
default:
break;
}
regAllocator.clear(leftRegister);
regAllocator.clear(rightRegister);
return MIPSResult.createRegisterResult(resultRegister, VarType.INT);
}
}

24
submit/ast/BinaryOperatorType.java
View File

@ -10,15 +10,23 @@ package submit.ast;
*/
public enum BinaryOperatorType {
OR("||"), AND("&&"),
LE("<="), LT("<"), GT(">"), GE(">="), EQ("=="), NE("!="),
PLUS("+"), MINUS("-"), TIMES("*"), DIVIDE("/"), MOD("%");
OR("||"),
AND("&&"),
LE("<="),
LT("<"),
GT(">"),
GE(">="),
EQ("=="),
NE("!="),
PLUS("+"),
MINUS("-"),
TIMES("*"),
DIVIDE("/"),
MOD("%");
private final String value;
private BinaryOperatorType(String value) {
this.value = value;
}
private BinaryOperatorType(String value) { this.value = value; }
public static BinaryOperatorType fromString(String s) {
for (BinaryOperatorType at : BinaryOperatorType.values()) {
@ -26,12 +34,12 @@ public enum BinaryOperatorType {
return at;
}
}
throw new RuntimeException("Illegal string in OperatorType.fromString(): " + s);
throw new RuntimeException("Illegal string in OperatorType.fromString(): " +
s);
}
@Override
public String toString() {
return value;
}
}

6
submit/ast/BoolConstant.java
View File

@ -9,12 +9,9 @@ package submit.ast;
* @author edwajohn
*/
public class BoolConstant extends AbstractNode implements Expression {
private final boolean value;
public BoolConstant(boolean value) {
this.value = value;
}
public BoolConstant(boolean value) { this.value = value; }
public void toCminus(StringBuilder builder, final String prefix) {
if (value) {
@ -23,5 +20,4 @@ public class BoolConstant extends AbstractNode implements Expression {
builder.append("false");
}
}
}

2
submit/ast/Break.java
View File

@ -9,10 +9,8 @@ package submit.ast;
* @author edwajohn
*/
public class Break extends AbstractNode implements Statement {
@Override
public void toCminus(StringBuilder builder, String prefix) {
builder.append(prefix).append("break;\n");
}
}

104
submit/ast/Call.java
View File

@ -6,12 +6,16 @@ package submit.ast;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
*/
public class Call extends AbstractNode implements Expression {
public class Call implements Expression {
private final String id;
private final List<Expression> args;
@ -21,6 +25,39 @@ public class Call extends AbstractNode implements Expression {
this.args = new ArrayList<>(args);
}
private void println(List<MIPSResult> mipsResults, StringBuilder code,
StringBuilder data, SymbolTable symbolTable,
RegisterAllocator regAllocator) {
code.append("# println\n");
for (MIPSResult result : mipsResults) {
if (result.getRegister() == null && result.getAddress() != null) {
if (result.getAddress().startsWith("$")) {
// Hack - might be a register
regAllocator.loadIntoRegister(result, code, "$a0");
} else {
code.append(String.format("la $a0 %s\n", result.getAddress()));
}
} else if (result.getRegister() != null) {
code.append(String.format("move $a0 %s\n", result.getRegister()));
}
if (result.getType() == VarType.INT) {
code.append("li $v0 1\n");
} else if (result.getType() == VarType.CHAR) {
code.append("li $v0 11\n");
} else {
code.append("li $v0 4\n");
}
code.append("syscall\n");
}
// End line with newline
code.append(String.format("la $a0 %s\n", "newline"));
code.append("li $v0 4\n");
code.append("syscall\n");
}
@Override
public void toCminus(StringBuilder builder, String prefix) {
builder.append(id).append("(");
@ -34,4 +71,69 @@ public class Call extends AbstractNode implements Expression {
builder.append(")");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
List<MIPSResult> argMips;
String resultRegister = null;
if (this.id.equals("println")) {
argMips =
args.stream()
.map(e -> e.toMIPS(code, data, symbolTable, regAllocator))
.collect(Collectors.toList());
this.println(argMips, code, data, symbolTable, regAllocator);
} else {
argMips = new ArrayList<MIPSResult>();
String returnAddr = regAllocator.getAny();
code.append(String.format("move %s $ra\n", returnAddr));
int savedRegistersOffset = regAllocator.saveRestore(
code, -symbolTable.getOffset(), false, true);
int argsOffset = symbolTable.getOffset() - savedRegistersOffset;
int i = argsOffset;
for (Expression expression : args) {
MIPSResult mipsResult =
expression.toMIPS(code, data, symbolTable, regAllocator);
argMips.add(mipsResult);
i -= 4;
String reg =
regAllocator.getRegisterOrLoadIntoRegister(mipsResult, code);
code.append(String.format("sw %s %d($sp)\n", reg, i));
regAllocator.clear(reg);
}
code.append(String.format("add $sp $sp %d\n", argsOffset));
code.append(String.format("jal %s\n", id));
code.append(String.format("add $sp $sp %d\n", -argsOffset));
regAllocator.saveRestore(code, -symbolTable.getOffset(), false,
false);
code.append(String.format("# symbol table size - %d\n", i));
resultRegister = regAllocator.getAny();
regAllocator.loadIntoRegisterWithOffset(
MIPSResult.createAddressResult("$sp", VarType.INT), code,
resultRegister, i - 4);
code.append(String.format("move $ra %s\n", returnAddr));
regAllocator.clear(returnAddr);
}
for (MIPSResult arg : argMips)
if (arg.getRegister() != null)
regAllocator.clear(arg.getRegister());
if (resultRegister != null) {
VarType returnType = symbolTable.find(id).getType();
return MIPSResult.createRegisterResult(resultRegister, returnType);
}
return MIPSResult.createVoidResult();
}
}

6
submit/ast/CharConstant.java
View File

@ -9,15 +9,11 @@ package submit.ast;
* @author edwajohn
*/
public class CharConstant extends AbstractNode implements Expression {
private final char value;
public CharConstant(char value) {
this.value = value;
}
public CharConstant(char value) { this.value = value; }
public void toCminus(StringBuilder builder, final String prefix) {
builder.append("'").append(value).append("'");
}
}

31
submit/ast/CompoundStatement.java
View File

@ -5,6 +5,9 @@
package submit.ast;
import java.util.List;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
@ -13,11 +16,16 @@ import java.util.List;
public class CompoundStatement extends AbstractNode implements Statement {
private final List<Statement> statements;
private SymbolTable symbolTable;
public CompoundStatement(List<Statement> statements) {
public CompoundStatement(List<Statement> statements,
SymbolTable symbolTable) {
this.statements = statements;
this.symbolTable = symbolTable;
}
public SymbolTable getSymbolTable() { return symbolTable; }
@Override
public void toCminus(StringBuilder builder, String prefix) {
builder.append(prefix).append("{\n");
@ -27,4 +35,25 @@ public class CompoundStatement extends AbstractNode implements Statement {
builder.append(prefix).append("}\n");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
code.append("# Entering a new scope.\n");
code.append("# Symbols in symbol table:\n");
for (String name : this.symbolTable.symbolNames())
code.append(
String.format("# %s : %d\n", name, this.symbolTable.offsetOf(name)));
code.append("# Update the stack pointer.\n");
code.append(String.format("addi $sp $sp %d\n", symbolTable.getOffset()));
for (Statement statement : statements)
statement.toMIPS(code, data, this.symbolTable, regAllocator);
code.append("# Exit scope.\n");
code.append(String.format("addi $sp $sp %s\n", -symbolTable.getOffset()));
return MIPSResult.createVoidResult();
}
}

4
submit/ast/Declaration.java
View File

@ -8,6 +8,4 @@ package submit.ast;
*
* @author edwajohn
*/
public interface Declaration extends Statement {
}
public interface Declaration extends Statement {}

4
submit/ast/Expression.java
View File

@ -8,6 +8,4 @@ package submit.ast;
*
* @author edwajohn
*/
public interface Expression extends Node {
}
public interface Expression extends Node {}

11
submit/ast/ExpressionStatement.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -23,4 +27,11 @@ public class ExpressionStatement extends AbstractNode implements Statement {
builder.append(";\n");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
expression.toMIPS(code, data, symbolTable, regAllocator);
return MIPSResult.createVoidResult();
}
}

19
submit/ast/FunDeclaration.java
View File

@ -6,6 +6,9 @@ package submit.ast;
import java.util.ArrayList;
import java.util.List;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
@ -43,4 +46,20 @@ public class FunDeclaration extends AbstractNode implements Declaration {
statement.toCminus(builder, prefix);
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
code.append(id).append(":\n");
statement.toMIPS(code, data, symbolTable, regAllocator);
if (id.equals("main"))
code.append("li $v0 10\nsyscall\n");
else
code.append("jr $ra\n");
regAllocator.clearAll();
return MIPSResult.createVoidResult();
}
}

40
submit/ast/If.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -14,7 +18,8 @@ public class If extends AbstractNode implements Statement {
private final Statement trueStatement;
private final Statement falseStatement;
public If(Expression expression, Statement trueStatement, Statement falseStatement) {
public If(Expression expression, Statement trueStatement,
Statement falseStatement) {
this.expression = expression;
this.trueStatement = trueStatement;
this.falseStatement = falseStatement;
@ -41,4 +46,37 @@ public class If extends AbstractNode implements Statement {
}
// builder.append(prefix).append("}");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
String continueLabel = "if_" + SymbolTable.nextId();
String elseLabel = "else_" + SymbolTable.nextId();
MIPSResult expressionTruthiness =
expression.toMIPS(code, data, symbolTable, regAllocator);
code.append(String.format("bne %s $zero %s\n",
expressionTruthiness.getRegister(), elseLabel));
regAllocator.clear(expressionTruthiness.getRegister());
MIPSResult trueRes =
trueStatement.toMIPS(code, data, symbolTable, regAllocator);
regAllocator.clear(trueRes.getRegister());
code.append(String.format("j %s\n", continueLabel))
.append(String.format("%s:\n", elseLabel));
regAllocator.clear(expressionTruthiness.getRegister());
if (falseStatement != null) {
MIPSResult falseRes =
falseStatement.toMIPS(code, data, symbolTable, regAllocator);
regAllocator.clear(falseRes.getRegister());
}
code.append(String.format("%s:\n", continueLabel));
return MIPSResult.createVoidResult();
}
}

16
submit/ast/Mutable.java
View File

@ -4,11 +4,15 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
*/
public class Mutable extends AbstractNode implements Expression {
public class Mutable implements Expression {
private final String id;
private final Expression index;
@ -28,4 +32,14 @@ public class Mutable extends AbstractNode implements Expression {
}
}
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
String stackReg = regAllocator.getAny();
code.append(String.format("li %s %d\n", stackReg, symbolTable.offsetOf(id)))
.append(String.format("add %s %s $sp\n", stackReg, stackReg));
return MIPSResult.createAddressResult(stackReg, VarType.INT);
}
}

3
submit/ast/Node.java
View File

@ -7,5 +7,6 @@ import submit.SymbolTable;
public interface Node {
void toCminus(StringBuilder builder, final String prefix);
MIPSResult toMIPS(StringBuilder code, StringBuilder data, SymbolTable symbolTable, RegisterAllocator regAllocator);
MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable, RegisterAllocator regAllocator);
}

17
submit/ast/NumConstant.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -12,12 +16,19 @@ public class NumConstant extends AbstractNode implements Expression {
private final int value;
public NumConstant(int value) {
this.value = value;
}
public NumConstant(int value) { this.value = value; }
public void toCminus(StringBuilder builder, final String prefix) {
builder.append(Integer.toString(value));
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
String register = regAllocator.getAny();
code.append(String.format("li %s %d\n", register, value));
return MIPSResult.createRegisterResult(register, VarType.INT);
}
}

13
submit/ast/Param.java
View File

@ -20,17 +20,11 @@ public class Param extends AbstractNode implements Node {
this.array = array;
}
public VarType getType() {
return type;
}
public VarType getType() { return type; }
public String getId() {
return id;
}
public String getId() { return id; }
public boolean isArray() {
return array;
}
public boolean isArray() { return array; }
public void toCminus(StringBuilder builder, final String prefix) {
if (isArray()) {
@ -39,5 +33,4 @@ public class Param extends AbstractNode implements Node {
builder.append(type).append(" ").append(id);
}
}
}

10
submit/ast/ParenExpression.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -23,4 +27,10 @@ public class ParenExpression extends AbstractNode implements Expression {
builder.append(")");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
return expression.toMIPS(code, data, symbolTable, regAllocator);
}
}

13
submit/ast/Program.java
View File

@ -6,6 +6,9 @@ package submit.ast;
import java.util.ArrayList;
import java.util.List;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
@ -33,4 +36,14 @@ public class Program extends AbstractNode implements Node {
}
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
data.append("newline: .asciiz \"\\n\"\n");
for (Declaration declaration : declarations)
declaration.toMIPS(code, data, symbolTable, regAllocator);
return MIPSResult.createVoidResult();
}
}

24
submit/ast/Return.java
View File

@ -4,17 +4,18 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
*/
public class Return extends AbstractNode implements Statement {
private final Expression expr;
public Return(Expression expr) {
this.expr = expr;
}
public Return(Expression expr) { this.expr = expr; }
@Override
public void toCminus(StringBuilder builder, String prefix) {
@ -28,4 +29,19 @@ public class Return extends AbstractNode implements Statement {
}
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
if (expr != null) {
String reg = regAllocator.getRegisterOrLoadIntoRegister(
expr.toMIPS(code, data, symbolTable, regAllocator), code);
code.append(
String.format("# symbol table size - %d\n", symbolTable.getOffset()));
code.append(
String.format("sw %s %d($sp)\n", reg, symbolTable.getOffset()));
code.append("jr $ra\n");
}
return MIPSResult.createVoidResult();
}
}

6
submit/ast/Statement.java
View File

@ -11,6 +11,8 @@ import java.util.ArrayList;
* @author edwajohn
*/
public interface Statement extends Node {
public static CompoundStatement empty() { return new CompoundStatement(new ArrayList<>()); }
public static CompoundStatement empty() {
submit.SymbolTable newTable = new submit.SymbolTable();
return new CompoundStatement(new ArrayList<>(), newTable);
}
}

17
submit/ast/StringConstant.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -12,12 +16,19 @@ public class StringConstant extends AbstractNode implements Expression {
private final String value;
public StringConstant(String value) {
this.value = value;
}
public StringConstant(String value) { this.value = value; }
public void toCminus(StringBuilder builder, final String prefix) {
builder.append("\"").append(value).append("\"");
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
String label = String.format("string_%s", SymbolTable.nextId());
data.append(String.format("%s: .asciiz %s\n", label, value));
return MIPSResult.createAddressResult(label, null);
}
}

26
submit/ast/UnaryOperator.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -23,5 +27,27 @@ public class UnaryOperator extends AbstractNode implements Expression {
builder.append(type);
expression.toCminus(builder, prefix);
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
MIPSResult result =
expression.toMIPS(code, data, symbolTable, regAllocator);
String reg = regAllocator.getRegisterOrLoadIntoRegister(result, code);
switch (type) {
case NEG:
code.append(String.format("sub %s $zero %s\n", reg, reg));
break;
case NOT:
code.append(String.format("sltu %s $zero %s\n", reg, reg))
.append(String.format("xori %s %s 1\n", reg, reg));
break;
default:
break;
}
return MIPSResult.createRegisterResult(reg, VarType.INT);
}
}

7
submit/ast/VarDeclaration.java
View File

@ -18,7 +18,8 @@ public class VarDeclaration extends AbstractNode implements Declaration {
private final List<Integer> arraySizes;
private final boolean isStatic;
public VarDeclaration(VarType type, List<String> ids, List<Integer> arraySizes, boolean isStatic) {
public VarDeclaration(VarType type, List<String> ids,
List<Integer> arraySizes, boolean isStatic) {
this.type = type;
this.ids = new ArrayList<>(ids);
this.arraySizes = arraySizes;
@ -35,7 +36,8 @@ public class VarDeclaration extends AbstractNode implements Declaration {
final String id = ids.get(i);
final int arraySize = arraySizes.get(i);
if (arraySize >= 0) {
builder.append(id).append("[").append(arraySize).append("]").append(", ");
builder.append(id).append("[").append(arraySize).append("]").append(
", ");
} else {
builder.append(id).append(", ");
}
@ -43,5 +45,4 @@ public class VarDeclaration extends AbstractNode implements Declaration {
builder.delete(builder.length() - 2, builder.length());
builder.append(";\n");
}
}

9
submit/ast/VarType.java
View File

@ -10,13 +10,13 @@ package submit.ast;
*/
public enum VarType {
INT("int"), BOOL("bool"), CHAR("char");
INT("int"),
BOOL("bool"),
CHAR("char");
private final String value;
private VarType(String value) {
this.value = value;
}
private VarType(String value) { this.value = value; }
public static VarType fromString(String s) {
for (VarType vt : VarType.values()) {
@ -31,5 +31,4 @@ public enum VarType {
public String toString() {
return value;
}
}

27
submit/ast/While.java
View File

@ -4,6 +4,10 @@
*/
package submit.ast;
import submit.MIPSResult;
import submit.RegisterAllocator;
import submit.SymbolTable;
/**
*
* @author edwajohn
@ -28,6 +32,29 @@ public class While extends AbstractNode implements Statement {
} else {
statement.toCminus(builder, prefix + " ");
}
}
@Override
public MIPSResult toMIPS(StringBuilder code, StringBuilder data,
SymbolTable symbolTable,
RegisterAllocator regAllocator) {
String loopLabel = "while_truthy_" + SymbolTable.nextId();
String finishedLabel = "finished_while_" + SymbolTable.nextId();
code.append(String.format("%s:\n", loopLabel));
MIPSResult expressionTruthiness =
expression.toMIPS(code, data, symbolTable, regAllocator);
code.append(String.format("bne %s $zero %s\n",
expressionTruthiness.getRegister(),
finishedLabel));
MIPSResult inside = statement.toMIPS(code, data, symbolTable, regAllocator);
regAllocator.clear(inside.getRegister());
code.append(String.format("j %s\n", loopLabel))
.append(String.format("%s:\n", finishedLabel));
return MIPSResult.createVoidResult();
}
}

7
test.sh Executable file
View File

@ -0,0 +1,7 @@
#!/bin/zsh
# usage: ./test.sh <test-number>
javac -d classes -cp classes -cp *.jar **/*.java && java -cp "classes:antlr-4.9.1-complete.jar" main.Main data/test$1.c
java -jar data/examples/Mars4_5.jar data/test$1.asm