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package condense;
import cs132.vapor.ast.*;
import misc.*;
import java.util.*;
import java.util.regex.*;
public class CondenseVisitor extends VInstr.Visitor<RuntimeException>{
ArrayList<String> vaporm;
ArrayList<String> mips;
StackHelper curr;
public CondenseVisitor(VaporProgram vp, ArrayList<String> vaporm) {
this.vaporm = vaporm;
this.mips = new ArrayList<String>();
// preamble
this.mips.add(0, ".data");
this.addMIPS(".text");
this.addMIPS("jal Main");
this.addMIPS("li $v0 10");
this.addMIPS("syscall");
for (int i = 0; i < vp.functions.length; ++i) {
this.curr = new StackHelper(vp.functions[i].stack);
this.addMIPS(vp.functions[i].ident+":");
// prologue
this.addMIPS(" sw $fp -8($sp)");
this.addMIPS(" move $fp $sp");
this.addMIPS(String.format(" subu $sp $sp %d",
this.curr.getFrameSize()));
this.addMIPS(" sw $ra -4($fp)");
TreeSet<Node> f = this.sortFunction(vp.functions[i]);
MinimalLogger.info(String.format("Starting loop with function:\n %s",
f.toString()));
for (Node n : f) {
if (n instanceof VInstr) {
((VInstr) n).accept(this);
}
else
this.addMIPS(((VCodeLabel) n).ident + ":");
}
// epilogue
this.addMIPS(" lw $ra -4($fp)");
this.addMIPS(" lw $fp -8($fp)");
this.addMIPS(String.format(" addu $sp $sp %d",
this.curr.getFrameSize()));
this.addMIPS(" jr $ra");
}
this.addMIPS("_print:");
this.addMIPS(" li $v0 1 # syscall: print integer");
this.addMIPS(" syscall");
this.addMIPS(" la $a0 _newline");
this.addMIPS(" li $v0 4 # syscall: print string");
this.addMIPS(" syscall");
this.addMIPS(" jr $ra");
this.addMIPS("_error:");
this.addMIPS(" li $v0 4 # syscall: print string");
this.addMIPS(" syscall");
this.addMIPS(" li $v0 10 # syscall: exit");
this.addMIPS(" syscall");
this.addMIPS("_heapAlloc:");
this.addMIPS(" li $v0 9 # syscall: sbrk");
this.addMIPS(" syscall");
this.addMIPS(" jr $ra");
this.addMIPS(".data");
this.addMIPS(".align 0");
this.addMIPS("_newline: .asciiz \"\\n\"");
this.addMIPS("_str0: .asciiz \"null pointer\\n\"");
}
public ArrayList<String> getMIPS() {
return this.mips;
}
public void addMIPS(String str) {
MinimalLogger.info(String.format("Adding string:\n%s",
str));
this.mips.add(str);
}
public TreeSet<Node> sortFunction(VFunction f) {
TreeSet<Node> sort = new TreeSet<Node>((v1, v2) -> {
return Integer.compare(v1.sourcePos.line, v2.sourcePos.line);
});
for (VInstr s : f.body) {
sort.add(s);
}
for (VCodeLabel l : f.labels) {
sort.add(l);
}
return sort;
}
public static boolean isNumeric(String strNum) {
if (strNum == null) {
return false;
}
try {
double d = Double.parseDouble(strNum);
} catch (NumberFormatException nfe) {
return false;
}
return true;
}
public void visit(VAssign n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
this.addMIPS(String.format(" move $%s %s",
((VVarRef.Register) n.dest).ident,
n.source.toString()));
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VCall n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
this.addMIPS(String.format(" jal %s",
n.addr.toString().substring(1)));
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VBuiltIn n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
// treat the arguments (place all in temp registers)
String[] ts = new String[] { "$a0", "$t9"};
for (int i = 0; i < n.args.length; ++i) {
if (this.isNumeric(n.args[i].toString()))
this.addMIPS(String.format(" li %s %s",
ts[i],
n.args[i].toString()));
else
this.addMIPS(String.format(" move %s %s",
ts[i],
n.args[i].toString()));
}
boolean done = false;
String ret = "";
String op = ((VBuiltIn.Op) n.op).name;
if (op.equals("Add"))
ret += " add";
else if (op.equals("Sub"))
ret += " sub";
else if (op.equals("MulS"))
ret += " mul";
else if (op.equals("Eq"))
ret += "NULL"; // fixme
else if (op.equals("Lt"))
;
else if (op.equals("LtS"))
ret += " slti";
else if (op.equals("PrintIntS"))
ret += " jal _print";
else if (op.equals("HeapAllocZ")) {
this.addMIPS(" jal _heapAlloc");
if (n.dest != null)
this.addMIPS(String.format(" move $%s $v0",
((VVarRef.Register) n.dest).ident));
done = true;
}
else if (op.equals("Error"))
ret += " la $a0 _str0\n j _error";
if (!done) {
if (n.dest != null)
ret += String.format(" $%s",
((VVarRef.Register) n.dest).ident);
for (int i = 0; i < n.args.length; ++i)
ret += String.format(" %s",
ts[i]);
this.addMIPS(ret);
}
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VMemWrite n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
String source = n.source.toString();
String dest;
if (n.dest instanceof VMemRef.Stack)
dest = this.curr.get(((VMemRef.Stack) n.dest));
else
dest = String.format("0(%s)",
((VMemRef.Global) n.dest).base.toString());
if (source.contains(":")) {
this.addMIPS(String.format(" la $t9 %s",
source.substring(1)));
source = "$t9";
}
this.addMIPS(String.format(" sw %s %s",
source,
dest));
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VMemRead n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
String dest = n.dest.toString();
String source;
if (n.source instanceof VMemRef.Stack)
source = this.curr.get(((VMemRef.Stack) n.source));
else
source = ((VMemRef.Global) n.source).base.toString();
this.addMIPS(String.format(" lw %s %s",
dest,
source));
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VBranch n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
String ret = " ";
if (n.positive)
ret += "bnez ";
else
ret += "beqz ";
ret += n.value.toString()
+ " :";
ret += n.target.ident;
this.addMIPS(ret);
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VGoto n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
public void visit(VReturn n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (%s)",
n.getClass().getSimpleName(),
n.sourcePos.toString()));
}
}
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