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import java.io.*;
import java.util.ArrayList;
import cs132.util.ProblemException;
import cs132.vapor.parser.VaporParser;
import cs132.vapor.ast.VaporProgram;
import cs132.vapor.ast.VBuiltIn.Op;
import cs132.vapor.ast.VDataSegment;
import cs132.vapor.ast.VFunction;
import cs132.vapor.ast.VInstr;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.util.Arrays;
import cfg.*;
import misc.*;
import vaporize.*;
public class V2VM {
public static void main(String[] args) {
try {
byte[] bytes = readAllBytes(System.in);
InputStream is1 = new ByteArrayInputStream(bytes);
InputStream is2 = new ByteArrayInputStream(bytes);
InputStream systemInCopy = createCopyOfSystemIn();
ArrayList<String> strProg = inputStreamToArrayList(is1);
VaporProgram prog = parseVapor(is2, System.out);
MinimalLogger.info(String.format("Generating Intervals..."));
LIRVisitor lv = new LIRVisitor(prog, strProg);
ArrayList<LIRDict> lvs = lv.getLIRs();
for (LIRDict interval : lvs) {
MinimalLogger.info(String.format("Starting Linear Allocation for %s...",
interval.getFunction()));
new RegisterAlloc(interval, Arrays.copyOfRange(prog.registers, 9, 22)); // spill registers: t0, t1, t2
}
MinimalLogger.info("Removing extraneous lines from the program representation...");
for (String line : new ArrayList<String>(strProg)) {
// delete all lines not a function table!
if (!line.trim().startsWith("const") && !line.trim().startsWith(":"))
strProg.remove(line);
}
MinimalLogger.info(String.format("New program: %s",
strProg.toString()));
VaporizeVisitor vv = new VaporizeVisitor(prog, strProg, lvs);
System.out.println(String.join("\n", vv.getVaporm()));
} catch (IOException e) {
System.out.println(e.toString());
System.exit(1);
}
}
public static VaporProgram parseVapor(InputStream in, PrintStream err) throws IOException {
Op[] ops = {
Op.Add, Op.Sub, Op.MulS, Op.Eq, Op.Lt, Op.LtS,
Op.PrintIntS, Op.HeapAllocZ, Op.Error,
};
boolean allowLocals = true;
String[] registers = {
"$v0", "$v1",
"$a0", "$a1", "$a2", "$a3",
"$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7",
"$s0", "$s1", "$s2", "$s3", "$s4", "$s5", "$s6", "$s7",
"$t8",
};
boolean allowStack = false;
VaporProgram program;
try {
program = VaporParser.run(new InputStreamReader(in), 1, 1,
java.util.Arrays.asList(ops),
allowLocals, registers, allowStack);
} catch (ProblemException ex) {
err.println(ex.getMessage());
return null;
}
return program;
}
public static ArrayList<String> inputStreamToArrayList(InputStream inputStream) {
ArrayList<String> lines = new ArrayList<>();
try (BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream))) {
String line;
while ((line = reader.readLine()) != null) {
lines.add(line);
}
} catch (IOException e) {
e.printStackTrace();
}
return lines;
}
public static byte[] readAllBytes(InputStream inputStream) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[1024];
while ((nRead = inputStream.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
return buffer.toByteArray();
}
private static InputStream createCopyOfSystemIn() {
byte[] buffer = new byte[1024];
int bytesRead;
ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
try {
bytesRead = System.in.read(buffer);
bais = new ByteArrayInputStream(buffer, 0, bytesRead);
} catch (IOException e) {
e.printStackTrace();
}
return bais;
}
}
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