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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,202 @@ | ||
| package codegen | ||
|
|
||
| import ir.* | ||
| import org.objectweb.asm.ClassWriter | ||
| import org.objectweb.asm.Label | ||
| import org.objectweb.asm.MethodVisitor | ||
| import org.objectweb.asm.Opcodes.* | ||
| import org.objectweb.asm.Type.* | ||
| import type.* | ||
| import java.io.OutputStream | ||
| import java.lang.RuntimeException | ||
|
|
||
| class JVMCodeGenerator(val out: OutputStream) : CodeGenerator { | ||
| private val cw = ClassWriter(ClassWriter.COMPUTE_FRAMES) | ||
|
|
||
| override fun generate(program: IRProgram) { | ||
| cw.visit( | ||
| V1_6, | ||
| ACC_PUBLIC, | ||
| "ULMain", | ||
| null, | ||
| getInternalName(Object::class.java), | ||
| emptyArray() | ||
| ) | ||
| val constructor = cw.visitMethod( | ||
| ACC_PRIVATE, "<init>", "()V", null, null | ||
| ) | ||
| constructor.visitCode() | ||
| constructor.visitVarInsn(ALOAD, 0) | ||
| constructor.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false) | ||
| constructor.visitInsn(RETURN) | ||
| constructor.visitMaxs(1, 1) | ||
| constructor.visitEnd() | ||
|
|
||
| val main = cw.visitMethod( | ||
| ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null | ||
| ) | ||
| main.visitCode() | ||
| main.visitMethodInsn(INVOKESTATIC, "ULMain", "main", "()V", false) | ||
| main.visitInsn(RETURN) | ||
| main.visitMaxs(1, 1) | ||
| main.visitEnd() | ||
|
|
||
| program.functions.filter { it.name in arrayOf("main", "populateCharTable") }.forEach(this::generateFunction) | ||
| cw.visitEnd() | ||
| out.write(cw.toByteArray()) | ||
| out.close() | ||
| } | ||
|
|
||
| private fun generateFunction(func: IRFunction) { | ||
| val (rType, pTypes) = func.signature | ||
| val mv = cw.visitMethod( | ||
| ACC_PRIVATE or ACC_STATIC, | ||
| func.name, | ||
| "(${pTypes.joinToString("") { it.toJVMStr() }})${rType.toJVMStr()}", | ||
| null, | ||
| null | ||
| ) | ||
| func.temporaries.params.forEach { | ||
| mv.visitParameter(it.name, 0) | ||
| } | ||
| mv.visitCode() | ||
| val start = Label() | ||
| val end = Label() | ||
| mv.visitLabel(start) | ||
| func.temporaries.locals.forEach { | ||
| mv.visitLocalVariable(it.name, it.type.toJVMStr(), null, start, end, it.id) | ||
| } | ||
| func.temporaries.temps.forEach { | ||
| mv.visitLocalVariable("T${it.id}", it.type.toJVMStr(), null, start, end, it.id) | ||
| } | ||
| func.instructions.forEach { | ||
| when (it) { | ||
| is IRLoadImmediate<*> -> { | ||
| mv.visitLdcInsn(it.value) | ||
| val (loadOp, storeOp) = when (it.tmp.type) { | ||
| IntegerType, CharType -> Pair(ILOAD, ISTORE) | ||
| FloatType -> Pair(FLOAD, FSTORE) | ||
| else -> Pair(ALOAD, ASTORE) | ||
| } | ||
| System.err.println(it.tmp.type) | ||
| mv.visitVarInsn(storeOp, it.tmp.id) | ||
| // mv.visitVarInsn(ISTORE, it.tmp.id) | ||
| } | ||
| is IRInitArray -> { | ||
| val aType = it.tmp.type as ArrayType | ||
| mv.visitLdcInsn(aType.size) | ||
| mv.visitIntInsn(NEWARRAY, aType.elementType.toJVMInt()) | ||
| mv.visitVarInsn(ASTORE, it.tmp.id) | ||
| } | ||
| // is IRFunctionCall -> TODO() | ||
| // is IRArrayReference -> TODO() | ||
| is IRBinaryOp -> { | ||
| val (loadOp, storeOp) = when (it.lhs.type) { | ||
| IntegerType -> Pair(ILOAD, ISTORE) | ||
| FloatType -> Pair(FLOAD, FSTORE) | ||
| else -> Pair(0, 0) | ||
| } | ||
| val (addOp, subOp, mulOp) = when (it.lhs.type) { | ||
| IntegerType -> Triple(IADD, ISUB, IMUL) | ||
| FloatType -> Triple(FADD, FSUB, FMUL) | ||
| else -> Triple(0, 0, 0) | ||
| } | ||
| if (it.lhs.type in arrayOf(IntegerType, FloatType)) { | ||
| System.err.println("${it.lhs.id} ${it.rhs.id}") | ||
| when (it.operator) { | ||
| IRBinOp.ADD -> { | ||
| mv.visitVarInsn(loadOp, it.lhs.id) | ||
| mv.visitVarInsn(loadOp, it.rhs.id) | ||
| mv.visitInsn(addOp) | ||
| mv.visitVarInsn(storeOp, it.res.id) | ||
| } | ||
| IRBinOp.SUBTRACT -> { | ||
| mv.visitVarInsn(loadOp, it.lhs.id) | ||
| mv.visitVarInsn(loadOp, it.rhs.id) | ||
| mv.visitInsn(subOp) | ||
| mv.visitVarInsn(storeOp, it.res.id) | ||
| } | ||
| IRBinOp.MULTIPLY -> { | ||
| mv.visitVarInsn(loadOp, it.lhs.id) | ||
| mv.visitVarInsn(loadOp, it.rhs.id) | ||
| mv.visitInsn(mulOp) | ||
| mv.visitVarInsn(storeOp, it.res.id) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| // is IRUnaryOp -> TODO() | ||
| is IRAssignment -> if (it.index != null) { | ||
| val (loadOp, storeOp) = when (it.src.type) { | ||
| IntegerType -> Pair(ILOAD, IASTORE) | ||
| FloatType -> Pair(FLOAD, FASTORE) | ||
| CharType -> Pair(ILOAD, CASTORE) | ||
| else -> Pair(0, 0) | ||
| } | ||
| System.err.println(it) | ||
| // mv.visitVarInsn(ALOAD, 0) | ||
| // mv.visitVarInsn(ILOAD, it.index.id) | ||
| // mv.visitVarInsn(loadOp, it.src.id) | ||
| // mv.visitVarInsn(ALOAD, it.dest.id) | ||
| // mv.visitVarInsn(ILOAD, it.index.id) | ||
| // mv.visitVarInsn(loadOp, it.src.id) | ||
| // mv.visitInsn(storeOp) | ||
| } else { | ||
| val (loadOp, storeOp) = when (it.dest.type) { | ||
| IntegerType -> Pair(ILOAD, ISTORE) | ||
| FloatType -> Pair(FLOAD, FSTORE) | ||
| else -> Pair(0, 0) | ||
| } | ||
| mv.visitVarInsn(loadOp, it.src.id) | ||
| mv.visitVarInsn(storeOp, it.dest.id) | ||
| } | ||
| // is IRReturn -> TODO() | ||
| // is IRLabel -> TODO() | ||
| // is IRJump -> TODO() | ||
| // is IRConditionalJump -> TODO() | ||
| is IRPrintln -> { | ||
| mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;") | ||
| val (loadOp, storeOp) = when (it.type) { | ||
| IntegerType -> Pair(ILOAD, ISTORE) | ||
| FloatType -> Pair(FLOAD, FSTORE) | ||
| else -> Pair(ALOAD, ASTORE) | ||
| } | ||
| mv.visitVarInsn(loadOp, it.value.id) | ||
| mv.visitMethodInsn( | ||
| INVOKEVIRTUAL, | ||
| "java/io/PrintStream", "println", "(${it.type.toJVMStr()})V", false | ||
| ) | ||
| } | ||
| // is IRPrint -> TODO() | ||
| } | ||
|
|
||
| } | ||
| mv.visitLabel(end) | ||
| mv.visitInsn(RETURN) | ||
| mv.visitMaxs(1000, 100) | ||
| mv.visitEnd() | ||
| } | ||
|
|
||
| private fun generateVariable(temp: Temporary, mv: MethodVisitor) { | ||
| // mv.visitVa | ||
| } | ||
|
|
||
| private fun Type.toJVMInt(): Int = when (this) { | ||
| CharType -> T_CHAR | ||
| IntegerType -> T_INT | ||
| BooleanType -> T_BOOLEAN | ||
| FloatType -> T_FLOAT | ||
| else -> throw NotImplementedError() | ||
| } | ||
|
|
||
| private fun Type.toJVMStr(): String = when (this) { | ||
| is ArrayType -> "[${elementType.toJVMStr()}" | ||
| CharType -> "C" | ||
| IntegerType -> "I" | ||
| BooleanType -> "Z" | ||
| FloatType -> "F" | ||
| StringType -> "Ljava/lang/String;" | ||
| VoidType -> "V" | ||
| is FunctionType -> throw NotImplementedError() | ||
| } | ||
| } |
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