public JSSA(Type.Class c, DataInput in, ConstantPool cp) throws IOException {
super(c, in, cp);
- local = new Expr[maxLocals];
- stack = new Expr[maxStack];
- for(int i=0; i<this.method.getNumArgs(); i++)
- local[i] = new Argument("arg"+i, this.method.getArgType(i));
+ sp = 0;
+ stacks = new Phi[size()][];
+ locals = new Phi[size()][];
for(int i=0; i<size(); i++) {
- int op = get(i);
- Object arg = getArg(i);
- Object o = addOp(op, arg);
- if (o != null) {
- ops[numOps] = o;
- ofs[numOps++] = i;
+ int n = 0;
+ locals[i] = new Phi[maxLocals];
+ for(int j=0; j<locals[i].length; j++) locals[i][j] = new Phi();
+ if (i==0) {
+ if (!isStatic()) locals[i][n++].merge(new Argument("this",method.getDeclaringClass()));
+ for(int j=0;j<this.method.getNumArgs(); j++) locals[i][n++].merge(new Argument("arg"+j,this.method.getArgType(j)));
}
}
- }
- public void debugBodyToString(StringBuffer sb) {
- StringBuffer sb0 = new StringBuffer();
- super.debugBodyToString(sb0);
- StringTokenizer st = new StringTokenizer(sb0.toString(), "\n");
- String[] lines = new String[st.countTokens()];
- for(int i=0; i<lines.length; i++) lines[i] = st.nextToken();
- for(int j=0; j<ofs[0]; j++) {
- String s = " /* " + lines[j].trim();
- while(s.length() < 50) s += " ";
- s += " */";
- sb.append(s);
- sb.append("\n");
- }
- for(int i=0; i<numOps; i++) {
- String s = " /* " + lines[ofs[i]].trim();
- while(s.length() < 50) s += " ";
- s += " */ ";
- s += ops[i].toString();
- sb.append(s);
- sb.append(";\n");
- for(int j=ofs[i]+1; j<(i==numOps-1?size():ofs[i+1]); j++) {
- s = " /* " + lines[j].trim();
- while(s.length() < 50) s += " ";
- s += " */";
- sb.append(s);
- sb.append("\n");
+ stack = new Phi[maxStack];
+ branchTo(0);
+ for(pc=0; pc<size(); pc++) {
+ int op = get(pc);
+ Object arg = getArg(pc);
+ try {
+ Object o = addOp(op, arg);
+ if (o != null) {
+ ops[numOps] = o;
+ ofs[numOps++] = pc;
+ }
+ if (o==null || (!(o instanceof Branch))) branchTo(pc+1);
+ } catch(RuntimeException e) {
+ System.err.println("Had a problem at PC: " + pc + " of " + method);
+ e.printStackTrace();
+ throw new IOException("invalid class file");
}
}
}
+
+ public void branchTo(int newPC) {
+ if (stacks[newPC] == null) {
+ stacks[newPC] = new Phi[sp];
+ for(int i=0; i<sp; i++) stacks[newPC][i] = new Phi();
+ }
+ if (stacks[newPC].length != sp) throw new IllegalArgumentException("stack depth disagreement");
+ for(int i=0; i<stacks[newPC].length; i++) stacks[newPC][i].merge(stack[i]);
+ }
private Object[] ops = new Object[65535];
private int[] ofs = new int[65535];
// Instance Data; used ONLY during constructor; then thrown away /////////////////////////////////////////////////
/** this models the JVM locals; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
- private final Expr[] local;
+ private final Phi[][] locals;
/** this models the JVM stack; it is only used for unwinding stack-ops into an SSA-tree, then thrown away */
- private final Expr[] stack;
+ private final Phi[][] stacks;
+ private final Phi[] stack;
/** JVM stack pointer */
+ private int pc = 0;
private int sp = 0;
+
+ private void push(Expr e) {
+ if (e.getType() == Type.VOID) throw new IllegalArgumentException("can't push a void");
+ if (stack[sp] == null) stack[sp] = new Phi();
+ stack[sp++].merge(e);
+ }
+ private Expr pop() {
+ Expr ret = stack[sp-1];
+ stack[sp-1] = null;
+ sp--;
+ return ret;
+ }
- private Expr push(Expr e) { return stack[sp++] = e; }
- private Expr pop() { return stack[--sp]; }
+ private Op seqPush(Expr e) {
+ push(e);
+ return new Seq(e);
+ }
// SSA-node classes /////////////////////////////////////////////////////////////////////////////////////////
return name;
}
}
-
+
+ /** A sequence point. expr is evaluated for side effects at this point, this does not generate data
+ Expressions that haven't been evaluated with Seq are evaluated when they are first encountered
+ */
+ public class Seq extends Op {
+ private final Expr expr;
+ public String toString() { return expr.toString(); }
+ public Seq(Expr expr) { this.expr = expr; }
+ }
+
/** an operation which generates data */
public abstract class Expr extends Op {
//public abstract Expr[] contributors(); // not implemented yet
/** every JSSA.Expr either remembers its type _OR_ knows how to figure it out (the latter is preferred to eliminate
* redundant information that could possibly "disagree" with itself -- this happened a LOT in Soot) */
public abstract Type getType();
+ public String _toString() { return super.toString(); }
+ public String toString() {
+ String s = (String)bindingMap.get(this);
+ if (s != null) return s;
+ String prefix;
+ if (getType() == Type.VOID) return _toString();
+ else if (getType() == Type.DOUBLE || getType() == Type.FLOAT) prefix = "f";
+ else if (getType().isPrimitive()) prefix = "i";
+ else if (getType().isArray()) prefix = "a";
+ else prefix = "o";
+ s = prefix + (nextVar++);
+ bindingMap.put(this,s);
+ return "(" + s + " = " + _toString() + ")";
+ }
}
/**
- * A "nondeterministic merge" -- for example when the first instruction in a loop reads from a local which could have been
- * written to either by some instruction at the end of the previous iteration of the loop or by some instruction before
+ * A "nondeterministic merge" -- for example when the first
+ * instruction in a loop reads from a local which could have been
+ * written to either by some instruction at the end of the
+ * previous iteration of the loop or by some instruction before
* the loop (on the first iteration).
+ *
+ * Note that Phi's are *mutable*. This means that when one Phi
+ * holds a reference to another, updates to the referenced Phi
+ * are "seen" by the other Phi. This prevents us from having to
+ * repeat loops to propagate the Phis.
*/
public class Phi extends Expr {
- private final Expr[] inputs;
- public Phi(Expr[] inputs) {
- this.inputs = new Expr[inputs.length];
- System.arraycopy(inputs, 0, this.inputs, 0, inputs.length);
+ Expr[] inputs;
+ public Phi(Expr[] inputs) { this.inputs = inputs; }
+ public Phi() { this.inputs = new Expr[0]; }
+ public Phi(Expr e1) {
+ this.inputs = new Expr[1];
+ inputs[0] = e1;
+ }
+ public Phi(Expr e1, Expr e2) {
+ this.inputs = new Expr[2];
+ inputs[0] = e1;
+ inputs[1] = e2;
+ }
+ public void merge(Expr e) {
+ Expr[] newinputs = new Expr[inputs.length + 1];
+ System.arraycopy(inputs, 0, newinputs, 0, inputs.length);
+ newinputs[newinputs.length-1] = e;
+ inputs = newinputs;
+ }
+ public String toString() {
+ if (inputs.length == 1) return inputs[0].toString();
+ StringBuffer ret = new StringBuffer();
+ ret.append("{{ ");
+ for(int i=0; i<inputs.length; i++) {
+ ret.append(inputs[i].toString());
+ ret.append(" ");
+ }
+ ret.append("}}");
+ return ret.toString();
}
public Type getType() {
// sanity check
}
}
+ public Phi phi(Expr e) { return e instanceof Phi ? ((Phi)e) : new Phi(e); }
+
public class Argument extends Expr {
public final String name;
public final Type t;
public Argument(String name, Type t) { this.name = name; this.t = t; }
- public String toString() { return name; }
+ public String _toString() { return name; }
public Type getType() { return t; }
}
+
+ // Unary Operations //////////////////////////////////////////////////////////////////////////////
+
+ public class Not extends Expr {
+ public final Expr e;
+ public Not(Expr e) {
+ if (e.getType() != Type.BOOLEAN) throw new IllegalArgumentException("not needs a boolean expression");
+ this.e = e;
+ }
+ public Type getType() { return Type.BOOLEAN; }
+ public String _toString() { return "!(" + e + ")"; }
+ }
+
+ public class Neg extends Expr {
+ public final Expr e;
+ public Neg(Expr e) {
+ if (!e.getType().isPrimitive()) throw new IllegalArgumentException("can only negate a primitive");
+ this.e = e;
+ }
+ public Type getType() { return e.getType(); }
+ public String _toString() { return "- (" + e + ")"; }
+ }
+
+
// Binary Operations //////////////////////////////////////////////////////////////////////////////
public abstract class BinExpr extends Expr {
public final Expr e1;
public final Expr e2;
- public BinExpr(Expr e1, Expr e2) { this.e1 = e1; this.e2 = e2; }
- public String toString() {
- return name() + "("+e1+", "+e2+")";
+ private final String show;
+ public BinExpr(Expr e1, Expr e2, String show) { this.e1 = e1; this.e2 = e2; this.show = show; }
+ public String _toString() {
+ // FEATURE: should we be doing some precedence stuff here? probably not worth it for debugging output
+ return "(" + e1 + show + e2 + ")";
}
}
public class Comparison extends BinExpr {
- public Comparison(Expr e1, Expr e2) { super(e1, e2); }
+ public Comparison(Expr e1, Expr e2, String show) { super(e1, e2, show); }
public Type getType() { return Type.BOOLEAN; }
}
- public class Gt extends Comparison { public Gt(Expr e1, Expr e2) { super(e1, e2); } }
- public class Lt extends Comparison { public Lt(Expr e1, Expr e2) { super(e1, e2); } }
- public class Eq extends Comparison { public Eq(Expr e1, Expr e2) { super(e1, e2); } }
- public class Not extends Expr {
- public final Expr e;
- public Not(Expr e) { this.e = e; }
- public Type getType() { return Type.BOOLEAN; }
+
+ public class Eq extends Comparison {
+ public Eq(Expr e1, Expr e2) {
+ super(e1, e2, "==");
+ if (e1.getType().isPrimitive() != e2.getType().isPrimitive())
+ throw new IllegalArgumentException("type mismatch: " + e1.getType() + " and " + e2.getType());
+ if (e1.getType().isPrimitive() && e1.getType() != e2.getType())
+ throw new IllegalArgumentException("type mismatch: " + e1.getType() + " and " + e2.getType());
+ // FEATURE: Check if we can compare these classes
+ }
}
+
+
+ public class PrimitiveComparison extends Comparison {
+ public PrimitiveComparison(Expr e1, Expr e2, String show) {
+ super(e1, e2, show);
+ if (!e1.getType().isPrimitive() || e1.getType() != e2.getType()) throw new IllegalArgumentException("type mismatch");
+ }
+ }
+
+ public class Gt extends PrimitiveComparison { public Gt(Expr e1, Expr e2) { super(e1, e2, ">"); } }
+ public class Lt extends PrimitiveComparison { public Lt(Expr e1, Expr e2) { super(e1, e2, "<"); } }
+ public class Ge extends PrimitiveComparison { public Ge(Expr e1, Expr e2) { super(e1, e2, ">="); } }
+ public class Le extends PrimitiveComparison { public Le(Expr e1, Expr e2) { super(e1, e2, "<="); } }
+
+
// Math Operations //////////////////////////////////////////////////////////////////////////////
- public class Math extends BinExpr {
- private final String show;
- public Math(Expr e1, Expr e2, String show) { super(e2, e1); this.show = show; }
- public String toString() { return e1+" "+show+" "+e2; }
- public Type getType() {
+ public class BinMath extends BinExpr {
+ public BinMath(Expr e1, Expr e2, String show) {
+ super(e2, e1, show);
+ if (e1.getType() != e2.getType()) throw new IllegalArgumentException("types disagree");
+ }
+ public Type getType() { return e1.getType(); }
+ }
+
+ public class Add extends BinMath { public Add(Expr e, Expr e2) { super(e, e2, "+"); } }
+ public class Sub extends BinMath { public Sub(Expr e, Expr e2) { super(e, e2, "-"); } }
+ public class Mul extends BinMath { public Mul(Expr e, Expr e2) { super(e, e2, "*"); } }
+ public class Rem extends BinMath { public Rem(Expr e, Expr e2) { super(e, e2, "%"); } }
+ public class Div extends BinMath { public Div(Expr e, Expr e2) { super(e, e2, "/"); } }
+ public class And extends BinMath { public And(Expr e, Expr e2) { super(e, e2, "&"); } }
+ public class Or extends BinMath { public Or(Expr e, Expr e2) { super(e, e2, "|"); } }
+ public class Xor extends BinMath { public Xor(Expr e, Expr e2) { super(e, e2, "^"); } }
+
+ public class BitShiftExpr extends BinExpr {
+ public BitShiftExpr(Expr e1, Expr e2, String show) {
+ super(e1,e2,show);
Type t = e1.getType();
- if (t != e2.getType()) throw new Error("types disagree");
- return t;
+ if (t != Type.INT && t != Type.LONG) throw new IllegalArgumentException("type mismatch");
+ if (e2.getType() != Type.INT) throw new IllegalArgumentException("type mismatch");
}
+ public Type getType() { return e1.getType(); }
}
- public class Add extends Math { public Add(Expr e, Expr e2) { super(e, e2, "+"); } }
- public class Sub extends Math { public Sub(Expr e, Expr e2) { super(e, e2, "-"); } }
- public class Mul extends Math { public Mul(Expr e, Expr e2) { super(e, e2, "*"); } }
- public class Rem extends Math { public Rem(Expr e, Expr e2) { super(e, e2, "%"); } }
- //public class Neg extends Math { public Neg(Expr e) { super(e, "-"); } }
- public class Div extends Math { public Div(Expr e, Expr e2) { super(e, e2, "/"); } }
- public class Shl extends Math { public Shl(Expr e, Expr e2) { super(e, e2, "<<"); } }
- public class Shr extends Math { public Shr(Expr e, Expr e2) { super(e, e2, ">>"); } }
- public class Ushr extends Math { public Ushr(Expr e, Expr e2) { super(e, e2, ">>>"); } }
- public class And extends Math { public And(Expr e, Expr e2) { super(e, e2, "&"); } }
- public class Or extends Math { public Or(Expr e, Expr e2) { super(e, e2, "|"); } }
- public class Xor extends Math { public Xor(Expr e, Expr e2) { super(e, e2, "^"); } }
+ public class Shl extends BitShiftExpr { public Shl(Expr e, Expr e2) { super(e, e2, "<<"); } }
+ public class Shr extends BitShiftExpr { public Shr(Expr e, Expr e2) { super(e, e2, ">>"); } }
+ public class Ushr extends BitShiftExpr { public Ushr(Expr e, Expr e2) { super(e, e2, ">>>"); } }
+
// Other operations //////////////////////////////////////////////////////////////////////////////
final Expr e;
final Type t;
public Cast(Expr e, Type t) {
- if(e.getType().isRef() != t.isRef()) throw new IllegalArgumentException("invalid cast");
+ if (e.getType().isRef() != t.isRef()) throw new IllegalArgumentException("invalid cast");
// FEATURE: Check that one is a subclass of the other if it is a ref
this.e = e;
this.t = t;
final Expr e;
final Type.Ref t;
public InstanceOf(Expr e, Type.Ref t) {
- if(!e.getType().isRef()) throw new IllegalArgumentException("can't do an instanceof check on a non-ref");
+ if (!e.getType().isRef()) throw new IllegalArgumentException("can't do an instanceof check on a non-ref");
this.e = e;
this.t = t;
}
public Type getType() { return Type.BOOLEAN; }
}
- public class Throw extends Op {
+ public class Branch extends Op {
+ Expr destination = null;
+ Expr condition = null;
+ public Branch(Expr condition, Expr destination) { this(destination); this.condition = condition; }
+ public Branch(Expr destination) { this.destination = destination; }
+ public Branch(MethodGen.Switch s) { /* FIXME */ }
+ public Branch() { }
+ public void branchTo() { branchTo(destination); }
+ private void branchTo(Expr e) {
+ if (condition != null) JSSA.this.branchTo(pc+1);
+ if (e instanceof Phi) {
+ Phi phi = (Phi)e;
+ for(int i=0; i<phi.inputs.length; i++) branchTo(phi.inputs[i]);
+ } else if (e instanceof Label) {
+ JSSA.this.branchTo(((Label)e).pc);
+ } else {
+ throw new IllegalArgumentException("can't branch to a " + e.getClass());
+ }
+ }
+ }
+ public class Throw extends Branch {
public final Expr e;
public Throw(Expr e) {
- if(!e.getType().isRef()) throw new IllegalArgumentException("can't throw a non ref");
+ if (!e.getType().isRef()) throw new IllegalArgumentException("can't throw a non ref");
// FEATURE: CHeck that it is a subclass of Throwable
this.e = e;
}
}
-
- public class Branch extends Op {
- public Branch(Expr condition, Object destination) { }
- public Branch(Label destination) { }
- public Branch(MethodGen.Switch s) { }
- public Branch() { }
+ public class Return extends Branch {
+ final Expr e;
+ public Return() { this(VOID_EXPR); }
+ public Return(Expr e) {
+ this.e = e;
+ if (Type.unify(method.getReturnType(),e.getType()) != method.getReturnType())
+ throw new IllegalArgumentException("type mismatch");
+ }
+ public String toString() { return e.getType() == Type.VOID ? "return" : ("return "+e.toString()); }
}
public class Goto extends Branch { }
public class RET extends Branch { }
/** represents a "returnaddr" pushed onto the stack */
public class Label extends Expr {
- public final Op op;
+ public int pc;
+ public Label(int i) { this.pc = pc; }
public Type getType() { throw new Error("attempted to call getType() on a Label"); }
- public Label(Op op) { this.op = op; }
- public Label(int i) { this.op = null; /* FIXME */ }
}
public class New extends Expr {
public final Type.Class t;
public Type getType() { return t; }
public New(Type.Class t) { this.t = t; }
+ public String _toString() { return "new " + t + "()"; }
}
public class NewArray extends Expr {
public NewArray(Type.Array t, Expr[] dims) { this.t = t; this.dims = dims; }
public NewArray(Type.Array t, Expr dim) { this(t,new Expr[]{dim}); }
public Type getType() { return t; }
+ public String _toString() {
+ Type base = t;
+ int totalDims = 0;
+ while(base.isArray()) {
+ totalDims++;
+ base = base.asArray().getElementType();
+ }
+ StringBuffer sb = new StringBuffer("new " + base);
+ for(int i=0;i<totalDims;i++)
+ sb.append("[" + (i < dims.length ? dims[i].toString() : "") + "]");
+ return sb.toString();
+ }
}
- // FEATURE: Array stuff
-
- public class Return extends Op {
- final Expr e;
- public Return() { this(VOID_EXPR); }
- public Return(Expr e) { this.e = e; }
- public String toString() { return e.getType() == Type.VOID ? "return" : ("return "+e.toString()); }
- }
-
/** GETFIELD and GETSTATIC */
public class Get extends Expr {
final Type.Class.Field f;
public Type getType() { return f.getType(); }
public Get(Type.Class.Field f) { this(f, null); }
public Get(Type.Class.Field f, Expr e) { this.f = f; this.e = e; }
- public String toString() {
+ public String _toString() {
return
(e!=null
? e+"."+f.name
public class ArrayPut extends Op {
final Expr e, i, v;
- public ArrayPut(Expr e, Expr i, Expr v) { this.e = e; this.i = i; this.v = v; }
+ public ArrayPut(Expr v, Expr i, Expr e) { this.e = e; this.i = i; this.v = v; }
+ public String toString() { return e + "[" + i + "] := " + v; }
}
public class ArrayGet extends Expr {
final Expr e, i;
- public ArrayGet(Expr e, Expr i) { this.e = e; this.i = i; }
+ public ArrayGet(Expr i, Expr e) { this.e = e; this.i = i; }
public Type getType() { return e.getType().asArray().getElementType(); }
+ public String _toString() { return e + "[" + i + "]"; }
}
public class ArrayLength extends Expr {
sb.append(")");
}
- public String toString() {
+ public String _toString() {
StringBuffer sb = new StringBuffer();
sb.append(method.getDeclaringClass() == JSSA.this.method.getDeclaringClass()
? method.name
public class InvokeStatic extends Invoke { public InvokeStatic(Type.Class.Method m, Expr[] a) { super(m,a); } }
public class InvokeSpecial extends InvokeVirtual {
public InvokeSpecial(Type.Class.Method m, Expr[] a, Expr e) { super(m,a,e); }
- public String toString() {
- StringBuffer sb = new StringBuffer();
- sb.append(method.name.equals("<init>") ? "super" : method.name);
- args(sb);
- return sb.toString();
- }
+ public String _toString() { return _toString(method.name.equals("<init>")
+ ? method.getDeclaringClass().getName()
+ : method.name); }
}
- public class InvokeInterface extends InvokeVirtual{public InvokeInterface(Type.Class.Method m, Expr[] a, Expr e){super(m,a,e);}}
+ public class InvokeInterface extends InvokeVirtual{
+ public InvokeInterface(Type.Class.Method m, Expr[] a, Expr e) { super(m,a,e); } }
public class InvokeVirtual extends Invoke {
public final Expr instance;
public InvokeVirtual(Type.Class.Method m, Expr[] a, Expr e) { super(m, a); instance = e; }
- public String toString() {
+ public String _toString() { return _toString(method.name); }
+ protected String _toString(String name) {
StringBuffer sb = new StringBuffer();
- sb.append(method.name);
+ sb.append(instance+".");
+ sb.append(name);
args(sb);
return sb.toString();
}
private final Object o;
public Constant(int i) { this(new Integer(i)); }
public Constant(Object o) { this.o = o; }
- public String toString() { return o.toString(); }
+ public String toString() { return o == null ? "null" : o instanceof String ? "\"" + o + "\"" : o.toString(); }
public Type getType() {
+ if (o == null) return Type.NULL;
if (o instanceof Byte) return Type.BYTE;
if (o instanceof Short) return Type.SHORT;
if (o instanceof Character) return Type.CHAR;
if (o instanceof Long) return Type.LONG;
if (o instanceof Double) return Type.DOUBLE;
if (o instanceof Float) return Type.FLOAT;
- if (o instanceof ConstantPool.Ent) throw new Error("unimplemented");
- throw new Error("this should not happen");
+ if (o instanceof Integer) return Type.INT;
+ if (o instanceof String) return Type.STRING;
+ throw new IllegalStateException("unknown constant type");
}
}
i1 = p.i1;
i2 = p.i2;
}
+ Label label = (arg instanceof Label) ? (Label)arg : null;
switch(op) {
case NOP: return null;
// Stack manipulations //////////////////////////////////////////////////////////////////////////////
- case ACONST_NULL: return stack[sp++] = new Constant(null);
- case ICONST_M1: return stack[sp++] = new Constant(-1);
- case ICONST_0: case LCONST_0: case FCONST_0: case DCONST_0: push(new Constant(0)); return null;
- case ICONST_1: case LCONST_1: case FCONST_1: case DCONST_1: push(new Constant(1)); return null;
- case ICONST_2: case FCONST_2: push(new Constant(2)); return null;
- case ICONST_3: push(new Constant(3)); return null;
- case ICONST_4: push(new Constant(4)); return null;
- case ICONST_5: push(new Constant(5)); return null;
- case ILOAD: case LLOAD: case FLOAD: case DLOAD: case ALOAD: return push(local[i1]);
- case ILOAD_0: case LLOAD_0: case FLOAD_0: case DLOAD_0: case ALOAD_0: return push(local[0]);
- case ILOAD_1: case LLOAD_1: case FLOAD_1: case DLOAD_1: case ALOAD_1: return push(local[1]);
- case ALOAD_2: case DLOAD_2: case FLOAD_2: case LLOAD_2: case ILOAD_2: return push(local[2]);
- case ILOAD_3: case LLOAD_3: case FLOAD_3: case DLOAD_3: case ALOAD_3: return push(local[3]);
- case ISTORE: case LSTORE: case FSTORE: case DSTORE: case ASTORE: local[i1] = pop(); return null;
- case ISTORE_0: case LSTORE_0: case FSTORE_0: case DSTORE_0: case ASTORE_0: local[0] = pop(); return null;
- case ISTORE_1: case LSTORE_1: case FSTORE_1: case DSTORE_1: case ASTORE_1: local[1] = pop(); return null;
- case ASTORE_2: case DSTORE_2: case FSTORE_2: case LSTORE_2: case ISTORE_2: local[2] = pop(); return null;
- case ISTORE_3: case LSTORE_3: case FSTORE_3: case DSTORE_3: case ASTORE_3: local[3] = pop(); return null;
- case POP: stack[--sp] = null;
- case POP2: stack[--sp] = null; stack[--sp] = null; /** fixme: pops a WORD, not an item */
- case DUP: stack[sp] = stack[sp-1]; sp++;
- case DUP2: stack[sp] = stack[sp-2]; stack[sp+1] = stack[sp-1]; sp+=2;
+ case ACONST_NULL: push(new Constant(null)); return null;
+ case ICONST_M1: push(new Constant(-1)); return null;
+ case ICONST_0: case LCONST_0: case FCONST_0: case DCONST_0: push(new Constant(0)); return null;
+ case ICONST_1: case LCONST_1: case FCONST_1: case DCONST_1: push(new Constant(1)); return null;
+ case ICONST_2: case FCONST_2: push(new Constant(2)); return null;
+ case ICONST_3: push(new Constant(3)); return null;
+ case ICONST_4: push(new Constant(4)); return null;
+ case ICONST_5: push(new Constant(5)); return null;
+ case ILOAD: case LLOAD: case FLOAD: case DLOAD: case ALOAD: push(locals[pc][i1]); return null;
+ case ILOAD_0: case LLOAD_0: case FLOAD_0: case DLOAD_0: case ALOAD_0: push(locals[pc][0]); return null;
+ case ILOAD_1: case LLOAD_1: case FLOAD_1: case DLOAD_1: case ALOAD_1: push(locals[pc][1]); return null;
+ case ALOAD_2: case DLOAD_2: case FLOAD_2: case LLOAD_2: case ILOAD_2: push(locals[pc][2]); return null;
+ case ILOAD_3: case LLOAD_3: case FLOAD_3: case DLOAD_3: case ALOAD_3: push(locals[pc][3]); return null;
+ case ISTORE: case LSTORE: case FSTORE: case DSTORE: case ASTORE:
+ locals[pc+1][i1].merge(pop()); return null;
+ case ISTORE_0: case LSTORE_0: case FSTORE_0: case DSTORE_0: case ASTORE_0:
+ locals[pc+1][0].merge(pop()); return null;
+ case ISTORE_1: case LSTORE_1: case FSTORE_1: case DSTORE_1: case ASTORE_1:
+ locals[pc+1][1].merge(pop()); return null;
+ case ASTORE_2: case DSTORE_2: case FSTORE_2: case LSTORE_2: case ISTORE_2:
+ locals[pc+1][2].merge(pop()); return null;
+ case ISTORE_3: case LSTORE_3: case FSTORE_3: case DSTORE_3: case ASTORE_3:
+ locals[pc+1][3].merge(pop()); return null;
+ case POP: pop(); return null;
+ case POP2: pop(); pop(); return null;
+ case DUP: push(stack[sp-1]); return null;
+ case DUP2: push(stack[sp-2]); push(stack[sp-1]); return null;
// Conversions //////////////////////////////////////////////////////////////////////////////
// Math //////////////////////////////////////////////////////////////////////////////
- case IADD: case LADD: case FADD: case DADD: push(new Add(pop(), pop())); return null;
- case ISUB: case LSUB: case FSUB: case DSUB: push(new Sub(pop(), pop())); return null;
- case IMUL: case LMUL: case FMUL: case DMUL: push(new Mul(pop(), pop())); return null;
- case IREM: case LREM: case FREM: case DREM: push(new Rem(pop(), pop())); return null;
- //case INEG: case LNEG: case FNEG: case DNEG: push(new Neg(pop())); return null;
- case IDIV: case LDIV: case FDIV: case DDIV: push(new Div(pop(), pop())); return null;
- case ISHL: case LSHL: push(new Shl(pop(), pop())); return null;
- case ISHR: case LSHR: push(new Shr(pop(), pop())); return null;
+ case IADD: case LADD: case FADD: case DADD: push(new Add(pop(), pop())); return null;
+ case ISUB: case LSUB: case FSUB: case DSUB: push(new Sub(pop(), pop())); return null;
+ case IMUL: case LMUL: case FMUL: case DMUL: push(new Mul(pop(), pop())); return null;
+ case IREM: case LREM: case FREM: case DREM: push(new Rem(pop(), pop())); return null;
+ case INEG: case LNEG: case FNEG: case DNEG: push(new Neg(pop())); return null;
+ case IDIV: case LDIV: case FDIV: case DDIV: push(new Div(pop(), pop())); return null;
+ case ISHL: case LSHL: push(new Shl(pop(), pop())); return null;
+ case ISHR: case LSHR: push(new Shr(pop(), pop())); return null;
case IUSHR: case LUSHR: push(new Ushr(pop(), pop())); return null;
- case IAND: case LAND: push(new And(pop(), pop())); return null;
- case IOR: case LOR: push(new Or(pop(), pop())); return null;
- case IXOR: case LXOR: push(new Xor(pop(), pop())); return null;
- case IINC: return local[i1] = new Add(local[i1], new Constant(i2));
+ case IAND: case LAND: push(new And(pop(), pop())); return null;
+ case IOR: case LOR: push(new Or(pop(), pop())); return null;
+ case IXOR: case LXOR: push(new Xor(pop(), pop())); return null;
+ case IINC: return locals[pc+1][i1] = phi(new Add(locals[pc][i1], new Constant(i2)));
// Control and branching //////////////////////////////////////////////////////////////////////////////
case IFNULL: return new Branch(new Eq(pop(), new Constant(null)), new Label(i1));
case IFNONNULL: return new Branch(new Not(new Eq(pop(),new Constant(null))),new Label(i1));
- case IFEQ: return new Branch( new Eq(new Constant(0), pop()), arg);
- case IFNE: return new Branch(new Not(new Eq(new Constant(0), pop())), arg);
- case IFLT: return new Branch( new Lt(new Constant(0), pop()), arg);
- case IFGE: return new Branch(new Not(new Lt(new Constant(0), pop())), arg);
- case IFGT: return new Branch( new Gt(new Constant(0), pop()), arg);
- case IFLE: return new Branch(new Not(new Gt(new Constant(0), pop())), arg);
- case IF_ICMPEQ: return new Branch( new Eq(pop(), pop()), arg);
- case IF_ICMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
- case IF_ICMPLT: return new Branch( new Lt(pop(), pop()), arg);
- case IF_ICMPGE: return new Branch(new Not(new Lt(pop(), pop())), arg);
- case IF_ICMPGT: return new Branch( new Gt(pop(), pop()), arg);
- case IF_ICMPLE: return new Branch(new Not(new Gt(pop(), pop())), arg);
- case IF_ACMPEQ: return new Branch( new Eq(pop(), pop()), arg);
- case IF_ACMPNE: return new Branch(new Not(new Eq(pop(), pop())), arg);
- case ATHROW: return new Throw(pop());
- case GOTO: return new Branch(new Label(i1));
- case JSR: return new JSR(new Label(i1));
- case RET: return new RET();
- case RETURN: return new Return();
+ case IFEQ: return new Branch( new Eq(new Constant(0), pop()), label);
+ case IFNE: return new Branch(new Not(new Eq(new Constant(0), pop())), label);
+ case IFLT: return new Branch( new Lt(new Constant(0), pop()), label);
+ case IFGE: return new Branch(new Not(new Lt(new Constant(0), pop())), label);
+ case IFGT: return new Branch( new Gt(new Constant(0), pop()), label);
+ case IFLE: return new Branch(new Not(new Gt(new Constant(0), pop())), label);
+ case IF_ICMPEQ: return new Branch( new Eq(pop(), pop()), label);
+ case IF_ICMPNE: return new Branch(new Not(new Eq(pop(), pop())), label);
+ case IF_ICMPLT: return new Branch( new Lt(pop(), pop()), label);
+ case IF_ICMPGE: return new Branch(new Not(new Lt(pop(), pop())), label);
+ case IF_ICMPGT: return new Branch( new Gt(pop(), pop()), label);
+ case IF_ICMPLE: return new Branch(new Not(new Gt(pop(), pop())), label);
+ case IF_ACMPEQ: return new Branch( new Eq(pop(), pop()), label);
+ case IF_ACMPNE: return new Branch(new Not(new Eq(pop(), pop())), label);
+ case ATHROW: return new Throw(pop());
+ case GOTO: return new Branch(locals[pc][i1]);
+ case JSR: push(new Label(pc+3)); return new JSR(new Label(pc+i1));
+ case RET: return new RET();
+ case RETURN: return new Return();
case IRETURN: case LRETURN: case FRETURN: case DRETURN: case ARETURN:
return new Return(pop());
// Array manipulations //////////////////////////////////////////////////////////////////////////////
case IALOAD: case LALOAD: case FALOAD: case DALOAD: case AALOAD:
- case BALOAD: case CALOAD: case SALOAD: push(new ArrayGet(pop(), pop())); return null;
+ case BALOAD: case CALOAD: case SALOAD:
+ return seqPush(new ArrayGet(pop(), pop()));
case IASTORE: case LASTORE: case FASTORE: case DASTORE: case AASTORE:
- case BASTORE: case CASTORE: case SASTORE: return new ArrayPut(pop(), pop(), pop());
+ case BASTORE: case CASTORE: case SASTORE:
+ return new ArrayPut(pop(), pop(), pop());
// Invocation //////////////////////////////////////////////////////////////////////////////
Type.Class.Method method = (Type.Class.Method)arg;
Expr args[] = new Expr[method.getNumArgs()];
for(int i=0; i<args.length; i++) args[args.length-i-1] = pop();
+ Expr ret;
switch(op) {
- case INVOKEVIRTUAL: return push(new InvokeVirtual(method, args, pop()));
- case INVOKEINTERFACE: return push(new InvokeInterface(method, args, pop()));
- case INVOKESPECIAL: return push(new InvokeSpecial(method, args, pop()));
- case INVOKESTATIC: return push(new InvokeStatic(method, args));
+ case INVOKEVIRTUAL: ret = new InvokeVirtual(method, args, pop()); break;
+ case INVOKEINTERFACE: ret = new InvokeInterface(method, args, pop()); break;
+ case INVOKESPECIAL: ret = new InvokeSpecial(method, args, pop()); break;
+ case INVOKESTATIC: ret = new InvokeStatic(method, args); break;
+ default: throw new Error("should never happen");
}
+ if (ret.getType() != Type.VOID) push(ret);
+ return new Seq(ret);
}
// Field Access //////////////////////////////////////////////////////////////////////////////
- case GETSTATIC: push(new Get((Type.Class.Field)arg, null)); return null;
+ case GETSTATIC: return seqPush(new Get((Type.Class.Field)arg, null));
case PUTSTATIC: return new Put((Type.Class.Field)arg, pop(), null);
- case GETFIELD: push(new Get((Type.Class.Field)arg, pop())); return null;
+ case GETFIELD: return seqPush(new Get((Type.Class.Field)arg, pop()));
case PUTFIELD: return new Put((Type.Class.Field)arg, pop(), pop());
// Allocation //////////////////////////////////////////////////////////////////////////////
case NEW: push(new New((Type.Class)arg)); return null;
- case NEWARRAY: {
- Type base;
- switch(((Integer)arg).intValue()) {
- case 4: base = Type.BOOLEAN; break;
- case 5: base = Type.CHAR; break;
- case 6: base = Type.FLOAT; break;
- case 7: base = Type.DOUBLE; break;
- case 8: base = Type.BYTE; break;
- case 9: base = Type.SHORT; break;
- case 10: base = Type.INT; break;
- case 11: base = Type.LONG; break;
- default: throw new IllegalStateException("invalid array type");
- }
- push(new NewArray(base.makeArray(),pop()));
- return null;
- }
+ case NEWARRAY: return seqPush(new NewArray(Type.fromArraySpec(((Integer)arg).intValue()).makeArray(), pop()));
case ANEWARRAY: push(new NewArray(((Type.Ref)arg).makeArray(), pop())); return null;
case MULTIANEWARRAY: {
MethodGen.MultiANewArray mana = (MethodGen.MultiANewArray) arg;
Expr[] dims = new Expr[mana.dims];
for(int i=0;i<dims.length;i++) dims[i] = pop();
- push(new NewArray(mana.type, dims));
- return null;
+ return seqPush(new NewArray(mana.type, dims));
}
- case ARRAYLENGTH: push(new ArrayLength(pop())); return null;
+ case ARRAYLENGTH: return seqPush(new ArrayLength(pop()));
// Runtime Type information //////////////////////////////////////////////////////////////////////////////
- case CHECKCAST: push(new Cast(pop(), (Type.Ref)arg)); return null;
+ case CHECKCAST: return seqPush(new Cast(pop(), (Type.Ref)arg));
case INSTANCEOF: push(new InstanceOf(pop(), (Type.Ref)arg)); return null;
case LDC: case LDC_W: case LDC2_W: push(new Constant(arg)); return null;
- case BIPUSH: push(new Constant(i1)); // FIXME return null;
- case SIPUSH: push(new Constant(i1)); // FIXME return null;
+ case BIPUSH: push(new Constant((Integer)arg)); return null;
+ case SIPUSH: push(new Constant((Integer)arg)); return null;
- case TABLESWITCH: new Branch((MethodGen.Switch)arg);
- case LOOKUPSWITCH: new Branch((MethodGen.Switch)arg);
+ case TABLESWITCH: return new Branch((MethodGen.Switch)arg);
+ case LOOKUPSWITCH: return new Branch((MethodGen.Switch)arg);
- /*
+ /* FIXME
case MONITORENTER: Op.monitorEnter(pop());
case MONITOREXIT: Op.monitorExit(pop());
*/
}
}
+
+ public void debugBodyToString(StringBuffer sb) {
+ StringBuffer sb0 = new StringBuffer();
+ super.debugBodyToString(sb0);
+ StringTokenizer st = new StringTokenizer(sb0.toString(), "\n");
+ String[] lines = new String[st.countTokens()];
+ for(int i=0; i<lines.length; i++) lines[i] = st.nextToken();
+ for(int j=0; j<ofs[0]; j++) {
+ String s = " /* " + lines[j].trim();
+ while(s.length() < 50) s += " ";
+ s += " */";
+ sb.append(s);
+ sb.append("\n");
+ }
+
+ bindingMap = new IdentityHashMap();
+ nextVar = 0;
+
+ for(int i=0; i<numOps; i++) {
+ String s = " /* " + lines[ofs[i]].trim();
+ while(s.length() < 50) s += " ";
+ s += " */ ";
+ s += ops[i].toString();
+ sb.append(s);
+ sb.append(";\n");
+ for(int j=ofs[i]+1; j<(i==numOps-1?size():ofs[i+1]); j++) {
+ s = " /* " + lines[j].trim();
+ while(s.length() < 50) s += " ";
+ s += " */";
+ sb.append(s);
+ sb.append("\n");
+ }
+ }
+ }
+
+ private Map bindingMap;
+ private int nextVar;
+
public static void main(String[] args) throws Exception {
InputStream is = Class.forName(args[0]).getClassLoader().getResourceAsStream(args[0].replace('.', '/')+".class");
System.out.println(new ClassFile(new DataInputStream(is), true).toString());
projects / org.ibex.classgen.git / blobdiff