Example usage for org.objectweb.asm Label Label

List of usage examples for org.objectweb.asm Label Label

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Introduction

In this page you can find the example usage for org.objectweb.asm Label Label.

Prototype

public Label()

Source Link

Document

Constructs a new label.

Usage

From source file:com.yahoo.yqlplus.engine.internal.bytecode.CodeEmitterTest.java

@Test
public void requireWidenAdd() throws Exception {
    UnitGenerator unit = new UnitGenerator("foo", source);
    unit.addInterface(Callable.class);
    MethodGenerator gen = unit.createMethod("call");
    gen.setReturnType(AnyTypeWidget.getInstance());
    final BytecodeExpression leftExpr = source.constant(1);
    final BytecodeExpression rightExpr = source.constant(1L);

    gen.add(new BytecodeSequence() {
        @Override//  w w w  . j  av a  2 s. co m
        public void generate(CodeEmitter code) {
            Label hasNull = new Label();
            CodeEmitter.Unification unify = code.unifiedEmit(leftExpr, rightExpr, hasNull);
            code.getMethodVisitor().visitInsn(Opcodes.LADD);
            code.box(BaseTypeAdapter.INT64);
            code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            if (unify.nullPossible) {
                code.getMethodVisitor().visitLabel(hasNull);
                code.getMethodVisitor().visitInsn(Opcodes.ACONST_NULL);
                code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            }
        }
    });

    source.build();
    Class<? extends Callable> clazz = (Class<? extends Callable>) source.getGeneratedClass(unit);
    Callable c = clazz.newInstance();
    Assert.assertEquals(2L, c.call());
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.CodeEmitterTest.java

@Test
public void requireFloatAdd() throws Exception {
    UnitGenerator unit = new UnitGenerator("foo", source);
    unit.addInterface(Callable.class);
    MethodGenerator gen = unit.createMethod("call");
    gen.setReturnType(AnyTypeWidget.getInstance());
    final BytecodeExpression leftExpr = source.constant(1);
    final BytecodeExpression rightExpr = source.constant(1.0f);

    gen.add(new BytecodeSequence() {
        @Override//  w  w w  . ja  v a  2  s.  c o  m
        public void generate(CodeEmitter code) {
            Label hasNull = new Label();
            CodeEmitter.Unification unify = code.unifiedEmit(leftExpr, rightExpr, hasNull);
            code.getMethodVisitor().visitInsn(Opcodes.DADD);
            code.box(BaseTypeAdapter.FLOAT64);
            code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            if (unify.nullPossible) {
                code.getMethodVisitor().visitLabel(hasNull);
                code.getMethodVisitor().visitInsn(Opcodes.ACONST_NULL);
                code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            }
        }
    });

    source.build();
    Class<? extends Callable> clazz = (Class<? extends Callable>) source.getGeneratedClass(unit);
    Callable c = clazz.newInstance();
    Assert.assertEquals(2.0, c.call());
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.CodeEmitterTest.java

@Test
public void requireBoxedAdd() throws Exception {
    UnitGenerator unit = new UnitGenerator("foo", source);
    unit.addInterface(Callable.class);
    MethodGenerator gen = unit.createMethod("call");
    gen.setReturnType(AnyTypeWidget.getInstance());
    final BytecodeExpression leftExpr = source.constant(BaseTypeAdapter.INT32.boxed(), 1);
    final BytecodeExpression rightExpr = source.constant(1.0f);

    gen.add(new BytecodeSequence() {
        @Override//w w w .  j a va 2s .c  om
        public void generate(CodeEmitter code) {
            Label hasNull = new Label();
            CodeEmitter.Unification unify = code.unifiedEmit(leftExpr, rightExpr, hasNull);
            code.getMethodVisitor().visitInsn(Opcodes.DADD);
            code.box(BaseTypeAdapter.FLOAT64);
            code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            if (unify.nullPossible) {
                code.getMethodVisitor().visitLabel(hasNull);
                code.getMethodVisitor().visitInsn(Opcodes.ACONST_NULL);
                code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            }
        }
    });

    source.build();
    Class<? extends Callable> clazz = (Class<? extends Callable>) source.getGeneratedClass(unit);
    Callable c = clazz.newInstance();
    Assert.assertEquals(2.0, c.call());
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.CodeEmitterTest.java

@Test
public void requireBoxedNull() throws Exception {
    UnitGenerator unit = new UnitGenerator("foo", source);
    unit.addInterface(Callable.class);
    MethodGenerator gen = unit.createMethod("call");
    gen.setReturnType(AnyTypeWidget.getInstance());
    final BytecodeExpression rightExpr = source.constant(1.0f);

    gen.add(new BytecodeSequence() {
        @Override/* w  ww.ja  v a  2s  . com*/
        public void generate(CodeEmitter code) {
            Label hasNull = new Label();
            CodeEmitter.Unification unify = code.unifiedEmit(new NullExpr(BaseTypeAdapter.INT32.boxed()),
                    rightExpr, hasNull);
            code.getMethodVisitor().visitInsn(Opcodes.DADD);
            code.box(BaseTypeAdapter.FLOAT64);
            code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            if (unify.nullPossible) {
                code.getMethodVisitor().visitLabel(hasNull);
                code.getMethodVisitor().visitInsn(Opcodes.ACONST_NULL);
                code.getMethodVisitor().visitInsn(Opcodes.ARETURN);
            }
        }
    });

    source.build();
    Class<? extends Callable> clazz = (Class<? extends Callable>) source.getGeneratedClass(unit);
    Callable c = clazz.newInstance();
    Assert.assertNull(c.call());
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.BlockAdapter.java

@Override
public void jump(BytecodeExpression test, final BytecodeExpression result) {
    final BytecodeExpression testExpr = test;
    final TypeWidget type = testExpr.getType();
    body.add(new BytecodeSequence() {
        @Override/*from w w w.j  a  v  a2 s  .  co  m*/
        public void generate(CodeEmitter code) {
            code.exec(testExpr);
            Label isTrue = new Label();
            Label isFalse = new Label();
            type.getComparisionAdapter().coerceBoolean(code, isTrue, isFalse, isFalse);
            MethodVisitor mv = code.getMethodVisitor();
            mv.visitLabel(isTrue);
            code.exec(result);
            mv.visitJumpInsn(Opcodes.GOTO, body.getEnd());
            mv.visitLabel(isFalse);
        }
    });
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.BytecodeCatchBuilder.java

@Override
public BytecodeSequence build() {
    return new BytecodeSequence() {
        @Override/*from  www.  ja va  2  s  .c  om*/
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            for (CatchClause catchClause : catchClauses) {
                if (catchClause.exceptionInternalNames.isEmpty()) {
                    mv.visitTryCatchBlock(body.getStart(), body.getEnd(), catchClause.getStart(), null);
                } else {
                    for (String name : catchClause.exceptionInternalNames) {
                        mv.visitTryCatchBlock(body.getStart(), body.getEnd(), catchClause.getStart(), name);
                    }
                }
            }
            Label done = new Label();
            body.generate(code);
            mv.visitJumpInsn(Opcodes.GOTO, done);
            for (CatchClause catchClause : catchClauses.subList(0, catchClauses.size() - 1)) {
                catchClause.generate(code);
                mv.visitJumpInsn(Opcodes.GOTO, done);
            }
            catchClauses.get(catchClauses.size() - 1).generate(code);
            mv.visitLabel(done);
        }
    };
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.CaseAdapter.java

@Override
public void when(final BytecodeExpression test, final BytecodeExpression value) {
    final TypeWidget type = test.getType();
    resultTypes.add(value.getType());//from w  w  w .j  a v  a  2s . co m
    body.add(new BytecodeSequence() {
        @Override
        public void generate(CodeEmitter code) {
            code.exec(test);
            Label isTrue = new Label();
            Label isFalse = new Label();
            type.getComparisionAdapter().coerceBoolean(code, isTrue, isFalse, isFalse);
            MethodVisitor mv = code.getMethodVisitor();
            mv.visitLabel(isTrue);
            code.exec(value);
            code.cast(unifiedOutputType, value.getType());
            mv.visitJumpInsn(Opcodes.GOTO, end);
            mv.visitLabel(isFalse);
        }
    });
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression and(Location loc, final List<BytecodeExpression> inputs) {
    return new BaseTypeExpression(BaseTypeAdapter.BOOLEAN) {
        @Override/*from  w  ww .  j a va 2 s .  c  o m*/
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            Label done = new Label();
            Label isFalse = new Label();
            for (BytecodeExpression input : inputs) {
                Label isTrue = new Label();
                code.exec(input);
                input.getType().getComparisionAdapter().coerceBoolean(code, isTrue, isFalse, isFalse);
                mv.visitLabel(isTrue);
            }
            code.emitBooleanConstant(true);
            mv.visitJumpInsn(Opcodes.GOTO, done);
            mv.visitLabel(isFalse);
            code.emitBooleanConstant(false);
            mv.visitLabel(done);
        }
    };
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression or(Location loc, final List<BytecodeExpression> inputs) {
    return new BaseTypeExpression(BaseTypeAdapter.BOOLEAN) {
        @Override/*from   w ww  .ja v a2s  . c o  m*/
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            Label done = new Label();
            Label isTrue = new Label();
            for (BytecodeExpression input : inputs) {
                Label isFalse = new Label();
                code.exec(input);
                input.getType().getComparisionAdapter().coerceBoolean(code, isTrue, isFalse, isFalse);
                mv.visitLabel(isFalse);
            }
            code.emitBooleanConstant(false);
            mv.visitJumpInsn(Opcodes.GOTO, done);
            mv.visitLabel(isTrue);
            code.emitBooleanConstant(true);
            mv.visitLabel(done);
        }
    };
}

From source file:com.yahoo.yqlplus.engine.internal.bytecode.types.gambit.ExpressionHandler.java

@Override
public BytecodeExpression not(Location loc, final BytecodeExpression input) {
    return new BaseTypeExpression(BaseTypeAdapter.BOOLEAN) {
        @Override/*  w ww .j av  a2 s .co  m*/
        public void generate(CodeEmitter code) {
            MethodVisitor mv = code.getMethodVisitor();
            Label done = new Label();
            Label isTrue = new Label();
            Label isFalse = new Label();
            code.exec(input);
            input.getType().getComparisionAdapter().coerceBoolean(code, isTrue, isFalse, isFalse);
            mv.visitLabel(isFalse);
            code.emitBooleanConstant(true);
            mv.visitJumpInsn(Opcodes.GOTO, done);
            mv.visitLabel(isTrue);
            code.emitBooleanConstant(false);
            mv.visitLabel(done);
        }
    };
}