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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.node.*;
import com.seaofnodes.simple.type.TypeInteger;
import org.junit.Test;
import org.junit.Ignore;
import static org.junit.Assert.*;
public class Chapter04Test {
@Test
public void testPeephole() {
CodeGen code = new CodeGen("return 1+arg+2; ");
code.parse();
assertEquals("return (arg+3);", code.print());
}
@Test
public void testPeephole2() {
CodeGen code = new CodeGen("return (1+arg)+2;");
code.parse();
assertEquals("return (arg+3);", code.print());
}
@Test
public void testAdd0() {
CodeGen code = new CodeGen("return 0+arg;");
code.parse();
assertEquals("return arg;", code.print());
}
@Test
public void testAddAddMul() {
CodeGen code = new CodeGen("return arg+0+arg;");
code.parse();
assertEquals("return (arg<<1);", code.print());
}
@Test
public void testPeephole3() {
CodeGen code = new CodeGen("return 1+arg+2+arg+3; ");
code.parse();
assertEquals("return ((arg<<1)+6);", code.print());
}
@Test
public void testMul1() {
CodeGen code = new CodeGen("return 1*arg;");
code.parse();
assertEquals("return arg;", code.print());
}
@Test
public void testSub0() {
CodeGen code = new CodeGen("return arg-0;");
code.parse();
assertEquals("return arg;", code.print());
}
@Test
public void test0Sub() {
CodeGen code = new CodeGen("return 0-arg;");
code.parse();
assertEquals("return (-arg);", code.print());
}
@Test
public void testSubNeg() {
CodeGen code = new CodeGen("return 3--arg;");
code.parse();
assertEquals("return (arg+3);", code.print());
}
@Test
public void testNegSub() {
CodeGen code = new CodeGen("return -arg-3;");
code.parse();
assertEquals("return (-(arg+3));", code.print());
}
@Test
public void testVarArg() {
CodeGen code = new CodeGen("return arg; ");
code.parse();
assertTrue(code.ctrl() instanceof FunNode);
assertTrue(code.expr() instanceof ParmNode);
}
// Adding functions means `main` does not constant fold the incoming arg value
@Ignore @Test
public void testConstantArg() {
CodeGen code = new CodeGen("return arg; ", TypeInteger.constant(2), 123L).parse();
assertEquals("return 2;", code.expr().in(1).toString());
}
@Test
public void testCompEq() {
CodeGen code = new CodeGen("return 3==3; ");
code.parse();
assertEquals("return 1;", code.print());
}
@Test
public void testCompEq2() {
CodeGen code = new CodeGen("return 3==4; ");
code.parse();
assertEquals("return 0;", code.print());
}
@Test
public void testCompNEq() {
CodeGen code = new CodeGen("return 3!=3; ");
code.parse();
assertEquals("return 0;", code.print());
}
@Test
public void testCompNEq2() {
CodeGen code = new CodeGen("return 3!=4; ");
code.parse();
assertEquals("return 1;", code.print());
}
@Test
public void testBug1() {
CodeGen code = new CodeGen("int a=arg+1; int !b=a; b=1; return a+2; ");
code.parse();
assertEquals("return (arg+3);", code.print());
}
@Test
public void testBug2() {
CodeGen code = new CodeGen("int !a=arg+1; a=a; return a; ");
code.parse();
assertEquals("return (arg+1);", code.print());
}
@Test
public void testBug3() {
try { new CodeGen("inta=1; return a;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Undefined name 'inta'",e.getMessage()); }
}
@Test
public void testBug4() {
CodeGen code = new CodeGen("return -arg;");
code.parse();
assertEquals("return (-arg);", code.print());
}
@Test
public void testBug5() {
CodeGen code = new CodeGen("return arg--2;");
code.parse();
assertEquals("return (arg--2);", code.print());
}
}
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