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package com.seaofnodes.simple;
import com.seaofnodes.simple.evaluator.Evaluator;
import com.seaofnodes.simple.node.StopNode;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class Chapter14Test {
@Test
public void testJig() {
Parser parser = new Parser(
"""
return 3.14;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 3.14;", stop.toString());
assertEquals(3.14, Evaluator.evaluate(stop, 0));
}
@Test
public void testRange() {
Parser parser = new Parser(
"""
int b;
if( arg ) b=1; else b=0;
int c = 99;
if( b < 0 ) c = -1;
if( b > 2 ) c = 1;
return c;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 99;", stop.toString());
assertEquals(99L, Evaluator.evaluate(stop, 0));
}
@Test
public void testU8() {
Parser parser = new Parser(
"""
u8 b = 123;
b = b + 456;// Truncate
return b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 67;", stop.toString());
assertEquals(67L, Evaluator.evaluate(stop, 0));
}
@Test
public void testU8While() {
Parser parser = new Parser(
"""
u8 b = 123;
while( b ) b = b + 456;// Truncate
return b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return Phi(Loop10,123,((Phi_b+456)&255));", stop.toString());
}
@Test
public void testU1() {
Parser parser = new Parser(
"""
bool b = 123;
b = b + 456;// Truncate
u1 c = b; // No more truncate needed
return c;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 1;", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 0));
}
@Test
public void testAnd() {
Parser parser = new Parser(
"""
int b = 123;
b = b+456 & 31; // Precedence
return b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 3;", stop.toString());
assertEquals(3L, Evaluator.evaluate(stop, 0));
}
@Test
public void testRefLoad() {
Parser parser = new Parser(
"""
struct Foo { u1 b; }
Foo f = new Foo;
f.b = 123;
return f.b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 1;", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 0));
}
@Test
public void testSigned() {
Parser parser = new Parser(
"""
i8 b = 255; // Chopped
return b; // Sign extend
""");
StopNode stop = parser.parse().iterate();
assertEquals("return -1;", stop.toString());
assertEquals(-1L, Evaluator.evaluate(stop, 0));
}
@Test
public void testI8() {
Parser parser = new Parser(
"""
i8 b = arg;
b = b + 1;// Truncate
return b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return (((((arg<<56)>>56)+1)<<56)>>56);", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 0));
}
@Test
public void testMask() {
Parser parser = new Parser(
"""
u16 mask = (1<<16)-1; // AND mask
int c = 123456789 & mask;
return c; //
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 52501;", stop.toString());
assertEquals(52501L, Evaluator.evaluate(stop, 0));
}
@Test
public void testWrapMinus() {
Parser parser = new Parser(
"""
int MAX = 9223372036854775807; //0x7FFFFFFFFFFFFFFF;
int i = (arg&MAX) + -MAX + -1; // Basically (e0) + Long.MIN_VALUE
int j = -i; // Negating Long.MIN_VALUE wraps, cannot constant fold
if (arg) j = 1;
return j;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return Phi(Region29,1,(-((arg&9223372036854775807)+-9223372036854775808)));", stop.toString());
assertEquals(-9223372036854775808L, Evaluator.evaluate(stop, 0));
assertEquals(1L, Evaluator.evaluate(stop, 1));
}
@Test
public void testWrapShr() {
Parser parser = new Parser(
"""
return (arg >>> 1)==0;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return (!(arg>>>1));", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 0));
assertEquals(1L, Evaluator.evaluate(stop, 1));
assertEquals(0L, Evaluator.evaluate(stop, 2));
}
@Test
public void testOr() {
Parser parser = new Parser(
"""
return (arg | 123 ^ 456) >>> 1;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return (((arg|123)^456)>>>1);", stop.toString());
assertEquals(217L, Evaluator.evaluate(stop, 0));
}
@Test
public void testMaskFloat() {
Parser parser = new Parser(
"""
flt f = arg;
arg = f & 0;
return arg;
""");
try { parser.parse().iterate(); fail(); }
catch( Exception e ) { assertEquals("Cannot '&' FltBot",e.getMessage()); }
}
@Test
public void testLoadBug() {
Parser parser = new Parser(
"""
struct A { int i; }
struct B { int i; }
A a = new A;
A t1 = new A;
B b = new B;
B t2 = new B;
int i;
if (arg) i = a.i;
else i = b.i;
return i;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return Phi(Region34,.i,.i);", stop.toString());
assertEquals(0L, Evaluator.evaluate(stop, 0));
}
@Test
public void testBug2() {
Parser parser = new Parser(
"""
int z = 0;
while (1) {
int j;
if (arg&3) {
j = arg >> 2;
} else {
j = (arg >> 3)+z;
}
return j+1;
}
""");
StopNode stop = parser.parse().iterate();
assertEquals("return ((arg>>Phi(Region33,2,3))+1);", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 0));
assertEquals(1L, Evaluator.evaluate(stop, 1));
assertEquals(2L, Evaluator.evaluate(stop, 7));
assertEquals(2L, Evaluator.evaluate(stop, 8));
}
@Test
public void testBug3() {
Parser parser = new Parser(
"""
flt f = arg;
bool b;
if (arg&3) b = f == 1.0;
else b = f == 2.0;
if (arg&5) b = arg == 1;
return b;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return Phi(Region35,(arg==1),((flt)arg==Phi(Region24,1.0,2.0)));", stop.toString());
assertEquals(1L, Evaluator.evaluate(stop, 1));
assertEquals(0L, Evaluator.evaluate(stop, 2));
assertEquals(0L, Evaluator.evaluate(stop, 3));
}
@Test
public void testBug4() {
Parser parser = new Parser(
"""
int i;
if (arg&7) i=3;
else i=2;
return (arg == i) == 1;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return (arg==Phi(Region19,3,2));", stop.toString());
assertEquals(0L, Evaluator.evaluate(stop, 0));
assertEquals(0L, Evaluator.evaluate(stop, 1));
assertEquals(0L, Evaluator.evaluate(stop, 2));
assertEquals(1L, Evaluator.evaluate(stop, 3));
}
@Test
public void testBug5() {
Parser parser = new Parser(
"""
int d = -1;
while (1) {
int i = (arg & 7) + (9223372036854775807 - 7);
if (arg & 1) i = ((arg&3) + (9223372036854775807 - 3)) & d;
return i + -1;
}
""");
StopNode stop = parser.parse().iterate();
assertEquals("return (Phi(Region44,((arg&3)+9223372036854775804),((arg&7)+9223372036854775800))+-1);", stop.toString());
assertEquals(0x7FFFFFFFFFFFFFF7L, Evaluator.evaluate(stop, 0));
assertEquals(0x7FFFFFFFFFFFFFFCL, Evaluator.evaluate(stop, 1));
}
@Test
public void testTypes() {
Parser parser = new Parser(
"""
i8 xi8 = 123456789; if( xi8 != 21 ) return -8;
i16 xi16 = 123456789; if( xi16 != -13035 ) return -16;
i32 xi32 = 123456789; if( xi32 != 123456789 ) return -32;
i64 xi64 = 123456789; if( xi64 != 123456789 ) return -64;
int xint = 123456789; if( xint != 123456789 ) return -64;
u1 ui1 = 123456789; if( ui1 != 1 ) return 1;
u8 ui8 = 123456789; if( ui8 != 21 ) return 8;
u16 ui16 = 123456789; if( ui16 != 52501 ) return 16;
u32 ui32 = 123456789; if( ui32 != 123456789 ) return 32;
flt fflt = 3.141592653589793; if( fflt != 3.141592653589793 ) return 3;
f64 ff64 = 3.141592653589793; if( ff64 != 3.141592653589793 ) return 3;
f32 ff32 = 3.141592653589793; if( ff32 != 3.1415927410125732) return 5;
return 0;
""");
StopNode stop = parser.parse().iterate();
assertEquals("return 0;", stop.toString());
assertEquals(0L, Evaluator.evaluate(stop, 0));
}
}
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