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package com.seaofnodes.simple;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class Chapter10Test {
@Test
public void testFuzzer() {
CodeGen code = new CodeGen(
"""
int a = arg/3;
int b = arg*5;
int x = arg*7;
int y = arg/11;
int p; int g; int h;
if( (arg/13)==0 ) {
p = x + y;
g = x;
h = y;
} else {
p = a + b;
g = a;
h = b;
}
int r = g+h;
return p-r;
""");
code.parse().opto();
assertEquals("return 0;", code.print());
}
@Test
public void testStruct() {
CodeGen code = new CodeGen("""
struct Bar {
int a;
int b;
};
struct Foo {
int x;
};
Foo? foo = null;
Bar !bar = new Bar;
bar.a = 1;
bar.a = 2;
return bar.a;
""");
code.parse().opto();
assertEquals("return 2;", code.print());
}
@Test
public void testExample() {
CodeGen code = new CodeGen("""
struct Vector2D { int x; int y; };
Vector2D !v = new Vector2D;
v.x = 1;
if (arg)
v.y = 2;
else
v.y = 3;
return v;
""");
code.parse().opto();
assertEquals("return Vector2D;", code.print());
}
@Test
public void testBug() {
CodeGen code = new CodeGen("""
struct s0 {
int v0;
};
s0? v1=null;
int v3=v1.zAicm;
""");
try { code.parse(); fail(); }
catch( Exception e ) { assertEquals("Accessing unknown field 'zAicm' from 'null'",e.getMessage()); }
}
@Test
public void testBug2() {
CodeGen code = new CodeGen("""
struct s0 { int v0; };
arg=0+new s0.0;
""");
try { code.parse(); fail(); }
catch( Exception e ) { assertEquals("Expected an identifier, found 'null'",e.getMessage()); }
}
@Test
public void testLoop() {
CodeGen code = new CodeGen("""
struct Bar { int a; };
Bar !bar = new Bar;
while (arg) {
bar.a = bar.a + 2;
arg = arg + 1;
}
return bar.a;
""");
code.parse().opto();
assertEquals("return Phi(Loop,0,(Phi_a+2));", code.print());
}
@Test
public void testIf() {
CodeGen code = new CodeGen("""
struct Bar { int a; };
Bar !bar = new Bar;
if (arg) bar = null;
bar.a = 1;
return bar.a;
""");
try { code.parse().opto(); fail(); }
catch( Exception e ) { assertEquals("Type null is not of declared type *Bar",e.getMessage()); }
}
@Test
public void testIf2() {
CodeGen code = new CodeGen("""
struct Bar { int a; };
Bar? !bar = null;
if (arg) bar = new Bar;
bar.a = 1;
return bar.a;
""");
try { code.parse().opto().typeCheck(); fail(); }
catch( Exception e ) { assertEquals("Might be null accessing 'a'",e.getMessage()); }
}
@Test
public void testIf3() {
CodeGen code = new CodeGen("""
struct Bar { int a; };
Bar bar = null;
if (arg) bar = null;
bar.a = 1;
return bar.a;
""");
try { code.parse(); fail(); }
catch( Exception e ) { assertEquals("Type null is not of declared type *Bar", e.getMessage()); }
}
@Test
public void testIfOrNull() {
CodeGen code = new CodeGen("""
struct Bar { int a; };
Bar? !bar = new Bar;
if (arg) bar = null;
if( bar ) bar.a = 1;
return bar;
""");
code.parse().opto();
assertEquals("return Phi(Region,null,Bar);", code.print());
}
@Test
public void testIfOrNull2() {
CodeGen code = new CodeGen(
"""
struct Bar { int a; };
Bar? !bar = new Bar;
if (arg) bar = null;
int rez = 3;
if( !bar ) rez=4;
else bar.a = 1;
return rez;
""");
code.parse().opto();
assertEquals("return Phi(Region,4,3);", code.print());
}
@Test
public void testWhileWithNullInside() {
CodeGen code = new CodeGen("""
struct s0 {int v0;};
s0? !v0 = new s0;
int ret = 0;
while(arg) {
ret = v0.v0;
v0 = null;
arg = arg - 1;
}
return ret;
""");
try { code.parse().opto().typeCheck(); fail(); }
catch( Exception e ) {
assertEquals("Might be null accessing 'v0'", e.getMessage()); }
}
@Test
public void testRedeclareStruct() {
CodeGen code = new CodeGen("""
struct s0 {
int v0;
};
s0? v1=new s0;
s0? v1;
v1=new s0;
""");
try { code.parse(); fail(); }
catch( Exception e ) { assertEquals("Redefining name 'v1'", e.getMessage()); }
}
@Test
public void testIter() {
// Build and use an iterator
CodeGen code = new CodeGen(
"""
struct Iter {
int x;
int len;
};
Iter !i = new Iter;
i.len = arg;
int sum=0;
while( i.x < i.len ) {
sum = sum + i.x;
i.x = i.x + 1;
}
return sum;
""");
code.parse().opto();
assertEquals("return Phi(Loop,0,(Phi(Loop,0,(Phi_x+1))+Phi_sum));", code.print());
}
@Test
public void test1() {
CodeGen code = new CodeGen("""
struct s0 {int v0;};
s0 !ret = new s0;
while(arg) {
s0 !v0 = new s0;
v0.v0 = arg;
arg = arg-1;
if (arg==5) ret=v0;
}
return ret;
""");
code.parse().opto();
assertEquals("return Phi(Loop,s0,Phi(Region,s0,Phi_ret));", code.print());
}
@Test
public void test2() {
CodeGen code = new CodeGen("""
struct s0 {int v0;};
s0 !ret = new s0;
s0 !v0 = new s0;
while(arg) {
v0.v0 = arg;
arg = arg-1;
if (arg==5) ret=v0;
}
return ret;
""");
code.parse().opto();
assertEquals("return Phi(Loop,s0,Phi(Region,s0,Phi_ret));", code.print());
}
@Test
public void test3() {
CodeGen code = new CodeGen("""
struct s0 {int v0;};
s0 !ret = new s0;
while(arg < 10) {
s0 !v0 = new s0;
if (arg == 5) ret=v0;
arg = arg + 1;
}
return ret;
""");
code.parse().opto();
assertEquals("return Phi(Loop,s0,Phi(Region,s0,Phi_ret));", code.print());
}
@Test
public void testBug3() {
CodeGen code = new CodeGen("""
struct s0 { int f0; };
return new s0;
int v0=null.f0;
""");
try { code.parse(); fail(); }
catch( Exception e ) { assertEquals("Accessing unknown field 'f0' from 'null'",e.getMessage()); }
}
@Test
public void testBug4() {
CodeGen code = new CodeGen("""
if(0) {
while(0) if(arg) continue;
int v0=0;
while(1) {
int v2=-arg;
v0=v2;
}
}
""");
code.parse().opto();
assertEquals("return 0;", code.print());
}
@Test
public void testBug5() {
CodeGen code = new CodeGen("""
struct s0 {
int f0;
};
if(0) return 0;
else return new s0;
if(new s0.f0) return 0;
""");
code.parse().opto();
assertEquals("return s0;", code.print());
}
@Test
public void testBug6MissedWorklist() {
CodeGen code = new CodeGen("""
while(0) {}
int v4=0;
while(0<arg) {
v4=v4+1;
while(1) v4=-v4;
while(0) arg=-1;
}
return 0;
""");
code.parse().opto();
}
@Test
public void testBug7() {
CodeGen code = new CodeGen("""
struct s0 { int f0; };
s0 v0 = new s0;
while(v0.f0) {}
s0 v1 = v0;
return v1;
""");
code.parse().opto();
assertEquals("return (const)s0;", code.print());
}
@Test
public void testBug8() {
CodeGen code = new CodeGen("""
int v2=0;
while(0)
while(0) {}
{
{
{
int v36=0;
{
while(0) {
{
while(-v2) {
{
while(v36) {
while(v2) return 0;
break;
} }
if(-v2) break;
}
}
}
}
} }
}
""");
code.parse().opto();
assertEquals("return 0;", code.print());
}
@Test
public void testBug9() {
CodeGen code = new CodeGen("""
int v0=arg==0;
while(v0) continue;
return 0;
""");
code.parse().opto();
assertEquals("return 0;", code.print());
}
}
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