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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.node.*;
import org.junit.Test;
import static org.junit.Assert.*;
public class Chapter05Test {
@Test
public void testIfStmt() {
CodeGen code = new CodeGen(
"""
int a = 1;
if (arg == 1)
a = arg+2;
else {
a = arg-3;
}
return a;
""");
code.parse().opto();
assertEquals("return Phi(Region,(arg+2),(arg-3));", code.print());
}
@Test
public void testTest() {
CodeGen code = new CodeGen(
"""
int c = 3;
int b = 2;
if (arg == 1) {
b = 3;
c = 4;
}
return c;
""");
code.parse().opto();
assertEquals("return Phi(Region,4,3);", code.print());
}
@Test
public void testReturn2() {
CodeGen code = new CodeGen(
"""
if( arg==1 )
return 3;
else
return 4;
""");
code.parse();
assertEquals("return Phi(Region,3,4);", code.print());
}
@Test
public void testIfMergeB() {
CodeGen code = new CodeGen(
"""
int a=arg+1;
int b=0;
if( arg==1 )
b=a;
else
b=a+1;
return a+b;""");
code.parse().opto();
assertEquals("return ((arg<<1)+Phi(Region,2,3));", code.print());
}
@Test
public void testIfMerge2() {
CodeGen code = new CodeGen(
"""
int a=arg+1;
int b=arg+2;
if( arg==1 )
b=b+a;
else
a=b+1;
return a+b;""");
code.parse().opto();
assertEquals("return ((Phi(Region,(arg<<1),arg)+arg)+Phi(Region,4,5));", code.print());
}
@Test
public void testMerge3() {
CodeGen code = new CodeGen(
"""
int a=1;
if( arg==1 )
if( arg==2 )
a=2;
else
a=3;
else if( arg==3 )
a=4;
else
a=5;
return a;
""");
code.parse().opto();
assertEquals("return Phi(Region,Phi(Region,2,3),Phi(Region,4,5));", code.print());
}
@Test
public void testMerge4() {
CodeGen code = new CodeGen(
"""
int a=0;
int b=0;
if( arg )
a=1;
if( arg==0 )
b=2;
return arg+a+b;
""");
code.parse().opto();
assertEquals("return ((arg+Phi(Region,1,0))+Phi(Region,2,0));", code.print());
}
@Test
public void testMerge5() {
CodeGen code = new CodeGen(
"""
int a=arg==2;
if( arg==1 )
{
a=arg==3;
}
return a;
""");
code.parse().opto();
assertEquals("return (arg==Phi(Region,3,2));", code.print());
}
@Test
public void testMergeSameCon() {
CodeGen code = new CodeGen(
"""
int a=arg;
if( arg==1 )
a=3;
else
a=3;
return a;
""");
code.parse().opto();
assertEquals("return 3;", code.print());
}
@Test
public void testTrue() {
CodeGen code = new CodeGen("return true;").parse();
assertEquals("return 1;",code.print());
}
@Test
public void testHalfDef() {
try { new CodeGen("if( arg==1 ) int b=2; return b;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Cannot define a 'b' on one arm of an if",e.getMessage()); }
}
@Test
public void testHalfDef2() {
try { new CodeGen("if( arg==1 ) { int b=2; } else { int b=3; } return b;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Undefined name 'b'",e.getMessage()); }
}
@Test
public void testRegress1() {
try { new CodeGen("if(arg==2) int a=1; else int b=2; return a;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Cannot define a 'a' on one arm of an if",e.getMessage()); }
}
@Test
public void testBadNum() {
try { new CodeGen("return 1-;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Syntax error, expected an identifier or expression: ;",e.getMessage()); }
}
@Test
public void testKeyword1() {
try { new CodeGen("int true=0; return true;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Expected an identifier, found 'true'",e.getMessage()); }
}
@Test
public void testKeyword2() {
try { new CodeGen("int else=arg; if(else) else=2; else else=1; return else;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Expected an identifier, found 'else'",e.getMessage()); }
}
@Test
public void testKeyword3() {
try { new CodeGen("int a=1; ififif(arg);a=2;return a;").parse(); fail(); }
catch( RuntimeException e ) { assertEquals("Undefined name 'ififif'",e.getMessage()); }
}
}
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