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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import org.junit.Test;
import static org.junit.Assert.*;
public class Chapter20Test {
@Test
public void testJig() {
CodeGen code = new CodeGen("return 0;");
code.parse().opto().typeCheck();
assertEquals("return 0;", code.print());
assertEquals("0", Eval2.eval(code, 2));
}
static void testCPU( String src, String cpu, String os, int spills, String stop ) {
CodeGen code = new CodeGen(src);
code.driver(CodeGen.Phase.RegAlloc,cpu,os);
int delta = spills>>3;
if( delta==0 ) delta = 1;
if( spills != -1 && !CodeGen.iterSeedOverridden() )
assertEquals("Expect spills:",spills,code._regAlloc._spillScaled,delta);
if( stop != null )
assertEquals(stop, code.print());
}
private static void testAllCPUs( String src, int spills, String stop ) {
testCPU(src,"x86_64_v2", "SystemV",spills,stop);
testCPU(src,"riscv" , "SystemV",spills,stop);
testCPU(src,"arm" , "SystemV",spills,stop);
}
@Test public void testAlloc0() {
testCPU("return new u8[arg];","x86_64_v2", "SystemV",3,"return []u8;");
testCPU("return new u8[arg];","riscv" , "SystemV",5,"return []u8;");
testCPU("return new u8[arg];","arm" , "SystemV",5,"return []u8;");
}
@Test public void testBasic1() {
String src = "return arg | 2;";
testCPU(src,"x86_64_v2", "SystemV",1,"return (ori,mov(arg));");
testCPU(src,"riscv" , "SystemV",0,"return ( arg | #2 );");
testCPU(src,"arm" , "SystemV",0,"return (ori,arg);");
}
@Test
public void testNewtonInteger() {
String src =
"""
// Newtons approximation to the square root
val _sqrt = { int x ->
int guess = x;
while( 1 ) {
int next = (x/guess + guess)>>1;
if( next == guess ) return guess;
guess = next;
}
};
return _sqrt(arg) + _sqrt(arg+2);
""";
testCPU(src,"x86_64_v2", "win64" ,38,null);
testCPU(src,"riscv" , "SystemV",19,null);
testCPU(src,"arm" , "SystemV",19,null);
}
@Test
public void testNewtonFloat() {
String src =
"""
val _test_sqrt_noInline = { flt x ->
flt epsilon = 1e-15;
flt guess = x;
while( 1 ) {
flt next = (x/guess + guess)/2;
if( guess-epsilon <= next && next <= guess+epsilon )
return guess;
guess = next;
}
};
flt farg = arg; return _test_sqrt_noInline(farg) + _test_sqrt_noInline(farg+2.0);
""";
testCPU(src,"x86_64_v2", "SystemV",48,null);
testCPU(src,"riscv" , "SystemV",17,null);
testCPU(src,"arm" , "SystemV",18,null);
}
@Test
public void testIterPrettyPrintIsLocalAndReadOnly() {
CodeGen code = new CodeGen("""
val f_noInline = { flt x -> while(1) { if(x) return x; } };
flt y=arg;
return f_noInline(y)+f_noInline(y+2.0);
""").driver(CodeGen.Phase.Iter);
assertNull(code._start._ltree);
int pre = code._start._pre;
String p0 = code.toString();
String p1 = code.toString();
assertEquals(p0,p1);
assertNull(code._start._ltree);
assertEquals(pre,code._start._pre);
int main0 = p0.indexOf("--- class:Test.<clinit>");
int main1 = p0.indexOf("--- class:Test.<clinit> ----------------------",main0);
int fun0 = p0.indexOf("--- f_noInline ",main1);
int fun1 = p0.indexOf("--- f_noInline ----------------------",fun0);
assertTrue(main0 < main1 && main1 < fun0 && fun0 < fun1);
assertTrue(p0.indexOf("ToFloat",main0) < p0.indexOf("Call",main0));
assertTrue(p0.indexOf("CallEnd",fun0) == -1 || p0.indexOf("CallEnd",fun0) > fun1);
}
@Test
public void testAlloc2() {
String src = "int[] !xs = new int[3]; xs[arg]=1; return xs[arg&1];";
testCPU(src,"x86_64_v2", "SystemV",-1,"return .[];");
testCPU(src,"riscv" , "SystemV", 6,"return .[];");
testCPU(src,"arm" , "SystemV", 6,"return .[];");
}
@Test
public void testArray1() {
String src =
"""
int[] !ary = new int[arg];
// Fill [0,1,2,3,4,...]
for( int i=0; i<ary#; i++ )
ary[i] = i;
// Fill [0,1,3,6,10,...]
for( int i=0; i<ary#-1; i++ )
ary[i+1] += ary[i];
return ary[1] * 1000 + ary[3]; // 1 * 1000 + 6
""";
testCPU(src,"x86_64_v2", "SystemV",-1,"return mov(.[]);");
testCPU(src,"riscv" , "SystemV", 7,"return (add,.[],(mul,.[],1000));");
testCPU(src,"arm" , "SystemV", 5,"return (add,.[],(mul,.[],1000));");
}
@Test
public void testString() {
String src =
"""
struct String {
u8[] cs;
int _hashCode;
};
// Compare two Strings
val equals = { String self, String s ->
if( self == s ) return true;
if( self.cs# != s.cs# ) return false;
for( int i=0; i< self.cs#; i++ )
if( self.cs[i] != s.cs[i] )
return false;
return true;
};
// Return the String hashCode (cached, and never 0)
val hashCode = { String self ->
self._hashCode
? self._hashCode
: (self._hashCode = _hashCodeString(self));
};
val _hashCodeString = { String self ->
int hash=0;
for( int i=0; i< self.cs#; i++ )
hash = hash*31 + self.cs[i];
if( !hash ) hash = 123456789;
return hash;
};
""";
testCPU(src,"x86_64_v2", "SystemV",18,null);
testCPU(src,"riscv" , "SystemV", 7,null);
testCPU(src,"arm" , "SystemV", 8,null);
}
@Test
public void testCast() {
String src = "struct Bar { int x; }; var b = arg ? new Bar; return b ? b.x++ + b.x++ : -1;";
testCPU(src,"x86_64_v2", "SystemV",3,null);
testCPU(src,"riscv" , "SystemV",6,null);
testCPU(src,"arm" , "SystemV",6,null);
}
@Test
public void testFltArg() {
String src = "return {int i, flt f, int j->return i+f+j;};";
testAllCPUs(src,0,null);
}
@Test
public void testFlags1() {
String src = """
bool _b1 = arg == 1;
bool b2 = arg == 2;
if (b2) if (_b1) return 1;
if (_b1) return 2;
return 0;
""";
testCPU(src,"x86_64_v2", "SystemV",0,"return Phi(Region,2,0,1);");
testCPU(src,"riscv" , "SystemV",0,"return Phi(Region,2,0,1);");
testCPU(src,"arm" , "SystemV",0,"return Phi(Region,2,0,1);");
}
@Test
public void testFlags2() {
String src = """
bool b1 = arg == 1;
while (arg > 0) {
arg--;
if (b1) arg--;
}
return arg;
""";
testCPU(src,"x86_64_v2", "SystemV",3,null);
testCPU(src,"riscv" , "SystemV",2,null);
testCPU(src,"arm" , "SystemV",2,null);
}
}
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