From f4bd723d929e53475f7990374dca7b7dfcbbdc42 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Sun, 1 Nov 2026 10:33:55 -0800
Subject: Add Chapter 29 for tech debt cleanup with the parser split

Keep Chapter 28b intact and carry the grammar-oriented parser package, Var move, IterPeeps move, and parser regression tests into Chapter 29. Defer privacy and exclude its experimental tests and fixture changes.

Register the chapter in the indexes, IntelliJ modules and run configurations, Maven reactor, roadmap, and linear-history publisher. Windows and Linux each pass 573 tests, release builds, 199 allocation replays, and 29 native checks.
---
 .../java/com/seaofnodes/simple/MinusNodeTest.java  | 65 ++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 chapter29/src/test/java/com/seaofnodes/simple/MinusNodeTest.java

(limited to 'chapter29/src/test/java/com/seaofnodes/simple/MinusNodeTest.java')

diff --git a/chapter29/src/test/java/com/seaofnodes/simple/MinusNodeTest.java b/chapter29/src/test/java/com/seaofnodes/simple/MinusNodeTest.java
new file mode 100644
index 00000000..f7fbde03
--- /dev/null
+++ b/chapter29/src/test/java/com/seaofnodes/simple/MinusNodeTest.java
@@ -0,0 +1,65 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.codegen.CodeGen;
+import com.seaofnodes.simple.node.ConstantNode;
+import com.seaofnodes.simple.node.MinusNode;
+import com.seaofnodes.simple.node.Node;
+import com.seaofnodes.simple.type.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class MinusNodeTest {
+    @Test public void testMonotoneCompute() {
+        CodeGen code = new CodeGen("return 0;");
+        ArrayList<Type> inputs = new ArrayList<>(Arrays.asList(Type.gather()));
+        for( long value : new long[]{Long.MIN_VALUE,Long.MIN_VALUE+1,-1,1,Long.MAX_VALUE} )
+            inputs.add(TypeInteger.constant(value));
+        for( double value : new double[]{-0.0,0.0,-1.0,1.0,Double.NaN,Double.NEGATIVE_INFINITY,Double.POSITIVE_INFINITY} )
+            inputs.add(TypeFloat.constant(value));
+        Type[][] expected = new Type[3][inputs.size()];
+        for( CodeGen.Phase phase : new CodeGen.Phase[]{CodeGen.Phase.Parse,CodeGen.Phase.Iter,CodeGen.Phase.Opto,CodeGen.Phase.IterPostOpto} ) {
+            code.driver(phase);
+            for( byte mode=0; mode<3; mode++ ) {
+                // An isolated analysis input: vary its type without peepholes
+                // selecting a mode or folding the node under test.
+                Node input = ConstantNode.seed(Type.BOTTOM);
+                input.setDef(0,null);
+                MinusNode minus = new MinusNode(input,mode);
+                Type[] results = new Type[inputs.size()];
+                for( int i=0; i<inputs.size(); i++ ) {
+                    input._type = inputs.get(i);
+                    results[i] = minus.compute();
+                    if( phase==CodeGen.Phase.Parse ) expected[mode][i] = results[i];
+                    else assertSame("Phase changed compute",expected[mode][i],results[i]);
+                }
+                // The same order relation covers both falling SCCP types
+                // and rising Iter types, including crossing numeric families.
+                for( int i=0; i<inputs.size(); i++ )
+                    for( int j=0; j<inputs.size(); j++ )
+                        if( inputs.get(i).isa(inputs.get(j)) )
+                            assertTrue("mode="+mode+": "+inputs.get(i)+" -> "+inputs.get(j)+
+                                       " gave "+results[i]+" -> "+results[j],results[i].isa(results[j]));
+            }
+        }
+    }
+
+    @Test public void testUnresolvedInput() {
+        new CodeGen("return 0;").driver(CodeGen.Phase.Opto);
+        Node input = ConstantNode.seed(TypeInteger.TRUE);
+        MinusNode minus = new MinusNode(input);
+        assertSame(TypeInteger.constant(-1),minus.compute());
+        input._type = Type.BOTTOM;
+        assertSame(Type.BOTTOM,minus.compute());
+        minus.setMode((byte)1);
+        assertSame(Type.BOTTOM,minus.compute());
+    }
+
+    @Test public void testRecursiveFloat() {
+        CodeGen code = new CodeGen("val _neg = { int x -> x ? -_neg(x-1) : 1.0; }; return _neg(arg);")
+            .driver(CodeGen.Phase.TypeCheck);
+        for( int i=0; i<4; i++ )
+            assertEquals((i&1)==0 ? "1.0" : "-1.0",Eval2.eval(code,i));
+    }
+}
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