Add Chapter 29 for tech debt cleanup with the parser splitmain

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.

1 files changed, 40 insertions, 0 deletions

diff --git a/chapter29/src/test/java/com/seaofnodes/simple/BulkMemPhiTest.java b/chapter29/src/test/java/com/seaofnodes/simple/BulkMemPhiTest.java
new file mode 100644
index 00000000..31c0302b
--- /dev/null
+++ b/chapter29/src/test/java/com/seaofnodes/simple/BulkMemPhiTest.java
@@ -0,0 +1,40 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.codegen.CodeGen;
+import com.seaofnodes.simple.node.*;
+import com.seaofnodes.simple.type.TypeInteger;
+import com.seaofnodes.simple.type.TypeMem;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class BulkMemPhiTest {
+    // Reduced from Capitalize's Lower-phase failure. A precise MemMerge slot
+    // may still be supplied by bulk memory which covers the requested alias.
+    @Test public void testBulkInPreciseSlot() {
+        CodeGen code=new CodeGen("");
+        code._phase=CodeGen.Phase.Lower;
+        Node m0=code.con(TypeMem.START), m1=code.con(TypeMem.BOT);
+        Node ctrl=new CProjNode(code._start,0,"Ctrl").init();
+        Node iff=new IfNode(ctrl,code.con(TypeInteger.BOOL)).init();
+        RegionNode region=new RegionNode(null,null,
+            new CProjNode(iff,0,"True").init(),
+            new CProjNode(iff,1,"False").init()).init();
+        BulkMemPhiNode bulk=new BulkMemPhiNode("$mem",region,m0,m1).init();
+        // A later init check proves its call arm dead. Its precise Phi can
+        // collapse before the surrounding aggregate gets another peephole.
+        RegionNode done=new RegionNode(null,null,region,code.XCTRL).init();
+        MemPhiNode precise=new MemPhiNode("$4",4,done,bulk,m1).init();
+        MemMergeNode merge=new MemMergeNode(null,m0);
+        merge.alias(4,precise);
+        merge.init();
+        Node folded=precise.peepholeOpt();
+        assertSame(bulk,folded);
+        precise.subsume(folded);
+
+        assertFalse(bulk.isSplit(4));
+        assertSame(bulk,merge.alias(4));
+        // Splitting this still-covered alias must tolerate the direct bulk use.
+        Node mem = bulk.idealize();
+        bulk.subsume(mem);
+    }
+}