Chapter 6 (#38)

* #37 Create chapter 6 skeleton

* #37 Revise type system - TOP, BOTTOM, CONTROL are now directly implemented in Type, XCONTROL is a new type and that's implemented directly too.
We have a _type field that is like an enum.

* #37 Revise Type.meet() - this is now final.
Subclasses can override xmeet() which is protected but
now handles simple types in Type itself.

* #37 Basic test for peephole of CFG

* #37 Revise compute of if

* #37 Revise compute of if

* #37 WIP peephole of If

* #37 WIP peephole of If

* #37 WIP peephole of If

* #37 WIP peephole of If

* #37 WIP peephole of If

* #37 WIP fix the chars inserted by IntelliJ

* #37 WIP Fix compute type in IfNode

* #37 WIP Null check region inputs

* #37 WIP Fix where we choose great grand parent instead of grand parent
Add new test

* #37 WIP More fixes and tests

* #37 WIP Some minor adjustments

* Cleanup folding dead IF tests

Remove isDeadCtrl & just test for the constant.
Remove DEAD_CTRL, doesn't properly reset between tests.
Move keep/unkeep to Node.
PhiNode has a proper compute() call.
ProjNode ideal is a lot simpler.
Region doesn't ever get a null.
Move the mergeScopes Region peep till after all Phis are added.
Type TOP and XCONTROL count as constants.
TypeTuple gets a toString

* #37 WIP Upate README

* #37 WIP Region node should check if one of its inputs is a region that needs to be peepholed

* #37 WIP If node should check if its ctrl input is a Region that has only 1 live input so can be peepholed

* #37 WIP Further update to README to make the peephole logic clearer. Also discuss the relationship between Region and Phi nodes

* Region removes dead input paths

Remove region-folding in Return, If.
Add a Makefile.
Reformat triple-quote lines to be emacs-friendly.

* StopNode idealize

Return type sharpens to include control input.

* Remove !=, >=, >; use Not and <, <=, ==

Fix bug mixing rotating different ops.
Generalize Add fold constants; apply to Mul, EQ.
Fix Div.copy

* Fix bug rotating e.g. < or <=

Peep is only valid for associative ops

* #37 WIP Doc updates

* Work over the Ch6 Readme

Major issue: Region inputs align 1-to-1 with Phi inputs, but a Region can have zero to many Phis.  When we lose a Region input (dead path), we need to lose the same inputs to each Phi - but we don't lose the Phis themselves, unless we're folding away down to the last live input.

* Update chapter06/README.md

Co-authored-by: Yichen Yan <oraluben@outlook.com>

* Update chapter06/README.md

Co-authored-by: Yichen Yan <oraluben@outlook.com>

* #37 Backport type system changes to chapter 2

* #37 Backport type system changes to chapter 3

* #37 Backport type system changes to chapter 4

* #37 Backport type system changes to chapter 5

* #37 Merge chapter 5 updates from main.
Remove language grammar module as we describe the grammar incrementally in each chapter.

* #37 Chapter 6 doc updates - added visuals to show effects of CFG peephole

* #37 Sync some updates to chapter 2

* #37 Sync some updates to chapter 3

* #37 Sync some updates to chapter 4

---------

Co-authored-by: Cliff Click <cliffc@acm.org>
Co-authored-by: Yichen Yan <oraluben@outlook.com>

1 files changed, 0 insertions, 79 deletions

diff --git a/language/pom.xml b/language/pom.xml
deleted file mode 100644
index dbb4710e..00000000
--- a/language/pom.xml
+++ /dev/null
@@ -1,79 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
-    <parent>
-        <groupId>com.seaofnodes</groupId>
-        <artifactId>simple</artifactId>
-        <version>1.0</version>
-    </parent>
-	<artifactId>language-grammar</artifactId>
-	<packaging>jar</packaging>
-	<name>SeaOfNodes Demo Simple Language Grammar</name>
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<maven.compiler.target>21</maven.compiler.target>
-		<maven.compiler.source>21</maven.compiler.source>
-		<antlr4test-maven-plugin.version>1.22</antlr4test-maven-plugin.version>
-		<antlr.version>4.11.1</antlr.version>
-		<junit.version>4.13.2</junit.version>
-	</properties>
-	<dependencies>
-		<dependency>
-			<groupId>org.antlr</groupId>
-			<artifactId>antlr4-runtime</artifactId>
-			<version>${antlr.version}</version>
-			<type>jar</type>
-			<scope>compile</scope>
-		</dependency>
-	</dependencies>
-	<build>
-		<pluginManagement>
-			<plugins>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-compiler-plugin</artifactId>
-					<version>3.10.1</version>
-				</plugin>
-			</plugins>
-		</pluginManagement>
-		<plugins>
-			<plugin>
-				<groupId>org.antlr</groupId>
-				<artifactId>antlr4-maven-plugin</artifactId>
-				<version>${antlr.version}</version>
-				<configuration>
-					<visitor>true</visitor>
-					<listener>true</listener>
-				</configuration>
-				<executions>
-					<execution>
-						<phase>generate-sources</phase>
-						<goals>
-							<goal>antlr4</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-			<plugin>
-				<groupId>com.khubla.antlr</groupId>
-				<artifactId>antlr4test-maven-plugin</artifactId>
-				<version>${antlr4test-maven-plugin.version}</version>
-				<configuration>
-					<verbose>false</verbose>
-					<showTree>false</showTree>
-					<entryPoint>program</entryPoint>
-					<grammarName>SimpleLanguage</grammarName>
-					<packageName>com.seaofnodes.simple.antlr</packageName>
-					<exampleFiles>examples/</exampleFiles>
-				</configuration>
-				<executions>
-					<execution>
-						<goals>
-							<goal>test</goal>
-						</goals>
-					</execution>
-				</executions>
-			</plugin>
-		</plugins>
-	</build>
-</project>