From 736c658c274404084b15b450b2ab72d0e7569586 Mon Sep 17 00:00:00 2001
From: Dibyendu Majumdar <dibyendumajumdar@users.noreply.github.com>
Date: Fri, 3 Nov 2023 21:21:54 +0000
Subject: Backport changes in Chapter 5 to previous chapters and update
 Chapter5 documentation (#34)

* Backport changes from chapter 5 to older chapters (#30)

* Fix wrong indent

* Backport to chapter 4

* Backport to chapter 3

* Backport to chapter 2

* Backport to chapter 1

* Add if statement to comment (#32)

* Update visuals for chapters 1,2 & 3.
Reenable drawing of edges from constants to Start for these chapters.

* Update visuals for chapters 4.
Revise text to explain the labeling of edges in graphs and that we omit edge from Constant to Start nodes from chapter 4.

* Add code snippets for if statement parsing and the duplication and merging of ScopeNodes.
Explain how scopeNodes are duplicated and merged.

* Add constant check to minus node (#31)

* Fix closing root block with } (#33)

* Backport fix closing root block with } to chapter 4 and 3 (#35)

* Show use-def edge from Phi to Region as dotted edge.
Add example of Phi peephole.
Update visuals.
Add more examples.

* Fix visuals in chapter 1 and README in chapter 4.

* Remove subheading

* Adjust spaces

---------

Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com>
---
 chapter04/docs/04-post-peephole.gv | 32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

(limited to 'chapter04/docs/04-post-peephole.gv')

diff --git a/chapter04/docs/04-post-peephole.gv b/chapter04/docs/04-post-peephole.gv
index 22f55468..51e176bc 100644
--- a/chapter04/docs/04-post-peephole.gv
+++ b/chapter04/docs/04-post-peephole.gv
@@ -3,8 +3,10 @@ digraph chapter04 {
 return 1+arg+2; #showGraph;
 */
 	rankdir=BT;
+	ordering="in";
+	concentrate="true";
 	subgraph cluster_Nodes {
-		Start1 [ shape=plaintext label=<
+		Start2 [ shape=plaintext label=<
 			<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
 			<TR><TD BGCOLOR="yellow">Start</TD></TR>
 			<TR><TD>
@@ -14,28 +16,28 @@ return 1+arg+2; #showGraph;
 			</TD></TR>
 			</TABLE>>
 		];
-		Con_9 [ label="#3" ];
-		Add10 [ label="Add" ];
-		Return11 [ shape=box style=filled fillcolor=yellow label="Return" ];
+		Con_10 [ label="#3" ];
+		Add11 [ label="+" ];
+		Return12 [ shape=box style=filled fillcolor=yellow label="Return" ];
 	}
 	node [shape=plaintext];
-	subgraph cluster_0 {
-		scope0 [label=<
+	subgraph cluster_Scope1_0 {
+		Scope1_0 [label=<
 			<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
-			<TR><TD BGCOLOR="cyan">0</TD><TD PORT="scope0_$ctrl">$ctrl</TD><TD PORT="scope0_arg">arg</TD></TR>
+			<TR><TD BGCOLOR="cyan">0</TD><TD PORT="Scope1_0_$ctrl">$ctrl</TD><TD PORT="Scope1_0_arg">arg</TD></TR>
 			</TABLE>>];
-	subgraph cluster_1 {
-		scope1 [label=<
+	subgraph cluster_Scope1_1 {
+		Scope1_1 [label=<
 			<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
 			<TR><TD BGCOLOR="cyan">1</TD></TR>
 			</TABLE>>];
 	}
 	}
-	Add10 -> Start1:p1;
-	Add10 -> Con_9;
-	Return11 -> Start1:p0 [color=red];
-	Return11 -> Add10;
+	edge [ fontname=Helvetica, fontsize=8 ];
+	Add11 -> Start2:p1[taillabel=1];
+	Add11 -> Con_10[taillabel=2];
+	Return12 -> Start2:p0[taillabel=0; color=red];
+	Return12 -> Add11[taillabel=1];
 	edge [style=dashed color=cornflowerblue];
-	scope0:"scope0_$ctrl" -> Start1:p0;
-	scope0:"scope0_arg" -> Start1:p1;
+	Scope1_0:"Scope1_0_arg" -> Start2:p1;
 }
\ No newline at end of file
-- 
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