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>
---
 chapter03/docs/03-graph2.gv | 46 +++++++++++++++++++++++++--------------------
 1 file changed, 26 insertions(+), 20 deletions(-)

(limited to 'chapter03/docs/03-graph2.gv')

diff --git a/chapter03/docs/03-graph2.gv b/chapter03/docs/03-graph2.gv
index c6c55028..f570b13e 100644
--- a/chapter03/docs/03-graph2.gv
+++ b/chapter03/docs/03-graph2.gv
@@ -1,29 +1,35 @@
 digraph chapter03 {
+/*
+int a=1; int b=2; int c=0; { int b=3; c=a+b; #showGraph; } return c; #showGraph;
+*/
 	rankdir=BT;
+	ordering="in";
+	concentrate="true";
 	subgraph cluster_Nodes {
-		Start1 [ shape=box style=filled fillcolor=yellow label="Start" ];
-		Con_2 [ label="#1" ];
-		Con_3 [ label="#2" ];
-		Con_5 [ label="#3" ];
-		Add6 [ label="Add" ];
-		Return7 [ shape=box style=filled fillcolor=yellow label="Return" ];
+		Start2 [ shape=box style=filled fillcolor=yellow label="Start" ];
+		Con_3 [ label="#1" ];
+		Con_4 [ label="#2" ];
+		Con_6 [ label="#3" ];
+		Add7 [ label="+" ];
+		Return8 [ 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="aqua">0</TD><TD PORT="scope0_a">a</TD><TD PORT="scope0_b">b</TD><TD PORT="scope0_c">c</TD></TR>
+			<TR><TD BGCOLOR="cyan">0</TD><TD PORT="Scope1_0_a">a</TD><TD PORT="Scope1_0_b">b</TD><TD PORT="Scope1_0_c">c</TD></TR>
 			</TABLE>>];
 	}
-	Con_2 -> Start1 [style=dotted];
-	Con_3 -> Start1 [style=dotted];
-	Con_5 -> Start1 [style=dotted];
-	Add6 -> Con_2;
-	Add6 -> Con_5;
-	Return7 -> Start1 [color=red];
-	Return7 -> Add6;
+	edge [ fontname=Helvetica, fontsize=8 ];
+	Con_3 -> Start2[taillabel=0 style=dotted];
+	Con_4 -> Start2[taillabel=0 style=dotted];
+	Con_6 -> Start2[taillabel=0 style=dotted];
+	Add7 -> Con_3[taillabel=1];
+	Add7 -> Con_6[taillabel=2];
+	Return8 -> Start2[taillabel=0 color=red];
+	Return8 -> Add7[taillabel=1];
 	edge [style=dashed color=cornflowerblue];
-	scope0:scope0_a -> Con_2;
-	scope0:scope0_b -> Con_3;
-	scope0:scope0_c -> Add6;
-}
+	Scope1_0:"Scope1_0_a" -> Con_3;
+	Scope1_0:"Scope1_0_b" -> Con_4;
+	Scope1_0:"Scope1_0_c" -> Add7;
+}
\ No newline at end of file
-- 
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