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authorCliff Click <cliffc@acm.org>2024-08-05 16:15:27 -0700
committerCliff Click <cliffc@acm.org>2026-10-04 13:30:41 -0700
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Chapter 13: Global Code Motion
Co-authored-by: Thalia Archibald <thalia@archibald.dev> Co-authored-by: Dibyendu Majumdar <mobile@majumdar.org.uk> Co-authored-by: Tamás Hadházy <85063808+Hels15@users.noreply.github.com> Co-authored-by: Hsiang-Ying Fu <66062782+fuhsnn@users.noreply.github.com> Co-authored-by: tannal <tannal2409@gmail.com> Co-authored-by: hadha <helsgithub15@gmail.com> Co-authored-by: fuhsnn <66062782+fuhsnn@users.noreply.github.com> Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com> Co-authored-by: Symious <14933944+symious@users.noreply.github.com> Co-authored-by: RobertObkircher <robert.obkircher@gmail.com> Co-authored-by: Robert Obkircher <robert.obkircher@gmail.com> Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
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+digraph chapter13 {
+/*
+struct S { int f; }
+S v=new S;
+v.f = 2;
+int i=new S.f;
+i=v.f;
+if (arg) v.f=1;
+return i;
+
+*/
+ rankdir=BT;
+ concentrate="true";
+ compound="true";
+ subgraph cluster_Nodes {
+ Start2 [ shape=plaintext label=<
+ <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+ <TR><TD BGCOLOR="yellow">Start</TD></TR>
+ <TR><TD>
+ <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+ <TR><TD PORT="p0" BGCOLOR="yellow">$ctrl</TD><TD PORT="p1">$mem</TD><TD PORT="p2">arg</TD></TR>
+ </TABLE>
+ </TD></TR>
+ </TABLE>>
+ ];
+ MemMerge [ shape=box label="MemMerge" ];
+ Stop3 [ shape=box style=filled fillcolor=yellow label="Stop" ];
+ Con_4 [ label="#0" ];
+ new9 [ label="new S" ];
+ Con_11 [ label="#2" ];
+ Store12 [ label=".f =" ];
+ new13 [ label="new S" ];
+ Store14 [ label=".f =" ];
+ Load16 [ label=".f" ];
+ If17 [ shape=plaintext label=<
+ <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+ <TR><TD BGCOLOR="yellow">If</TD></TR>
+ <TR><TD>
+ <TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0">
+ <TR><TD PORT="p0" BGCOLOR="yellow">True</TD><TD PORT="p1" BGCOLOR="yellow">False</TD></TR>
+ </TABLE>
+ </TD></TR>
+ </TABLE>>
+ ];
+ Con_21 [ label="#1" ];
+ Store22 [ label=".f =" ];
+ Region23 [ shape=box style=filled fillcolor=yellow label="Region" ];
+ Phi_224 [ style=filled fillcolor=lightyellow label="MemPhi_2" ];
+ Return25 [ shape=box style=filled fillcolor=yellow label="Return" ];
+ { rank=same; Region23;Phi_224;}
+ }
+ edge [ fontname=Helvetica, fontsize=8 ];
+ Stop3 -> Return25[taillabel=0 color=red];
+ new9 -> Start2:p0[taillabel=0 color=green];
+ Store12 -> Start2:p0[taillabel=0 color=red];
+ Store12 -> Start2:p1[taillabel=1 color=blue];
+ Store12 -> new9[taillabel=2];
+ Store12 -> Con_11[taillabel=3];
+ new13 -> Start2:p0[taillabel=0 color=green];
+ Store14 -> Start2:p0[taillabel=0 color=red];
+ Store14 -> Store12[taillabel=1 color=blue];
+ Store14 -> new13[taillabel=2];
+ Store14 -> Con_4[taillabel=3];
+ Load16 -> Start2:p0[taillabel=0 color=red];
+ Load16 -> Store14[taillabel=1 color=blue];
+ Load16 -> new9[taillabel=2];
+ If17 -> Start2:p0[taillabel=0 color=red];
+ If17 -> Start2:p2[taillabel=1];
+ Store22 -> If17:p0[taillabel=0 color=red];
+ Store22 -> Store14[taillabel=1 color=blue];
+ Store22 -> new9[taillabel=2];
+ Store22 -> Con_21[taillabel=3];
+ Store22 -> Load16[taillabel=4];
+ Region23 -> If17:p0[taillabel=1 color=red];
+ Region23 -> If17:p1[taillabel=2 color=red];
+ Phi_224 -> Region23 [style=dotted taillabel=0];
+ Phi_224 -> Store22[taillabel=1 color=blue];
+ Phi_224 -> Store14[taillabel=2 color=blue constraint=false];
+ Return25 -> Region23[taillabel=0 color=red];
+ Return25 -> Load16[taillabel=2];
+ Return25 -> MemMerge[taillabel=1 color=blue];
+ MemMerge -> Start2:p1[taillabel=1 color=blue];
+ MemMerge -> Phi_224[taillabel=2 color=blue];
+ MemMerge -> Region23[taillabel=0 color=green];
+}