From 5fb03752b195e99dd251c9d497cccc93335bffe2 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Mon, 21 Apr 2025 11:57:04 -0700
Subject: Code quality on loop with many continues

---
 .../src/test/java/com/seaofnodes/simple/Chapter21Test.java     |  7 +++++++
 chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.c    |  7 +++++++
 chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.smp  | 10 ++++++++++
 3 files changed, 24 insertions(+)
 create mode 100644 chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.c
 create mode 100644 chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.smp

(limited to 'chapter21/src/test')

diff --git a/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java b/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
index 6a22498b..1857367b 100644
--- a/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
+++ b/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
@@ -73,6 +73,13 @@ public class Chapter21Test {
         TestC.run("stringHash", 9);
     }
 
+    @Test public void testLoop2() throws IOException {
+        String src = Files.readString(Path.of("src/test/java/com/seaofnodes/simple/progs/loop2.smp"));
+        testCPU(src,"x86_64_v2", "Win64"  ,0,"return (inc,Phi(Loop,0,inc));");
+        testCPU(src,"riscv"    , "SystemV",0,"return ( Phi(Loop,0,addi) + #1 );");
+        testCPU(src,"arm"      , "SystemV",0,"return (inc,Phi(Loop,0,inc));");
+    }
+
     @Test public void testNewtonExport() throws IOException {
         String result = """
 0  0.000000   (0)
diff --git a/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.c b/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.c
new file mode 100644
index 00000000..934f2d89
--- /dev/null
+++ b/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.c
@@ -0,0 +1,7 @@
+
+__attribute__ ((CALL_CONV))
+extern int loop2();
+
+int main() {
+  return loop2();
+}
diff --git a/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.smp b/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.smp
new file mode 100644
index 00000000..01ec827e
--- /dev/null
+++ b/chapter21/src/test/java/com/seaofnodes/simple/progs/loop2.smp
@@ -0,0 +1,10 @@
+// -*- mode: java;  -*-
+int i = 0;
+while(true) {
+    i += 1;
+    if( i==0 ) continue;
+    if( i==1 ) continue;
+    if( i==2 ) break;
+    continue;
+}
+return i;
-- 
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