1 files changed, 56 insertions, 0 deletions
diff --git a/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/PhaseTest.java b/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/PhaseTest.java
new file mode 100644
index 00000000..899f42fe
--- /dev/null
+++ b/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/PhaseTest.java
@@ -0,0 +1,56 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.graph.GraphObserver;
+import com.seaofnodes.simple.codegen.CodeGen;
+import com.seaofnodes.simple.codegen.CodeGen.Phase;
+import com.seaofnodes.simple.node.Node;
+import java.util.ArrayList;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class PhaseTest {
+    private static final String SRC = "int sum=0; for(int i=0; i<arg; i++) sum+=i; return sum;";
+
+    @Test public void testStopAndResume() {
+        ArrayList<String> phases = new ArrayList<>();
+        CodeGen code = new CodeGen(SRC);
+        code._obs = new GraphObserver<Node>() {
+            @Override public void before(Node n) {}
+            @Override public void after(Node n, Node repl, boolean applied) {}
+            @Override public void phase(String phase) { phases.add(phase); }
+        };
+        code.driver(Phase.Iter);
+        assertEquals(Phase.Iter,code._phase);
+        assertEquals("Parse Iter",String.join(" ",phases));
+        code.driver(Phase.TypeCheck);
+        code.driver(Phase.TypeCheck); // Repeated requests do not rerun phases.
+        code.driver(Phase.LoopTree);
+        assertEquals(Phase.LoopTree,code._phase);
+        code.driver(Phase.LocalSched);
+        assertEquals("Parse Iter Opto IterPostOpto FinalizeIR TypeCheck LoopTree Schedule LocalSched",String.join(" ",phases));
+        assertEquals("45",Eval2.eval(code,10));
+    }
+
+    @Test public void testResumeMachineCompilation() {
+        CodeGen staged = new CodeGen(SRC).driver(Phase.TypeCheck);
+        staged.driver(Phase.Select,"x86_64_v2","SystemV");
+        staged.driver(Phase.Encoding,"x86_64_v2","SystemV");
+        byte[] bits = staged._encoding._bits.toByteArray();
+        CodeGen direct = new CodeGen(SRC).driver(Phase.Encoding,"x86_64_v2","SystemV");
+        assertArrayEquals(bits,direct._encoding._bits.toByteArray());
+    }
+
+    @Test public void testOptoRequiresIter() {
+        CodeGen code = new CodeGen(SRC).parse();
+        try {
+            code.opto();
+            fail("Opto must not implicitly run Iter");
+        } catch( AssertionError expected ) {
+            assertEquals("Cannot run Opto after Parse",expected.getMessage());
+        }
+        code.iter().opto();
+        assertEquals(Phase.Opto,code._phase);
+        code.driver(Phase.LocalSched);
+        assertEquals("45",Eval2.eval(code,10));
+    }
+}