add a test that create a lambda using condy

asm-test/src/main/java/org/objectweb/asm/test/AsmTest.java

@@ -131,7 +131,8 @@ public abstract class AsmTest {
     JDK9_MODULE("jdk9.module-info"),
     JDK11_ALL_INSTRUCTIONS("jdk11.AllInstructions"),
     JDK11_ALL_STRUCTURES("jdk11.AllStructures"),
-    JDK11_ALL_STRUCTURES_NESTED("jdk11.AllStructures$Nested");
+    JDK11_ALL_STRUCTURES_NESTED("jdk11.AllStructures$Nested"),
+    JDK11_LAMBDA_CONDY("jdk11.LambdaCondy");
 
     private final String name;
 

asm-test/src/resources/java/jdk11/LambdaCondy.java

+// ASM: a very small and fast Java bytecode manipulation framework
+// Copyright (c) 2000-2011 INRIA, France Telecom
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+// 3. Neither the name of the copyright holders nor the names of its
+//    contributors may be used to endorse or promote products derived from
+//    this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+// THE POSSIBILITY OF SUCH DAMAGE.
+package jdk11;
+
+/**
+ * By default with jdk 11, constant lambda are compiled using constant dynamic
+ * The classfile was generated with the amber (branch condy-folding) compiler. 
+ */
+public class LambdaCondy {
+  public static void main(String[] args) {
+    Runnable r = () -> System.out.println("hello condy");
+    r.run();
+  }
+}

asm-util/src/test/resources/jdk11.LambdaCondy.txt

+// class version 55.0 (55)
+// access flags 0x21
+public class jdk11/LambdaCondy {
+
+  // compiled from: LambdaCondy.java
+  // access flags 0x19
+  public final static INNERCLASS java/lang/invoke/MethodHandles$Lookup java/lang/invoke/MethodHandles Lookup
+
+  // access flags 0x1
+  public <init>()V
+   L0
+    LINENUMBER 7 L0
+    ALOAD 0
+    INVOKESPECIAL java/lang/Object.<init> ()V
+    RETURN
+    MAXSTACK = 1
+    MAXLOCALS = 1
+
+  // access flags 0x9
+  public static main([Ljava/lang/String;)V
+   L0
+    LINENUMBER 9 L0
+    LDC run : Ljava/lang/Runnable; java/lang/invoke/LambdaMetafactory.metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/Object; (6) [()V, jdk11/LambdaCondy.lambda$main$0()V (6), ()V]
+    ASTORE 1
+   L1
+    LINENUMBER 10 L1
+    ALOAD 1
+    INVOKEINTERFACE java/lang/Runnable.run ()V (itf)
+   L2
+    LINENUMBER 11 L2
+    RETURN
+    MAXSTACK = 1
+    MAXLOCALS = 2
+
+  // access flags 0x100A
+  private static synthetic lambda$main$0()V
+   L0
+    LINENUMBER 9 L0
+    GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
+    LDC "hello condy"
+    INVOKEVIRTUAL java/io/PrintStream.println (Ljava/lang/String;)V
+    RETURN
+    MAXSTACK = 2
+    MAXLOCALS = 0
+}

asm/src/test/java/org/objectweb/asm/ClassReaderTest.java

@@ -285,13 +285,14 @@ public class ClassReaderTest extends AsmTest implements Opcodes {
     ClassVisitor classVisitor = new EmptyClassVisitor(apiParameter.value());
     // jdk8.ArtificialStructures contains structures which require ASM5, but only inside the method
     // code. Here we skip the code, so this class can be read with ASM4. Likewise for
-    // jdk11.AllInstructions.
+    // jdk11.AllInstructions and jdk11.LambdaCondy
     assertThat(() -> classReader.accept(classVisitor, ClassReader.SKIP_CODE))
         .succeedsOrThrows(RuntimeException.class)
         .when(
             classParameter.isMoreRecentThan(apiParameter)
                 && classParameter != PrecompiledClass.JDK8_ARTIFICIAL_STRUCTURES
-                && classParameter != PrecompiledClass.JDK11_ALL_INSTRUCTIONS);
+                && classParameter != PrecompiledClass.JDK11_ALL_INSTRUCTIONS
+                && classParameter != PrecompiledClass.JDK11_LAMBDA_CONDY);
   }
 
   /**