The GeneratedMethodAccessor for a reflective call to TestNewAcmp.testEq02_1 contains an incorrect cast to LMyValue1 instead of QMyValue1, leading to JIT crashes (JDK-8270352) because the generated bytecode is not verified:

45 checkcast 16 <compiler/valhalla/inlinetypes/MyValue1> 0
  256 bci: 45 ReceiverTypeData count(0) nonprofiled_count(0) entries(1)
                                    'compiler/valhalla/inlinetypes/MyValue1'(5120 1,00)
48 invokevirtual 10 <compiler/valhalla/inlinetypes/TestNewAcmp.testEq02_1(Qcompiler/valhalla/inlinetypes/MyValue1;Qcompiler/valhalla/inlinetypes/MyValue1;)Z>
  312 bci: 48 VirtualCallData count(0) nonprofiled_count(0) entries(1)
                                    'compiler/valhalla/inlinetypes/TestNewAcmp'(5120 1,00)
                argument types 0: stack(1) 'compiler/valhalla/inlinetypes/MyValue1'
                                    1: stack(2) 'compiler/valhalla/inlinetypes/MyValue1'
51 invokestatic 52 <java/lang/Boolean.valueOf(Z)Ljava/lang/Boolean;>

The following change "fixes" the problem:

index 72bc6eb6e63..c34ce441441 100644
--- a/src/java.base/share/classes/jdk/internal/reflect/MethodAccessorGenerator.java
+++ b/src/java.base/share/classes/jdk/internal/reflect/MethodAccessorGenerator.java
@@ -341,7 +341,7 @@ class MethodAccessorGenerator extends AccessorGenerator {
         for (int i = 0; i < parameterTypes.length; i++) {
             Class<?> c = parameterTypes[i];
             if (!isPrimitive(c)) {
- asm.emitConstantPoolUTF8(getClassName(c, false));
+ asm.emitConstantPoolUTF8(getClassName(c, true));
                 asm.emitConstantPoolClass(asm.cpi());
             }
         }


45 checkcast 16 <Qcompiler/valhalla/inlinetypes/MyValue1;> 1
  256 bci: 45 ReceiverTypeData count(0) nonprofiled_count(0) entries(1)
                                    'compiler/valhalla/inlinetypes/MyValue1'(5120 1,00)
48 invokevirtual 10 <compiler/valhalla/inlinetypes/TestNewAcmp.testEq02_1(Qcompiler/valhalla/inlinetypes/MyValue1;Qcompiler/valhalla/inlinetypes/MyValue1;)Z>
  312 bci: 48 VirtualCallData count(0) nonprofiled_count(0) entries(1)
                                    'compiler/valhalla/inlinetypes/TestNewAcmp'(5120 1,00)
                argument types 0: stack(1) 'compiler/valhalla/inlinetypes/MyValue1'
                                    1: stack(2) 'compiler/valhalla/inlinetypes/MyValue1'