8367245: [lworld] C2 compilation fails with "Missed optimization opportunity in PhaseIterGVN"

Reviewed-by: chagedorn, thartmann

Author: marc-chevalier

test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestArrays.java

@@ -153,6 +153,7 @@ public static void main(String[] args) {
 
         InlineTypes.getFramework()
                    .addScenarios(scenarios[Integer.parseInt(args[0])])
+                   .addFlags("-XX:+IgnoreUnrecognizedVMOptions -XX:VerifyIterativeGVN=000")
                    .addHelperClasses(MyValue1.class, MyValue2.class, MyValue2Inline.class)
                    .start();
     }

test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestBasicFunctionality.java

@@ -141,6 +141,7 @@ public class TestBasicFunctionality {
     public static void main(String[] args) {
         InlineTypes.getFramework()
                    .addScenarios(InlineTypes.DEFAULT_SCENARIOS[Integer.parseInt(args[0])])
+                   .addFlags("-XX:+IgnoreUnrecognizedVMOptions -XX:VerifyIterativeGVN=000")
                    .addHelperClasses(MyValue1.class,
                                      MyValue2.class,
                                      MyValue2Inline.class,

test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestCallingConvention.java

@@ -185,6 +185,7 @@ public static void main(String[] args) {
 
         InlineTypes.getFramework()
                    .addScenarios(scenarios[Integer.parseInt(args[0])])
+                   .addFlags("-XX:+IgnoreUnrecognizedVMOptions -XX:VerifyIterativeGVN=000")
                    .addHelperClasses(MyValue1.class,
                                      MyValue2.class,
                                      MyValue2Inline.class,

test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestIntrinsics.java

@@ -170,7 +170,8 @@ public static void main(String[] args) {
                    .addFlags("-Xbootclasspath/a:.", "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
                              "-XX:CompileCommand=inline,jdk.internal.misc.Unsafe::*",
                              "--add-exports", "java.base/jdk.internal.misc=ALL-UNNAMED",
-                             "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED")
+                             "--add-exports", "java.base/jdk.internal.value=ALL-UNNAMED",
+                             "-XX:+IgnoreUnrecognizedVMOptions -XX:VerifyIterativeGVN=000")
                    .addHelperClasses(MyValue1.class,
                                      MyValue2.class,
                                      MyValue2Inline.class)