diff -r a18280a1534d -r e7eff81d7f1d hotspot/src/share/vm/jvmci/jvmci_globals.cpp
--- a/hotspot/src/share/vm/jvmci/jvmci_globals.cpp	Tue Feb 23 10:22:56 2016 +0000
+++ b/hotspot/src/share/vm/jvmci/jvmci_globals.cpp	Mon Feb 22 23:37:29 2016 -0800
@@ -24,6 +24,8 @@
 
 #include "precompiled.hpp"
 #include "jvmci/jvmci_globals.hpp"
+#include "utilities/defaultStream.hpp"
+#include "runtime/globals_extension.hpp"
 
 JVMCI_FLAGS(MATERIALIZE_DEVELOPER_FLAG, \
             MATERIALIZE_PD_DEVELOPER_FLAG, \
@@ -34,3 +36,185 @@
             MATERIALIZE_NOTPRODUCT_FLAG,
             IGNORE_RANGE, \
             IGNORE_CONSTRAINT)
+
+#define JVMCI_IGNORE_FLAG_FOUR_PARAM(type, name, value, doc)
+#define JVMCI_IGNORE_FLAG_THREE_PARAM(type, name, doc)
+
+// Return true if jvmci flags are consistent.
+bool JVMCIGlobals::check_jvmci_flags_are_consistent() {
+  if (EnableJVMCI) {
+    return true;
+  }
+
+  // "FLAG_IS_DEFAULT" fail count.
+  int fail_count = 0;
+  // Number of "FLAG_IS_DEFAULT" fails that should be skipped before code
+  // detect real consistency failure.
+  int skip_fail_count;
+
+  // EnableJVMCI flag is false here.
+  // If any other flag is changed, consistency check should fail.
+  // JVMCI_FLAGS macros added below can handle all JVMCI flags automatically.
+  // But it contains check for EnableJVMCI flag too, which is required to be
+  // skipped. This can't be handled easily!
+  // So the code looks for at-least two flag changes to detect consistency
+  // failure when EnableJVMCI flag is changed.
+  // Otherwise one flag change is sufficient to detect consistency failure.
+  // Set skip_fail_count to 0 if EnableJVMCI flag is default.
+  // Set skip_fail_count to 1 if EnableJVMCI flag is changed.
+  // This value will be used to skip fails in macro expanded code later.
+  if (!FLAG_IS_DEFAULT(EnableJVMCI)) {
+    skip_fail_count = 1;
+  } else {
+    skip_fail_count = 0;
+  }
+
+#define EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(FLAG)  \
+  if (!FLAG_IS_DEFAULT(FLAG)) {                   \
+    fail_count++;                                 \
+    if (fail_count > skip_fail_count) {           \
+      return false;                               \
+    }                                             \
+  }
+
+#define JVMCI_DIAGNOSTIC_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)     EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+#define JVMCI_EXPERIMENTAL_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)   EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+
+  // Check consistency of diagnostic flags if UnlockDiagnosticVMOptions is true
+  // or not default. UnlockDiagnosticVMOptions is default true in debug builds.
+  if (UnlockDiagnosticVMOptions || !FLAG_IS_DEFAULT(UnlockDiagnosticVMOptions)) {
+    JVMCI_FLAGS(JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_DIAGNOSTIC_FLAG_VALUE_CHANGED_CHECK_CODE, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                IGNORE_RANGE, \
+                IGNORE_CONSTRAINT)
+  }
+
+  // Check consistency of experimental flags if UnlockExperimentalVMOptions is
+  // true or not default.
+  if (UnlockExperimentalVMOptions || !FLAG_IS_DEFAULT(UnlockExperimentalVMOptions)) {
+    JVMCI_FLAGS(JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_EXPERIMENTAL_FLAG_VALUE_CHANGED_CHECK_CODE, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                IGNORE_RANGE, \
+                IGNORE_CONSTRAINT)
+  }
+
+#ifndef PRODUCT
+#define JVMCI_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)        EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+#define JVMCI_PD_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, doc)            EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+#define JVMCI_NOTPRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)     EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+#else
+#define JVMCI_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)
+#define JVMCI_PD_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, doc)
+#define JVMCI_NOTPRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)
+#endif
+
+#define JVMCI_PD_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, doc)            EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+#define JVMCI_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE(type, name, value, doc)        EMIT_FLAG_VALUE_CHANGED_CHECK_CODE(name)
+
+  JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE, \
+              JVMCI_PD_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE, \
+              JVMCI_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE, \
+              JVMCI_PD_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE, \
+              JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+              JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+              JVMCI_NOTPRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE, \
+              IGNORE_RANGE, \
+              IGNORE_CONSTRAINT)
+
+#undef EMIT_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_PD_DEVELOP_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_NOTPRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_DIAGNOSTIC_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_PD_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_PRODUCT_FLAG_VALUE_CHANGED_CHECK_CODE
+#undef JVMCI_EXPERIMENTAL_FLAG_VALUE_CHANGED_CHECK_CODE
+
+  return true;
+}
+
+// Print jvmci arguments inconsistency error message.
+void JVMCIGlobals::print_jvmci_args_inconsistency_error_message() {
+  const char* error_msg = "Improperly specified VM option '%s'\n";
+  jio_fprintf(defaultStream::error_stream(), "EnableJVMCI must be enabled\n");
+
+#define EMIT_CHECK_PRINT_ERR_MSG_CODE(FLAG)                         \
+  if (!FLAG_IS_DEFAULT(FLAG)) {                                     \
+    if (strcmp(#FLAG, "EnableJVMCI")) {                             \
+      jio_fprintf(defaultStream::error_stream(), error_msg, #FLAG); \
+    }                                                               \
+  }
+
+#define JVMCI_DIAGNOSTIC_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)     EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+#define JVMCI_EXPERIMENTAL_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)   EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+
+  if (UnlockDiagnosticVMOptions || !FLAG_IS_DEFAULT(UnlockDiagnosticVMOptions)) {
+    JVMCI_FLAGS(JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_DIAGNOSTIC_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                IGNORE_RANGE, \
+                IGNORE_CONSTRAINT)
+  }
+
+  if (UnlockExperimentalVMOptions || !FLAG_IS_DEFAULT(UnlockExperimentalVMOptions)) {
+    JVMCI_FLAGS(JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_IGNORE_FLAG_THREE_PARAM, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                JVMCI_EXPERIMENTAL_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+                JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+                IGNORE_RANGE, \
+                IGNORE_CONSTRAINT)
+  }
+
+#ifndef PRODUCT
+#define JVMCI_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)        EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+#define JVMCI_PD_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, doc)            EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+#define JVMCI_NOTPRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)     EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+#else
+#define JVMCI_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)
+#define JVMCI_PD_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, doc)
+#define JVMCI_NOTPRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)
+#endif
+
+#define JVMCI_PD_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, doc)            EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+#define JVMCI_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE(type, name, value, doc)        EMIT_CHECK_PRINT_ERR_MSG_CODE(name)
+
+  JVMCI_FLAGS(JVMCI_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+              JVMCI_PD_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+              JVMCI_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+              JVMCI_PD_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+              JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+              JVMCI_IGNORE_FLAG_FOUR_PARAM, \
+              JVMCI_NOTPRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE, \
+              IGNORE_RANGE, \
+              IGNORE_CONSTRAINT)
+
+#undef EMIT_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_PD_DEVELOP_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_NOTPRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_PD_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_PRODUCT_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_DIAGNOSTIC_FLAG_CHECK_PRINT_ERR_MSG_CODE
+#undef JVMCI_EXPERIMENTAL_FLAG_CHECK_PRINT_ERR_MSG_CODE
+
+}
+
+#undef JVMCI_IGNORE_FLAG_FOUR_PARAM
+#undef JVMCI_IGNORE_FLAG_THREE_PARAM