On Fri, 22 Jan 2021 01:25:25 GMT, Vladimir Kozlov <k...@openjdk.org> wrote:
>> Igor Veresov has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Check legacy flags validity before deriving flag values for emulation mode.
>
> src/hotspot/share/compiler/compilerDefinitions.cpp line 62:
>
>> 60: }
>> 61: } else if (strcmp(CompilationMode, "high-only") == 0) {
>> 62: if (!CompilerConfig::has_c2() &&
>> !CompilerConfig::is_jvmci_compiler()) {
>
> Is using `!is_c2_or_jvmci_compiler_available()` better here? All flags should
> be processed at this point. And we could have some `TieredStopAtLevel` flags.
> It looks like you have cross dependency between CompilerConfig and
> CompilationModeFlag which make using `is_c2_or_jvmci_compiler_available()`
> impossible here.
Yes, there is an unfortunate cross dependency. It would probably work fine
since ```_mode``` is initialized to ```NORMAL``` before parsing the flag. But I
wanted to not use any function that would depend on the value of the
```_mode``` during parsing. It could create trouble in the future. I'll put
more comments about that.
-------------
PR: https://git.openjdk.java.net/jdk/pull/1985
