RFR(S) [backport 11]: 8209511: C2 asserts with UseSSE < 4 and AVX enabled: "Label was never bound to a location, but it was used as a jmp target

[Aleksey Shipilev]

On 12/11/18 6:31 PM, Aleksey Shipilev wrote:
> On 12/11/18 6:20 PM, Hohensee, Paul wrote:
>> Webrev: http://cr.openjdk.java.net/~phh/8206075.8208480.8209511/webrev.00/
>>
>> The patches apply cleanly, but the one for 8209511 needs a machine with AVX enabled to test it,
>> which I don’t have. Would someone (perhaps Tobias, who fixed it? :)) please apply the patch and
>> run “java -XX:UseSSE=3 -version” to verify that there’s no crash?
> You sure -version is enough?
> 
> Passes on my i7-7820X with each of these:
> 
>  -XX:UseSSE=0
>  -XX:UseSSE=1
>  -XX:UseSSE=2
>  -XX:UseSSE=3
>  -XX:UseSSE=4 (last supported)
>  -XX:UseAVX=0
>  -XX:UseAVX=1
>  -XX:UseAVX=2
>  -XX:UseAVX=3 (last supported)

It does not fail this either:

CONF=linux-x86_64-normal-server-fastdebug make images run-test
TEST=compiler/cpuflags/TestSSE4Disabled.java

...but then it does not fail without patch too :)

-Aleksey