RFR: 8278173: [vectorapi] Add x64 intrinsics for unsigned (zero extended) casts [v2]

[Quan Anh Mai]

On Thu, 10 Feb 2022 18:55:29 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - minor rename
>>  - address reviews
>
> Observing the following failures on CPUs with "Intel_R__Xeon_R__Gold_6354_CPU___3.00GHz" with HotSpot flags:
> 
> -XX:+CreateCoredumpOnCrash -ea -esa -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -server -XX:-TieredCompilation
> 
> 
> TestVectorCastAVX512.java:
> 
> Failed IR Rules (1)
> ------------------
> - Method "public static void compiler.vectorapi.reshape.tests.TestVectorCast.testUI256toL512(int[],long[])":
>   * @IR rule 1: "@compiler.lib.ir_framework.IR(failOn={}, applyIf={}, applyIfAnd={}, applyIfOr={}, counts={"(\\\\d+(\\\\s){2}(VectorUCastI2X.*)+(\\\\s){2}===.*)", "1"}, applyIfNot={})"
>     - counts: Graph contains wrong number of nodes:
>         Regex 1: (\\d+(\\s){2}(VectorUCastI2X.*)+(\\s){2}===.*)
>         Expected 1 but found 0 nodes.
> 
> 
> TestVectorCastAVX1.java:
> 
> - Method "public static void compiler.vectorapi.reshape.tests.TestVectorCast.testUB64toS64(byte[],short[])":
>   * @IR rule 1: "@compiler.lib.ir_framework.IR(failOn={}, applyIf={}, applyIfAnd={}, applyIfOr={}, counts={"(\\\\d+(\\\\s){2}(VectorUCastB2X.*)+(\\\\s){2}===.*)", "1"}, applyIfNot={})"
>     - counts: Graph contains wrong number of nodes:
>         Regex 1: (\\d+(\\s){2}(VectorUCastB2X.*)+(\\s){2}===.*)
>         Expected 1 but found 0 nodes.
> 
> - Method "public static void compiler.vectorapi.reshape.tests.TestVectorCast.testUB64toI128(byte[],int[])":
>   * @IR rule 1: "@compiler.lib.ir_framework.IR(failOn={}, applyIf={}, applyIfAnd={}, applyIfOr={}, counts={"(\\\\d+(\\\\s){2}(VectorUCastB2X.*)+(\\\\s){2}===.*)", "1"}, applyIfNot={})"
>     - counts: Graph contains wrong number of nodes:
>         Regex 1: (\\d+(\\s){2}(VectorUCastB2X.*)+(\\s){2}===.*)
>         Expected 1 but found 0 nodes.

@PaulSandoz Thanks a lot for your testing, the reason seems to be due to `LaneType::asIntegral` missing `ForceInline` annotation. I have run the reshape test 10 times without getting any failure while with previous patch there is often 1 or 2.
Thanks.

-------------

PR: https://git.openjdk.java.net/jdk/pull/7358