RFR: 8261671: X86 I2L conversion can be skipped for certain masked positive values [v3]

Wed Feb 17 18:57:41 UTC 2021

On Wed, 17 Feb 2021 18:33:16 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Please, add a test which verifies result of generated code for different ranges of mask (especially corner cases). See `compiler//codegen/BMI1.java`
> There are also example of verification of generated assembler in `compiler//intrinsics/bmi/`

I'm taking a look at a test to verify generated code like the BMI1 test you suggest above.

There is a current test that verifies operation indirectly (both long to int and int to long): test/hotspot/jtreg/compiler/c2/TestSkipLongToIntCast.java

Do we need both? A number of similar patches have been merged without, https://hg.openjdk.java.net/jdk/jdk/rev/d0f55423e913 for example.

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PR: https://git.openjdk.java.net/jdk/pull/2590