RFR: 8286401: Address possibly lossy conversions in Microbenchmarks

[Aleksey Shipilev]

On Wed, 11 May 2022 14:57:16 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> #8599 would add a new warning. This address the conversions in the microbenchmark component by means of making the types precise or adding explicit casts. There's quite a few changes in the ByteBuffers benchmarks, but the real change is in the template as these are generated.
> 
> I've run through a subset of the affected benchmarks and verified that the results are either neutral or improve somewhat (seem to be the case in a few of the ByteBuffer micros).

I have questions. Also, copyright dates are not consistently updated in affected files?

test/micro/org/openjdk/bench/vm/compiler/PointerBenchmarkFlat.java line 151:

> 149:         int sum = 0;
> 150:         for (int i = 0 ; i < ELEM_SIZE ; i++) {
> 151:             sum += (int)ptr_ptr.get(i).address().toRawLongValue();

Here and later: `toRawLongValue` returns `long`, right? So why don't we change the accumulator and return value to `long`, like we do in other tests?

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

PR: https://git.openjdk.java.net/jdk/pull/8654