On Tue, 10 May 2022 23:01:33 GMT, Roger Riggs <rri...@openjdk.org> wrote:
>> PR#8599 8244681: proposes to add compiler warnings for possible lossy
>> conversions
>> From the CSR:
>>
>> "If the type of the right-hand operand of a compound assignment is not
>> assignment compatible with the type of the variable, a cast is implied and
>> possible lossy conversion may silently occur. While similar situations are
>> resolved as compilation errors for primitive assignments, there are no
>> similar rules defined for compound assignments."
>>
>> This PR anticipates the warnings and adds explicit casts to replace the
>> implicit casts.
>> In most cases, the cast matches the type of the right-hand side to type of
>> the compound assignment.
>> Since these casts are truncating the value, there might be a different
>> refactoring that avoids the cast
>> but a direct replacement was chosen here.
>>
>> (Advise and suggestions will inform similar updates to other OpenJDK
>> modules).
>
> Roger Riggs has updated the pull request incrementally with one additional
> commit since the last revision:
>
> remove stray file
src/java.base/linux/classes/sun/nio/ch/EPollSelectorImpl.java line 128:
> 126: // timed poll interrupted so need to adjust timeout
> 127: long adjust = System.nanoTime() - startTime;
> 128: to -= (int)TimeUnit.MILLISECONDS.convert(adjust,
> TimeUnit.NANOSECONDS);
Can we change this `to =- (int) TimeUnit.NANOSECONDS.toMillis(adjust);` while
we here?
src/java.base/share/classes/jdk/internal/org/objectweb/asm/Frame.java line 615:
> 613: if (outputStackTop >= elements) {
> 614: outputStackTop -= (short)elements;
> 615: } else {
I think we usually try to avoid changing the ASM code if possible but maybe you
have to do this because the compiler option is used for compiling java.base?
src/java.base/unix/classes/sun/nio/ch/PollSelectorImpl.java line 123:
> 121: // timed poll interrupted so need to adjust timeout
> 122: long adjust = System.nanoTime() - startTime;
> 123: to -= (int)TimeUnit.MILLISECONDS.convert(adjust,
> TimeUnit.NANOSECONDS);
This one can also be changed to:
`to =- (int) TimeUnit.NANOSECONDS.toMillis(adjust);`
-------------
PR: https://git.openjdk.java.net/jdk/pull/8642
