Re: [Jikesrvm-core] Introduction of pragma to suppress baseline compiler warnings

[Ian R. <ian...@ma...>]

I was looking for suppress warnings in a name, and then I found 
UninterruptibleNoWarn - so the functionality I want is already present. 
Neat.

Ian

Ian Rogers wrote:
> Hi,
>
> I've extended the statics so that we can at boot image write time get 
> the value of statics. This is a very worthy thing to do as it means the 
> optimizing compiler can access objects in the JTOC at boot image write 
> time. Previously/currently we have all manner of fudges and requirements 
> to make sure we don't trip over this problem, in particular for string 
> constants. Unfortunately the approach I've taken adds an aastore 
> instruction to setSlotContents (this is fairly unavoidable given the 
> situation) which the boot image compiler flags as being a forbidden 
> bytecode in this uninterruptible method. The truth is that the aastore 
> bytecode may only ever be executed when writing the boot image, but of 
> course the baseline compiler is too dumb to know this. What I'd like to 
> do is create a suppress warning pragma, these are common place with 
> annotations and one of their widest uses. Unfortunately we're not as far 
> along running with generics as I'd like, so I'll have to use a pragma 
> exception. The alternative is just to live with seeing a warning.
>
> I thought adding a pragma might in someway be controversial so I'd float 
> the idea here first.
>
> Thanks,
>
> Ian
>
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