llvm dev - Jul 2015 - [LLVMdev] [RFC] New StackMap format proposal (StackMap v2)

Hi Hal,

no, as far as I can recall we don’t make that guarantee for StackMap Records.
Although, since we record the StackMap Records in function order and in
instruction order inside a function this has always been true, but that wasn’t
intentional. This format shouldn’t change this, but it also isn’t something that
we programmatically enforce.

Do you depend on that behavior?

-Juergen
> On Jul 9, 2015, at 4:59 PM, Hal Finkel <hfinkel at anl.gov> wrote:
> 
> Do you guarantee that these will appear in order of increasing instruction
offset?
> 
> -Hal
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----- Original Message -----
> From: "Juergen Ributzka" <juergen at apple.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: "Lang Hames" <lhames at apple.com>, "LLVM
Dev" <llvmdev at cs.uiuc.edu>
> Sent: Friday, July 10, 2015 11:34:48 AM
> Subject: Re: [LLVMdev] [RFC] New StackMap format proposal (StackMap v2)
> 
> 
> Hi Hal,
> 
> no, as far as I can recall we don’t make that guarantee for StackMap
> Records. Although, since we record the StackMap Records in function
> order and in instruction order inside a function this has always
> been true, but that wasn’t intentional. This format shouldn’t change
> this, but it also isn’t something that we programmatically enforce.
> 
> Do you depend on that behavior?
No, but I've noticed that it is true in practice, and so I think that we
should say something about it one way or another. Especially since, in switching
to a fixed-size record format, binary searching now becomes relatively
easy/fast. Maybe it would be a useful guarantee?

Thanks again,
Hal
> 
> 
> -Juergen
> 
> 
> 
> 
> 
> 
> On Jul 9, 2015, at 4:59 PM, Hal Finkel < hfinkel at anl.gov > wrote:
> 
> Do you guarantee that these will appear in order of increasing
> instruction offset?
> 
> -Hal
> 
-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory

Sounds good. I will add that to the StackMap documentation when I update it for
v2.

—Juergen
> On Jul 10, 2015, at 9:40 AM, Hal Finkel <hfinkel at anl.gov> wrote:
> 
> No, but I've noticed that it is true in practice, and so I think that
we should say something about it one way or another. Especially since, in
switching to a fixed-size record format, binary searching now becomes relatively
easy/fast. Maybe it would be a useful guarantee?
> 
> Thanks again,
> Hal
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