[llvm-dev] [RFC][ThinLTO] llvm-dis ThinLTO summary dump format

[Teresa Johnson via llvm-dev]

On Fri, Jun 2, 2017 at 12:18 PM, Peter Collingbourne via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Why do we need a custom dumping format for the summary? Since we already
> need the YAML format anyway, wouldn't it be better to extend that to cover
> the entire summary?
>

IMO it is useful/convenient to be able to see the summary in the llvm-dis
output.
Teresa


> Peter
>
> On Fri, Jun 2, 2017 at 8:46 AM, Charles Saternos via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hey all,
>>
>> Below is the proposed format for the dump of the ThinLTO module summary
>> in the llvm-dis utility:
>>
>> > ../build/bin/llvm-dis t.o && cat t.o.ll
>> ; ModuleID = '2.o'
>> source_filename = "2.ll"
>> target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
>> target triple = "x86_64-unknown-linux-gnu"
>>
>> @X = constant i32 42, section "foo", align 4
>>
>> @a = weak alias i32, i32* @X
>>
>> define void @afun() {
>>   %1 = load i32, i32* @a
>>   ret void
>> }
>>
>> define void @testtest() {
>>   tail call void @boop()
>>   ret void
>> }
>>
>> declare void @boop()
>>
>> ; Module summary:
>> ;  testtest (External linkage)
>> ;    Function (2 instructions)
>> ;    Calls: boop
>> ;  X (External linkage)
>> ;    Global Variable
>> ;  afun (External linkage)
>> ;    Function (2 instructions)
>> ;    Refs:
>> ;      a
>> ;  a (Weak any linkage)
>> ;    Alias (aliasee X)
>>
>> I've implemented the above format in the llvm-dis utility, since there
>> currently isn't really a way of getting ThinLTO summaries in a
>> human-readable format.
>>
>> Let me know what you think of this format, and what information you think
>> should be added/removed.
>>
>> Thanks,
>> Charles
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>
>
> --
> --
> Peter
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>


-- 
Teresa Johnson |  Software Engineer |  tejohnson at google.com |  408-460-2413
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20170602/f68e98ac/attachment.html>