[llvm-dev] aarch64 does not emit DW_AT_Location

[kamlesh kumar via llvm-dev]

Adrian,
There was an existing entry for same
https://bugs.llvm.org/show_bug.cgi?id=40709


On Wed, Jan 22, 2020 at 6:44 AM kamlesh kumar <kamleshbhalui at gmail.com>
wrote:

> Adrian,
> Yes it is unoptimized.I will file a bug for this.
>
> Thanks
>
>
> On Wed, Jan 22, 2020, 1:40 AM Adrian Prantl <aprantl at apple.com> wrote:
>
>> If this is unoptimized code this is definitely a bug, with optimizations
>> it may not be possible to do any better. In both cases it's worth filing a
>> bug and attaching a clang reproducer (by running clang through env
>> FORCE_CLANG_DIAGNOSTICS_CRASH=1).
>>
>> -- adrian
>>
>> On Jan 21, 2020, at 3:54 AM, kamlesh kumar via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>
>> Hi Devs,
>> debug info emitted by llvm does not contain DW_AT_Location for Formal
>> parameter
>> if it is an aggregate like below case
>> 1) aggregate contain more than 4 homogeneous and size more than 128 bits
>> i.e.
>> typedef struct{
>> int a,b,c,d,e;
>> }mystruct;
>> void foo(mystruct ms){
>> }
>>
>> 2) aggregate contain hetrogeneous type and size more than 128 bits.
>> i.e.
>> typedef struct{
>> int a,b;
>> float c,d,e;
>> }mystruct;
>> void foo(mystruct ms){
>>
>> }
>>
>> This occur only when aarch64 is used, not with arm and x86.
>> like to know community thoughts wether this can be considered as bug or it
>> 's an abi restriction.
>>
>>
>> ./kamlesh
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
>>
>>
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