llvm dev - Aug 2014 - [LLVMdev] Linking/archiving bitcodes with module asm

Hello,

I'm archiving a number of bitcode files via gold plugin based on LLVM 3.4. 
  When I find a thumbv7 bitcode with a couple of module asms, I get a 
segfault in ARMAsmParser::parseDirectiveFnStart because getTargetStreamer 
returns NULL.  Frankly, I don't see how this is supposed to work because as 
far as I understood LTOModule::addAsmGlobalSymbols only creates a 
RecordStreamer which is then attached to the MCTargetAsmParser, and no 
TargetStreamer is ever created.

The places that explicitly call createAsmStreamer are only writing assembly 
as llvm-mc or cc1as.  I've tried to follow that scheme in 
addAsmGlobalSymbols but failed.  Any ideas?

Andrey

I think this has been fixed on trunk, can you confirm?

On 24 June 2014 03:19, Andrey Belevantsev <abel at ispras.ru>
wrote:
> Hello,
>
> I'm archiving a number of bitcode files via gold plugin based on LLVM
3.4.
> When I find a thumbv7 bitcode with a couple of module asms, I get a
segfault
> in ARMAsmParser::parseDirectiveFnStart because getTargetStreamer returns
> NULL.  Frankly, I don't see how this is supposed to work because as far
as I
> understood LTOModule::addAsmGlobalSymbols only creates a RecordStreamer
> which is then attached to the MCTargetAsmParser, and no TargetStreamer is
> ever created.
>
> The places that explicitly call createAsmStreamer are only writing assembly
> as llvm-mc or cc1as.  I've tried to follow that scheme in
> addAsmGlobalSymbols but failed.  Any ideas?
>
> Andrey
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

Hi Rafael,

On 09.08.2014 3:00, Rafael Espíndola wrote:
> I think this has been fixed on trunk, can you confirm?
I only have 3.4-based toolchain, so could you point me to the patches that 
fixed this?  I could try backporting them and then checking.  It's been 
some time ago, so I would need to dig up this example back.

Yours,
Andrey
>
> On 24 June 2014 03:19, Andrey Belevantsev <abel at ispras.ru> wrote:
>> Hello,
>>
>> I'm archiving a number of bitcode files via gold plugin based on
LLVM 3.4.
>> When I find a thumbv7 bitcode with a couple of module asms, I get a
segfault
>> in ARMAsmParser::parseDirectiveFnStart because getTargetStreamer
returns
>> NULL.  Frankly, I don't see how this is supposed to work because as
far as I
>> understood LTOModule::addAsmGlobalSymbols only creates a RecordStreamer
>> which is then attached to the MCTargetAsmParser, and no TargetStreamer
is
>> ever created.
>>
>> The places that explicitly call createAsmStreamer are only writing
assembly
>> as llvm-mc or cc1as.  I've tried to follow that scheme in
>> addAsmGlobalSymbols but failed.  Any ideas?
>>
>> Andrey
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev