[llvm-dev] Stack maps on AArch64

[Juergen Ributzka via llvm-dev]

[+ Lang]

> On Jun 13, 2016, at 9:58 AM, Philip Reames via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> 
> Andy, Juergen,
> 
> I don't know enough about AArch64 to assess here.  Is the proposed change below something we should take in tree?  I'm happy to do the mechanics of posting a patch (if Rob doesn't), but I don't know enough to assess.  Would such a patch be self contained?  Or is there other work needed?
> 
> Philip
> 
> On 05/26/2016 12:28 PM, Rob Lyerly via llvm-dev wrote:
>> I figured out the issue -- the AArch64 backend only emits the stack map section if isOSBinFormateMachO() returns true -- see [1], lines 123 - 134.  Moving the call to serializeToStackMapSection() outside of the conditional fixes the problem.
>> 
>> [1] http://llvm.org/doxygen/AArch64AsmPrinter_8cpp_source.html <http://llvm.org/doxygen/AArch64AsmPrinter_8cpp_source.html>
>> 
>> On Thu, May 26, 2016 at 2:46 PM, Rob Lyerly <rlyerly at vt.edu <mailto:rlyerly at vt.edu>> wrote:
>> Hi everyone,
>> 
>> I'm using LLVM's stack map intrinsic to store value location information.  I've got a pass that automatically inserts the "llvm.experimental.stackmap" intrinsic into the IR.  On x86-64, an ".llvm_stackmaps" section is successfully emitted (I can see the section & its contents in the generated assembly).  However I can't get the AArch64 backend to generate this section.  On the website with information about the intrinsic [1], it says that AArch64 is supported.  Is there a flag I need to add, or is there something I need to enable when building LLVM to get this support?
>> 
>> [1] http://llvm.org/docs/StackMaps.html <http://llvm.org/docs/StackMaps.html>
>> 
>> -- 
>> Rob Lyerly
>> Graduate Research Assistant, Systems Software Research Group
>> 
>>     
>> 
>> 
>> 
>> -- 
>> Rob Lyerly
>> Graduate Research Assistant, Systems Software Research Group
>> 
>>     
>> 
>> 
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