[PATCH] Add llvm.experimental.patchpoint.double

Philip Reames listmail at philipreames.com
Thu Oct 9 13:51:03 PDT 2014

Has that been sent for review?  I'd like to see that approach.

p.s. Return is actually the easy case.  You only need three versions 
since you can use anyptr, anyint, and anyfloat.  The complication comes 
with function types, which are (at least for now) only needed for the 

On 10/09/2014 01:46 PM, Andrew Trick wrote:
> Juergen has a tablegen patch that allows multiple return types on the 
> same intrinsic, which should do exactly what you want without any 
> extra name mangling.
> -Andy
>> On Oct 9, 2014, at 1:39 PM, Kevin Modzelewski <kmod at dropbox.com 
>> <mailto:kmod at dropbox.com>> wrote:
>> Oh interesting, that seems to work -- assuming that other people like 
>> the approach, would you mind factoring out that part of your 
>> statepoint patch?
>> On Thu, Oct 9, 2014 at 9:19 AM, Philip Reames 
>> <listmail at philipreames.com <mailto:listmail at philipreames.com>> wrote:
>>     On 10/08/2014 09:40 PM, Kevin Modzelewski wrote:
>>>     Hi atrick,
>>>     It didn't seem like there was anything special that had to be done besides
>>>     just defining the new intrinsic with the different return type.
>>>     It seems inelegant to create a new intrinsic for a new return type, but
>>>     we're running into a case where we'd like to return a double through a patchpoint
>>>     and I'm not sure of a better way to do that.
>>     You might want to take a look at how we defined the gc_result
>>     intrinsics in the statepoint patch which is currently up for
>>     review.  With some changes to the intrinsic name mangling, you
>>     can define an intrinsic per "family" of types.  The four we had
>>     to add were: void, int, pointer, float.  (float here means any
>>     floating point type, int means any integer type, etc..)
>>>     http://reviews.llvm.org/D5696
>>>     Files:
>>>        docs/StackMaps.rst
>>>        include/llvm/IR/Intrinsics.td
>>>        lib/CodeGen/SelectionDAG/FastISel.cpp
>>>        lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
>>>        lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
>>>        lib/IR/Verifier.cpp
>>>        lib/Target/AArch64/AArch64TargetTransformInfo.cpp
>>>        lib/Target/X86/X86TargetTransformInfo.cpp
>>>        test/CodeGen/X86/patchpoint.ll
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