search for: intriniscs

...ort. E.g. ISTR comments about not wanting to rewrite vec_selects because it can be hard to synthesise optimal sequences from a single canonical form. But I might have got that wrong. Also, llvmpipe uses intrinsics for some things, so it might be strange if we decompose IR operations but leave the intriniscs alone. I'd half wondered whether, as an extension, the pass should split wide vectors into supported widths. I hadn't thought about the possiblity of decomposing everything and them reassembling it though. I can see how that would cope with more cases, like you say. Thanks, Richard

I want to write a simple backend-specific instrinsic that will just call an instruction. How should I do that? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180924/7faeeb3d/attachment.html>

On 25 October 2013 11:06, Richard Sandiford <rsandifo at linux.vnet.ibm.com>wrote: > I wanted the same thing for SystemZ, which doesn't have vectors, > in order to improve the llvmpipe code. > Hi Richard, This is a nice patch. I was wondering how hard it'd be to do that, and it seems that you're catching lots of corner cases. My interest is also due to converting odd

To my knowledge that intrinsic IS generated by frontends like Clang when using _builtin_return_address(), i could be wrong though Zhang > 在 2018年9月5日，10:47，Bekket McClane via llvm-dev <llvm-dev at lists.llvm.org> 写道： > > and

...ents about not wanting > to rewrite vec_selects because it can be hard to synthesise optimal > sequences from a single canonical form. But I might have got that wrong. > Also, llvmpipe uses intrinsics for some things, so it might be strange > if we decompose IR operations but leave the intriniscs alone. The issue of intrinsics and vectorization was discussed some time ago. There it might be better to devectorize to a scalar version of the instrinsics (if available) as at least the loopvectorizer can vectorize also a set of selected intrinsics, and the target might have direct machine instr...

.../doxygen/html/Function_8cpp.html also */ >> IIT_V128 = 37, >> IIT_V256 = 38 >> }; >> >> I ask because enum IIT_Info has some values that are not >> consecutive for vector types >> for intrinsics (used e.g. in include/llvm/IR/Intriniscs*.td). >> Although not important, I wonder why do I still need to define >> them again (since these >> values are basically already defined in ValueTypes.td) ? >> >> >> So, I managed to get the code compiled. I had issues because I did >> not synch...

...t be > defined in llvm.org/docs/doxygen/html/Function_8cpp.html also */ > IIT_V128 = 37, > IIT_V256 = 38 > }; > > I ask because enum IIT_Info has some values that are not consecutive for vector types > for intrinsics (used e.g. in include/llvm/IR/Intriniscs*.td). > Although not important, I wonder why do I still need to define them again (since these > values are basically already defined in ValueTypes.td) ? > > > So, I managed to get the code compiled. I had issues because I did not synchronize the > following code: >...

...anting >> to rewrite vec_selects because it can be hard to synthesise optimal >> sequences from a single canonical form. But I might have got that wrong. >> Also, llvmpipe uses intrinsics for some things, so it might be strange >> if we decompose IR operations but leave the intriniscs alone. > > The issue of intrinsics and vectorization was discussed some time ago. > There it might be better to devectorize to a scalar version of the > instrinsics (if available) as at least the loopvectorizer can vectorize > also a set of selected intrinsics, and the target might h...

Hi all, A while back we started annotating intrinsics with new attributes ( https://reviews.llvm.org/D65377) After some discussion it was decided it would be good to have an `opt-out` attribute list for intrinsics. Some attributes that can be added to the list could be: nosync, nofree, nounwind, willreturn For now, there are 2 approaches: 1. Filtering opt-out attributes in tablegen source (

Hello. I've managed to patch the various files from the back end related to lanemask - now I have 1024-bit long lanemask. But now I get the following error when giving make llc: <<error:unhandled vector type width in intrinsic!>> This error comes from this file https://github.com/llvm-mirror/llvm/blob/master/utils/TableGen/IntrinsicEmitter.cpp, comes from the

I just installed the pre-compiled binaries for Clang 3.4.1, which was the latest version I could find to download. Starting a new 'blank' project in MSVC I was easily able to change the tool set from MS Visual Studio 2013 (v120) to LLVM-vs2013. However, trying to compile a simple 'hello world' program resulted in the following compiler errors. Is there something simple I am