similar to: [LLVMdev] X86 isTargetShuffle Question

Hello list, i am currently trying to implement tail call optimization in the X86 backend , so far i have it working for cases (modulo many unknown bugs :) where the tail called function is a destination within the source file and frame pointer elimination is performed. i implemented it as a dagcombiner transformation running in post legalized phase within the

I have the code below which gives me what I want for temp based on logvec but I was wondering if there was a shorter way ( i.e : a one liner ) without having to initialize temp to zeros. This is purely for learning purposes. Thanks. logvec <- c(TRUE,FALSE,FALSE,TRUE,FALSE,FALSE,TRUE,FALSE) temp<-numeric(length(invec)) temp[invec]<-which(invec) temp [1] 1 0 0 4 0 0 7 0 obviously, the

Hello list, I just started R today and tried something quite simple. I wanted to create a colored plot and eventually after hours of fiddling around got it working. However, my solution seems very suboptimal and I'd really appreciate your hints on how to improve. I believe that R already offers many functions I coded (e.g. distance between two vectors, vector length, vector normalization and

Can any one help it will be very kind, loop statements I have this table and some more records, I want to reshape it V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 TP53 Dis1 Dis2 Dis3 Dis4 Dis5 Dis6 DCI New1 New2 New3 New4 FDI Hi2 H3 H4 GHD I1 I3 I4 I5 I6 I7 I8 I want my new table or matrix to be some thing like this V1 V2 V3 Tp53 Dis1 Dis2 Tp53 Dis1 Dis3 Tp53 Dis1 Dis4 Tp53 Dis1 Dis5 Tp53 Dis1 Dis6 Tp53 Dis2

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Hello, Arnold. > with the sentence i tried to express the question whether there is a > way to persuade the code generator to use another register to load (or > move) the function pointer to (right before the callee saved register > restore) but thinking a little further that's nonsense. Why don't define some special op for callee address and custom lower it? I really

i learned that ntfs file system not supported by centos. and i try to tell my system version with uname -r and find my version is 2.6.9-22.EL so i download the kernel-module-ntfs-2.6.9-22.ELsmp-2.1.20-0.rr.9.10.i686.rpm but after rpm -ivh ..................... i do't know how to do? a article told me go to /usr/src/2.......... but i can't even find the dir . thanks for any help.

On May 1, 2009, at 2:47 PM, David Greene wrote: > On Friday 01 May 2009 13:46, Chris Lattner wrote: >> Right, a lot of these problems can be solved by some nice refactoring >> stuff. I'm also hoping that some of the complexity in defining >> shuffle matching code can be helped by making the definition of the >> shuffle patterns more declarative within the td file.

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Chris Lattner <clattner at apple.com> writes: >> We would still keep the existing pre-table-driven-isel passes so we'd >> still have a chance to do some cleanup before the main table-driven >> isel. >> >> Obviously a lot of details have to be worked out. > > I'm not seeing how this is useful for shuffles. Since tblgen doesn't > generate

been playing around a bit and noticed: When I login as root, gnome,? all the system sounds seem to be working. When I log in as a regelur user,? the system sounds do't.? So I guess it must be a permissions issue somewhere that happened during/after the last update? any ideas? thanks, Ron On 10/10/20 12:03 PM, R C wrote: > Hello, > > > I am using 'Centos 7.8.2003

Hi, The attached is the fix to radar://11663049. The optimization can be outlined by following rules: (select (x != c), e, c) -> select (x != c), e, x), (select (x == c), c, e) -> select (x == c), x, e) where the <c> is an integer constant. The reason for this change is that : on x86, conditional-move-from-constant needs two instructions; however,

On Mar 27, 2011, at 1:16 PM, David A. Greene wrote: > Chris Lattner <clattner at apple.com> writes: > >>> We would still keep the existing pre-table-driven-isel passes so we'd >>> still have a chance to do some cleanup before the main table-driven >>> isel. >>> >>> Obviously a lot of details have to be worked out. >> >>

On Wed, Jul 27, 2011 at 3:50 PM, Matt Johnson <johnso87 at crhc.illinois.edu> wrote: > Hi Eli, > > On 07/27/2011 04:59 PM, Eli Friedman wrote: >> >> On Wed, Jul 27, 2011 at 2:28 PM, Matt Johnson >> <johnso87 at crhc.illinois.edu>  wrote: >>> >>> Hi All, >>>     I'm writing a backend for a target which only supports 4-byte,

The AVX saga continues. I am attempting to write a pattern for VEXTRACTF128 but am having some problems. My attempt looks something like this: defm EXTRACTF128 : avx_fp_extract_vector_osta_node_mri_256<0x19, MRMDestReg, MRMDestMem, "extractf128", undef, X86f32, X86i32i8, // rr [(set VR128:$dst,

On Dec 2, 2009, at 3:46 PM, David Greene wrote: > Well, it's right! So how do I express this kind of thing? Since LLVM 2.5 > shufflevector supports creating a vector of a difference size than the > inputs. Which is exactly what we need for VEXTRACTF128 and VINSERTF128. I think the SelectionDAG vector_shuffle node still requires the vector types to match. The LLVM IR shuffles can

Hi Anton and Dale first thanks for your answers. On 8 Aug 2007, at 16:43, Anton Korobeynikov wrote: > Hello, Arnold. > >> Is there a way to indicate that the register the tail call >> instruction uses as destination needs to be valid after the callee >> saved registers have been restored? (some X86InstrInfo.td foo magic >> maybe ?) > It's wrong way to do the

Sent from my iPhone On Aug 8, 2007, at 10:46 AM, Arnold Schwaighofer <arnold.schwaighofer at gmail.com > wrote: > Hi Anton and Dale > first thanks for your answers. > > On 8 Aug 2007, at 16:43, Anton Korobeynikov wrote: > >> Hello, Arnold. >> >>> Is there a way to indicate that the register the tail call >>> instruction uses as destination

How can I prevent some nodes from being combined in DAGCombine.cpp? Maybe what I want to do below doesn't follow the philosophy of LLVM, but I'd like to know if there is any way to avoid node from being combined. TargetLowering::PerformDAGCombine() is only called if DAGCombiner cannot combine a specific node. It seems that there is no chance to stop it from combining a node. I need the

I have a few questions about the new vector shuffle matching code in the x86 .td files. It's a big improvement over the old system and provides the context that code generation for AVX needs. This is great! I'm asking because I'm having some trouble converting some AVX patterns over to the new system. I'm getting this error from tblgen: VyPERM2F128PDirrmi: (set:isVoid