similar to: [cfe-dev] When to use '-mcpu' versus '-march'

Hi Martin, On Tue, Mar 20, 2018 at 1:18 PM Martin J. O'Riordan <MartinO at theheart.ie> wrote: > Thanks Eric, > > > > After the original reply to my query I had a good look at the GCC > documentation for these options, and what I discovered is that “there is no > consensus” in GCC. Basically, saying do what GCC does was a non-answer as > it clarified nothing.

Thanks very much Eric for taking the time to carefully explain this to me. So if I am the author of the backend for a new processor technology, or willing to modernise my existing implementation, you would recommend that the ‘-mcpu’ option is deprecated and probably best not used at all, or perhaps just as a synonym for ‘-march + -mtune’? The first part of the target triple guides the

Hi, Recently, I committed a patch adding default features for '-mcpu'. And after that, Eric replied me here's a proposal toward using '-march' instead of '-mcpu'. As it's half a year later from original proposal, some background may changes. One thing worth to mention is, during this time, Apple Contributed its backend and introduced another new CPU type: cyclone.

Hi all, I compiled 64-bit R on an Apple Mac G5 running OS X, but it failed make check. Simon Urbanek suggested I post results to R-devel. > On Nov 6, 2007, at 10:23 PM, Steven McKinney wrote: > > > Hi Simon, > > > > Would you be able to give more guidance on how to compile 64-bit > > libiconv for Tiger, > > You can get the sources from Apple and compile

Hi Martin, On Fri, 3 Aug 2018 at 14:10, Martin J. O'Riordan <MartinO at theheart.ie> wrote: > $ git branch --list > * master > martino By default "git branch" only lists local branches. "git branch -a" will list all of them, including (for me) "remotes/origin/release_70". If you just type "git checkout release_70" git will

Yes, it looks like passing ‘EnableVec’ and ‘EnableSLPVec’ to ‘Args.hasFlag’ should be replaced with ‘false’ and then it has the expected behaviour. MartinO From: cfe-dev [mailto:cfe-dev-bounces at lists.llvm.org] On Behalf Of Martin J. O'Riordan via cfe-dev Sent: 01 March 2018 18:02 To: 'Richard Smith' <richard at metafoo.co.uk> Cc: 'Clang Dev'

Thanks Tim, Sometimes my hacks last longer than I want as it isn't always apparent how I can implement it properly. At the moment I am looking at changes I need to 'MachineBasicBlock::ReplaceUsesOfBlockWith'. It is most likely that I need to handle the issue in a different way, but the change I need works here for my target for the time being, but breaks X86 which I also build for

Hi David, When I use CMake to configure, ‘zlib’ and its header are detected - I build on CentOS 6.5 or CentOS 7. Since I run CMake from the command-line, I tried added ‘-DLLVM_ENABLE_ZLIB=0’ and ‘-DLLVM_ENABLE_ZLIB=1’ (using ‘-DLLVM_ENABLE_ZLIB=ON’ does not seem to work). Both ‘clang’ and ‘llvm-profdata’ (and all other tools and utilities) are configured and built together, in any event,

There's always the hypothetical template<typename T> llvm::Triple giveMeATripleDamnYou(const T &); Just keep adding implementations until you stop needing to. ;-) Cheers. Tim. On 1 January 2018 at 17:00, Martin J. O'Riordan <MartinO at theheart.ie> wrote: > Thanks Tim, > > Sometimes my hacks last longer than I want as it isn't always apparent how I can

We discovered what is happening. SDAGCombiner essentially looks at various combinations of nodes to do with vectors, and when it can, it creates a vector shuffle. The problem is, that our vector shuffle lowering builds new trees with vector element, or vector sub-vector insert sequences. The generic DAGCombiner, reconstructs these into a new shuffle, and so the loop continues - we reduce it,

> On Jan 16, 2018, at 11:31 PM, Martin J. O'Riordan <MartinO at theheart.ie> wrote: > > Thanks Matthias, > > I have both a pre-RA and a post-RA scheduler, and I had thought that I could track “has RA happened?” by setting a flag in my pre-RA scheduler as it completes - my suspicion (which you have confirmed) was that “#vregs == 0” was not a safe assumption. What I

Hi Martin, On 25 September 2017 at 20:35, Martin J. O'Riordan <MartinO at theheart.ie> wrote: > Are you building a Debug or Release version of the compiler? It seems that in Release builds of LLVM 5.0 the dump() implementation is absent, although the method is available in the interface. This is plain wrong in my view. If the dump() has to be removed then it should not be present

We'll be doing something similar for our OpenVMS port.  Right now I'm using "AsmStreamer->GetCommentOS()" and writing to the stream at the assembler level but that gets aligned on a right-side column (the column is hardcoded) and you have to be in verbose mode.  So if you come up with something or have a quick design, post it so perhaps we can leverage each other's work. 

I knew I'd regret leaving that option in for the MIPS port back in 99. Basically this is the only acceptable way for mcpu to exist, but should never have been added to the GCC aarch64 port at all since there's no compatibility with existing build systems to worry about. I would still like you to show this mythical piece of software that needs this compatibility. -eric On Jan 8, 2014 3:06

Hi Matt Your method is the easiest way for me to install the 64-bit R. I followed the directions on your web site and then did the following: R --arch=x86_64 source("http://bioconductor.org/biocLite.R") biocLite(type = "source",lib = "/Library/Frameworks/R.framework/Versions/2.8/Resources/RLib64") I got many errors and warnings which I copied to the attached file.

Yes, if it is in the interface it would make more sense to have a null implementation at the very least. In my out-of-tree target, I also removed them from the interface if the build was for Release to ensure that I got compile-time errors to reveal other places I might have otherwise missed. All the best, MartinO -----Original Message----- From: Dibyendu Majumdar [mailto:mobile at

Hi Tim, 2014-06-25 15:26 GMT+08:00 Tim Northover <t.p.northover at gmail.com>: > Hi Kevin, > > I assume you've looked at the GCC documentation in this area, since > your ideas are very similar: > https://gcc.gnu.org/onlinedocs/gcc/AArch64-Options.html. I actually > think that looks like a rational set of conventions too. > > The main difference appears to be

Martin: It sounds like you are doing is more akin to shuffle selection than fusion and therefore it's a better fit for instruction selection than DAGCombining. Try movign it to <Target>ISelDAGToDAG's Select (or potentially PreprocessISelDAG). Th -Nirav On Tue, Mar 6, 2018 at 4:05 PM Martin J. O'Riordan <MartinO at theheart.ie> wrote: > We discovered what is

>From http://bugs.r-project.org/cgi-bin/R: If you are not sure whether you have observed a bug or not, it is a good idea to ask on the mailing list R-Help by sending an e-mail to r-help at stat.math.ethz.ch rather than submitting a bug report. I'm wondering whether to submit a bug report on this: ============================================================== >

set LLVM_ENABLE_ZLIB=ON with cmake invocation. zlib should be installed and zlib.h header file needs to be in the header search path. Is your llvm-profdata tool built together with clang? David On Tue, Jul 18, 2017 at 1:04 PM, Martin J. O'Riordan via llvm-dev < llvm-dev at lists.llvm.org> wrote: > How can I build the profile reader with ZLIB support enabled? I configure > and