similar to: [LLVMdev] [cfe-dev] want to intercept array dereferences

If I understand correctly, LLVM is a *typed* assembly language. Could I just look for a pointer type plus an integer type followed by a dereference? That would catch both a[n] and *(a+n). Gry On Tue, Apr 7, 2015 at 10:46 PM, Bruce Hoult <bruce at hoult.org> wrote: > Far too late. That would need to be in Clang. > > On Wed, Apr 8, 2015 at 5:36 PM, Gry Gunvor <gry.gunvor at

Normally for int n unknown at static time, "a[n]" and "*(a+n)" results in an add and then a dereference. I want instead for it to compile to a system call that takes two arguments, a and n. Where should I intercept this in LLVM? Gry

I tried half a gig and that didn't work. I just want to know before I go buy a new machine. Gry

I'm just getting started changing the emitted code. Suppose I want to just add one new instruction to the function prologue at the top. Where would I do this? Does it depend on the backend? I'm targeting RISCV64. Gry

"Craig Topper" <craig.topper at gmail.com> wrote: > None of the "si" division routines will be used by x86. That was my expectation too. > They exist for targets that don't support the operations natively. > X86 supports them natively so will never use the library functions. So they SHOULD not be built (or at least not shipped) with the builtins library

Hi @ll, LLVM-7.0.0-win32.exe contains and installs lib\clang\7.0.0\lib\windows\clang_rt.builtins-i386.lib The implementation of (at least) the multiplication and division routines __[u]{div,mod,divmod,mul}[sdt]i[34] shipped with this libraries SUCKS: they are factors SLOWER than even Microsoft's NOTORIOUS POOR implementation of 64-bit division shipped with MSVC and Windows! The reasons: 1.

Hi! When I'm trying to run wine (I've tried many compilations), I got something like that: wineserver: /root/.wine/config is not a valid registry file Why I'm not using /etc/wine.conf, /usr/etc/wine.conf or /usr/local/etc/wine.conf? Because wineserver wants only $HOME/.wine/config... When I delete this file wineserver 'says' that I don't have configuration file (even

"David Greene" <dag at hpe.com> wrote: > Stefan Kanthak via llvm-dev <llvm-dev at lists.llvm.org> writes: > >> "Michael Kruse" <llvmdev at meinersbur.de> wrote: >> >>> I think David is not referring to the capitalization of file names, but to >>> "DUPLICATE", "WASTING", "NOT AMUSED",

Objects compiled for the MS-ABI don't conform to it! Data types beyond 64 bit MUST BE returned by the callee via the hidden first argument allocated by the caller, NOT in XMM0! Demo/proof: from this source --- llvm-bug.c --- #ifndef __clang__ typedef struct { unsigned __int64 low; unsigned __int64 high; } __uint128_t; #else __attribute__((ms_abi)) #endif __uint128_t

Hi, [ouch, it take me a year? thank you all for this very interesting thread that I'm going to finish reading now.] Pete Batard via Syslinux: > I'll skip the EFI part of tails (that uses grub/EFI) to talk only > about the BIOS/Syslinux part. JFTR Tails uses GRUB only for 32-bit UEFI. We use syslinux for BIOS and 64-bit UEFI. > So, one thing Rufus will need to do is find a

"Philip Reames" <listmail at philipreames.com> wrote: > Stefan, > > I can't tell if you're intentionally trolling, or are simply oblivious, > but to this observer you have clearly crossed well over the line of > acceptable behavior. Since you seem to have some experience in taking the point of view of a third person: do you find LLVM's

Hi @ll, while clang/LLVM recognizes common bit-twiddling idioms/expressions like unsigned int rotate(unsigned int x, unsigned int n) { return (x << n) | (x >> (32 - n)); } and typically generates "rotate" machine instructions for this expression, it fails to recognize other also common bit-twiddling idioms/expressions. The standard IEEE CRC-32 for "big

Hello. I have a problem regarding the output from the R plot window. I have a quite dense dendrogram that I wish to visualize using a suitable software (like Illustrator), and to accomplish that I right click on the image from the plotting device and I save as metafile. The problem is when I scale up the image, some of the vectors in the dendrogram image are inseparable. My question is if

Hey oh i'm using one Ubuntu 12.04, and i set up a radio server automatized with airtime. The problem is, even i don't have any problem checking the airtime site or the icecast web service by my web browser, when i install my radio online player, which is basicaly a .html page with javascript & html language inside, the icecast web service can't find it, the same setup i use it on

On 30 Jul 2014, at 21:29, Ulrich Weigand wrote: > The ELFv1 ABI is used on 64-bit big-endian Linux and AIX. There's one small difference between the two: with the 64 bit ELFv1/ SVR4 ABI, tail padding for structs passed by value is only performed in case the struct is larger than 8 bytes, while for AIX 64 bit it's always done. As an aside, on Darwin/ppc64 it's done if the

"Michael Kruse" <llvmdev at meinersbur.de> wrote: > I think David is not referring to the capitalization of file names, but to > "DUPLICATE", "WASTING", "NOT AMUSED", "BOGUS" etc. I EMPHASIZE in the only way possible with plain text. > It should be possible to report problems in a professional manner. It should also be possible

In dovecot-2.1 hg you can now test dsync-based replication. Everything isn't finished yet, but it appears to work and I've enabled it for my @dovecot.fi mails. Some issues: - public namespace isn't replicated at all - shared namespace is replicated, but not private mail flags - I've only tested SSH replication setup now, not director replication setup (and director setup

Hi, I've ran my static checker Calysto on openssh and found the following bug: Possible NULL-ptr deref (vc536): @/work/benchmarks/SOURCES/openssh-4.6p1/moduli.c:173 + ptr gtm returned from gmtime dereferenced without checking (gmtime can return NULL). There are probably more possible NULL-ptr dereferences, but Calysto currently does not check the usage of library functions (for instance, if

"Tim Northover" <t.p.northover at gmail.com> wrote: > Hi Stefan, > > On Mon, 26 Nov 2018 at 12:37, Stefan Kanthak via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> LLVM/clang generates wrong code for the following program >> (see <https://godbolt.org/z/UZrrkG>): > > It looks like all of these issues come down to mismatched

Hi I have two questions regarding the meaning of intercept outputs of lm. Question 1: In data set 1 (a fully-balanced design), the line with (Intercept) contains the overall mean, and the estimates contain the differences from the overall mean (matching those from model.tables). But in data set 2, the line with the intercept does not correspond to the overall mean and the estimates don't