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

In qxl_crtc_atomic_flush(), there is an if statement on line 376 to check whether crtc->state is NULL: if (crtc->state && crtc->state->event) When crtc->state is NULL and qxl_crtc_update_monitors_config() is call, qxl_crtc_update_monitors_config() uses crtc->state on line 326: if (crtc->state->active) and on line 358: DRM_DEBUG_KMS(...,