similar to: Flac-dev Digest, Vol 45, Issue 2

On Tue, May 6, 2008 at 4:52 PM, Christopher Peplin <chris.peplin at rhubarbtech.com> wrote: > Along the same line as Frederick, myself and another university student were able to implement a multi threaded FLAC > encoder, but using Intel's Threading Building Blocks (TBB) package. We saw similar near-linear speedup. Great! Your approach is better in that it bounds the memory

That's true, TBB is limited in compatibility. I don't necessarily think that's where a parallel FLAC API should head, but they're something to be said for Intel's increasing openness with the project and the pipeline design itself. The pipeline could possible be ported to pthreads. Our project was conceived as a way to learn TBB by doing, so we didn't put any time/thought

Hello, I am building the SPEC 2006 Benchmark with Clang as the compiler. I have written a function pass in LLVM and I am trying to run that for SPEC by invoking the pass in the build options of SPEC. The build options of SPEC are in a *.cfg config file, which allows us to specify the choice of compiler while building SPEC. (https://www.spec.org/cpu2006/Docs/install-guide-unix.html) The pass

Hey FLAC devs, I managed to hack out a proof-of-concept multithreaded FLAC encoder based on the example libFLAC one. It turned out to be fairly straightforward to get near-linear speedup; I can encode a 636 MB wave file in 6.8s with 8 threads on an 8-core 3.0 GHz Xeon vs. 31.4s with a single thread. Basically I mmap() the input file, divide up the mmap()ed region into nearly equal pieces,

Evan, et al., I've come across a small issue when using the if conversion pass in PPC to generate conditional returns. Here's a small example: ** Before if conversion ** BB#0: derived from LLVM BB %entry %R3<def> = LI 0 %CR0<def> = CMPLWI %R3, 0 BCC 68, %CR0, <BB#3> Successors according to CFG: BB#3(16) BB#1(16) BB#1: derived from LLVM BB

Hi all, I've been investigating a machine verifier failure on the attached testcase, and I'm tempted to say the verifier is wrong and should accept it. Skip the description for the proposed change. On AArch64, the verifier complains with: *** Bad machine code: MBB exits via unconditional branch but doesn't have exactly one CFG successor! *** - function: t4 - basic

Hi all, I'm trying to use the FLAC C libraries to encode audio. I'm doing something like: FLAC__seekable_stream_encoder_set_channels(pflac->fse, 1); FLAC__seekable_stream_encoder_set_sample_rate(pflac->fse, 11025); FLAC__seekable_stream_encoder_set_bits_per_sample(pflac->fse, 8); if ((bps = FLAC__seekable_stream_encoder_init(pflac->fse)) !=

--- Erik de Castro Lopo <erikd-flac@mega-nerd.com> wrote: > Hi all, > > I'm trying to use the FLAC C libraries to encode audio. > > I'm doing something like: > > FLAC__seekable_stream_encoder_set_channels(pflac->fse, 1); > FLAC__seekable_stream_encoder_set_sample_rate(pflac->fse, 11025); >

On Tue, May 6, 2008 at 2:03 PM, Brian Willoughby <brianw at sounds.wa.com> wrote: > Frederick, > > This is great news! Thanks for your effort. > > Your proof-of-concept raises a few questions for me: > > 1) I know that the ratio of uncompressed to compressed data is > unpredictable, but I never really considered whether the input block size or > the output

Hal, Andrey, Alexey, >From the LLVM design viewpoint, there is a fundamental problem with both Hal's approach and the Intel approach: both are quite language-specific. OpenMP is a particular parallel language, with particular constructs (e.g., parallel regions) and semantics. LLVM is a language-neutral IR and infrastructure and OpenMP-specific concepts should not creep into it. I've

I am working on a back end for an architecture whose jump via table instruction includes the range check. If the index is out of range, the jump table instruction just falls through. I implemented a pass to remove the range check generated before the jump table instruction because it is superfluous. This causes as assertion in MachineBlockPlacement.cpp:

Hello! The if-converter tries to match 'Simple' patterns looking like this: // Simple (split, no rejoin): // EBB // | \_ // | | // | TBB---> exit // | // FBB The IfConverter::ValidSimple method (lib/CodeGen/IfConversion.cpp:461) checks if TBB matches this pattern. It basically does this by simply checking if AnalyseBranch fails on

On Jul 29, 2013, at 6:50 AM, Chad Rosier <chad.rosier at gmail.com> wrote: > Hi Jakob, > You're the unfortunate soul who last touched the constant island pass, right? Do you happen to have any insight for Daniel? Sorry, no. I don't remember working with that particular bit of code. You could try digging through the commit logs. Thanks, /jakob > On Tue, Jul 23, 2013 at

Attempting to build llvm on Mageia2 from the 3.3 source I get: "#include "..." search starts here: #include <...> search starts here: /home/mgeldiener/dev/clang/build/include /home/mgeldiener/dev/clang/build/lib/Support /home/mgeldiener/vcs/llvm/include /home/mgeldiener/vcs/llvm/lib/Support /opt/intel/composerxe-2011.5.220/mkl/include

I am sure quite a number of packages not supported in the distribution are easy to build and install into /usr/local/bin and such. It is not that it is easy to defeat the standard distribution and update procedures as that doing so puts that software out of sync with the standard update procedure. From then on the distribution update for cmake has no effect. I suspect there are fairly rigid

In looking at the code in ARMConstantislandPass.cpp::optimizeThumb2JumpTables(), I see that there is the following condition for not creating tbb-based jump tables: // The instruction should be a tLEApcrel or t2LEApcrelJT; we want // to delete it as well. MachineInstr *LeaMI = PrevI; if ((LeaMI->getOpcode() != ARM::tLEApcrelJT &&

On Tue, 2 Oct 2012 14:28:25 +0000 "Adve, Vikram Sadanand" <vadve at illinois.edu> wrote: > Hal, Andrey, Alexey, > > From the LLVM design viewpoint, there is a fundamental problem with > both Hal's approach and the Intel approach: both are quite > language-specific. OpenMP is a particular parallel language, with > particular constructs (e.g., parallel

Hi, We at Rust are using LLVM for our codegen. Since Rust version 1.19.0, which should ship in July 21st, we are using a slightly patched version of LLVM 4.0. The transition to LLVM 4.0 had been fairly pain-free on x86 (at least excluding the standard suite of assertion failures using MSVC SEH, but that's fairly under control), but we have encountered several scary bugs in ARM, most

I was hoping to get feedback on this proposal formatted as a patch. I'd like to teach AnalyzeBranch to handle conditional returns on PPC, but the currently documented API for AnalyzeBranch doesn't support it. I propose the following enhancement to the API so that I can teach AnalyzeBranch about conditional return instructions. ---------- Forwarded message ---------- From: Kyle Butt

I am using Ubuntu 10.04 LTS and the wine1.3 ppa (https://launchpad.net/~ubuntu-wine/+archive/ppa). I upgraded this morning using the normal update manager, and I went to run Photoshop CS5 which has been working flawlessly for months, it broke. According to /var/log/apt/term.log I updated from wine1.3.26 to wine1.3.28. I get this error: Code: wine: Call from 0x7b83b332 to unimplemented function