similar to: [LLVMdev] Exploiting 'unreachable' for optimization purposes

On Oct 24, 2013, at 5:22 AM, Stephan Tolksdorf <st at quanttec.com> wrote: > Hi, > > When clang/llvm compiles the following sample (with -O2) it optimizes away the second comparison in test1 but not in test2. Is this handling of 'unreachable' by purpose, or is this just a shortcoming of the current optimization passes? GCC and MSVC (with the equivalent code using the

Hi Mark, I just dug out a bug from 2006 which since 2009 seems to also have covered efforts to make better use of unreachable for optimization purposes: http://llvm.org/bugs/show_bug.cgi?id=810 I've added a comment and assigned it to you as requested. Thanks, Stephan On 24.10.13 19:05, Mark Lacey wrote: > > On Oct 24, 2013, at 5:22 AM, Stephan Tolksdorf <st at

On Sun, May 11, 2014 at 8:19 AM, Stephan Tolksdorf <st at quanttec.com> wrote: > Hi, > > When clang/LLVM can't prove that a noexcept function only contains > non-throwing code, it seems to insert an explicit exception handler that > calls std::terminate. Why doesn't clang leave it to the eh personality > function to call std::terminate when an exception is thrown

On 02.02.14 00:48, Chandler Carruth wrote: > On Sat, Feb 1, 2014 at 8:35 AM, Stephan Tolksdorf <st at quanttec.com > <mailto:st at quanttec.com>> wrote: > > Hi, > > Currently the hashing implementation in ADT/Hashing.h produces hash > values on 32-bit platforms that differ from the lower 32-bits of the > hash values produced on 64-bit platforms.

Hi, Currently the hashing implementation in ADT/Hashing.h produces hash values on 32-bit platforms that differ from the lower 32-bits of the hash values produced on 64-bit platforms. It seems the only reason for this difference is that the uint64_t integer seed is truncated to size_t. Since the usage of uint64_t and size_t as types for seed values in the implementation is somewhat

On Thu, Mar 12, 2015 at 4:52 AM, Stephan Tolksdorf <st at quanttec.com> wrote: > > On 11.03.2015 23:02, Rui Ueyama wrote: > >> An idea to make the resolver faster would be to use a concurrent hash >> map to insert new symbols in parallel. Assuming symbols from the same >> file don't conflict each other (I think it's a valid assumption), this >> can

I am not seeing this happening, at least not for unreachables that follow calls to 'noreturn' functions. On Apr 14, 2014, at 3:48 AM, Anton Korobeynikov <anton at korobeynikov.info> wrote: > Hello > > x86 backend emits ud2 instruction in this case > > On Mon, Apr 14, 2014 at 1:46 PM, Vadim Chugunov <vadimcn at gmail.com> wrote: >> Hi, >> Is it

Hi, is there any way to execute scripts in R (Windows) without the script being copied to the console, so that only error messages are reported? Or to have a second console in parallel? Please. Not being able to hit the F10 button like in S-Plus seriously impairs my productivity (not only because it is slow and clutters my console history). And totally unrelated: Is there any chance that R

On 15.10.2008, at 3.42, Chris Lattner wrote: > > On Oct 14, 2008, at 12:52 PM, Tatu Vaajalahti wrote: > >> >> Hi, >> >> I don't know enough C to know for certain if this is a programmer or >> compiler error: > > Hi Tatu, > > With this information it is impossible to tell if it is your fault or > llvm's fault. Please file a bug with a

Tatu Vaajalahti wrote: > With this program llvm-gcc -O2 optimizes test2 away even though it's > address is taken in program (gcc-4.2 does not, neither does llvm-gcc > with -O or -O0): > > > #include <stdio.h> > > static const char test1 = 'x'; > static const char test2 = 'x'; > > int main(int argc, char **argv) > { >

On Tue, Apr 15, 2014 at 2:14 PM, Vadim Chugunov <vadimcn at gmail.com> wrote: > I've looked through LLVM codegen code and found that > SelectionDAGBuilder::visitUnreachable() is basically a no-op. So I don't > see how it could have generated anything... > > What would be the right way to go about adding this functionality? > Right now I am thinking to add

> With this program llvm-gcc -O2 optimizes test2 away even though it's > address is taken in program (gcc-4.2 does not, neither does llvm-gcc > with -O or -O0): I can confirm that test2 is replaced with test1 everywhere using llvm-gcc from svn head. > #include <stdio.h> > > static const char test1 = 'x'; > static const char test2 = 'x'; >

Hey all, I'm not sure if anyone has experienced this, and I have searched for it online, with no conclusive, err.. conclusions. Basically, when rsyncing two \test1(local) and \mnt\test2\ (NFS mount) it seems that when using rsync with --no-whole-file entire files (instead of just updated blocks) are sent through. I am using the following command rsync -avtz --no-whole-file \test1\

I am also testing rbox plugin ;) So I would like just the imaptest tool to work. No one else ever run into this? I saw something similar on the mailing list a long time ago. -----Original Message----- From: Daniel Miller via dovecot [mailto:dovecot at dovecot.org] To: dovecot at dovecot.org Subject: Re: Imaptest stall If you're just speed testing for writing probably sdbox or maildir

Hi How do I set the language of the GUI? With R 2.1.0 it suddenly changed to German and I want it to stay English. I couldn't find any setting to change. Regards, Stephan

Hi, I need to estimate the density at the mean of a sample of a few thousands data points with a dimesion up to 5. The data is uni-modal and regularly shaped. I couldn't find any kernel density package for R which supports more than 3 dimensions. Have I overlooked a package or does somebody have code for this purpose? Any other advice? Regards, Stephan

Hi, attached there is a prototype of patch for adding a new copy-attributes command. Such command would allow copy the attributes of a "file" to another, so for example in guestfish: copy-attributes foo bar permissions:true xattributes:false would only copy the permissions of foo to bar, not copying its extended attributes too. Just few notes: - my first daemon command, so

I am working with a dataset where there are 5 possible outcomes (coded 1:5), I would like to create 5 categorical variables (event1...event5). I am using a for loop an if statements, but I have a large dataset( approx 100,000 rows) it takes quite a bit of time, is there a way to speed this up? Here is some sample code of what I am currently doing. test2 <-rep(seq(1:5),2000) event1 <-

Hi I have this vector of strings. MyData <- c("Test1","Test2","I(Test1^2)","I(Test2^3)","I(Test1.Test2^2)") where I want to extract only the text after "I(" and before "^" so that the string returned only contain c("Test1","Test2","Test1.Test2") I am not very skilled in the use of matching

Hello - I just finished doing a search of the archives and couldn't seem to get this answered. Example, I have a root directory containing the following directories: /Test1 /Test2 /Test3 I want to rsync only /Test2 and all subdirs under. So my include-from file looks like: + Test2/* - /* This doesn't work as nothing is synced, and if I do a -vv it tells me that nothing is being