similar to: Dead store elimination in the backend for -ftrivial-auto-var-init

On Thu, Aug 1, 2019 at 6:09 PM JF Bastien <jfbastien at apple.com> wrote: > > Hi Alexander, > > The code doesn’t compile. Could you send a godbolt.org link that shows the issue? Sorry about that, here's the link: https://godbolt.org/z/-PinQP Lines 4 to 8 are initializing |acpar|. If I'm understanding correctly, the store to 8(%rsp) at line 7 can be removed because of the

On Thu, Aug 1, 2019 at 6:38 PM JF Bastien <jfbastien at apple.com> wrote: > > > > > On Aug 1, 2019, at 9:20 AM, Alexander Potapenko <glider at google.com> wrote: > > > > On Thu, Aug 1, 2019 at 6:09 PM JF Bastien <jfbastien at apple.com> wrote: > >> > >> Hi Alexander, > >> > >> The code doesn’t compile. Could you send

There are two problems: 1. padding after union and call to q(), without LTO we can't remove that store. 2. shortcut which I have which ignores all instructions q() . this assume that memset to acpar.match, acpar.matchinfo also useful which is not true. I should be able to improve this case. On Thu, Aug 1, 2019 at 11:29 PM Vitaly Buka <vitalybuka at google.com> wrote: > On a first

On Mon, Apr 15, 2019 at 11:02 PM Amara Emerson via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > On Apr 15, 2019, at 1:51 PM, Vitaly Buka via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > Hi JF, > > > > I've heard that you are interested DSE improvements and maybe we need to be in sync. > > So far I experimented with

> On May 10, 2019, at 8:59 PM, Vitaly Buka via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Sorry for delay, I was busy with other stuff. > CTMark results. > > dse is the current DSE. > dsem is my experimental module level DSE. > dsem runs after dse, so it's additionally deleted stores. > > -O3 > dse - Number of stores deleted

Can you post numbers for how many stores get eliminated from CTMark? > On Apr 16, 2019, at 11:45 AM, Vitaly Buka <vitalybuka at google.com> wrote: > > I tried -Os and effect of new approach significantly increases. > I run regular DSE and immediately myDSE. With -Os myDSE removes more than 50% of DSE number. > Which is expected as -Os inlines less and regular DSE can't

Hi JF, I've heard that you are interested DSE improvements and maybe we need to be in sync. So far I experimented with following DSE improvements: * Cross-block DSE, it eliminates additional 7% stores comparing to existing DSE. But it's not visible on benchmarks. * Cross-block + Interprocedural analysis to annotate each function argument with: - can read before write - will

On Tue, Sep 18, 2018 at 1:56 AM Adrian Prantl <aprantl at apple.com> wrote: > > > > > On Sep 17, 2018, at 6:59 AM, Alexander Potapenko via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > > (I think I've asked a similar question off-list a couple of times, but > > never got an answer) > > > > Hi folks, > > > > For [K]MSAN

(I think I've asked a similar question off-list a couple of times, but never got an answer) Hi folks, For [K]MSAN we need to figure out which inlined function a local var originally belonged to in the source file. E.g. when a local buffer %buf is declared in @bar(), but @bar() is inlined into @foo(), then there's a local %buf.i in @foo(), but we need to determine that the local came from

Hi all, I'm trying to figure out which parameters of a given InlineAsm instruction are its inputs, and which are the outputs (rationale: make sure MSan doesn't check the output parameters of an asm() statement). As far as I understand, this information is only available through the ConstraintInfoVector for the InlineAsm. However there's no exact match between the constraints and the

Hi Alex Thanks for your email. But it seems not work. I removed the -fsanitize=address flag. The global buffer overflow message doesn't show. However, no *.sancov file is created after I run perlbench. Thus, I could not get the BB coverage. Do you have any ideas? Many Thanks Regards Muhui Alexander Potapenko <glider at google.com> 于2018年9月5日周三 下午7:14写道： > Hi Muhui, > > If

Could you provide an example where MSan checks an output parameter? On Fri, Mar 16, 2018 at 9:53 AM, Alexander Potapenko via llvm-dev <llvm-dev at lists.llvm.org> wrote: > Hi all, > > I'm trying to figure out which parameters of a given InlineAsm instruction > are its inputs, and which are the outputs (rationale: make sure MSan > doesn't check the output parameters of

On Wed, Sep 19, 2018 at 5:18 PM Adrian Prantl <aprantl at apple.com> wrote: > > > > > On Sep 19, 2018, at 4:08 AM, Alexander Potapenko <glider at google.com> wrote: > > > > On Tue, Sep 18, 2018 at 1:56 AM Adrian Prantl <aprantl at apple.com> wrote: > >> > >> > >> > >>> On Sep 17, 2018, at 6:59 AM, Alexander

Hi If so, is it able to disable this check. All I need is just to get the BB coverage information Regards Muhui Alexander Potapenko <glider at google.com>于2018年9月5日 周三下午6:57写道： > This is a known problem in SPECCPU2006, see > https://github.com/google/sanitizers/wiki/AddressSanitizerFoundBugs > On Wed, Sep 5, 2018 at 7:36 AM Muhui Jiang via llvm-dev > <llvm-dev at

Hi I am using SanitizerCoverage feature supported by clang to get the basicblock coverage. my tested binaries are spec cpu2006. I compiled the binary with the option COPTIMIZE = -O0 -fsanitize=address -fsanitize-coverage=bb -flto -fno-strict-aliasing -std=gnu89 -gdwarf-3 After the compiling process is end. I run the 400.perlbench. with the command ASAN_OPTIONS=coverage=1 ./perlbench.

Hi all, As per the instructions here <http://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access>, I contacted Chris Lattner to obtain commit access but haven't received a response (either positive or negative). What's the expected turnaround time for this (I contacted him five days ago)? In case he's currently unavailable, is there someone else I could contact? Thanks,

Hello This link didn't work for me. As I am getting error whose meaning is - there are no options as -arch i386 -arch x86_64. How should I remove this error? On Wed, Mar 22, 2017 at 6:11 PM, 陳韋任 <chenwj.cs97g at g2.nctu.edu.tw> wrote: > Hi Aayushi, > > Seems the link [1] answers your question. > > [1] http://stackoverflow.com/questions/28640585/build- >

On Tue, Apr 19, 2016 at 1:18 PM, Filipe Cabecinhas <filcab at gmail.com> wrote: > Thanks for proposing this. It seems like it might be an interesting > tool for us too. But this proposal seems a bit hand-wavy, and I think > it's missing some crucial info before we start heading this way. > > At least for the tools you are currently starting to implement, it > would be

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Hello! I''ve put some questions on this list some weeks ago and I''ve got good answers. Thank you! Now I''ve finished my (beautyful) script and I ran it on my router... About my script: It routes packages based on their destination on the Internet. I have about 1650 preffered destination networks listed in some file. The script read this file and marks every package for