similar to: [LLVMdev] Would like to force one minor, mechanical change on out-of-tree users of the old pass manager

On Wed, Jan 28, 2015 at 12:56 PM, Chandler Carruth <chandlerc at gmail.com> wrote: > Greetings folks. > > I had really wanted out-of-tree folks to be able to make only a single > change to their code due to the new pass manager; essentially, by the time > they had to touch the code at all I wanted them to be able to port > completely to the new pass manager. > >

Hello, I've recently changed AddressSanitizer (asan) compiler pass from ModulePass to FunctionPass and it could a bit of mayhem. The problem is that asan FunctionPass instruments a function foo, then foo gets inlined into bar, then bar gets instrumented and thus the code of foo gets instrumented twice (which causes run-time crash). This happens only at -O0; at -O1 we get the correct order of

On Tue, Nov 5, 2013 at 10:12 AM, <dag at cray.com> wrote: > Chandler Carruth <chandlerc at google.com> writes: > > So far, I'm not hearing any significant objections. > > > > I'm going to put the plan of record about this into the release notes, > > and I'll write up a blog post about it and do some other things which > > will likely make

Chandler Carruth <chandlerc at google.com> writes: > The overwhelming majority of contributors and users of trunk seem to > be fine with this, so while I'm interested in anything we can do to > make it easier for you, unless we see significantly more concerns > about this plan, I think we should move forward. > > Fundamentally, we aren't going to be able to make

Hello LLVMdev, I’m using LLVM to do static analysis exclusively (without any code generation). To implement this analysis, I’m using multiple address spaces to disambiguate the purpose of the pointed memory. Since address spaces never alias in my model, I set on to implement an alias analysis pass that would exactly provide this information, as I’m seeing a couple of otherwise dead store that

On Tue, Dec 27, 2016 at 3:38 PM, Asiri Rathnayake <asiri.rathnayake at gmail.com> wrote: > > > On Tue, Dec 27, 2016 at 1:29 PM, Carsten Mattner via llvm-dev > <llvm-dev at lists.llvm.org> wrote: >> >> When I tried to build with -DLLVM_ENABLE_LIBCXX, I found out that >> it doesn't try to use the in-tree libcxx but looks for one built >> and

On Oct 17, 2012, at 7:34 AM, Kostya Serebryany <kcc at google.com> wrote: > Hello, > > I've recently changed AddressSanitizer (asan) compiler pass from ModulePass to FunctionPass and it could a bit of mayhem. > > The problem is that asan FunctionPass instruments a function foo, then foo gets inlined into bar, then bar gets instrumented > and thus the code of foo

Hi, I have just followed the http://wiki.centos.org/HowTos/Nagios intruction and found some minor errors that I would like to correct. I would also like to add a section with NagViz to the Nagios HowTo. My user is matsk. Kind regards Mats -------------- next part -------------- An HTML attachment was scrubbed... URL:

O0 didn't start applying optnone until r304127 in May 2017 which is after the 4.0 family was branched. So only 5.0, 6.0, and trunk have that behavior. Commit message copied below Author: Mehdi Amini <joker.eph at gmail.com> Date: Mon May 29 05:38:20 2017 +0000 IRGen: Add optnone attribute on function during O0 Amongst other, this will help LTO to correctly handle/honor

On Thu, Jun 4, 2015 at 3:58 PM, Duncan P. N. Exon Smith < dexonsmith at apple.com> wrote: > > > Personally, I think the right approach is to add a bool to > createGlobalDCEPass defaulting to true named something like > IsAfterInlining. In most standard pass pipelines, GlobalDCE runs after > inlining for obvious reasons, so the default makes sense. The special case > is

On Tue, Dec 27, 2016 at 2:45 PM, Carsten Mattner <carstenmattner at gmail.com> wrote: > On Tue, Dec 27, 2016 at 3:38 PM, Asiri Rathnayake > <asiri.rathnayake at gmail.com> wrote: > > > > > > On Tue, Dec 27, 2016 at 1:29 PM, Carsten Mattner via llvm-dev > > <llvm-dev at lists.llvm.org> wrote: > >> > >> When I tried to build with

Craig, thanks a lot! I'm actually confused by clang optimization flags. If I run clang -help, it will show many optimizations (denoted as set A) and non-optimization options (denoted as set B). If I run llvm-as < /dev/null | opt -O0/1/2/3 -disable-output -debug-pass=Arguments, it also shows many optimization flags (denote as set C). There are many options in set C while not in set A,

Hi, If we add multiple loop passes to the pass manager in PassManagerBuilder.cpp consecutively without any func/module pass in between, I used to think they would belong to the same loop pass manager. But it does not seem to be the case. For example for this code snippet PM.add(createIndVarSimplifyPass()); // Canonicalize indvars MPM.add(createLoopIdiomPass()); //

On Thu, Jun 4, 2015 at 5:33 PM, Reid Kleckner <rnk at google.com> wrote: > On Thu, Jun 4, 2015 at 5:17 PM, Teresa Johnson <tejohnson at google.com> wrote: >> >> Agreed. Although I assume you mean invoke the new pass under a >> ThinLTO-only option so that avail extern are not dropped in the >> compile pass before the LTO link? > > > No, this pass

Hi, I have a module pass and I hope to use it to optimize a real-world program. I need LTO，and I have got LTO plugin. But How can I add my passes to LTO Pass. I can't find solution. What should I do? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200422/76d2b046/attachment.html>

Hi Mehdi, Thank you for the response. I'm actually on an LTO setup and was referring to PassManagerBuilder::addLTOOptimizationPasses. Here, GlobalsAA is scheduled to run well ahead of SLPVectorizer. However since GlobalsAA is a module pass, it runs once and a bunch of passes, including SLPVectorizer is run for each function. When one of them invalidates the analysis, rest of the functions do

Hello, I have created a ModulePass, that now needs LoopInfo information. The ModulePass registration is taken from [1]. I use clang to directly invoke it (This is also a hard requirement, because I need the fancy output of clang warnings/remarks). The problem is, that the dependency to the LoopInfoWrapperPass does not seem to work. The error is: --- snip --- clang-4.0:

Chandler Carruth <chandlerc at google.com> writes: > So far, I'm not hearing any significant objections. > > I'm going to put the plan of record about this into the release notes, > and I'll write up a blog post about it and do some other things which > will likely make enough noise to ensure we aren't missing people's > objections over the next few

I don't think "clang -help" prints options about optimizations. Clang itself doesn't have direct support for fine grained optimization control. Just the flag for levels -O0/-O1/-O2/-O3. This is intended to be simple and sufficient interface for most users who just want to compile their code. So I don't think there's a way to pass just -dse to clang. opt on the other hand

On Tue, Dec 27, 2016 at 1:29 PM, Carsten Mattner via llvm-dev < llvm-dev at lists.llvm.org> wrote: > When I tried to build with -DLLVM_ENABLE_LIBCXX, I found out that > it doesn't try to use the in-tree libcxx but looks for one built and > installed > in the system. > IIRC, -DLLVM_ENABLE_LIBCXX reduces to passing --stdlib=libc++ (see [1]) to the compiler. What you can