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Mhm I see now, thanks for your explanation! Son Tuan Vu On Fri, Mar 16, 2018 at 10:58 PM, Vedant Kumar <vsk at apple.com> wrote: > > On Mar 16, 2018, at 2:30 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > Thank you for your reply. I think I can make this debugify-each mode, but > I guess this...

> On Mar 16, 2018, at 2:30 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > Thank you for your reply. I think I can make this debugify-each mode, but I guess this is reserved for your GSoC project ? No, there's no reserved work. If you'd like to work on this I encourage you to do so. The...

Hi Vedant, Thanks for your reply. More comments inline. Son Tuan Vu On Fri, Apr 20, 2018 at 10:19 PM, Vedant Kumar <vsk at apple.com> wrote: > Hi, > > + Chandler, who has a lot more experience with our pass managers. > > On Apr 20, 2018, at 12:56 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > + Vedant: what do you thin...

...ching everywhere but can't seem to find an API to remove MDNodes. I have seen a *MDNode::deleteAsSubclass() *method, unfortunately it is private.I guess nobody has ever needed to remove MDNodes/Metadata before. Can you give me some advice on how to do this please? Thank you for your help Son Tuan Vu On Fri, Mar 16, 2018 at 11:54 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > Mhm I see now, thanks for your explanation! > > Son Tuan Vu > > On Fri, Mar 16, 2018 at 10:58 PM, Vedant Kumar <vsk at apple.com> wrote: > >> >> On Mar 16, 2018, at 2:3...

...t check-debugify (I mean the .ll file with potentially all the WARNINGs and ERRORs after the first pass) as input for the second debugify. What we need is to take the fresh output of *clang -Xclang -emit-llvm -disable-O0-optnone -S *and iteratively test each optimization. Am I right? Cheers, Son Tuan Vu On Thu, Mar 15, 2018 at 4:05 AM, Vedant Kumar <vsk at apple.com> wrote: > Hi Son Tuan, > > Thanks for taking a look at this :). Responses inline -- > > On Mar 14, 2018, at 8:11 AM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, hi all, > >...

Hello, > On Apr 26, 2018, at 6:44 AM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > I have tried to implement the fix you proposed, but it didn't work as expected. I created a new Module Pass Manager (not Function Pass Manager) and override the add() method like this: > > class DebugifyEachPas...

Hello, Has anyone taken a look at this bug? I really want to fix this, but as Paul pointed out, this requires a lot of care... Thank you for your help Son Tuan Vu On Fri, Apr 27, 2018 at 7:29 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > Thank you all for taking a look at this. I pasted the C source then > deleted it because I was afraid that it was too long to read... > > Here's the code of *foo*. Its real name is *verify...

> On Apr 20, 2018, at 1:46 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > Thanks for your reply. More comments inline. > > Son Tuan Vu > > On Fri, Apr 20, 2018 at 10:19 PM, Vedant Kumar <vsk at apple.com <mailto:vsk at apple.com>> wrote: > Hi, > > + Chandler,...

...a bug report about this (bugs.llvm.org <http://bugs.llvm.org/>)? If you don't have an account on bugzilla, I'd be happy to file one for you. Please provide exact instructions to reproduce the issue including any compilation flags. thanks, vedant > On May 7, 2018, at 9:16 AM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hello, > > Has anyone taken a look at this bug? I really want to fix this, but as Paul pointed out, this requires a lot of care... > > Thank you for your help > > Son Tuan Vu > > On Fri, Apr 27, 2018 at 7:29 PM, Son...

....i64(i8* align 16 %0, i8 %2, i64 10, i1 false) * tail call void @mem_read_test(i8* %0)* ret void } ; Function Attrs: nounwind readonly declare void @mem_read_test(i8*) #2 However, the call to memset() still got optimized away by DSE. What am I missing here? Or this is indeed a bug in DSE? Son Tuan Vu On Wed, Jul 24, 2019 at 6:47 PM Doerfert, Johannes <jdoerfert at anl.gov> wrote: > You are on the right track. Addresses could get exposed in various ways, > a probably non-exclusive list is: > - passed as arguments > - communicated through a global > - via I/O, or mor...

+ Vedant: what do you think about the last point, since Debugify is also related? Son Tuan Vu On Thu, Apr 19, 2018 at 6:14 PM, Philip Pfaffe <philip.pfaffe at gmail.com> wrote: > Hi Son, > > PassManagerBuilder is used to populate legacy PassManagers. That role is > taken over by PassBuilder for new-PM passes. > > Cheers, > Philip > > 2018-04-18 13:40 G...

...dered as an analysis pass? Actually, this will have impact on debugify-each and print-before/after-all: we are not supposed to print/debugify Verifier pass, but since Verifier is declared as a transformation (well, a non-analysis) pass, we actually do print/debugify it. Thanks for your help! Son Tuan Vu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180712/32d589f2/attachment.html>

...only its arguments if IntrArgMemOnly specified, - its arguments and the global variable as well if Intr*Mem (other than IntrNoMem) specified. Please tell me if I'm correct or not! Thanks again, On Wed, Jul 24, 2019, 17:27 Doerfert, Johannes <jdoerfert at anl.gov> wrote: > Hi Son Tuan Vu, > > if not restricted by *writeonly*, *readonly*, or *readnone* (basically), a > call can access any object for which the > callee could potentially know the address. That means, if the address of > an object cannot be known to the callee, > it cannot access that object. An ex...

...debugify-each is quite ready, I am having Debugify and CheckDebugify before and after each ModulePass, then I just need to implement the FunctionPass and LoopPass. On Thu, Apr 26, 2018 at 8:53 PM, Vedant Kumar <vsk at apple.com> wrote: > Hello, > > On Apr 26, 2018, at 6:44 AM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > I have tried to implement the fix you proposed, but it didn't work as > expected. I created a new *Module* Pass Manager (not Function Pass > Manager) and override the *add()* method like this: > > class Debu...

Hello all, Does anyone know how to define a pure intrinsic in LLVM IR? I have tried almost every intrinsic property from llvm/include/llvm/IR/Intrinsics.td but haven't found anything. Or maybe this is not supported in the IR yet? Thank you for your help, Best, Son Tuan Vu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200720/f55f93df/attachment.html>

Hello, Does anyone know if it is possible to RAUW the Metadata? I took a look at the source for it and IIUC, it is not possible. What should I do to implement the RAUW for DINode (more precisely DILocation)? Thank you for your help, Son Tuan Vu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180730/cfa3ae3b/attachment.html>

...build the libc at all, I downloaded a pre-built version of the whole toolchain from https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads, so I guess it is an official version provided by ARM and should work? This version targets ARM Cortex-M and Cortex-R family of processors... Son Tuan Vu On Mon, Mar 12, 2018 at 4:15 PM, Tim Northover <t.p.northover at gmail.com> wrote: > Hi, > > On 12 March 2018 at 15:06, Son Tuan VU via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > But libc code is in ARM mode: > > That's very bad, because Cortex-M...

Hi, + Chandler, who has a lot more experience with our pass managers. > On Apr 20, 2018, at 12:56 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > + Vedant: what do you think about the last point, since Debugify is also related? Could you clarify the question? I'm not sure what it is you'd like me to chime in about. > 2, I've asked this question once but have had no ans...

...gt;: none gets optimized away as expected - ReadNone<0> / WriteOnly<0>: none gets optimized *unexpectedly* Am I missing something here or there are indeed bugs here? Btw, can you tell me how and why 'tail' changes the optimizer behavior? Thanks a lot for your explanation! Son Tuan Vu On Thu, Jul 25, 2019 at 12:57 AM Doerfert, Johannes <jdoerfert at anl.gov> wrote: > Does the behavior change if you remove the tail from the call to your > intrinsic? > > I can later look in more detail. > > Get Outlook for Android <https://aka.ms/ghei36> > &g...

...Adding a debugify-each mode would make the output unreadable! Maybe writing a script that collects all optimization options (like -mem2reg or -constmerge), then pass each one of them to opt with -enable-debugify so that we have 1 output file for each debugified pass? Thank you for your help, Son Tuan Vu -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180314/b4a78210/attachment.html>