similar to: [LLVMdev] RFC: MCJIT enhancements - JIT overview

The other MCJIT improvements aren’t dependent on the triple changes at all. The reason that this came up in the context of MCJIT is that the quickest way to get MCJIT support on Windows is to enable the generation of ELF object images on Windows. We previously proposed a minimal approach of just adding “ELF” to the recognized triple environment strings. This is the way that MachO generation is

Chris, are you OK with the below changes to the Triple? -Jim On Sep 4, 2012, at 5:21 PM, "Kaylor, Andrew" <andrew.kaylor at intel.com> wrote: > ping > > From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Kaylor, Andrew > Sent: Tuesday, August 28, 2012 11:10 AM > To: Jim Grosbach; Pawel Bylica; Chris Lattner > Cc: llvmdev

On Sep 4, 2012, at 5:23 PM, Jim Grosbach <grosbach at apple.com> wrote: > Chris, are you OK with the below changes to the Triple? If at all possible, I'd like to keep the triple changes separate (separate patch series and separate discussion) from the other MCJIT changes. How dependent are the MCJIT improvements on the Triple changes? As you've noticed, Triple is not a

Has anything more happened with this? -Andy From: Jim Grosbach [mailto:grosbach at apple.com] Sent: Friday, August 17, 2012 7:51 AM To: Paweł Bylica; Chris Lattner Cc: llvmdev at cs.uiuc.edu (LLVMdev at cs.uiuc.edu); Kaylor, Andrew Subject: Re: [LLVMdev] RFC: MCJIT enhancements On Aug 17, 2012, at 2:50 AM, Paweł Bylica <pawel.bylica at ibs.org.pl<mailto:pawel.bylica at ibs.org.pl>>

ping From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Kaylor, Andrew Sent: Tuesday, August 28, 2012 11:10 AM To: Jim Grosbach; Pawel Bylica; Chris Lattner Cc: llvmdev at cs.uiuc.edu (LLVMdev at cs.uiuc.edu) Subject: Re: [LLVMdev] RFC: MCJIT enhancements Has anything more happened with this? -Andy From: Jim Grosbach [mailto:grosbach at apple.com] Sent:

Hi Paweł, Thanks for continuing this discussion. I like the simplicity of your suggestion. My only concern involves the ambiguity of what is meant by “environment”. Presently there are functions in the llvm::Triple class to access the environment as an enumeration of a fixed set of values. It seems that some non-enumerated values are already in use, but introducing possible combinations of

On Aug 17, 2012, at 2:50 AM, Paweł Bylica <pawel.bylica at ibs.org.pl> wrote: > On Fri, Aug 17, 2012 at 12:16 AM, Kaylor, Andrew <andrew.kaylor at intel.com> wrote: > Hi Paweł, > > > > Thanks for continuing this discussion. > > > > I like the simplicity of your suggestion. My only concern involves the ambiguity of what is meant by “environment”.

On Wed, Jul 25, 2012 at 12:24 AM, Kaylor, Andrew <andrew.kaylor at intel.com>wrote: > > -------------------------------**** > > ELF Support on Windows**** > > -------------------------------**** > > **** > > There are various reasons that it would be nice to be able to support > generation of ELF objects on Windows through the MCJIT interface, one of >

On Fri, Aug 17, 2012 at 12:16 AM, Kaylor, Andrew <andrew.kaylor at intel.com>wrote: > Hi Paweł,**** > > ** ** > > Thanks for continuing this discussion.**** > > ** ** > > I like the simplicity of your suggestion. My only concern involves the > ambiguity of what is meant by “environment”. Presently there are functions > in the llvm::Triple class to access

Unless I'm missing something, indeed addGlobalMapping should not work with MCJIT. MCJIT does not consult EEState.getGlobalAddressMap when resolving symbols. Instead it uses RTDyldMemoryManager::getSymbolAddress which checks with DynamicLibrary::SearchForAddressOfSymbol, so Andy's suggestion of DynamicLibrary::addSymbol is better as it should work with both JIT and MCJIT. Another options

Submitted to bugzilla as PR 15729 From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Kaylor, Andrew Sent: Thursday, April 11, 2013 1:13 PM To: Weiss, Eran Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] Migration from JIT to MCJIT Thanks, Eran. I’m not sure how soon I’ll have a solution for you, but it’s on my to-do list now. I’ll also create a bugzilla

Hi Pawel, Some of the issues I have come across (from memory!) are * MCJIT doesn't work on Windows, because it doesn't support COFF. If you want to use it on Windows you have to either target Mach-O (not clear whether that will work in general) or ELF (need to get a patch from Intel to be able to use this). * Make sure you include MCJIT.h and link in MCJIT.lib, otherwise (even if

Thanks, Eran. I’m not sure how soon I’ll have a solution for you, but it’s on my to-do list now. I’ll also create a bugzilla record for this problem. -Andy From: Weiss, Eran [mailto:Eran.Weiss at emc.com] Sent: Thursday, April 11, 2013 12:40 AM To: Kaylor, Andrew Cc: llvmdev at cs.uiuc.edu; Jim Grosbach; Jiong Wang Subject: Re: [LLVMdev] Migration from JIT to MCJIT Andrew, I've attached

Eran, Is there any chance you could boil this down to a small reproducer? I’ve got a mid-to-long-term goal of getting rid of the ugliness in LLDB that Jim mentioned, and fixing your problem would be a good first step. Thanks, Andy From: Jim Grosbach [mailto:grosbach at apple.com] Sent: Wednesday, April 10, 2013 4:19 PM To: Kaylor, Andrew; Jiong Wang Cc: Weiss, Eran; llvmdev at cs.uiuc.edu

Andrew, I've attached a small reproduction of the issue. Reproduce by: $ /usr/bin/g++ `llvm-config --cxxflags` -g -m32 -c mcjit_external_symbol.cpp $ /usr/bin/g++ `llvm-config --ldflags` -g -m32 -o mcjit_external_symbol mcjit_external_symbol.o `llvm-config --libs all` $ ./mcjit_external_symbol verifying... LLVM ERROR: Program used external function '_external' which could not be

There's probably a lot that we could do, but I can't think of anything easy. Basically every time we need to look up a symbol by name we're going to each module and saying "Do you have this symbol?" It would likely be much better if we grabbed the function names from the module and did the search ourselves so that we could keep some information about the things that

Yes, we've been planning to separate the execution engines for a while now, and we've made some small steps (such as breaking out the RTDyldMemoryManager interface) in preparation for doing so. There are some serious entanglements, not least of which there are MCJIT clients (LLDB, for instance) which are using memory managers derived from the JITMemoryManager. Eventually (and soon)

Hi Jim, Clearly searching for name should not be linear in modules but with a map of some kind. After compilation to IR each module has a StringMap symbol table. After compiling to MC and loading the object file, the dynamic linker has a StringMap symbol table for all loaded modules. In the usual use case you'll load module(s) into MCJIT and then compile / link them and all is well, no

Hi Paul, I think you may have gone beyond what I understand in how the legacy JIT code works. It looks like the call to addGlobalMapping should short-circuit the named function look up that I described, but I can't account for why it behaves differently on Mac vs. Linux. I still don't understand how the external pointers persist between writing and reading, but it sounds like you have

Hi Everyone, If you're JITing with LLVM and haven't made the switch to MCJIT already, now is the time. As per discussions on the mailing list and at the last dev meeting, LLVM 3.5 will be the last release to support the old JIT infrastructure. Now that LLVM 3.5 has branched, we plan to start removing the old JIT from the mainline. If you're looking for help in making the switch, Andy