similar to: How to make when developing machine function pass ?

Hi Craig, I am Charles Li from Sony Playstation. We are doing x86 code gen testing and, by chance, we noticed that compiling the 64-bit assembly instruction<https://msdn.microsoft.com/en-us/library/windows/hardware/ff561499(v=vs.85).aspx> "jrcxz" in 32-bit mode "-m32" previously resulted in an error, now gets silently converted into the 32-bit equivalent instruction

On Fri, Feb 9, 2018 at 12:26 AM David Woodhouse <dwmw2 at infradead.org> wrote: > > > On Fri, 2018-02-09 at 02:21 +0000, David Woodhouse wrote: > > On Fri, 2018-02-09 at 01:18 +0000, David Woodhouse wrote: > > > > > > > > > For now I'm just going to attempt to work around it like this in the > > > kernel, so I can concentrate on the

for example I want to insert a new machine bb “before” a specific machine bb. or split a mbb and keep the later one as the original one. (to keep the label/Blackadder's correct t) (or keep other property of mbb) so I need to transfer the original mbb's predecessor to the new mbb. Nicolai Hähnle <nhaehnle at gmail.com> 於 2020年3月13日 週五 23:57 寫道： > On Fri, Mar 13, 2020 at

So if I want to know whether a CallInst is a C++ virtual call or not. I have to get the information at frontend/Clang. and then pass the information to middle-end/LLVM IR by myself. Is it right? Thank you David Blaikie <dblaikie at gmail.com> 於 2020年6月19日 週五 上午1:26寫道： > On Thu, Jun 18, 2020 at 9:53 AM PenYiWang via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > >

Hi I want to replace all the return instructions in the program with pop <reg>; jmp <reg>. Should I use IRBuilder in LLVM IR level? I found that there is a IRBuilder::CreateIndirectBr Or Should I modify the code in lib/Target/X86/X86ISelLowering.cpp in backend ? I found that there is a X86TargetLowering::LowerCall Which is better? Thanks -------------- next part --------------

Hi We knew that "clang -mllvm -debug-pass=Structure ..." can print all pass' name. But, when we use LTO , -flto flag and gold plugin. I found that the option " -debug-pass=Structure" would not pass to ld. so it would not print all the LTO pass's name. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi I want to ask a question. (Maybe it is a trivial question.) I found that there is transferSuccessors() in MachineBasicBlcok So that when manipulating MachineBasicBlock, we can use transferSuccessors to update the CFG easily. Why there is not transferPredecessors in MachineBasicBlcok ? Thank you -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi I know that a virtual call looks like this : %4 = load %class.base*, %class.base** %1, align 8 %5 = bitcast %class.base* %4 to void (%class.base*)*** %6 = load void (%class.base*)**, void (%class.base*)*** %5, align 8 %7 = getelementptr inbounds void (%class.base*)*, void (%class.base*)** %6, i64 0 %8 = load void (%class.base*)*, void (%class.base*)** %7, align 8 call void

Hi I want to write a FunctionPass to insert some code before return. Funcion: .. .. .. mov eax,[esp] cmp eax,0x12345678 je 0x12345678 ret (maybe stack will not balance) I wonder that can I get the return address at llvm ir level? I use IRBuilder to CreateICmpEQ and CreateCondBr. but I don't how to get the value of return addrss. I have found there is a Intrinsic::returnaddress. Is

Hi I am developing some machine function pass. I want to split MachineBasicBlcok when I find some specific machine instruction. But I don't insert or delete any machine instruction. I just "simply" , "purely" split the MachineBasicBlcok. (So, I stole the idea from ARM64BranchRelaxation::splitBlockBeforeInstr.) This is my code : // I would pass call instruction to

Hi I want to insert some functions into the llvm bitcode ir files. So I use IRBuilder and CreateCall(). But it how error : inlinable function call in a function with debug info must have a !dbg location. I don't know what DebugLoc should I give the new CallInst to setDebugLoc. I Create this CallInst , so this CallInst doesn't hava so-called "DebugLoc" mapping to the source

On Fri, 2018-02-09 at 08:45 +0000, Chandler Carruth wrote: > > > > You're pushing the target (-0x20(%ebp)) onto the stack and then > > *calling* __x86_indirect_thunk. So it looks like you're expecting > > __x86_indirect_thunk to do something like > > > >   call *4(%esp) > >   ret > > > > ... except that final 'ret' still

Hi I use BlockAddress to get the address of BasicBlock , and I use GlobalVariable 's getInitializer() to pass the address of BasicBlock to the global variable of my own program and then I print it out. But , I found that BlockAddress is not always correct. For example, some function's rsp (stack pointer) or other register is maintained by caller, so it would be like:

Mike Silbersack wrote: > On Tue, 16 Sep 2003, Scott Long wrote: > > >>Patches have been floated on the mailing list that revert PAE in its >>various stages. Maybe those need to be brought back up. Silby? Tor? >> >>Scott > > > I believe that Tor's commit on August 30th resolved the PAE-related > problems, so there is no need for a reversion.

Is it possible to install and run Netscape whitout having access to a native windows. -- Best regard, Svend Bjerrum Jensen http://www.sbj.esenet.dk

Hi! Does Microsoft Encarta (I have the '99 Version) run with wine? What about Multimedia CDROMs in general? Ulli

Hi, I'm looking over the Wine documentation, and it says that the particular version that looks like it will work with my version of RedHat 7.1 will only work if the glibcc is 2.2 or above. How do I tell? I"m a newbie and not sure exactly what the glibcc is. TIA

On Fri, 2018-02-09 at 02:21 +0000, David Woodhouse wrote: > On Fri, 2018-02-09 at 01:18 +0000, David Woodhouse wrote: > > > > > > For now I'm just going to attempt to work around it like this in the > > kernel, so I can concentrate on the retpoline bits: > >  http://david.woodhou.se/clang-percpu-hack.patch > > 32-bit doesn't boot. Built without

On Fri, 2018-02-09 at 01:18 +0000, David Woodhouse wrote: > > For now I'm just going to attempt to work around it like this in the > kernel, so I can concentrate on the retpoline bits: >  http://david.woodhou.se/clang-percpu-hack.patch 32-bit doesn't boot. Built without CONFIG_RETPOLINE and with Clang 5.0 (and the above patch) it does. I'm rebuilding a Release build of

Hi all, I''m running some tests with netem and I noticed some strange behaviour that looks like a bug: I''m pinging another machine and adding delay with netem. When I tell netem to give me a 10ms delay, it works fine. The problem is that when I ask for a 11ms delay, it gives me 20ms! It happens for any value between 11ms an 20ms, and it repeats for values over 20ms, now