similar to: [LLVMdev] Storing values in global variables

Hello, We're evaluating memory tagging (MTE) on some internal workloads. We noticed that stack variables are tagged by an instrumentation pass and heap objects are handled by the allocator (Scudo). How about global variables? We tried a simple case using -march=armv8a+memtag -fsanitize=memtag, but found no tagging: Are we missing anything or tagging globals is still in progress? int

Thanks for the update, Phillips. Yes, please add me, Stephen and Ana (CCed) to Phabricator reviews. Zhaoshi From: Mitch Phillips <mitchp at google.com> Sent: Tuesday, July 14, 2020 19:10 To: Zhaoshi Zheng <zhaoshiz at quicinc.com> Cc: llvm-dev at lists.llvm.org; Stephen Long <steplong at quicinc.com> Subject: [EXT] Re: [llvm-dev] [MTE] Tagging Globals Hi Zhaoshi, Currently

Hi list, I have several questions about LLVM pass. 1) Is building a custom LLVM pass out-of-source not recommended? The official document only contains instructions about in-source build (http://llvm.org/docs/WritingAnLLVMPass.html <http://llvm.org/docs/WritingAnLLVMPass.html>). 2) opt (ver >= 4) with custom pass libraries does not work as before. When I have a simple custom LLVM pass

2009/8/22 Bill Wendling <isanbard at gmail.com>: > I think you might have to provide an empty list if your function doesn't > take parameters. Maybe using an irbuilder would help? It does take one parameter. Here's the important bits: // My Function extern "C" void print(double X) { printf("%f\n", X); } // Args type std::vector<const Type*>

I think you might have to provide an empty list if your function doesn't take parameters. Maybe using an irbuilder would help? -bw On Aug 22, 2009, at 2:13 PM, Renato Golin <rengolin at systemcall.org> wrote: > 2009/7/4 Albert Graef <Dr.Graef at t-online.de>: >> This is all I ever needed to interface to C functions using LLVM. >> It's >> really

2009/7/4 Albert Graef <Dr.Graef at t-online.de>: > This is all I ever needed to interface to C functions using LLVM. It's > really easy. Of course you still need a prototype of the external > function (function definition without body) in your IR, but that's it. Hi Albert, I'm having a similar problem and I found I can't declare the function and use it, most likely

Hello, I have an optimisation issue in an llvm IR pass - the issue being that unnecessary instructions are generated in the final assembly (with -O3). I want to create the following assembly snippet: mov dl,BYTE PTR [rsi+rdi*1] add dl,0x1 adc dl,0x0 mov BYTE PTR [rsi+rdi*1],dl however what is created is (variant #1): mov dl,BYTE PTR [rsi+rdx*1] add dl,0x1 cmp

> On Jun 24, 2015, at 10:19 AM, Eli Bendersky <eliben at google.com> wrote: > > > > On Wed, Jun 24, 2015 at 7:05 AM, Q Z <zhaoqian301 at gmail.com <mailto:zhaoqian301 at gmail.com>> wrote: > Hello，I want to compile a large project(for example,Apache httpd) to one .bc file. How can I do this? Can you give me some examples? > > > In general, if the

I am trying to get a handle on IR builder, at least some basics. I ran through a tutorial here: Create a working compiler with the LLVM framework, Part 1 <http://www.ibm.com/developerworks/library/os-createcompilerllvm1/>, and it worked well enough. I have some simple code that creates a hello world IR. I am trying to now bring in some concepts from the Kaleidoscope tutorial, namely

Using the LLVM C++ API, if I want to create an array via an Alloca instruction like: Value *a = ir_builder.CreateAlloca( my_type, my_size ); and then I want to initialize each element of the array with values computed elsewhere like: for ( vector<Value*>::const_iterator i = v.begin(); i != v.end(); ++i ) { builder.CreateStore( *i, a ); // How do I increment 'a' to point to

Not at this stage -- no. On Wed, Jul 15, 2020 at 3:23 PM Zhaoshi Zheng <zhaoshiz at quicinc.com> wrote: > Mitch, > > > > I forgot to ask: do you have any timeline on sharing it through > Phabricator? > > > > Thanks, > > Zhaoshi > > > > *From:* llvm-dev <llvm-dev-bounces at lists.llvm.org> *On Behalf Of *Zhaoshi > Zheng via llvm-dev

Hi Craig, On 03.07.19 17:33, Craig Topper wrote: > Don't the CreateICmp calls return a Value* with an i1 type? But then > they are added to an i8 type? Not sure that works.  I had that initially: auto cf = IRB.CreateICmpULT(Incr, ConstantInt::get(Int8Ty, 1)); auto carry = IRB.CreateZExt(cf, Int8Ty); Incr = IRB.CreateAdd(Incr, carry); it makes no difference to the generated assembly

I read the tutorial doc and some info of SSA, finally understand it. Thanks for your help. And the segmentation error of loading arguementation occurs, (gdb error info) Program received signal SIGSEGV, Segmentation fault. 0x0855bb68 in llvm::LoadInst::LoadInst(llvm::Value*, char const*, bool, llvm::Instruction*) () code is like follows: //#include necessary header files int main(){

On Wed, 2015-08-05 at 10:02 -0400, Ramkumar Ramachandra wrote: > > - at 5 = internal global [10 x i8] c"\22\D0\12\F4!\00\15\F9\EC\E1" > - at 6 = internal global [10 x i8] c"\D0\19\FB+\FD\F8#\03\E2\11" > + at 5 = internal global [10 x i8] c"\22Ð\12ô!\00\15ùìá" > + at 6 = internal global [10 x i8] c"Ð\19û+ýø#\03â\11" > > The diff

Hi, I'm having a hard time finding an answer to what I assume is a very basic idea. I'm trying to produce this llvm code using the LLVM api: %myString = alloca [13 x i8], i32 13 store [13 x i8] c"Hello world.\00", [13 x i8]* %myString %tmp1 = getelementptr [13 x i8]* %myString, i32 0, i32 0 %tmp2 = call i32 (i8*, ...)* @printf( i8* %tmp1 ) nounwind A simple Hello

hi On Sun, Apr 22, 2012 at 8:36 PM, Jianfei Hu <hujianfei258 at gmail.com> wrote: > in the  tutorial of official llvm doc, chapter 3, it deals with arguement of > function as follow: > > for (Function::arg_iterator AI = F->arg_begin(); Idx != Args.size(); >        ++AI, ++Idx) { >     AI->setName(Args[Idx]); > >     // NamedValues is map<string, Value*>

in the tutorial of official llvm doc, chapter 3, it deals with arguement of function as follow: for (Function::arg_iterator AI = F->arg_begin(); Idx != Args.size(); ++AI, ++Idx) { AI->setName(Args[Idx]); // NamedValues is map<string, Value*> NamedValues[Args[Idx]] = AI; and when it try to get the value of arguement, it simply does: Value

Emitting calls to these functions (written in an .ll file linked in) works fine, and does the right thing. %Any = type { i8*, i32 } define dllexport void @setGlobal(%Any* %ptr, %Any %value) { store %Any %value, %Any* %ptr ret void } define dllexport %Any @getGlobal(%Any* %ptr) { %val = load %Any, %Any* %ptr ret %Any %val } Trying to replace the setGlobal call with what should be

Since the getelementptrs were implicitly generated by the CreateStore/Load I'm not sure how to get access to them. So I hacked the assignment to be done thrice: once using a manual decomposition into two GEPs and stores, once using the "big" CreateStore, once via the setGlobal function, printing addresses and memory contents at each point to the degree that I have access to them.

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: