similar to: optimisation issue in an llvm IR pass

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

Török Edwin wrote: > [snip] > > Ah, the method got moved to the instruction itself! > > dbgKind = Context->getMDKindID("dbg"); > if (MDNode *Dbg = I->getMetadata(dbgKind)) { > ... > Thanks! This appears to work. I also have code that looks up debug information for GlobalVariables and regular LLVM Value *'s. For the former, I think I can look up

Hi, I'm trying to recover the inheritance relations for a class type (so a list of base classes) from a llvm ir file generated via compiling some cpp file using clang. I have access to the TypeSymbolTable and have found the class type I want to know the base classes for in the table. How do I go about extracting this (debug) information? I'm stuck here: if(StructType*

Török Edwin wrote: > [snip] >>> Something like this (you can of course cache TheMetadata and MDDbgKind) >>> >>> llvm::MetadataContext *TheMetadata = M->getContext().getMetadata(); >>> MDDbgKind = TheMetadata->getMDKind("dbg"); >>> if (MDDbgKind) { >>> if (MDNode *Dbg = TheMetadata->getMD(MDDbgKind, I)) { >>>

Hello everyone, I have an integer and I want to convert it to StringRef in order to set metadata. setMetadata->(StringRef, MDNode*); It is there a native LLVM way to do it? 1. In the llvm::APSInt Class is toString() method, which seems it is not for this purpose 2. itoa and string are not part of LLVM 3. stringstream is not part of LLVM 4. to_string is not part of LLVM 5. any casting method?

Hi, I have bitcode files built by LLVM v3.3 and need to process them using v3.4 tools. While I don't expect a lot of backward compatibility in LLVM, luckily it seems everything's working fine, except for reading source line information attached to instructions. I use this piece of code [0] to get source line information. For v3.4, instruction.getMetadata returns NULL. I used llvm-dis to

On 03/16/2010 05:30 PM, John Criswell wrote: > Török Edwin wrote: >> [snip] >>>> Something like this (you can of course cache TheMetadata and MDDbgKind) >>>> >>>> llvm::MetadataContext *TheMetadata = M->getContext().getMetadata(); >>>> MDDbgKind = TheMetadata->getMDKind("dbg"); >>>> if (MDDbgKind) {

On 03/16/2010 06:52 PM, John Criswell wrote: > Török Edwin wrote: >> [snip] >> >> Ah, the method got moved to the instruction itself! >> >> dbgKind = Context->getMDKindID("dbg"); >> if (MDNode *Dbg = I->getMetadata(dbgKind)) { >> ... >> > > Thanks! This appears to work. Ok. > > I also have code that looks up

I think the better solution should be: LLVMContext& C = is->getContext(); Value *values[] = { ConstantInt::getSigned(Type::getInt64Ty(C), *scsr*), MDString::get(C, *"path"*) }; lnstr.setMetadata(*"your_analysis_name"*, MDNode::get(C, values)); So that you can take advantage of the type system of LLVM bitcode, and don't have to cast the integers from/to strings

Thanks Eric, but could you give me a little bit more hints or pointers please? I looked into DebugInfo.h, but I'm still not sure how to start. It sounds like I'd have to somehow manually extract metadata nodes from an instruction. Thanks, JS On Wed, Jan 22, 2014 at 10:14 PM, Eric Christopher <echristo at gmail.com>wrote: > This is likely going to be difficult if possible. I

Hi, John Criswell-4 wrote: > > > You may want to use LLVM Metadata features. Search for MDNode in the > doxygen docs for some information on how to create metadata. > > I use metadata information in this way: unsigned mk = Context.getMDKindID(mdtype); Value *V = MDString::get(Context,StringRef(str)); MDNode* n = MDNode::get(Context, &V, 1);

Hello > I found utils/GenLibDeps.pl cann't run on Windows, so I fix it, made a patch > on svn-110435. I submit this patch, hope it can be accepted. It definitely works for me on windows (not only for me, but for many others too). Which problems you're seeing? -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University

On 10/25/10 4:13 AM, Xinfinity wrote: > Hello, > > Does there exist something like a "dummy" instruction that is not removed by > the optimizers, even if it seems to be dead code? > I want to use such instructions to carry metadata information, but they > should have a minimal impact on the code generation and optimization. I used > an add instruction: You may want

Hi I found utils/GenLibDeps.pl cann't run on Windows, so I fix it, made a patch on svn-110435. I submit this patch, hope it can be accepted. Thanks for your time. Regards. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100806/d2e10f3e/attachment.html> -------------- next part -------------- A

The problem is that I want to pass only srsr which is an int. "marked" was just an example :) Thanks you! On Thu, May 2, 2013 at 5:06 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote: > I'm not familiar with this, but maybe you can try: > > StringRef tst = ("marked" + Twine(srsr)).str(); > > It seems that you can't use integer as meta data

Yes, it sounds good. I can try tomorrow. Thank you for your advice ! On Thu, May 2, 2013 at 5:43 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote: > I think the better solution should be: > > > LLVMContext& C = is->getContext(); > Value *values[] = { > ConstantInt::getSigned(Type::getInt64Ty(C), *scsr*), > MDString::get(C, *"path"*) > };

Hi, I think you may try to use llvm::Twine(int). For example, to convert 30 to string, you can use: Twine(30).str() To convert the string back to integer, you can try the StringRef::getAsInteger(unsigned, APInt &). For example: APInt i; str.getAsInteger(/*radix=*/ 10, /*output=*/ i); Sincerely, Logan On Thu, May 2, 2013 at 9:53 PM, Alexandru Ionut Diaconescu <

How can I platform-conditionally compile/check sections of code with lit? Can I rely on preprocessor defines like _WIN32? Specifically, I'm adding new tests to existing lit tests, but the new tests should only be compiled and run on Windows. Sincerely, Alexander Riccio -- "Change the world or go home." about.me/ariccio <http://about.me/ariccio> If left to my own devices, I

On Oct 26, 2010, at 9:23 AM, Xinfinity wrote: > > Hello, > > > Devang Patel wrote: >> >> >> On Oct 25, 2010, at 12:09 PM, Xinfinity wrote: >> >>> #pragma my_pragma{ >>> code >>> } >> >>> I use a map >>> (source_location, pragma) and I insert the dummy instruction when this >>> location is

Hello, Does there exist something like a "dummy" instruction that is not removed by the optimizers, even if it seems to be dead code? I want to use such instructions to carry metadata information, but they should have a minimal impact on the code generation and optimization. I used an add instruction: %0 = add i8 1, 2, !pragma_instrument_mem_add !0 ; <i8> [#uses=0] which