similar to: How to include a opt pass in clang driver

Hi Eli, I have tried that: static void registerMyPass(const PassManagerBuilder &, llvm::legacy::PassManagerBase &PM) { PM.add(new MyPass()); } static RegisterStandardPasses RegisterMyPass(PassManagerBuilder::EP_OptimizerLast, registerMyPass); It still couldn't find my pass. Regards, Soham Sinha PhD Student,

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:

Hi, I am trying to create a pass that should get statically linked into opt (since I'm on both mac and native win32 and win32 does not support LOADED_MODULEs, at least I get errors while trying to create one). So I have it working with CMake on windows but when I try to run the same code base on mac I get unresolved externals. Here is what I have done so far in the build system: Within

Hi, I have a module pass and I hope to use it to optimize a real-world program. I need LTO，and I have got LTO plugin. But How can I add my passes to LTO Pass. I can't find solution. What should I do? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200422/76d2b046/attachment.html>

i put following line in CMakeLists.txt; add_subdirectory(mypass) then used make -j9 then i used following and run on canonicalize IR $ opt -load lib/LLVMmypass.so -mypass vec-sum.preopt.ll On Mon, Jan 29, 2018 at 9:39 PM, Michael Kruse <llvmdev at meinersbur.de> wrote: > 2018-01-29 10:18 GMT-06:00 hameeza ahmed <hahmed2305 at gmail.com>: > > I tried writing

Hi, I'm having problems while using a custom pass with opt. The pass compiles and links just fine but, when I try to use it with opt: opt -load LLVMmyPass.so -my-flag -f aes.bc -o aes_bb.bc opt refuses to load it with the following error: Error opening 'LLVMmyPass.so': LLVMmyPass.so: undefined symbol: _ZN4llvm9DebugFlagE -load request ignored. and then complains that the flag

clang doesn't seem to respect __attribute__((used)) in C functions. Even if I declare a function like the following: __attribute__((used)) void function(), then also it doesn't declare the function in its IR file if I don't use the function. Is there any other way to force the declaration of "unused" function declarations with clang. I have hacked in clang 6.0.0 in

Hello fellow R sufferers, Is there a way to perform an appending operation in place? Currently, the way my pseudo-code goes is like this for (i in 1:1000) { if (some condition) { newRow <- myFunction(myArguments) X <- rbind(X, newRow) # <- this is the bottleneck!! } } As you can see, it works but as the matrix X gets the size of a few million rows, the

It does, when the function has a body. When it doesn't, it ignores <https://godbolt.org/g/2BCvht>. The body might be provided later on in the toolchain via linking a library. Regards, Soham Sinha PhD Student, Department of Computer Science Boston University On Tue, Jun 26, 2018 at 10:25 AM Hans Wennborg <hans at chromium.org> wrote: > It works for me: > >

Hi, I'm trying to write custom pass. However opt started crashed in opt.cpp. After debugging it looks like PassInf->NormalCtor points to unmapped memory (rest of struct contains correct data about my pass) - it pointed high in user memory (0x756e672e006e6f69). It happens only when I tried to install debug version of llvm system-wide (I've check that it wasn't caused by stale .a

For the same reason GCC allowed the attribute. Even if I want to use/inline a function later on in the pipeline. Regards, Soham Sinha PhD Student, Department of Computer Science Boston University On Tue, Jun 26, 2018 at 8:30 AM mayuyu.io <admin at mayuyu.io> wrote: > Out of curiosity, how does an unused declaration affect the emitted object > file > > Zhang > > > 在

Hello everyone, I'm new to LLVM (which is a really great project by the way) and I hope this is the right place for my question. In the LLVM Language Reference Manual I found the "jumptable" function attribute, which seems to be exactly what I need for my project (where I want to add one level of indirection to every function call), but I have trouble figuring out, how to use

Hello, How can I inline a function mentioned in other file? I have an inline function *foo* in C source file (a.c) which is not referenced in this file. I compile this file to a.ll (I notice that the compiled a.ll doesn't have *foo*'s definition, probably because it was inlined but not called anywhere) I have another C source file b.c with function *bar*; I compile this to b.ll I link

Hi Soham, “extern inline” keyword will help in this case, with this keyword compiler is forced to keeps the definition of the function and make it available for the external usage. Also it retains the “inlinehint” attribute on the function, with that lto inliner may make it inline. Best, Ashutosh From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Mehdi AMINI via llvm-dev

Hello, LLVM MC blog post <http://blog.llvm.org/2010/04/intro-to-llvm-mc-project.html> explains fairly well how the backend MC project is working. However, it's not clear to me how LLVM converts an assembly file (.s) to an object file. The driver --verbose option is not giving me much information as well. I want to know the flow. Like, What CodeGen phases does this file pass through? Is

Hello, I want to add assembly instructions at certain points in a function. This is X86 specific. So I am working in the lib/Target/X86 folder. I create a `MachineFunctionPass` in that folder. I register it in the X86TargetMachine.cpp in addPreEmitPass(). I use BuildMI to insert my own assembly instructions in the MachineFunctionPass. This works and my assembly instructions are inserted at

Hi Soham, Are you intending to use the inline keyword in order to control the inlining optimization? The inline keyword is not doing this, it is changing the linkage type of the symbol and instruct the compiler to discard it if there is no call left, and also will instruct the linker to deduplicate. For instance if multiple file include a header that defines an inline function, this function

One place to look might be in the MachineOutliner target hooks in X86InstrInfo and AArch64InstrInfo. The MachineOutliner runs extremely late in the pass pipeline so it might be a good place to look for some inspiration. Of course, because this is *extremely late* it might not do *exactly* what you need. (e.g, this is post-register allocation, post frame-lowering, etc.) - Jessica > On May 4,

Passing an assembly file to clang does not go through any CodeGen phases. It operates entirely in the MC layer. No MachineFunctions will be created. It just runs it through the MCAsmParser. Most of the setup for this is in clang's tools/driver/cc1as_main.cpp in the function ExecuteAssembler ~Craig On Thu, May 10, 2018 at 1:32 PM Soham Sinha via llvm-dev < llvm-dev at lists.llvm.org>

Hello Dean, I looked at the XRay Instrumentation. That's a nice engineering effort. I am sure you had your motivation to do this in CodeGen just like I wanted to do. I don't understand all of your code but I get the idea that you are adjusting the alignment with explicit bytes and no-op instructions. My problem is also very much related to yours where my stack pointer ($rsp) alignment