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Hi, I notice that there are several different methods called inside getAnalysisUsage(). The parameters of addRequiredID and addPreservedID are passID. What is the difference between Required and Preserved? There are also function named addRequired<PassName>() called. What is the difference between addRequired<PassName>() and addRequiredID(PassID)? Thanks a lot! Best, Linhai

I have seen INITIALIZE_PASS(LiveVariables, "livevars", "Live Variable Analysis", false, false); in the llvm/lib/codegen/LiveVariables.cpp, where LiveVariables is a subclass of MachineFunctionPass, and #define INITIALIZE_PASS(passName, arg, name, cfg, analysis) \ static RegisterPass<passName> passName ## _info(arg, name, cfg, analysis) in PassSupport.h Is this code used to register and initialize a pass? This kind of registration is just the way illustrated in the hello example at http://llvm.org/docs/WritingAnLLVMPass...

...p;) > method. Described as follows in manual: > > > http://www.llvm.org/docs/doxygen/html/classllvm_1_1Pass.html#a048082a5be9ae0d8901ea64de59e5c8f > > In your own pass in method getAnalysisUsage(Analysis &AU), you can add > required > pass by: > > AU.addRequired<PassName>(); > > And get the analysis from the pass: > > PassName &P = getAnalysis<PassName>(); > > See: > > > http://www.llvm.org/docs/doxygen/html/classllvm_1_1Pass.html#ab78af013d3a11515403da8517f8f3d4a > > Remember to include the necessary header files. Thi...

Dear LLVM developers, Just as LLVM IR can be read/write via persistent bitcode (*.bc *.ll) files, is there any similar implementation in LLVM to read/write Machine IR (MIR) via a persistent file? If not and I would like to add it (e.g. for ARM or RISC-V), could you direct me materials and/or LLVM source code modules where I should start with? Best Regards, Lele Ma -------------- next part

...e each pass is defined as a llvm::PassInfoMixIn<DerivedT> instead of inheriting from llvm::Pass, it doesn't seem possible to obtain the underlying llvm::Pass * from e.g. llvm::ModuleAnalysisManager. Would it make sense to change the definition/implementation to Module::CreateRNG(StringRef PassName)? Please CC me on responses. Thanks, Dominic

I have used the following command for my pass (without -mem2reg): clang -Xclang -load -Xclang MYPASS.so -c ../../tests/test1.c For mem2reg, I tried the following: clang -mllvm -mem2reg -Xclang -load -Xclang MYPASS.so -c ../../tests/test1.c On Mon, Mar 21, 2016 at 9:26 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > >> On Mar 21, 2016, at 6:23 PM, Syed Rafiul Hussain

...ass(); PM.add(CGWP); CallGraph *CG = &CGWP->getCallGraph(); PM.add(new MyPass(CG)); I get the following error: /home/riyad/installs/llvm-3.7.0/include/llvm/PassSupport.h:95:38: error: no matching constructor for initialization of 'MyPass' Pass *callDefaultCtor() { return new PassName(); } My guess is pass manager needs pass with default constructor. Is there any easy way to get instance of call graph in my pass? Thanks in Advance, Riyad -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20...

Hi all, I would like to add an option for LLVM 'opt' to disable a specific optimization pass from command line. The idea is to have something like: opt -O2 -disable-pass=[passname,...] Do you think it could be useful ? How should I proceed to develop it and commit changes to LLVM trunk ? Thanks for your advices and recommandations. Best Regards Seb -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/a...

...tered name, and run the "new" pass, but the result always gives out Segmentation Fault... I am probably missing sth? Implemented another new class, class BasicCallGraph2 : public ModulePass, public CallGraph { ..... ... } The inside code is exact same as BasicCallGraph, except registered passname to be testcgn and the information of the pass. then after enabling and run the new pass, on a test.bc file, there is always a segmentation fault. 0 libLLVM-2.7.so.1 0x00007f5cd87b1d2f 1 libLLVM-2.7.so.1 0x00007f5cd87b238d 2 libpthread.so.0 0x00007f5cd7ba38f0 3 MyPass.so 0x00007f5cd6a5...

...am that schedules the passes, then it needs to run the prerequisite passes first. See the sc tool in the SAFECode source code for an example. 2) For prerequisite *analysis* passes (like LoopInfo), your ModulePass can declare them as prerequisites and get access to them using the getAnalysis<PassName>(Function *) method. This is documented in the "Writing an LLVM Pass" manual (http://llvm.org/docs/WritingAnLLVMPass.html#getAnalysis). -- John T. > void MyPass::getAnalysisUsage(AnalysisUsage &AU) const { > AU.addRequired<UnifyFunctionExitNodes>(); >...

On Jul 22, 2010, at 2:05 PM, John Criswell wrote: > If you write your pass as a ModulePass, then you can iterate over the > functions in any order that you want. I had considered that, but my FunctionPass depends on other passes processing the functions first: void MyPass::getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<UnifyFunctionExitNodes>();

Hi, I am trying to set a prerequisite pass. void PassName::getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); AU.addRequired<LiveVariables>(); } But when i am running the pass with the opt i get this error: undefined symbol: _ZN4llvm13LiveVariables2IDE If you need more information ... Thank you. -------...

On Jul 23, 2010, at 7:36 AM, John Criswell wrote: > 2) For prerequisite *analysis* passes (like LoopInfo), your ModulePass > can declare them as prerequisites and get access to them using the > getAnalysis<PassName>(Function *) method. Yes, I remember trying this before but was unsuccessful. I made a second attempt just now and am again running into the same issue: bool MyModulePass::runOnModule(Module &M) { for (Module::iterator i = M.begin(), e = M.end(); i != e; ++i) { Function *f...

...se should >> I be doing? > Initializing them. Are you using INITIALIZE_PASS_DEPENDENCY, INITIALIZE_AG_DEPENDENCY, etc? > No. I am not sure how they work . I am trying to use the INITIALIZE_PASS macro. I get the following error error: definition or redeclaration of 'initializeMyPassNamePass' not in a namespace enclosing 'llvm' should i add the passname to a header file ? if so where? Thank you!! > -Krzysztof > > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation > __________________________...

...the result always gives out Segmentation Fault... I am > probably missing > sth? > > Implemented another new class, > class BasicCallGraph2 : public ModulePass, public CallGraph { > ..... > ... > } > The inside code is exact same as BasicCallGraph, except registered > passname to be testcgn and the information of the pass. then after > enabling and run the new pass, on a test.bc file, there is always a > segmentation fault. > > 0 libLLVM-2.7.so.1 0x00007f5cd87b1d2f > 1 libLLVM-2.7.so.1 0x00007f5cd87b238d > 2 libpthread.so.0 0x00007f5cd7ba38f0 >...

....cpp:72: warning: passing negative value `-0x000000001' for converting 2 of `bool llvm::AliasSetTracker::add(llvm::Value*, unsigned int)' Compiling LoopExtractor.cpp /home/wanderer/pkg/build/llvm/src/llvm/include/llvm/PassSupport.h: In function `llvm::Pass* llvm::callDefaultCtor() [with PassName = <unnamed>::LoopExtractor]': /home/wanderer/pkg/build/llvm/src/llvm/include/llvm/PassSupport.h:209: instantiated from `llvm::RegisterOpt<PassName>::RegisterOpt(const char*, const char*, bool) [with PassName = <unnamed>::LoopExtractor]' /home/wanderer/pkg/build/llvm/sr...

Hello, On Dec 7, 2011, at 2:07 AM, Seb wrote: > Hi all, > > I would like to add an option for LLVM 'opt' to disable a specific optimization pass from command line. > > The idea is to have something like: > > opt -O2 -disable-pass=[passname,...] > > Do you think it could be useful ? I have few questions : - Why (and when) would you us this ? - Some of the passes are executed multiple times, how would you select which invocation to disable ? Or would you disable all invocation of such passes ? - Some passes are required by an...

...ion& function ); static BasicBlock* ProcessCase( SwitchInst* switchInst, int caseIdx, BasicBlock* prevBB, Value* testValuePtr ); static void ReduceTempVarsLifetime( Function& function ); static bool IsUsedOutsideParentBlock( Instruction* value ); static const std::string PassName; }; --------------------------------------------- MakeDispatcherPass.cpp--------------------------------------------- #include <map> #include <vector> #include <cassert> #include <iostream> #include <exception> #include "llvm/Type.h" #include "llvm/M...

...loading their respective libraries with multiple -load options? > > Yes. I load both the libraries with two -load options. I see both the > passes listed when run opt with --help flag Okay. This means that both passes are loading successfully. > > 2) Do both passes have a static <Passname>::ID variable defined in their > respective .cpp files? > > Yes. I also tried initializing them with different values. Just to be paranoid: each pass is using its own ID varibles, correct? > > 3) Is LiveVars an analysis pass? Does it say that it preserves all > other passes...

LLVM build without big problems in obj dir == src dir case (for example, last night tester build) But I have problem with building CVS version LLVM in obj dir != src dir case. ======= Finished building ModuleMaker debug executable (without symbols) ======= gmake[2]: Leaving directory `/usr/home/wanderer/pkg/build/llvm/obj/examples/ModuleMaker' gmake[1]: Leaving directory