search for: addrequired

Hi, I am using llvm-3.8 for my project. Following is my getAnalysisUsage() method: virtual void getAnalysisUsage(AnalysisUsage &AU) const override { AU.setPreservesAll(); AU.addRequired<X>(); AU.addRequired<Y>(); AU.addRequired<Z>(); } Now, if I call getAnalysis<X>(*F), instead of invoking just the X pass, all the passes, i.e., X, Y and Z are being invoked. Could anyone help me in this regard? Thanks -- Syed

On Mar 31, 2010, at 3:13 PM, Owen Anderson wrote: > Some analyses, like Andersen's AA, do all their computation in their > runOnFunction(). Therefore, anything they depended on can be > destroyed after the runOnFunction() returns. What about AA itself? Would addRequired<AliasAnalysis> keep AliasAnalysis alive (but allow AliasAnalysis's dependencies to die)? > Others, like MemoryDependenceAnalysis, are "lazy." MDA > specifically does NOT compute results in its runOnFunction(), > instead computing results on-demand when a user q...

...When I use llvm, I encounter a problem like "unable to schedule pass A required by C" I investigated deeper. It's like: I have three passes, say A, B, C(all are on function level) A would modify IR code. (change instruction order) For pass B, I would use the result of pass A, I use addRequired<B>(), and &getAnalysis<B>(), it works. void getAnalysisUsage(AU){ AU.addRequired<A>(); } For pass C, it will use the results of pass A and B. I use the way as used for pass B, but it failed, even for LoopInfo analysis pass(which is the built-in analysis pass). void getAnaly...

...truct RegisterAnalysis ctor, but my pass doesn't appear. I put it in an anonymous namespace, it doesn't work too. The class definitions: class DependenceAnalyzer : public MachineFunctionPass { virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); AU.addRequired<LiveIntervals>(); AU.addRequired<LiveVariables>(); MachineFunctionPass::getAnalysisUsage(AU); } class RegAllocMultibank : public MachineFunctionPass { virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<LiveIntervals>(); AU.ad...

...MemoryDependenceAnalysis.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; struct Hello: public ModulePass { public: static char ID; MemoryDependenceAnalysis *MD; Hello(): ModulePass(ID) { ;; } virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<MemoryDependenceAnalysis>(); errs() << "addRequired called\n"; } virtual bool runOnModule(Module &M) { for(Module::iterator f = M.begin(); f != M.end(); ++f) runOnFunction(*f, M); return false; } private: bool runOnFunction(Function &F, Module &M) {...

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,...

...llvm.org/docs/WritingAnLLVMPass.html#specifying-interactions-between-passes>, All examples that i see here are based on collecting information .i.e Analysis Passes. I wonder if this applies to Transformation passes also. e.g. void MyInliner::getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<SimplifyCFGPass>(); // Transformation Pass AU.addRequired<AnnotatedFunctionPass>(); // Transformation like pass AU.addRequired<CallGraphSCCPass>(); // Analysis Pass } here AnnotateFunctionPass is adding meta information,so technically nothing Functional transformatio...

...LLVM learing process. I have used the following code inside my original code to get the distance vector. It is not giving any syntax error but it is has some logical but and giving segmentation fault. void getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); AU.addRequired<PostDominatorTree>(); AU.addRequired<LoopInfo>(); AU.addRequired<DependenceAnalysis>(); AU.addPreserved<DependenceAnalysis>(); AU.addRequired<ScalarEvolution>(); AU.addPreserved<ScalarEvolution>(); AU.addRequired<AliasAnalysis>();...

...gt; specifically does NOT compute results in its runOnFunction(), > > instead computing results on-demand when a user queries it. Because > > MDA depends on AA, we must ensure that, as long as MDA is alive and > > responding to queries, AA is alive as well. That is what > > addRequiredTransitive does. > > I'm not sure if I follow this. So let's say I'm writing a pass Foo, > and Foo depends on MDA. You're saying that Foo's getAnalysisUsage must > call addRequiredTransitive< MemoryDependenceAnalysis>, not > addRequired<MemoryDependenceAn...

Hi! I am trying to extend the native AliasAnalysis of LLVM to use an external analysis pass. Doing this with the legacy pass manager works fine through calling addRequired() in the getAnalysisUsage and getAnalysis() in function runOnFunction(). In the new pass manager, I haven't found a similar way of doing this. When running opt with -O3, I encounter the following error: >Assertion `ResultPass && "getAnalysis*() called on an analysis that was no...

...ass::runOnModule(Module &M) { for (auto &F : M) { SE = &getAnalysis<ScalarEvolutionWrapperPass>(F).getSE(); ...... } } return false; } void MYPass::getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); AU.addRequired<LoopInfoWrapperPass>(); AU.addRequired<ScalarEvolutionWrapperPass>(); AU.addRequired<LoopAccessLegacyAnalysis>(); AU.addRequired<DominatorTreeWrapperPass>(); AU.addRequired<OptimizationRemarkEmitterWrapperPass>(); } =====================================...

I still have the addRequired: virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<DominatorTree>(); } The other line DominatorTree *dt = &getAnalysis<DominatorTree>(); Is for later use when I try to use PromoteMemToReg On Tue, Nov 8, 2011 at 4:22 PM, M...

I wrote a pass(that is to be loaded by opt) that I would like to use in conjunction with MemoryDependenceAnalysis. I have tried using by including its header and adding this to my pass:        virtual void getAnalysisUsage(AnalysisUsage &AU) const {         errs() << "addRequired called\n";         AU.addRequired<MemoryDependenceAnalysis>();        } And in my runOnFunction() method I have:        MD = &getAnalysis<MemoryDependenceAnalysis>(); The results in:        addRequired called        Assertion failed: (ResultPass && "getAnalysis*(...

Hi, I'm a bit confused about the distinction between addRequired and addRequiredTransitive in AnalysisUsage. From PassAnalysisSupport.h: "REQUIRES (must be available when the pass runs), REQUIRES TRANSITIVE (must be available throughout the lifetime of the pass)." The part that's confusing me is "must be available when the pass runs&qu...

So I got very mixed results. With the CallGraphSCCPass, both `addRequired<DominatorTreeWrapperPass>` and `addRequired<MemoryDependenceAnalysis>` fail at runtime. The LLVM core has just two CallGraphSCCPasses and neither uses neither analyses, so it's hard to find a valid example. I transformed the pass into a ModulePass, using scc_iterator as shown in CG...

...lvm-dev at lists.llvm.org> wrote: >> >> Hi, >> >> I am using llvm-3.8 for my project. Following is my getAnalysisUsage() method: >> >> virtual void getAnalysisUsage(AnalysisUsage &AU) const override >> { >> AU.setPreservesAll(); >> AU.addRequired<X>(); >> AU.addRequired<Y>(); >> AU.addRequired<Z>(); >> } >> >> Now, if I call getAnalysis<X>(*F), instead of invoking just the X >> pass, all the passes, i.e., X, Y and Z are being invoked. Could anyone >> help me in this regar...

...ing like this: A B ^ ^ / | | | C D | ^ ^ | |\ | | | \ | \ | \ | F E The arrows represent direct use of analysis pass data. So even though C is built upon information from A, F directly accesses information from both C and A. I have tried all kinds of combinations of addRequired and addRequiredTransitive but no matter what, pass C gets rerun before pass F as expected but pass A does not. This leads to a situation where pass F uses up to date information from pass C and out of date information from pass A, leading to an analysis inconsistency and a compiler abort. Note tha...

...nclude "llvm/Analysis/MemoryDependenceAnalysis.h" #include "llvm/Support/raw_ostream.h" using namespace llvm; struct Hello: public FunctionPass { public: static char ID; Hello(): FunctionPass(ID) { ;; } virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<MemoryDependenceAnalysis>(); errs() << "addRequired called\n"; } virtual bool runOnFunction(Function &F) { if(F.isDeclaration() == true) return false; MemoryDependenceAnalysis *MD = &getAnalysis<MemoryDependenceAnalysis>(F); for(Function::iterato...

...ransforms/IPO/GlobalOpt.cpp.<br>However, depending on the order of where I add it, I see memory leak errors with LeakSanitizer.</div> <div>Having the following order shows the leak:</div> <div>void getAnalysisUsage(AnalysisUsage &AU) const override {<br> AU.addRequired<TargetLibraryInfoWrapperPass>();<br> AU.addRequired<TargetTransformInfoWrapperPass>();<br> AU.addRequired<BlockFrequencyInfoWrapperPass>();<br> AU.addRequired<DominatorTreeWrapperPass>();<br> }</div> <div><br>and changing it to...

Is it possible to AddRequired<...> a pass that is dynamically loaded? This would be very convenient for a course project but the documentation about pass interactions says nothing about dynamically loaded passes and vice versa. More specifically, to refer to the pass name in AddRequired, I need to declare it fir...