search for: clonefunction

Hi, I want to duplicate a function and transfer it from one module to another. I found "CloneFunction()" but it needs an "vMap". I found that "vMap" is used to map the original values to the new values. So, hypothetically, if the original function uses a global variable from the previous module and I want that use in the new function to be mapped to a global variable in the...

On 14 July 2016 at 20:07, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Jul 14, 2016, at 7:58 AM, Pierre Gagelin via llvm-dev < > llvm-dev at lists.llvm.org> wrote: > > Hi, > > I am trying to use the CloneFunction from llvm/Transforms/Utils/Cloning.h > and I don't understand how the ValueToValueMapTy argument should be > initialized. For instance, let say I want to clone this function (to add an > argument): > > define void @function(i32 %i) #0 { > entry: > %i.addr = alloca i32, al...

Hi, I am trying to use the CloneFunction from llvm/Transforms/Utils/Cloning.h and I don't understand how the ValueToValueMapTy argument should be initialized. For instance, let say I want to clone this function (to add an argument): define void @function(i32 %i) #0 { entry: %i.addr = alloca i32, align 4 store i32 %i, i32* %i.addr...

...a Forum, hosted by The Linux Foundation > -----Original Message----- > From: Tobias Edler von Koch [mailto:tobias at codeaurora.org] > Sent: Friday, February 12, 2016 9:51 AM > To: Mehdi Amini; Scott A. Carr > Cc: llvm-dev at lists.llvm.org; Sergei Larin > Subject: Re: [llvm-dev] CloneFunction during LTO leads to seg fault? > > On 02/11/2016 10:05 AM, Mehdi Amini via llvm-dev wrote: > >> Is this a bug? Is there an assumption that a function won't be cloned after > inlining? Is there an assumption that the debug info metadata nodes are well > formed when they g...

y > On Feb 11, 2016, at 8:00 AM, Scott A. Carr <carr27 at purdue.edu> wrote: > > Hello again, > > I've narrowed down my issue to a small test case. The core of the issue is that CloneFunction (with ModuleLevelChanges=true) on a function that has had other functions inlined into it generates orphan debug info metadata nodes. Then when this module is emitted, DwarfDebug crashes. > > The C program is here [1]. Note that the inliner should inline add into main. > > If compil...

Hello, I'm writing an LTO pass and I'd like to be able to duplicate a function (with debugging info). I'm trying to accomplish this with CloneFunction but it's leading to a seg fault in ld. I've whittled down my problem so that it occurs in this small pass [1]. If I run this pass with opt, I get the expected result (i.e. a valid program that calls main twice). If I run the pass during LTO, ld seg faults. Here is a pastebin of when...

...wrote: >> On Feb 9, 2016, at 10:24 AM, Scott A. Carr via llvm-dev <llvm-dev at lists.llvm.org> wrote: >> >> Hello, >> >> I'm writing an LTO pass and I'd like to be able to duplicate a function (with debugging info). I'm trying to accomplish this with CloneFunction but it's leading to a seg fault in ld. >> >> I've whittled down my problem so that it occurs in this small pass [1]. >> >> If I run this pass with opt, I get the expected result (i.e. a valid program that calls main twice). If I run the pass during LTO, ld seg fault...

Hi, we have two modules, one that we basically use as a library in which we store a lot of simple function calls, the other is small program generated at run-time. Whenever a function call for to one of the builtin functions is being called we use CloneFunction to clone the instruction from the library module and insert it in the generated module. The problem is for example when we have something like: declare float @powf(float, float) define void @pow(<4 x float>* %res, /*other args*/...) { entry: ... %call = tail call float @powf( float %tmp1,...

...2014-Dec-18, at 01:43, Keno Fischer <kfischer at college.harvard.edu> wrote: > > Hi Duncan, > > I'm in the following situation for which this change caused an assertion failure: > > Three modules, let's say A B C > Two function, F in A, G in B > > Now I CloneFunction F into B (call the new function F') and inline F' into G. > Now, for the problematic part, where I try to extract G (and all referenced values) into C: > > upon encountering any debug node in the inlined code, it tries to clone the DISubprogram for F', so it creates a tempora...

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, unless I overlook something, the second version of CloneFunction() (from http://llvm.org/doxygen/Cloning_8h_source.html): 00114 Function *CloneFunction(const Function *F, 00115 ValueToValueMapTy &VMap, 00116 bool ModuleLevelChanges, 00117 ClonedCodeInfo *CodeInfo = 0); 00118 00119 /// C...

...Subprogram (that would prohibit cloning the DICompileUnit is side-stepped). But then I remembered the discussion we had in http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20170306/435395.html and now I think that this might actually be legal IR. With this in mind, the correct behavior for CloneFunction is to not remap any debug metadata (and just attach the original nodes) if it is cloning into the same Module *and* there is not DISubprogram attached to the function. -- adrian > On Jun 20, 2017, at 7:52 AM, Sergei Larin <slarin at codeaurora.org> wrote: > > Adrian, > > T...

...efore but I can't find it by searching. > > What's the right way to clone a Function? I need to save off the text at a > certain point and spit it out later, after other optimizations have run. But > I need to spit out the original text, not the optimized version. You can use CloneFunction (in llvm/Transforms/Utils/Cloning.h) to duplicate a function within a module. That said, I'm not completely sure what you're trying to do, so I don't know if that's what you're looking for. -Eli

I seem to recall havbing asked this before but I can't find it by searching. What's the right way to clone a Function? I need to save off the text at a certain point and spit it out later, after other optimizations have run. But I need to spit out the original text, not the optimized version. What would be the most effective way to do this?

...uction, BB's, arguments, and everything you cloned will be deleted from memory, and it'll just seem like nothing was cloned. Ok, now in order to identify all the values between the two copies of the functions you need to use that ValueToValueMap that you created and used as an argument for cloneFunction. This VMap can be seen as a hash of values, and everything in the cloned function is mapped to something in the original function inside this map. So, if you need to identify an equivalent BB between them, for example, you could use VMap[BBfromOrigFunc] to access the pointer to the equivalent BB in...

...ing. > > > > What's the right way to clone a Function? I need to save off the text at > > a certain point and spit it out later, after other optimizations have > > run. But I need to spit out the original text, not the optimized > > version. > > You can use CloneFunction (in llvm/Transforms/Utils/Cloning.h) to > duplicate a function within a module. > > That said, I'm not completely sure what you're trying to do, so I > don't know if that's what you're looking for. Ok, I've looked at the cloning stuff and it's on the right t...

...his it seemed obvious to me we should disallow this by preventing two functions from sharing the same !dbg attachment. After implementing my new verifier check (and updating a couple of hand-crafted testcases that violated it) I noticed that the new check causes the cloning unit test to fail: When CloneFunction clones a function into the same module, it will not create a deep copy of the function's debug info. Before I start fixing this (which is a bit of work, because we will need to re-parent all of the function's DILocations into the cloned DISubprogram) I wanted to get everyone's opinion o...

I am trying to use CloneFunction to clone every IR function in a program, give the cloned versions a prefix and call the clones from the original functions (redirect the calls). Surprisingly, I see that after the LTO optimizations, the number of machine basic blocks in the two functions differ in some cases. Is this reasonable a...

...ome: int foo(int a, int b) { bar(a,b); … ... } I am using the following code: bool ThreadSanitizer::runOnFunction(Function &F) { ValueToValueMapTy VMap; Function *new_function = CloneFunction(&F, VMap, false); new_function->setName(functionName + “_newfunction"); F.getParent()->getFunctionList().push_back(new_function);...

...col number - DIScope - lexical scope - DILocation - inlined at location When an instruction is inlined, the first three fields will stay unchanged. But the inlined instruction will have non null "inlined at location" indicating where this instruction was inlined. - Devang Index: Utils/CloneFunction.cpp =================================================================== --- Utils/CloneFunction.cpp (revision 86036) +++ Utils/CloneFunction.cpp (working copy) @@ -20,6 +20,7 @@ #include "llvm/IntrinsicInst.h" #include "llvm/GlobalVariable.h" #include "llvm/Function.h&qu...

...t goes anyway. I'm trying to invoke the following constructor: CallInst::CallInst(Value *Func, InputIterator ArgBegin, InputIterator ArgEnd, const Twine &NameStr, BasicBlock *InsertAtEnd); My code is: using namespace llvm; void replaceByClone(Function *f, CallInst *I){ Function *clone = CloneFunction(f); BasicBlock::iterator ii(I); ReplaceInstWithInst(I->getParent()->getInstList(),ii,CallInst(clone,clone->arg_begin(),clone->arg_end())); } Compiling generates the following error: error: no matching function for call to ‘llvm::CallInst::CallInst(llvm::Function*&, llvm::ilist_it...