similar to: Change args count in CallInstr

Hi Conrado, > I couldn't find the solution to my problem (if it has one) in the > mailing list or the source code. The problem is: how can I redefine a > function that's been called already by some other function? why do you want to do this? > Suppose I have 3 files, all compiled to bytecode through llvm-gcc (I > think it could be clang instead). > > File1.c:

Hi Duncan, > I couldn't find the solution to my problem (if it has one) in the mailing >> list or the source code. The problem is: how can I redefine a function >> that's been called already by some other function? >> > > why do you want to do this? > To implement something that is common in Lisp. Suppose I have a program that is running and can't be

I have 3 nested functions, the core function goes like this: listx<-function(x,tox) { xt=table(x) wa=sort(unique(x,fromLast=FALSE)) print(xt) print(wa) ...... return(kk) } listx get called in functionB, and functionB get called in functionC. When I test functionB, the listx function works just fine. When I call functionB from functionC, strange thing happened: My result for xt: 0.07 0.17

Hello, My code: (CallInst *CI, IRBuilder<> &B) SmallVector<Value *, 8> args; Value *v = B.CreateGlobalString("hi", "str"); args.push_back(v); SmallVector<Type*, 8> params; params.push_back(v->getType()); Module *M = B.GetInsertBlock()->getParent()->getParent(); FunctionType *printfType =

Hi, I'm trying to write a small piece of code that inlines all calls to a particular function. The codes is as follows Function* klee_check_divF = module->getFunction("klee_div_zero_check"); assert(klee_check_divF != 0 && "Failed to find klee_div_zero_check function"); // Hack inline checks for (Module::iterator f = module->begin(), fe =

You are probably calling setName() on the called Function, which in-turned renamed the called Function instead of replacing the called function. Depending on your use-case, if you are certain that you only need to modify CallInsts, then you could simply call CallInst::setCalledFunction , otherwise it’s probably wiser to use CallSite as a wrapper for both CallInst and InvokeInst. Do note, however,

Use *last = nullptr; for (Use &U : Src->uses()) last = &U; last->getUser()->dump(); Or any better solution? 2018-04-20 19:19 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > Is: > > > 2018-04-20 18:07 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > >> Hello, >> >> Code: https://godbolt.org/g/EG4Wi6

Maybe nicer.. auto i = Src->uses().begin(); std::advance(i, Src->getNumUses() - 1); i->getUser()->dump(); 2018-04-20 19:19 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > Use *last = nullptr; > for (Use &U : Src->uses()) > last = &U; > last->getUser()->dump(); > > > Or any better solution? > > 2018-04-20 19:19

I just realised I forgot to reply to this. Thanks for advise, it's good to know. Thanks, Dan Liew. On 30 August 2013 16:25, David Blaikie <dblaikie at gmail.com> wrote: > On Fri, Aug 30, 2013 at 7:53 AM, Daniel Liew <daniel.liew at imperial.ac.uk> wrote: >> Hi, >> >> I'm trying to write a small piece of code that inlines all calls to a >> particular

You might want to look more carefully at how you're constructing the MemoryLocation.   The first argument is a pointer, and the second argument is the number of bytes pointed to by that pointer (or MemoryLocation::UnknownSize if the number of bytes accessed isn't known). More generally, copy-pasting code you don't understand isn't a good idea. -Eli On 5/22/2018 4:02 PM, Dávid

Yeah, sorry for that. Better "It compiles ok (but maybe incorrect code)", not "It works" as I wrote. 2018-05-23 1:08 GMT+02:00 Friedman, Eli <efriedma at codeaurora.org>: > You might want to look more carefully at how you're constructing the > MemoryLocation. The first argument is a pointer, and the second argument > is the number of bytes pointed to by

It works with MemoryLocation MemoryLocation::get(const CallInst *CI) { AAMDNodes AATags; CI->getAAMetadata(AATags); const auto &DL = CI->getModule()->getDataLayout(); return MemoryLocation(CI, DL.getTypeStoreSize(CI->getType()), AATags); } Is it fine? :) 2018-05-22 23:56 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > Looks like there are many overloads

Hi Dávid, Looks like you can defeat the switch conversion by adding a dummy asm(“”): #define likely(x) __builtin_expect((x),1) // switch like char * b(int e) { if (likely(e == 0)) return "0"; asm(""); if (e == 1) return "1"; else return "f"; } Dave > On May 9, 2018, at 2:33 PM, Dávid Bolvanský via llvm-dev

IR: define i32 @calloc_strlen_write_between() { %call = tail call noalias i8* @calloc(i32 10, i32 1) store i8 97, i8* %call, align 1 %call1 = tail call i32 @strlen(i8* %call) ret i32 %call1 } static bool eliminateStrlen(CallInst *CI, BasicBlock::iterator &BBI, AliasAnalysis *AA, MemoryDependenceResults *MD, const DataLayout &DL, const TargetLibraryInfo *TLI,

Hello, In my module I have functions: a b c f3 calls "a" f2 calls "a" f1 calls "b" I would like to modify a CallInst in the f2. Now it calls "a", but I want changed it to "c". When loop over the instructions of the f2, I can get a CallInst to be modified, then I use "setName" to changed it to "c". Problem is, since

Full stack trace: opt: /home/xbolva00/LLVM/llvm/include/llvm/ADT/Optional.h:176: T* llvm::Optional<T>::getPointer() [with T = llvm::MemoryLocation]: Assertion `Storage.hasVal' failed. Stack dump: 0. Program arguments: opt aaa.ll -dse -S 1. Running pass 'Function Pass Manager' on module 'aaa.ll'. 2. Running pass 'Dead Store Elimination' on function

Looks like there are many overloads for "get". http://llvm.org/doxygen/MemoryLocation_8cpp_source.html But nothing for CallInst. Any suggestions how to do a proper one? I will look at it too. 2018-05-22 23:34 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > Full stack trace: > > opt: /home/xbolva00/LLVM/llvm/include/llvm/ADT/Optional.h:176: T* >

* if (isStringFromCalloc(Dst, TLI)) should be if (!isStringFromCalloc(Dst, TLI)) but still asserting... 2018-05-22 23:06 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > Can you help a bit? > > I try to work with DSE but I got the following assert: > opt: /home/xbolva00/LLVM/llvm/include/llvm/ADT/Optional.h:176: T* > llvm::Optional<T>::getPointer() [with T

I did https://bugs.llvm.org/show_bug.cgi?id=37368 2018-05-09 20:33 GMT+02:00 Dávid Bolvanský <david.bolvansky at gmail.com>: > I did > > https://bugs.llvm.org/show_bug.cgi?id=37368 > > 2018-05-09 20:29 GMT+02:00 David Zarzycki <dave at znu.io>: > >> I’d wager that the if-else chain is being converted to a "switch >> statement” during an optimization

Hello, #define likely(x) __builtin_expect((x),1) // switch like char * b(int e) { if (likely(e == 0)) return "0"; else if (e == 1) return "1"; else return "f"; } GCC correctly prefers the first case: b(int): mov eax, OFFSET FLAT:.LC0 test edi, edi jne .L7 ret But Clang seems to ignore _builtin_expect hints in this case.