similar to: [LLVMdev] dyn_cast<BitCastInst> fails?

I am trying to change this define void @main(float* noalias %arg0, float* noalias %arg1, float* noalias %arg2) { entrypoint: %0 = bitcast float* %arg1 to <4 x float>* intothis define void @main(float* noalias %arg0, float* noalias %arg1, float* noalias %arg2) { entrypoint: %0 = getelementptr float* %arg1, i64 0 %1 = bitcast float* %0 to <4 x float>* I must be close but

My pass is looking at StoreInsts acting on global variable that happen to be function pointers. From these StoreInsts I would like to get useful information(the function used if a direct assignment, function pointer used, etc) from the getValueOperand() method. Looking through several examples I see that this can return several things like: GlobalVariable, Function, LoadInst or BitCastInst

Hi, I have a doubt with GEP transformation in the instruction-combiner. Consider below test-case: struct ABC { int A; int B[100]; struct XYZ { int X; int Y[100]; } OBJ; }; void Setup(struct ABC *); int foo(int offset) { struct ABC *Ptr = malloc(sizeof(struct ABC)); Setup(Ptr); return Ptr->OBJ.X + Ptr->OBJ.Y[33]; } Generated IR for the test-case: define i32 @foo(i32

Hi all, Usually if we want to get the called Function we can directly use CallInst->getCalledFunction(), however, today i encounter an unusual CallInst as follows: %call11 = call double (...)* bitcast (double ()* @quantum_frand to double (...)*)() the original C source involve type cast: float u,v; extern double quantum_frand(); u = 2 * quantum_frand() - 1; v = 2 * quantum_frand() -

I'm trying to create a GlobalVariable that is a ConstantArray. Id like each element to be a pointer to other things in the program(global variables, functions). So that they all have the same type Id like to make the elements void pointers. I think I am going about this wrong, heres how I am doing it: void writeArray(Module &M, GlobalVariable *shadow, Function *val,

Hi all, > If I read the standard correctly, the properties of these address spaces can > be fully captured by defining the relationship between every pair of address > spaces (disjoint, identical, subset/superset). > > I think it would make sense to make these relationships backend/platform > specific, but for clang and the optimization passes to properly work with > address

On 5/16/11 9:35 AM, Chuck Zhao wrote: > I have the following prototype for a function: > void bkp_memory(char *, int); > > Inside my LLVM IR, I have a callsite looks like the following: > tail call void @bkp_memory(i8* bitcast (i32** @P to i8*), i32 4) nounwind > > > When I try to obtain its 1st argument and check whether it is a valid > instruction, using: >

I have the following prototype for a function: void bkp_memory(char *, int); Inside my LLVM IR, I have a callsite looks like the following: tail call void @bkp_memory(i8* bitcast (i32** @P to i8*), i32 4) nounwind When I try to obtain its 1st argument and check whether it is a valid instruction, using: Instruction *Inst = dyn_cast<Instruction *>(I->getOperand(0)); it gives me a

Hi, I am writing an alias profiler using the points-to relation. For this I'm inserting a function call of external function with the following type profile(int,int,int,void*,void*,...) I'm trying to pass the dereferenced pointer's memory address and the address of the location who are in alias set of the pointer. For this i'm using BitCastInst BitCastInst *init1= new

Hi Dan, > Changing PromoteCastOfAllocation to not replace aggregate allocas with > non-aggregate allocas if they have GEP users sounds reasonable to me. This sounds reasonable indeed, but still a bit arbitrary. Haven't figured out anything better yet, though. > Finding the maximum alignment is sometimes still useful though, so > it would be nice to update the alignment field of

I noticed a strange behavior when a non-prototyped user-defined function is called. E.g. for the following test.c code segment: void foo(void); void bar(void); void foo(void){ bar(); } void bar(void){ printf("inside bar()"); } LLVM-GCC 2.7 -O0 will generate the following code for foo(), which is all fine. define void @foo() nounwind { entry: * call void @bar() nounwind*

On 10/20/11 11:34 AM, ret val wrote: > I'm a bit confused. For the Type did you mean something like: > ArrayType *type = ArrayType::get(Type::getInt8PtrTy(M.getContext()), 4); I assume that creates an ArrayType of 4 elements whose elements are pointers to 8-bit values. If so, then this is what I meant. > This does not work, it gives me ""Wrong type in array

On Sep 13, 2008, at 1:07 PM, Matthijs Kooijman wrote: > Hi Dan, > >> Changing PromoteCastOfAllocation to not replace aggregate allocas >> with >> non-aggregate allocas if they have GEP users sounds reasonable to me. > This sounds reasonable indeed, but still a bit arbitrary. Haven't > figured out > anything better yet, though. > >> Finding the

So, you need to bitcast `pinst` to a pointer to Vector of double, since it (I hope for your sake) is a pointer to integer. What you are trying to do is bitcast a pointer into a vector, which probably will lead to an assert or "bad code that doesn't work". -- Mats On 15 April 2015 at 21:57, zhi chen <zchenhn at gmail.com> wrote: > What I want to do is to change the pInst

On Mon, Nov 30, 2015 at 7:24 PM Gao, Yunzhong < yunzhong_gao at playstation.sony.com> wrote: > According to > http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html, > "The high-order double-precision value (the one that comes first in > storage) must have the larger magnitude." > > So the order of the two doubles in your fp128 is not affected by the

Ah! I get it now. Thanks a lot ! I changed it to BitCastInst(AI,VoidPtrTy,"",j); And now I am getting the following error :(. I have been stuck with this error before also. I know I am missing out something silly. What is the cause of this error and Please let me know how to fix it. /home/bhavani/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp:1130: llvm::SDOperand

Hello, I recently ran into an issue where I wanted to use dyn_cast with a Multiple Inheritance hierarchy. LLVM’s help page on RTTI claims that it can be done, and that Clang’s Decl and DeclContext implement it; however, when I try to use it I run into odd behavior. Here’s my sample code which doesn’t work: ``` struct Base { void *ptr; bool hasInfo; }; struct Info { int size; static

Thanks Nick! ok. I ran through the verifier and this is the issue: verifying... Instruction does not dominate all uses! %tmp3 = add i32 %b, %a ; <i32> [#uses=2] store i32 %tmp3, i32* %0, align 4 Broken module found, compilation aborted! add is existing instruction in function. store is the instruction I have added to the function. How do I fix this now :(? Thanks, Bhavani --- On Mon,

I'm a bit confused. For the Type did you mean something like: ArrayType *type = ArrayType::get(Type::getInt8PtrTy(M.getContext()), 4); This does not work, it gives me ""Wrong type in array element initializer" at runtime. Also it doesn't look like ConstantExpr inherits ConstantArray, so I'm not sure how I could use this instead. Thanks On Thu, Oct 20, 2011 at

ok.. So I am trying out what you have suggested. I have written the below code which basically tries to write the constant 10 to a file. myprint is a function pointer to a function which takes char * parameter and writes it to file. Value *Ten = ConstantInt::get(Type::Int32Ty, 10); const Type *VoidPtrTy = PointerType::getUnqual(Type::Int8Ty); AllocaInst *AI = new AllocaInst(Type::Int32Ty); Value