search for: getprimitivesizeinbites

Daniel Waterworth <da.waterworth at googlemail.com> writes: [snip] Use the getElementType method of PointerType. >> size_t size; >> if (isa<PointerType>(allocated_type)) { >> size = sizeof(void*) * 8; >> } else { >> size = allocated_type->getPrimitiveSizeInBits(); >> } >> // size now equals the size (in bits) of the type allocated

Hello, I'm wondering if it's possible to dereference a PointerType. I have an AllocaInst and although I can find the number of elements allocated, (using Instruction::getOperand(0)), I can't find a way to get the size of each element. What I'd like to do is: AllocaInst *alloca; PointerType *ptr_type = dynamic_cast<PointerType*>(alloca); assert(ptr_type); Type

The documentation of LLVM says that "The llvm.objectsize intrinsic is lowered to a constant representing the size of the object concerned". I'm attempting to lower this intrinsic function to a constant in a pass. Below is the code snippet that I wrote: for (BasicBlock::iterator i = b.begin(), ie = b.end(); (i != ie) && (block_split == false);) { IntrinsicInst *ii =

2009/10/20 Daniel Waterworth <da.waterworth at googlemail.com> > Hello, > > I'm wondering if it's possible to dereference a PointerType. I have an > AllocaInst and although I can find the number of elements allocated, (using > Instruction::getOperand(0)), I can't find a way to get the size of each > element. What I'd like to do is: > > AllocaInst

Dear all I am trying to get the size of an LLVM pointer type. getPrimitiveSizeInBits() returns 0 for it and the documentation for isSized() suggest to use TargetData. I figured out from Kaleidoscope example that one can get a pointer to TagetData object through the execution engine but it seems to be an overkill. What is the right way to do it? Best regards, Victor -------------- next part

It may not be the best way to do what I'm trying to do, but it's not useless and bogus. Consider the following: %1 = alloca i32* ; %1 is of type i32**, dereferenced it becomes a type i32* and ; the size of that is sizeof(void *) bytes Having said that I am looking at the target data getTypeAllocSize method. Daniel 2009/10/20 Duncan Sands <baldrick at

Thanks for your reply. I'm attempting to expand KLEE to support this intrinsic function. That's why I need to handle this myself. According to the reply, the correct implementation should first find the definition of the object and then determine the size of the object. BTW, can I just refer to the implementation in InstCombineCalls.cpp. On Wed, Nov 5, 2014 at 2:24 PM, Matt Arsenault

Hi folks, Assuming that I'm writing a pass and that for bizarre reasons I need to programmatically do the equivalent of a C/C++ sizeof on a Value (or a Type, it doesn't matter which really), yielding a result in bytes, what is the known-safe way to do this? I notice that doing something like struct thingy { ... some stuff ... }; ... printf("Size = %d",

Hi everyone, I have some trouble in instrumenting load instructions. I want to instrument load instructions as follow: Firstly, I judge whether the loaded pointer(*any type is possible*) is NULL. If so, I want to explicitly allocate the corresponding address space of its type to the pointer. For example, in source code level I want to translate the next statement *p = 1; into the next

Óscar Fuentes wrote: > Daniel Waterworth <da.waterworth at googlemail.com> writes: > > [snip] > > Use the getElementType method of PointerType. > >>> size_t size; >>> if (isa<PointerType>(allocated_type)) { >>> size = sizeof(void*) * 8; >>> } else { >>> size = allocated_type->getPrimitiveSizeInBits(); >>>

Daniel Waterworth <da.waterworth at googlemail.com> writes: > It may not be the best way to do what I'm trying to do, but it's not useless > and bogus. Consider the following: > > %1 = alloca i32* ; %1 is of type i32**, dereferenced it becomes a type i32* > and > ; the size of that is sizeof(void *) bytes What Duncan says is that any valid

Victor Zverovich wrote: > Dear all > > I am trying to get the size of an LLVM pointer type. > getPrimitiveSizeInBits() returns 0 for it and the documentation for > isSized() suggest to use TargetData. > I figured out from Kaleidoscope example that one can get a pointer to > TagetData object through the execution engine but it seems to be an > overkill. > What is the

Hi All, I am trying to check if a Value type is a int32 pointer by using if(T == Type::getInt1PtrTy(Context, AS)) ... I am trying to understand the AS (address space). How do I get it? Thanks. George * * -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110606/775e4f09/attachment.html>

On 6 June 2011 17:08, George Baah <georgebaah at gmail.com> wrote: > if(T == Type::getInt1PtrTy(Context, AS)) ... Hi, You don't need to care about address spaces to check for an int32*: if (T->isPointerTy()) { const Type* intT = cast<PointerType>(T)->getElementType(); if (intT->isIntegerTy() && intT->getPrimitiveSizeInBits() == 32) cout <<

For those targets supported by LLVM, you can get their TargetData by creating TargetMachine first (take X86 as example): ==== BEGIN CODE SNIPPET ==== const std::string TripleStr = "i686-unknown-linux"; // hard coded for example const std::string FeatureStr = ""; // hard coded for example std::string Err; const Target* T; TargetMachine* TM = NULL; const

Just want to test out the LLVM's AliasAnalysis::getModRefInfo API. The input C code is very simple: void foo(int *a, int *b) { for(int i=0; i<10; i++) b[i] = a[i]*a[i]; } int main() { int a[10]; int b[10]; for(int i=0; i<10; i++) a[i] = i; foo(a,b); return 0; } Obviously, for "foo", it only reads from array "a" and only writes to array

I am trying to get the address ranges that are allocated by the global variable list of a module. I cannot seem to find an easy way to get the size of a global variable. That is, if the C source looks like: int a[3]; then printing the description of the type of this global looks like: [3 x i32]* Is there some nice way to get "3 words" or "12 bytes" from the above example?

On Jun 6, 2011, at 10:05 AM, Renato Golin wrote: > On 6 June 2011 17:08, George Baah <georgebaah at gmail.com> wrote: >> if(T == Type::getInt1PtrTy(Context, AS)) ... > > You don't need to care about address spaces to check for an int32*: > > if (T->isPointerTy()) { > const Type* intT = cast<PointerType>(T)->getElementType(); > if

Hi all, I am trying to get the size of memory access (load) using dyn_cast<LoadInst>(Inst)->getType()->getPrimitiveSizeinBit(), which works for most cases. However, for load instructions like "%18 = load i8*, i8** %11, align 8, !tbaa !10" where we have double star (**) pointer access, such method would only return a value of 0. I am wondering is there any method that

Hi, I'm reading the code in CBackend.cpp and found some wired chunk in void CWriter::printConstant(Constant *CPV) 938 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) { 939 const Type* Ty = CI->getType(); 940 if (Ty == Type::Int1Ty) 941 Out << (CI->getZExtValue() ? '1' : '0'); 942 else if (Ty == Type::Int32Ty) 943 Out << CI->getZExtValue() <<