Questions tagged [memory-aliasing]
7 questions
4
votes
1 answer
Why is assigning a container's element to the container (not) a well-defined C++?
In C++ there is the infamous problem of self-assignment: when implementing operator=(const T &other), one has to be careful of the this == &other case to not destroy this's data before copying it from other.
However, *this and other may interact in…
yeputons
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1
vote
1 answer
ARM Trustzone memory aliasing
I am trying to understand the ARM Trustzone implementation and came across the memory aliasing wherein the same memory is interpreted as secure and non-secure based on the 33rd bit of that address. I am not able to understand the concept of memory…
srikanth mucharla
- 11
- 2
1
vote
0 answers
Why do assembly need repeated operation of movzx on eax?
Code - Difference is one method is for signed short int-s and another for unsigned short int.
short signedShortIntSwap(short int* a , short int* b)
{
short tmp = *a;
*a = *b;
*b = tmp;
return *a;
}
unsigned short…
Sreeraj Chundayil
- 5,548
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1
vote
2 answers
OpenCL inter-context buffer aliasing
Suppose I have 2 OpenCL-capable devices on my machine (not including CPUs); and suppose that an evil colleague of mine creates a different context for each of them, which I have to work with.
I know I can't share buffers between contexts - not…
einpoklum
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0
votes
0 answers
How bad is memory aliasing with modern C++ compilers?
I am trying to understand the effects of memory aliasing and how to improve my code to avoid it. I am re-writing my cache coherent Entity Component System and I want to take memory aliasing into account.
The main source I have is Christer Ericson's…
GKann
- 52
- 5
0
votes
0 answers
memory aliasing in llvm
Would someone please show me how, by the means provided by the llvm library, to establish
that ( in the clang-generated IR file ) ‘foo1’ is not affected by ‘foo’:
extern double d[3];
__attribute__((noinline))
double foo1()
{
return d[2];
…
David Livshin
- 11
- 5
0
votes
0 answers
Aliasing a placeholding buffer in base class from derived class
I want to create an array of struct objects that each contain a member which holds a value. However, this value might differ in its type from object to object. As the size can't vary I decided to put a placeholding buffer in the base class which I…
glades
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