| Issue |
151390
|
| Summary |
Missing optimization for return vector used inside a function.
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
AlexgitHubAlex
|
Optimization that removes vector allocations works correctly in simple cases. When the code becomes more complex, optimization is disabled.
`
#include <vector>
#include <iostream>
int foo() {
std::vector<int> vec1 = {16,2,77,29};
return vec1[3];
} // OK
int bar() {
std::vector<int> vec1 = {16,2,77,29};
std::cout << vec1[0]<< vec1[1];
return 0;
} // OK
int baz() {
std::vector<int> vec1 = {16,2,77,29};
std::cout << vec1[0]<< vec1[1];
return vec1[3];
} // Return value of part object broken remove allocation in vector implementation
`
The baz function preserves memory allocation which can be optimized.
https://godbolt.org/z/xz9jxr8GP
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