| Issue |
128587
|
| Summary |
Missed optimization: malloc + memcpy + free => realloc
|
| Labels |
missed-optimization
|
| Assignees |
|
| Reporter |
Kmeakin
|
https://godbolt.org/z/YWxW7h8sP
```c++
#include <cstdlib>
#include <cstring>
#include <memory>
extern "C" {
auto src1(void* p1, size_t old_len, size_t new_len) -> void* {
void* p2 = malloc(new_len);
memcpy(p2, p1, old_len);
free(p1);
return p2;
}
auto tgt1(void* p1, size_t old_len, size_t new_len) -> void* {
return realloc(p1, new_len);
}
}
```
alive proof: https://alive2.llvm.org/ce/z/RwPKVk
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