https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120822
Bug ID: 120822
Summary: bad warn -Wredundant-move on return std::move
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rockeet at gmail dot com
Target Milestone: ---
#include <memory>
struct A { int a = 0; };
struct B : A {};
A fa() {
B b;
return std::move(b); // 1. should not warn
}
B fb() {
B b;
return std::move(b); // 2. should warn
}
int main() {
A a = fa();
B b = fb();
return 0;
}
1. object type does not exact match return type, std::move is not redundant.
2. object type exact match return type, std::move is redundant.
g++-13 & g++-14 does not warn at 2 but warns at 1:
warning: redundant move in return statement [-Wredundant-move]
