https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118312
Bug ID: 118312
Summary: Nested lambda with a single return type seems to take
too much memory
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: code-size
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rush102333 at gmail dot com
Target Milestone: ---
Consider the following code:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include<iostream>
int main()
{
const int i = 42;
auto l = [=]{
return [&](){
return i+i;
}();
};
std::cout<<sizeof(l);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The output result is 1 under clang, EDG and MSVC. But in gcc it would be 4 no
matter '-O1'~'-O3' is involved. I wonder if this needs improving.
Please see https://godbolt.org/z/rjxdMvEd5
