https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82100
Richard Hazlewood <gcc at hazlewoods dot net> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gcc at hazlewoods dot net
--- Comment #7 from Richard Hazlewood <gcc at hazlewoods dot net> ---
Here's one that slipped through our net, that ought to have been obvious to the
human reviewers...
#include <iostream>
#include <cstdlib>
void fn(bool const b)
{
if (b)
{
std::cout << "side effect 1\n";
}
else if (!b)
{
std::cout << "side effect 2\n";
}
else
{
std::cout << "Some important thing\n";
}
}
int main()
{
for (auto n = 10; n--; )
fn(rand() & 1);
}
====
g++ 15.1
-Wall -Wextra -pedantic -std=c++20
It does optimize away the unreachable code with -O2.
(Not sure if it's just another variation of the OP, but didn't want to expand
the unreachable issues.)
