[Bug tree-optimization/102676] New: Failure to optimize out malloc/nothrow allocation that's only used for bool checking

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102676

            Bug ID: 102676
           Summary: Failure to optimize out malloc/nothrow allocation
                    that's only used for bool checking
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

#include <new>
#include <stdlib.h>

bool f()
{
  return new(std::nothrow) int;
}

bool g()
{
    return malloc(1);
}

Both these functions can be optimized to `return true;`. This optimization is
done by LLVM, but not by GCC.