[Bug tree-optimization/95359] New: Failure to optimize printfs with extraneous arguments

[gabravier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95359

            Bug ID: 95359
           Summary: Failure to optimize printfs with extraneous arguments
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabravier at gmail dot com
  Target Milestone: ---

void f()
{
    printf("", 2);
}

This can be optimized to doing nothing (the extraneous arguments should be
ignored and just evaluated by themselves, it's not UB). This transformation is
done by LLVM, but not by GCC.