https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95424
Bug ID: 95424
Summary: Failure to optimize division with numerator of 1
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: ---
unsigned f(unsigned x)
{
return 1 / x;
}
This can be optimized to `return (x == 1);`, and for `int` to `return
(unsigned)(x + 1) < 3 ? x : 0;`. This transformation is done by LLVM, but not
by GCC.
