https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114853
Bug ID: 114853
Summary: Inefficient code with a bunch of bitwise checks
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: gh228df at gmail dot com
Target Milestone: ---
Here is a compiler explorer link https://godbolt.org/z/WccxhnTfK, the first
function is 'inefficient' while the second function does the same while having
1/2 assembly lines of the first function and will probably run faster in some
cases. The problem is that the compiler doesnt generate negated constant once
in the start but rather keeps generating it over and over again before every
check which is very inefficient
