[Bug rtl-optimization/114215] New: GCC makes wrong decision for inline with -Os or -Oz to deal with trivial functions

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114215

            Bug ID: 114215
           Summary: GCC makes wrong decision for inline with -Os or -Oz to
                    deal with trivial functions
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: unlvsur at live dot com
  Target Milestone: ---

This is a very common example for implementing a bounds checking vecotr index.
GCC makes the wrong decision. This even increases the code size but not
decreases the size compared to -O3.

GCC with -Oz
https://godbolt.org/z/sa9YYqnYY
GCC with -Ofast
https://godbolt.org/z/b6jahvh6s

clang with -Oz
https://godbolt.org/z/GxPaxP66b