[Bug web/103077] New: This flag is enabled by default at -O3 and by -ftree-vectorize

[mathieu.malaterre at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103077

            Bug ID: 103077
           Summary: This flag is enabled by default at -O3 and by
                    -ftree-vectorize
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: web
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mathieu.malaterre at gmail dot com
  Target Milestone: ---

The online documentation for `-ftree-vectorize` is a bit misleading. Reading it
today:

* https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html

Gives:

[...]
-O2 turns on all optimization flags specified by -O1. It also turns on the
following optimization flags:
[...]
-ftree-loop-vectorize 
[...]
-ftree-slp-vectorize 
[...]

But later in the page:

[...]
-ftree-loop-vectorize
Perform loop vectorization on trees. This flag is enabled by default at -O3 and
by -ftree-vectorize, -fprofile-use, and -fauto-profile.

-ftree-slp-vectorize
Perform basic block vectorization on trees. This flag is enabled by default at
-O3 and by -ftree-vectorize, -fprofile-use, and -fauto-profile.
[...]

Please clarify documentation for -02 if it does turn on: -ftree-loop-vectorize
& -ftree-slp-vectorize. Thanks