[Bug other/11280] New: Manual incorrect WRT -freorder-blocks

[gschafer at zip dot com dot au]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11280

           Summary: Manual incorrect WRT -freorder-blocks
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gschafer at zip dot com dot au
                CC: gcc-bugs@gcc.gnu.org
  GCC host triplet: i686-pc-linux-gnu

The manual item for -freorder-blocks says:-

Enabled at levels -O2, -O3, -Os.

Yet, in the same manual, the item for -Os says:-

-Os disables the following optimization flags:

          -falign-functions  -falign-jumps  -falign-loops 
          -falign-labels  -freorder-blocks  -fprefetch-loop-arrays

Obviously, one has to be wrong.

Compiling a test program with "-fverbose-asm -S" confirms that -freorder-blocks
is not used at -Os