------- Comment #15 from steven at gcc dot gnu dot org 2009-12-30 16:39 -------
With "GCC: (GNU) 4.5.0 20091228 (experimental) [trunk revision 155486]" I get
identical code at -O2 with and without -fno-ivopts for i686:
.L3:
movl %ebx, (%ecx,%eax,4)
addl $1, %eax
cmpl %edx, %eax
jb .L3
For x86_64 at -O2, there is still the extra mov. The extra mov is not there
with -Os (with and without -fno-ivopts).
Since the mov on x86_64 is essentially free, I consider this fixed for GCC
4.5.0.
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work|3.4.6 |3.4.6 4.5.0
Summary|[4.3/4.4/4.5 regression] |[4.3/4.4 regression] code
|code quality regression due |quality regression due to
|to ivopts |ivopts
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27440
