------- Comment #5 from bonzini at gnu dot org 2009-11-07 09:35 -------
Confirmed, the code for -O2 -funroll-loops includes things such as
movzwl 2(%eax), %esi
movl $1, -44(%ebp)
subl %ecx, -44(%ebp)
movl -44(%ebp), %edi
movzbl (%edx,%edi), %ebx
addl %ebx, %esi
movl %esi, %ebx
movb %bl, 1(%edx)
...
movl -44(%ebp), %ebx
movzwl 2(%esi), %edi
movzbl (%edx,%ebx), %ebx
addl %ebx, %edi
movl %edi, %ebx
movb %bl, 1(%edx)
The unrolling is done on the tree level, so it's CSE who'd need to know this.
--
bonzini at gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |ra
Known to work| |4.5.0
Last reconfirmed|0000-00-00 00:00:00 |2009-11-07 09:35:37
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32593
