http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54457
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2012-09-24
AssignedTo|unassigned at gcc dot |ubizjak at gmail dot com
|gnu.org |
Ever Confirmed|0 |1
--- Comment #2 from Uros Bizjak <ubizjak at gmail dot com> 2012-09-24 22:48:37
UTC ---
Created attachment 28261
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28261
Proposed patch
Patch that enhances combine_simplify_rtx to generate canonical binop sequences
that simplify_plus_minus can recognize and further optimize.
Bootstrapped and regression tested on x86_64-pc-linux-gnu.
Patched gcc generates expected code for the above testcase:
foo:
movzbl array+1(%edi), %eax
ret
