------- Comment #6 from hjl dot tools at gmail dot com 2010-06-30 18:15 -------
Created an attachment (id=21045)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21045&action=view)
A patch
Using
(set (match_operand:HI "register_operand" "=a")
(ior:HI (ashift:HI
(zero_extend:HI (umod:QI (match_operand:QI "register_operand" "0")
(match_operand:QI "register_operand" "q")))
(const_int 8 [0x8]))
(zero_extend:HI (udiv:QI (match_dup 1) (match_dup 2))))
before reload and split to
(set (match_dup 0)
(ior:HI (ashift:HI (umod:HI (match_dup 0)
(zero_extend:HI (match_dup 2)))
(const_int 8 [0x8]))
(udiv:HI (match_dup 0)
(zero_extend:HI (match_dup 2))))
will generate extra QI->HI extend during split. This patch
uses subreg instead. Does it look OK?
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #21033|0 |1
is obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44695
