------- Comment #18 from rask at gcc dot gnu dot org 2007-12-19 14:15 -------
Created an attachment (id=14795)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14795&action=view)
(u)mulsidi3 patch
This patch (in testing) improves the register allocation, removing the last
redundant movl instructions:
mul:
pushl %ebx # 40 *pushsi2 [length = 1]
movl 8(%esp), %ebx # 28 *movsi_1/1 [length = 4]
movl 16(%esp), %eax # 30 *movsi_1/1 [length = 4]
movl 20(%esp), %ecx # 37 *movsi_1/1 [length = 4]
movl 12(%esp), %edx # 38 *movsi_1/1 [length = 4]
imull %ebx, %ecx # 7 *mulsi3_1/3 [length = 3]
imull %eax, %edx # 8 *mulsi3_1/3 [length = 3]
addl %edx, %ecx # 9 *addsi_1/1 [length = 2]
mull %ebx # 33 *umulsidi3 [length = 2]
popl %ebx # 43 popsi1 [length = 1]
leal (%ecx,%edx), %edx # 39 *lea_1 [length = 3]
ret # 44 return_internal [length = 1]
--
rask at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rask at gcc dot gnu dot org
|dot org |
Status|RESOLVED |ASSIGNED
Resolution|DUPLICATE |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=6585
