------- Comment #1 from ramana at gcc dot gnu dot org 2010-04-28 10:10 -------
On trunk I don't see the movne / moveq problem but the extra mov r3, #1 could
be removed. (I think one of Bernd's recent fixes to ifcvt.c fixed these
issues).
tst r1, #1
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #2
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #4
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #8
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #16
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #32
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #64
mov r3, #1
streq r3, [r0, #4]
strne r3, [r0, #0]
tst r1, #128
mov r3, #1
strne r3, [r0, #0]
streq r3, [r0, #4]
bx lr
--
ramana at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |missed-optimization
Known to fail| |4.5.0
Last reconfirmed|0000-00-00 00:00:00 |2010-04-28 10:10:19
date| |
Summary|Very poor code generation |[4.5 only] Unnecessary
|(unnecessary conditionals |conditionals
|and reloads) for ARM |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43908
