https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46854
Segher Boessenkool <segher at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |segher at gcc dot gnu.org
Resolution|--- |FIXED
--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Current trunk does (with -O2)
test:
mr. 10,3
lis 3,.LANCHOR0@ha
la 3,.LANCHOR0@l(3)
beqlr 0
.p2align 5,,31
.L3:
lbzu 9,1(3)
cmpwi 7,9,0
bne 7,.L3
addic. 10,10,-1
bne 0,.L3
blr
and with -Os
test:
lis 9,.LANCHOR0@ha
la 9,.LANCHOR0@l(9)
.L2:
cmpwi 7,3,0
bne 7,.L3
mr 3,9
blr
.L3:
lbzu 10,1(9)
cmpwi 7,10,0
bne 7,.L3
addi 3,3,-1
b .L2
Both are reasonable, with no obvious inefficiency; I'm closing this
bug as fixed.
(Note that since a few years we generate bdnz only in inner loops).
