------- Comment #12 from ubizjak at gmail dot com 2007-12-16 23:49 -------
(In reply to comment #11)
> Open regression with no activity since February 14. Ping?
Current 4.3 SVN produces (-O3 -march=pentium4):
.L8:
movl (%ebx), %eax #* ivtmp.33, tmp84
fldl (%edi,%eax,8) #
fmull (%ecx) #* ivtmp.35
faddp %st, %st(1) #,
addl $1, %edx #, i
addl $4, %ebx #, ivtmp.33
addl $8, %ecx #, ivtmp.35
cmpl %edx, %esi # i, rowRp1
jg .L8 #,
(+ -fno-ivopts):
.L8:
movl (%esi,%edx,4), %eax #, tmp76
fldl (%edi,%eax,8) #* x
movl 16(%ebp), %eax # val, <-----here
fmull (%eax,%edx,8) #
faddp %st, %st(1) #,
addl $1, %edx #, i
cmpl %edx, %ecx # i, rowRp1
jg .L8 #,
We regressed vs. 4.2 in this case; "val" is loaded inside the loop.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21676
