https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78116
--- Comment #14 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
(In reply to amker from comment #13)
> We should create another PR for additional copy instructions after my patch
> and close this one. IMHO they are two different issues.
Yes, I agree. Yuri, can you take care of that?
Additional info, it's really just one copy introduced, but becomes 4 after
unrolling. This is the loop from the first testcase without -funroll-loops.
Looks like we could get rid of the vmovaps by making zmm2 the dest on the
vpermps (assuming I'm understanding the asm correctly).
.L26:
vpermps (%rcx), %zmm10, %zmm1
leal 1(%rsi), %esi
vmovaps %zmm1, %zmm2
vmaxps (%r15,%rdx), %zmm3, %zmm1
vfnmadd132ps (%r12,%rdx), %zmm7, %zmm2
cmpl %esi, %r8d
leaq -64(%rcx), %rcx
vmaxps %zmm1, %zmm2, %zmm1
vmovups %zmm1, (%rdi,%rdx)
leaq 64(%rdx), %rdx
ja .L26
