https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63175
--- Comment #20 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to rguent...@suse.de from comment #19)
Please remove the extern from the first test and try again (it's a vestige of
the second test). Here's the assembly emitted by 4.8.3 for the first test
(without the extern):
$ cat u.c && gcc -DT="int" -O2 -ftree-vectorize -maltivec -S u.c && cat u.s
const T a [] = { 1, 2, 3, 4, 5 };
T b[sizeof a / sizeof *a];
void g (void)
{
const T *p = a;
T *q = b + 1;
*q++ = *p++;
*q++ = *p++;
*q++ = *p++;
*q++ = *p++;
}
.file "u.c"
.section ".toc","aw"
.section ".text"
.section ".toc","aw"
.LC0:
.quad b
.section ".text"
.align 2
.p2align 4,,15
.globl g
.section ".opd","aw"
.align 3
g:
.quad .L.g,.TOC.@tocbase
.previous
.type g, @function
.L.g:
addis 9,2,.LC1@toc@ha
addis 10,2,.LC0@toc@ha
addi 9,9,.LC1@toc@l
lxvw4x 32,0,9
ld 9,.LC0@toc@l(10)
li 10,4
stxvw4x 32,9,10
blr
.long 0
.byte 0,0,0,0,0,0,0,0
.size g,.-.L.g
.comm b,20,4
.globl a
.section .rodata
.align 4
.type a, @object
.size a, 20
a:
.long 1
.long 2
.long 3
.long 4
.long 5
.section .rodata.cst16,"aM",@progbits,16
.align 4
.LC1:
.4byte 1
.4byte 2
.4byte 3
.4byte 4
.ident "GCC: (GNU) 4.8.3 20140911 (Red Hat 4.8.3-9)"
.section .note.GNU-stack,"",@progbits
