https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126202
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
ix86_update_stack_alignment_2 got
(mem:V16SI (plus:DI (mult:DI (reg:DI 0 ax [orig:158 _101 ] [158])
(const_int 8 [0x8]))
(reg/f:DI 5 di [169])) [13 S64 A512])
and RTL points-to isn't available. ix86_decompose_address got
(gdb) call debug (parts.base)
(reg/f:DI 5 di [169])
(gdb) call debug (parts.index)
(reg:DI 0 ax [orig:158 _101 ] [158])
(gdb) call debug (parts.disp)
<nil>
(gdb)
It assumes that this is on stack. But %rdi comes from:
(insn 126 3 47 6 (set (reg/f:DI 5 di [169])
(symbol_ref:DI ("s_polygonUv") [flags 0x2] <var_decl 0x7f54beafb000
s_polygonUv>)) 99 {*movdi_internal}
(expr_list:REG_EQUIV (symbol_ref:DI ("s_polygonUv") [flags 0x2] <var_decl
0x7f54beafb000 s_polygonUv>)
(nil)))
where s_polygonUv is a global variable.
