Add a commented code how to generate movdqa UNSPEC insn.
@@ -777,6 +777,13 @@ static void target_make_prolog_epilog (gen_ctx_t gen_ctx, bitmap_t used_hard_reg
new_insn = MIR_new_insn (ctx, MIR_SUB, sp_reg_op, sp_reg_op,
MIR_new_int_op (ctx, block_size + service_area_size));
gen_add_insn_before (gen_ctx, anchor, new_insn); /* sp -= block size + service_area_size */
+#if 0
+ gen_add_insn_before (gen_ctx, anchor,
+ _MIR_new_unspec_insn (ctx, 3, MIR_new_int_op (ctx, 0),
+ _MIR_new_hard_reg_mem_op (ctx, MIR_T_D, 0, SP_HARD_REG,
+ MIR_NON_HARD_REG, 1),
+ _MIR_new_hard_reg_op (ctx, XMM13_HARD_REG)));
+#endif
if (func->vararg_p) {
#ifndef _WIN64
start = block_size;
