Hi Segher,

Updated as below according to your suggestion.

BR,
Kewen

--------

gcc/testsuite/ChangeLog

2020-02-10  Kelvin Nilsen  <kelvin@gcc.gnu.org>
            Kewen Lin  <linkw@gcc.gnu.org>

	* gcc.target/powerpc/p9-dform-0.c: New test.
	* gcc.target/powerpc/p9-dform-1.c: New test.
	* gcc.target/powerpc/p9-dform-2.c: New test.
	* gcc.target/powerpc/p9-dform-3.c: New test.
	* gcc.target/powerpc/p9-dform-4.c: New test.
	* gcc.target/powerpc/p9-dform-generic.h: New test.

on 2020/1/20 ÏÂÎç9:19, Segher Boessenkool wrote:
> Hi!
> 
> On Thu, Jan 16, 2020 at 05:42:41PM +0800, Kewen.Lin wrote:
>> +/* At time the dform optimization pass was merged with trunk, 12
>> +   lxv instructions were emitted in place of the same number of lxvx
>> +   instructions.  No need to require exactly this number, as it may
>> +   change when other optimization passes evolve.  */
>> +
>> +/* { dg-final { scan-assembler {\mlxv\M} } } */
> 
> Maybe you can also test there ar no lxvx insns generated?
> 

Done, thanks!