🚀 go-pugleaf

Dear GCC,

Can you tell me how I can match a sequence in the template of
a define_peephole ?
I want to match the following pattern:

	define_peephole
	[insn1
	 (sequence [insn2, insn3])]
	.....

But I don't know how to explicitly decompose insn2 and insn3.
How can I say PATTERN(insn2) in the template ?

Basically,  I want to merge insn1 and insn3 under some constrains,
since dbr pass moves insn3 in the delay shadow,  I have to write
this peephole as a special case of
	(define_peephole
	  [insn1 insn3]
	.....
I wonder if I can do the merge before dbr pass.

Thanks

Dong