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Peephole2 Null Patterns

From: Shiv Sheshgiri <shivshesh at yahoo dot com>
To: gcc at gcc dot gnu dot org
Date: Mon, 31 Mar 2003 01:23:01 -0800 (PST)
Subject: Peephole2 Null Patterns

Dear All,

In GCC Internals,

the template for peephole2 is defined as :

(define_peephole2
	[insn-pattern-1
	 insn-pattern-2
	 ...]
	"condition"
	[new-insn-pattern-1
	 new-insn-pattern-2
	 ...]
	"preparation-statements")

In the new-insn-pattern, I wish to specify
null RTXs. That is I wish to remove some
useless RTXs generated.

Can anyone guide me on howto specify that.

Thanks and Regards,

Shiv


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