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[PATCH] ARM. Simplify (IOR (COMPARISON) (AND))

From: Richard Earnshaw <rearnsha at arm dot com>
To: gcc-patches at gcc dot gnu dot org
Cc: Richard dot Earnshaw at arm dot com
Date: Sat, 06 Dec 2003 14:23:24 +0000
Subject: [PATCH] ARM. Simplify (IOR (COMPARISON) (AND))
Organization: ARM Ltd.
Reply-to: Richard dot Earnshaw at arm dot com

This patch adds a couple of define splits for ARM code that allows us to 
convert the sequence

	and	Rd, Rd, #1
	cmp	...
	orrXX	Rd, Rd, #1
	cmp	Rd, #0

(where XX is any condition) into

	cmp	...
	orrXX	Rd, Rd, #1
	tst	Rd, #1



saving an instruction.

Two splits are necessary because there is no default canonicalization for 
AND and COMPARISON in a commutative operand.

Bootstrapped and regression tested on arm-netbsdelf.

R.

2003-12-06  Richard Earnshaw  <reanrsha@arm.com>

	* arm.md (IOR (COMPARISON) (AND)): New define_splits.

Attachment: ior-cmp-and.patch
Description: ior-cmp-and.patch

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