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[PATCH, i386]: Fix PR 53227, FAIL: gcc.target/i386/movbe-2.c scan-assembler-times movbe[ \t] 4

From: Uros Bizjak <ubizjak at gmail dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Sun, 6 May 2012 22:45:59 +0200
Subject: [PATCH, i386]: Fix PR 53227, FAIL: gcc.target/i386/movbe-2.c scan-assembler-times movbe[ \t] 4

Hello!

Attached patch splits bswap patterns on 32bit targets by hand, as is
the case with all other DImode patterns. The patch takes into account
memory operands, where it swaps high/low word load according to
bswap/movbe insn availability, and generates xcgh %rX, %rY for reg-reg
swaps, avoiding a move to/from temporary register.

2012-05-06  Uros Bizjak  <ubizjak@gmail.com>

	PR target/53227
	* config/i386/i386.md (swap<mode>): Rename from *swap<mode>.
	(bswapdi2): Split from bswap<mode>2.  Use nonnimediate_operand
	predicate for operand 1.  Force operand 1 to register for TARGET_BSWAP.
	(bswapsi2): Ditto.
	(*bswapdi2_doubleword): New insn pattern.
	(*bswap<mode>2): Rename from *bswap<mode>2_1.

Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu.

Committed to mainline SVN.

Uros.

Attachment: p.diff.txt
Description: Text document

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