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[PATCH, i386]: Handle flag_prefer_avx128 in ix86_autovectorize_vector_sizes

From: Uros Bizjak <ubizjak at gmail dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Mon, 9 May 2011 22:49:31 +0200
Subject: [PATCH, i386]: Handle flag_prefer_avx128 in ix86_autovectorize_vector_sizes

Hello!

There is no point in trying to vectorize with 256bit vector sizes when
we prefer 128bit vectors. Also, cleanup ix86_preferred_simd_mode and
return word_mode for DFmode without SSE2.

2011-05-09  Uros Bizjak  <ubizjak@gmail.com>

	* config/i386/i386.c (ix86_autovectorize_vector_sizes): Return 0
	for !flag_prefer_avx128.
	(ix86_preferred_simd_mode): Return word_mode for DFmode without SSE2.

Tested on x86_64-pc-linux-gnu {,-m32}, committed to mainline SVN.

Uros.

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