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Re: replacing multiplication by bit shifts, etc

From: Alan Lawrence <alan dot lawrence at arm dot com>
To: Quolick <quolick at conus dot info>
Cc: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Wed, 12 Aug 2015 17:54:49 +0100
Subject: Re: replacing multiplication by bit shifts, etc
Authentication-results: sourceware.org; auth=none
References: <1439395261 dot 91061 dot ezmlm at gcc dot gnu dot org>

Hi!

All compilers can replace multiplication operation by bit shifts and LEA x86 instruction
(if current target arch is x86).
Can I ask, where in GCC this happens? I can't find it in source code.


See gcc/expmed.c, search for "choose_mult_variant".

HTH
Alan

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