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replacing multiplication with bit shifts, etc

From: Quolick <quolick at conus dot info>
To: gcc at gcc dot gnu dot org
Date: Wed, 12 Aug 2015 18:00:52 +0200
Subject: replacing multiplication with bit shifts, etc
Authentication-results: sourceware.org; auth=none
Reply-to: Quolick <quolick at conus dot info>

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.

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