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Add volatile qualifications to two blocks of inline asm to stop GCC from
author
Adam Langley
<agl@chromium.org>
Mon, 3 Jun 2013 19:45:11 +0000
(15:45 -0400)
committer
Ben Laurie
<ben@links.org>
Tue, 4 Jun 2013 17:46:25 +0000
(18:46 +0100)
eliminating them as dead code.
Both volatile and "memory" are used because of some concern that the compiler
may still cache values across the asm block without it, and because this was
such a painful debugging session that I wanted to ensure that it's never
repeated.
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