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From: Szabolcs Nagy <nsz@port70.net>
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Subject: Re: build musl with clang
Date: Fri, 24 Aug 2012 21:04:22 +0200
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* agent <agentprog@gmail.com> [2012-08-25 00:55:34 +0600]:
> that not only 'if (p[-1])' gets wiped out but any 'if (p[i])'.
> though the nature of this i suppose the same

yes

you can try the same code with another function name
instead of malloc
(eg add a void *foobar(size_t); prototype and use that)

if the generated code is different then that clearly
demonstrates the bug in -ffreestanding