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From: Dibyendu Majumdar <mobile@majumdar.org.uk>
To: jit@gcc.gnu.org
Subject: lvalues and rvalues
Date: Thu, 01 Jan 2015 00:00:00 -0000	[thread overview]
Message-ID: <CACXZuxemh6PZS1deAj39FmGRsjkTYrLtDRJqDZnvBK2REo-gZA@mail.gmail.com> (raw)

I am still trying to get the lvalue / rvalue concepts so that I know
exactly what to use when.

I have struct with a pointer member.

struct X {
 struct Y *base;
};

Now this pointer base can be updated while the function is running so
I need the value of the pointer refreshed (loaded) whenever it can
potentially change. In LLVM I emit explicit load instructions which
are then optimized so that any redundant loads are deleted. What would
be the equivalent method here? Should I just use a rvalue reference?
Will this be automatically refreshed? Should I use a local variable
and assign the value of the base pointer to it explicitly (i.e.
similar to explicit load) ?

Thanks and Regards

Dibyendu

             reply	other threads:[~2015-06-14 10:09 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-01  0:00 Dibyendu Majumdar [this message]
2015-01-01  0:00 ` David Malcolm
2015-01-01  0:00   ` Dibyendu Majumdar

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