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Re: SIMPLE: A language-independent tree IR
- From: Florian Weimer <fw at deneb dot enyo dot de>
- To: "Joseph S. Myers" <jsm28 at cam dot ac dot uk>
- Cc: Joe Buck <jbuck at synopsys dot COM>, Richard Henderson <rth at redhat dot com>, Toon Moene <toon at moene dot indiv dot nluug dot nl>, Diego Novillo <dnovillo at redhat dot com>, <gcc at gcc dot gnu dot org>
- Date: Fri, 04 Jan 2002 00:05:39 +0100
- Subject: Re: SIMPLE: A language-independent tree IR
- References: <Pine.LNX.4.33.0201030038030.5222-100000@kern.srcf.societies.cam.ac.uk>
"Joseph S. Myers" <jsm28@cam.ac.uk> writes:
> We have this for C. Function calls cannot be interleaved, but may happen
> in either order.
I hope that this requirement is applicable only to the externally
visible efffect. A few days ago, I looked at assembler output from
GCC 2.8.1, and I think there were some interleaved function calls
(without externally visible effect, of course).
In addition, there are quite a few C compilers which perform massive
optimization in this direction, actually executing function calls *in*
*parallel*.