Interaction between optimizer and inline asm in gcc?

Christopher Brian Colohan <colohan+@cs.cmu.edu>
17 May 2002 00:27:03 -0400

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Interaction between optimizer and inline asm in gcc? colohan+@cs.cmu.edu (Christopher Brian Colohan) (2002-05-17)
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From: Christopher Brian Colohan <colohan+@cs.cmu.edu>
Newsgroups: comp.compilers
Date: 17 May 2002 00:27:03 -0400
Organization: Carnegie Mellon Univ. -- Computer Science Dept.
Keywords: GCC, question
Posted-Date: 17 May 2002 00:27:03 EDT

I am working on an architecture research project where we are using
inline assembly instructions to instrument and change the behaviour of
loops.


I was wondering if anyone has looked into the impact of doing this on
gcc's optimizer: in other words, how conservatively does gcc treat
inline asm statements? For example, would inserting such a statement
inhibit loop unrolling?


Thanks!


Chris
--
Chris Colohan Email: chris@colohan.ca PGP: finger colohan@cs.cmu.edu
Web: www.cs.cmu.edu/~colohan Phone: (412)268-4751

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