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Re: egcs 1.0.1 miscompiles Linux 2.0.33
- To: law at cygnus dot com
- Subject: Re: egcs 1.0.1 miscompiles Linux 2.0.33
- From: John Carr <jfc at mit dot edu>
- Date: Sun, 01 Mar 1998 16:55:33 -0500
- cc: Gabriel Paubert <paubert at iram dot es>, Linus Torvalds <torvalds at transmeta dot com>, linux-kernel at vger dot rutgers dot edu, egcs at cygnus dot com
I think this is beyond the limits of what can or should be done with gcc's
inline assembly. strstr is a volatile asm which needs 18 instructions, 5
registers, and takes a long time to run. I've seen cases like this where
the separate function is faster than the inlined version because of reduced
register pressure in the caller.