sdo@PURDUE.EDU.UUCP (12/04/87)
It has recently been discovered that the Sun Optimizing compiler has
trouble generating code in the presence of the asm("...") statements
of the disable() and restore() macros. This bug results in register
variables being overwritten in certain cases. One of the places where
this occurs is in the sleep10() routine, which has the side effect of
setting register d7 to 1. Cc uses registers d7-d2 for register
variables, when requested, in that order.
Until I hear back from Sun, I would recommend that the system be
compiled WITHOUT the -O (optimizer) option.
Shawn Ostermann
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Shawn Ostermann ARPA: sdo@gwen.cs.purdue.edu
UUCP: ...!purdue!sdo
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