Re: egcs-19980508 powerpc-ibm-aix4.1.4.0 results (failures with -p/-pg)

[David Edelsohn <dje at watson dot ibm dot com>]

>>>>> "Kaveh R Ghazi" writes:

Kaveh> That problem was failures in the testsuite when running -p/-pg on code
Kaveh> which calls nested functions. 

Kaveh> Eg: execute/{931002-1.c,921017-1.c,920612-2.c,920501-7.c,920428-2.c}

	Yes.  Mike thought that the backchain might have been the
problem.  When I last looked something about nested functions and
profiling was causing the programs to wander into oblivion during the
nested function.

	I think the problem is a poor interaction between the way AIX
generates profiling statistics and GCC's implementation of nested
functions.  Something is wrong with the GCC-generated calling convention
for nested functions or AIX is making some unsafe assuption about the
stack.  The AIX profiling code goes poking around to find the function
address, updates a counter, and writes some information.  In the case of
nested functions, something goes wrong.  I have not had time to step
through this code enough to find out what really is going wrong. 

David