New compiler crash for PR8361

[Andrew Pinski]

On Thursday, Jul 17, 2003, at 08:17 US/Eastern, Gerald Pfeifer wrote:

> Normally I'd just file a PR, but PR8361 has a critical example for
> compile-time performance problems, and since <24 hours (I believe)
> mainline now crashes while compiling it with -O3.

In fact there is already a PR for this, PR11545.
Bug 8361 is already depends on it in bugzilla.
 From bug 11545:
Really from bug 11592:
Doing a regression search, it looks like this problem first appeared
after the big change on Jul 11 from Geoffrey Keating  
<geoffk@apple.com>:

2003-07-11  Geoffrey Keating  <geoffk@apple.com>

	* c-decl.c (finish_decl): Handle 'used' here...
	* cgraphunit.c (cgraph_finalize_function): ... and here ...
	* c-common.c: (handle_used_attribute): ... not here.
         ...
         ...

In particular, i found that if i reverted his change to
cgraph.h:

	* cgraph.h (struct cgraph_node): Add chain_next and chain_prev GTY
	options.

then the crash went away.

A simple include of iostream causes this segfault (you have to use 
"--param ggc-min-
expand=0 --param ggc-min-heapsize=0" which forces gc to happen always).

Thanks,
Andrew Pinski