[PATCH]: Fix IPA with profiling

[Uros Bizjak <ubizjak at gmail dot com>]

Hello!

Attached patch partially reverts r187375 [1]. Apparently, the patch
added some new functionality to symtab_remove_unreachable_nodes,
although the ChangeLog said:

Log:
	...
	(symtab_remove_unreachable_nodes): Cleanup.

It looks to me that since we changed something, we also have to update
something, at least when profiling, before calling
cgraph_propagate_frequency.

2012-07-04  Uros Bizjak  <ubizjak@gmail.com>

	* ipa.c (symtab_remove_unreachable_nodes): Partially revert r187375
	to not call cgraph_propagate_frequency if something was changed.

testsuite/ChangLog:

2012-07-04  Uros Bizjak  <ubizjak@gmail.com>

	* g++.dg/torture/pr53321.C: New test.

Bootstrapped and regression tested on x86_64-pc-linux-gnu {,-m32},
also with profiled LTO bootstrap.

OK for mainline?

[1] http://gcc.gnu.org/ml/gcc-cvs/2012-05/msg00371.html

Uros.

Attachment: p.diff.txt
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