r180984 - in /branches/google/gcc-4_6/gcc: Chan...

[delesley@gcc.gnu.org]

Author: delesley
Date: Fri Nov  4 21:30:43 2011
New Revision: 180984

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180984
Log:
This patch fixes an ICE caused when the ipa-sra optimization deletes
function arguments that are referenced from within a thread safety
attribute.  It will attempt to detect this situation and recover
gracefully.  Since a graceful recovery is not always possible, an
optional warning (-Wwarn-thread-optimization) can be turned on to
inform the user that certain attributes have been removed by
optimization.


Modified:
    branches/google/gcc-4_6/gcc/ChangeLog.google-4_6
    branches/google/gcc-4_6/gcc/common.opt
    branches/google/gcc-4_6/gcc/testsuite/ChangeLog.google-4_6
    branches/google/gcc-4_6/gcc/testsuite/g++.dg/thread-ann/thread_annot_lock-82.C
    branches/google/gcc-4_6/gcc/tree-threadsafe-analyze.c