[PATCH, testsuite] Fix for PR49519, miscompiled 447.dealII in SPEC CPU 2006

[Kirill Yukhin <kirill dot yukhin at gmail dot com>]

Hi,
I've prepared a patch for: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49519

I've also prepared a test which reproduces the error.

ChangeLog entry:
2011-07-06  Kirill Yukhin  <kirill.yukhin@intel.com>

        PR tailcall-optimization/49519
        * calls.c (mem_overlaps_already_clobbered_arg_p): Additional
        check if address is stored in register. If so - give up.

        (check_sibcall_argument_overlap_1): Do not perform check of
        overlapping when it is call to address.

tessuite/ChangeLog entry:
2011-07-06  Kirill Yukhin  <kirill.yukhin@intel.com>

        * g++.dg/torture/pr49519.C: New test for tailcall fix.

Bootstrapped, new test fails without patch, passes when it is applied.
This fixes the bprblem with SPEC2006/447.dealII miscompile

Ok for trunk?

Thanks, K

Attachment: pr49519.gcc.patch
Description: Binary data