[Bug ipa/61160] New: [4.9/4.10 Regression] wrong code with -O3 (or ICE: verify_cgraph_node failed: edge points to wrong declaration)

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61160

            Bug ID: 61160
           Summary: [4.9/4.10 Regression] wrong code with -O3 (or ICE:
                    verify_cgraph_node failed: edge points to wrong
                    declaration)
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 32785
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32785&action=edit
reduced testcase (from g++.old-deja/g++.jason/thunk1.C)

Output:
$ g++ -O3 testcase.C
$ valgrind ./a.out
==21283== Invalid read of size 8
==21283==    at 0x400740: CExample::MixinFunc(int, A) [clone .constprop.0]
(testcase.C:3)
==21283==    by 0x40062A: main (testcase.C:27)
==21283==  Address 0x1 is not stack'd, malloc'd or (recently) free'd

Tested revisions:
r210308 - fail
4.9 r210307 - fail
4.8 r210303 - OK