[Bug tree-optimization/42508] New: wrong code with "-O1 -fipa-sra"

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

+++ This bug was initially created as a clone of Bug #42290 +++

Command line:
g++ -O1 -fipa-sra testcase.cpp && ./a.out
(-Wall shows valid (but misleading?) warnings as described in bug 42290)

Tested versions:
r155434 - broken
r154886 - broken
r154830 - OK
r153685 - OK

Output:
g++ -O1 -fipa-sra testcase.cpp && ./a.out
2
-1419800576

Expected output:
g++ -O1 -fipa-sra testcase.cpp && ./a.out
2
1


-- 
           Summary: wrong code with "-O1 -fipa-sra"
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42508