Summary: Remove explicit GC flags in regression tests
Reviewed-by: never, ysr

Summary: Move instance store's memory users to corresponding memory slices when updating its memory edge.
Reviewed-by: never

Summary: Add missing checks for MemBar nodes in EA.
Reviewed-by: never

6875866: Intrinsic for String.indexOf() is broken on x86 with SSE4.2
Summary: Modify String intrinsic methods to pass char[] pointers instead of string oops.
Reviewed-by: never

Summary: delay dead code elimination in set_req_X to make it safe
Reviewed-by: kvn, never

Summary: The C2 compiler leads to wrong results on solaris-i486 (32-bit) for a testcase given in the CR.
Reviewed-by: never, rasbold

Reviewed-by: kvn, jrose