(copy_for_inline, case LABEL_REF): Properly copy LABEL_REF
with LABEL_REF_NONLOCAL_P set.
Copy LABEL_OUTSIDE_LOOP_P flag.
(copy_rtx_and_substitute, case LABEL_REF): Likewise.
(copy_rtx_and_substitute, case CONST): Make recursive call for a LABEL_REF in
the constant pool.

From-SVN: r5034