PR 33870
* tree.h (struct tree_struct_field_tag): Add field in_nested_struct.
(SFT_IN_NESTED_STRUCT): Define.
* tree-dfa.c (dump_subvars_for): Show offset of each
sub-var.
* tree-flow.h (struct fieldoff): Add field in_nested_struct.
* tree-ssa-structalias.c (struct variable_info): Likewise.
(push_fields_onto_fieldstack): If OFFSET is positive,
set in_nested_struct.
(create_variable_info_for): Copy setting of
in_nested_struct from the field offset object.
(set_uids_in_ptset): Set SFT_IN_NESTED_STRUCT from the
variable info object.
* tree-ssa-operands.c (add_vars_for_offset): If VAR
belongs to a nested structure, adjust OFFSET by
SFT_OFFSET(VAR).
testsuite/ChangeLog
* gcc.c-torture/execute/pr33870.x: Remove.
From-SVN: r129976
