http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52395
--- Comment #8 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-27 13:09:12 UTC --- The main issue is, of course, that we re-write base of the LHS of the assignments at all. Index: gcc/tree-sra.c =================================================================== --- gcc/tree-sra.c (revision 184591) +++ gcc/tree-sra.c (working copy) @@ -1480,6 +1480,10 @@ build_ref_for_offset (location_t loc, tr gcc_checking_assert (offset % BITS_PER_UNIT == 0); + if (offset == 0 + && types_compatible_p (exp_type, TREE_TYPE (base))) + return unshare_expr (base); + base = get_addr_base_and_unit_offset (base, &base_offset); /* get_addr_base_and_unit_offset returns NULL for references with a variable or, instead of re-writing *__x_1(D) = D.2219; to __x_1(D)->re = SR.1_11; __x_1(D)->im = SR.2_10; re-write it to SR.3_12 = COMPLEX_EXPR <SR.1_11, SR.2_12>; *__x_1(D) = SR.3_12; to avoid touching the non-replaced LHS.
