PR tree-optimization/41783
* tree-data-ref.c (toplevel): Include flags.h.
(dump_data_dependence_relation): Also dump the inputs if the
result will be unknown.
(split_constant_offset_1): Look through some conversions.
* tree-predcom.c (determine_roots_comp): Restart a new chain if
the offset from last element is too large.
(ref_at_iteration): Deal also with MISALIGNED_INDIRECT_REF.
(reassociate_to_the_same_stmt): Handle vector registers.
* tree-vect-data-refs.c (vect_equal_offsets): Handle unary operations
(e.g. conversions).
* tree-vect-loop-manip.c (vect_gen_niters_for_prolog_loop): Add
wide_prolog_niters argument, emit widening instructions.
(vect_do_peeling_for_alignment): Adjust caller, use widened
variant of the iteration cound.
* Makefile.in (tree-data-ref.o): Add $(FLAGS_H).
testsuite/
* gfortran.dg/vect/fast-math-mgrid-resid.f: New.
From-SVN: r156043
