* expression.cc (Expression::Expression_eval_info): Add
result_alignment_pointer field.
(Expression::eval_with_dot): Add result_alignment_pointer
parameter. Change all callers.
(Expression::eval_maybe_dot): Likewise.
(class Binary_expression): Add alignment_pointer parameter to
left_value and right_value. Change all callers.
(BINARY_EXPRESSION): Set result alignment.
(class Trinary_expression): Add alignment_pointer parameter to
arg2_value and arg3_value. Change all callers.
(Trinary_cond::value): Set result alignment.
(Max_expression::value, Min_expression::value): Likewise.
(Align_expression::value): Likewise.
* script-sections.cc (class Sections_element): Add dot_alignment
parameter to set_section_addresses virtual function. Update
instantiations.
(class Output_section_element): Likewise.
(Script_sections::create_segments): Add dot_alignment parameter.
Change all callers.
(Script_sections::create_segments_from_phdrs_clause): Likewise.
(Script_sections::set_phdrs_clause_addresses): Likewise.
* script-sections.h: Update declarations.
* script.h: Update declarations.
* output.h (Output_segment::set_minimum_p_align): Don't decrease
min_p_align.
* testsuite/script_test_3.t: Set large alignment.
* testsuite/script_test_3.sh: Make sure that at least one LOAD
segment has expected alignment.