void test_reload_insn_is_inserted_at_the_beginning_of_the_interval_if_necessary(void) { struct compilation_unit *cu; struct insn *insn_array[2]; struct var_info *r1, *r2; struct basic_block *bb; struct insn *insn; cu = compilation_unit_alloc(&method); r1 = get_var(cu, J_INT); r2 = get_var(cu, J_INT); insn_array[0] = arithmetic_insn(INSN_ADD, r1, r1, r1); insn_array[1] = arithmetic_insn(INSN_ADD, r2, r2, r2); bb = get_basic_block(cu, 0, 2); bb_add_insn(bb, insn_array[0]); bb_add_insn(bb, insn_array[1]); r1->interval->spill_reload_reg.interval = r1->interval; r2->interval->spill_reload_reg.interval = r2->interval; r2->interval->flags |= INTERVAL_FLAG_NEED_RELOAD; r2->interval->spill_parent = r1->interval; compute_insn_positions(cu); analyze_liveness(cu); insert_spill_reload_insns(cu); /* * A reload instruction is inserted at the beginning. */ insn = list_first_entry(&bb->insn_list, struct insn, insn_list_node); assert_ld_insn(INSN_LD_LOCAL, r2->interval->reg, r1->interval->spill_slot, insn); /* * Second instruction stays the same. */ insn = list_next_entry(&insn->insn_list_node, struct insn, insn_list_node); assert_ptr_equals(insn_array[0], insn); /* * Last instruction stays the same. */ insn = list_next_entry(&insn->insn_list_node, struct insn, insn_list_node); assert_ptr_equals(insn_array[1], insn); free_compilation_unit(cu); }
void test_spill_insn_is_inserted_at_the_end_of_the_interval_if_necessary(void) { struct compilation_unit *cu; struct insn *insn_array[2]; struct var_info *r1, *r2; struct basic_block *bb; struct insn *insn; cu = compilation_unit_alloc(&method); r1 = get_var(cu); r2 = get_var(cu); insn_array[0] = arithmetic_insn(INSN_ADD, r1, r1, r1); insn_array[1] = arithmetic_insn(INSN_ADD, r2, r2, r2); bb = get_basic_block(cu, 0, 2); bb_add_insn(bb, insn_array[0]); bb_add_insn(bb, insn_array[1]); r1->interval->need_spill = true; compute_insn_positions(cu); analyze_liveness(cu); insert_spill_reload_insns(cu); /* * First instruction stays the same. */ insn = list_first_entry(&bb->insn_list, struct insn, insn_list_node); assert_ptr_equals(insn_array[0], insn); /* * Last instruction stays the same. */ insn = list_next_entry(&insn->insn_list_node, struct insn, insn_list_node); assert_ptr_equals(insn_array[1], insn); /* * A spill instruction is inserted after the interval end. */ insn = list_next_entry(&insn->insn_list_node, struct insn, insn_list_node); assert_st_insn(INSN_ST_LOCAL, r1->interval->spill_slot, r1->interval->reg, insn); free_compilation_unit(cu); }
void test_variable_range_spans_two_basic_blocks(void) { struct basic_block *bb1, *bb2; struct compilation_unit *cu; struct var_info *r1, *r2; struct insn *insn[4]; cu = compilation_unit_alloc(&method); r1 = get_var(cu); r2 = get_var(cu); bb1 = get_basic_block(cu, 0, 2); bb2 = get_basic_block(cu, 2, 4); bb_add_successor(bb1, bb2); insn[2] = imm_insn(INSN_SETL, 0x02, r2); bb_add_insn(bb2, insn[2]); insn[3] = arithmetic_insn(INSN_ADD, r1, r2, r2); bb_add_insn(bb2, insn[3]); insn[0] = imm_insn(INSN_SETL, 0x01, r1); bb_add_insn(bb1, insn[0]); insn[1] = branch_insn(INSN_JMP, bb2); bb_add_insn(bb1, insn[1]); compute_insn_positions(cu); analyze_liveness(cu); assert_defines(bb1, r1); assert_defines(bb2, r2); assert_uses(bb2, r1); assert_live_range(r1->interval, 0, 4); assert_live_range(r2->interval, 2, 4); assert_ptr_equals(insn[0], r1->interval->insn_array[0]); assert_ptr_equals(insn[1], r1->interval->insn_array[1]); assert_ptr_equals(insn[2], r1->interval->insn_array[2]); assert_ptr_equals(insn[3], r1->interval->insn_array[3]); assert_ptr_equals(insn[2], r2->interval->insn_array[0]); assert_ptr_equals(insn[3], r2->interval->insn_array[1]); free_compilation_unit(cu); }
void test_variable_range_limited_to_basic_block(void) { struct compilation_unit *cu; struct var_info *r1, *r2; struct basic_block *bb; struct insn *insn[3]; cu = compilation_unit_alloc(&method); r1 = get_var(cu); r2 = get_var(cu); bb = get_basic_block(cu, 0, 3); insn[0] = imm_insn(INSN_SETL, 0x01, r1); bb_add_insn(bb, insn[0]); insn[1] = imm_insn(INSN_SETL, 0x02, r2); bb_add_insn(bb, insn[1]); insn[2] = arithmetic_insn(INSN_ADD, r1, r2, r2); bb_add_insn(bb, insn[2]); compute_insn_positions(cu); analyze_liveness(cu); assert_defines(bb, r1); assert_defines(bb, r2); assert_live_range(r1->interval, 0, 3); assert_live_range(r2->interval, 1, 3); assert_ptr_equals(insn[0], r1->interval->insn_array[0]); assert_ptr_equals(insn[1], r1->interval->insn_array[1]); assert_ptr_equals(insn[2], r1->interval->insn_array[2]); assert_ptr_equals(insn[1], r2->interval->insn_array[0]); assert_ptr_equals(insn[2], r2->interval->insn_array[1]); free_compilation_unit(cu); }