59 lines
2.1 KiB
LLVM
59 lines
2.1 KiB
LLVM
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@gbl_values = global [9 x i64] [ i64 12, i64 1, i64 33, i64 4, i64 1, i64 2, i64 1, i64 59, i64 4 ]
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@gbl_weights = global [9 x i64] [ i64 2, i64 10, i64 34, i64 9, i64 20, i64 26, i64 14, i64 5, i64 4 ]
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define i64 @max(i64 %item1, i64 %item2) {
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%one_bigger = icmp sge i64 %item1, %item2
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br i1 %one_bigger, label %ret_item_one, label %ret_item_two
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ret_item_one:
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ret i64 %item1
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ret_item_two:
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ret i64 %item2
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}
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define i64 @knapsack([9 x i64]* %value_arr, [9 x i64]* %weight_arr, i64 %current_item_index, i64 %remaining_weight) {
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%full = icmp eq i64 0, %remaining_weight
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%no_items = icmp slt i64 %current_item_index, 0
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%full_or_no_items = or i1 %full, %no_items
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br i1 %full_or_no_items, label %no_more_space, label %check_weight_neg
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check_weight_neg:
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%done = icmp slt i64 %remaining_weight, 0
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br i1 %done, label %no_more_weight, label %continue
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no_more_space:
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ret i64 0
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no_more_weight:
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ret i64 -99999999
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continue:
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%new_index = add i64 -1, %current_item_index
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%value_array_i_ptr = getelementptr [9 x i64], [9 x i64]* %value_arr, i32 0, i64 %current_item_index
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%value_array_i_value = load i64, i64* %value_array_i_ptr
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%weight_array_i_ptr = getelementptr [9 x i64], [9 x i64]* %weight_arr, i32 0, i64 %current_item_index
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%weight_array_i_value = load i64, i64* %weight_array_i_ptr
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%sub_ready_weight_value = mul i64 -1, %weight_array_i_value
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%inlcude_weight_limit = add i64 %sub_ready_weight_value, %remaining_weight
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%include_item_rec_subsolution = call i64 @knapsack([9 x i64]* %value_arr, [9 x i64]* %weight_arr, i64 %new_index, i64 %inlcude_weight_limit)
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%include_item_solution = add i64 %value_array_i_value, %include_item_rec_subsolution
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%exclude_item_solution = call i64 @knapsack([9 x i64]* %value_arr, [9 x i64]* %weight_arr, i64 %new_index, i64 %remaining_weight)
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%best_option = call i64 @max(i64 %include_item_solution, i64 %exclude_item_solution)
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ret i64 %best_option
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}
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define i64 @main(i64 %argc, i8** %arcv) {
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%out = call i64 @knapsack([9 x i64]* @gbl_values, [9 x i64]* @gbl_weights, i64 8, i64 30)
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ret i64 %out
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}
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