Problem 208

Robot Walks: closed paths of 70 five-degree arcs.

View problem on Project Euler

Performance comparison

Flow source

# Project Euler 208
# Robot Walks: closed paths of 70 five-degree arcs.

extern {
    function calloc(n: i64, size: i64) -> ptr<void>
    function free(p: ptr<void>) -> void
}

let mut NUM_VISITED: ptr<i32> = null
let mut MAX_PER: i32 = 0
let mut CACHE: ptr<i64> = null
const UNKNOWN: i64 = 0 - 1

function search(arcs_left: i32, current_arc: i32) -> i64 {
    if arcs_left == 0 {
        if current_arc != 0 { return 0 }
        if NUM_VISITED[0] != NUM_VISITED[1] { return 0 }
        if NUM_VISITED[2] != NUM_VISITED[3] { return 0 }
        if NUM_VISITED[0] != NUM_VISITED[2] { return 0 }
        return 1
    }
    let idf: i64 = (MAX_PER + 1) as i64
    let mut key: i64 = current_arc as i64
    let mut i: i32 = 0
    while i < 5 {
        key = key * idf + (NUM_VISITED[i] as i64)
        i = i + 1
    }
    if CACHE[key] != UNKNOWN {
        return CACHE[key]
    }
    let mut result: i64 = 0
    let turn_left: i32 = (current_arc + 1) % 5
    if NUM_VISITED[turn_left] < MAX_PER {
        NUM_VISITED[turn_left] = NUM_VISITED[turn_left] + 1
        result = result + search(arcs_left - 1, turn_left)
        NUM_VISITED[turn_left] = NUM_VISITED[turn_left] - 1
    }
    let turn_right: i32 = (current_arc + 4) % 5
    if NUM_VISITED[turn_right] < MAX_PER {
        NUM_VISITED[turn_right] = NUM_VISITED[turn_right] + 1
        result = result + search(arcs_left - 1, turn_right)
        NUM_VISITED[turn_right] = NUM_VISITED[turn_right] - 1
    }
    CACHE[key] = result
    return result
}

function main() -> i32 {
    let num_arcs: i32 = 70
    MAX_PER = num_arcs / 5
    let mut size: i64 = 5
    let mut p: i32 = 0
    while p < 5 {
        size = size * ((MAX_PER + 1) as i64)
        p = p + 1
    }
    CACHE = calloc(size, 8)
    NUM_VISITED = calloc(5, 4)
    if CACHE == null || NUM_VISITED == null { return 1 }
    let mut i: i64 = 0
    while i < size {
        CACHE[i] = UNKNOWN
        i = i + 1
    }
    printf("%lld\n", search(num_arcs, 0))
    free(CACHE)
    free(NUM_VISITED)
    return 0
}

Generated C

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/* Flow runtime helpers */
typedef struct flow_temp_node { struct flow_temp_node* next; } flow_temp_node;
static flow_temp_node* flow_temp_head = NULL;
static int flow_temp_atexit_set = 0;
__attribute__((unused)) static void flow_temp_free_all(void) {
    while (flow_temp_head) {
        flow_temp_node* n = flow_temp_head;
        flow_temp_head = n->next;
        free(n);
    }
}
__attribute__((unused)) static void* flow_temp_alloc(size_t nbytes) {
    flow_temp_node* node = (flow_temp_node*)malloc(sizeof(flow_temp_node) + nbytes);
    if (!node) return NULL;
    node->next = flow_temp_head;
    flow_temp_head = node;
    if (!flow_temp_atexit_set) {
        flow_temp_atexit_set = 1;
        atexit(flow_temp_free_all);
    }
    return (void*)(node + 1);
}
#ifndef FLOW_DIAG
#define FLOW_DIAG(msg) fprintf(stderr, "%s", (msg))
#endif
#ifndef FLOW_LOG
#define FLOW_LOG(fmt, ...) printf(fmt, __VA_ARGS__)
#endif
#ifndef FLOW_LOG_EMPTY
#define FLOW_LOG_EMPTY(fmt) printf(fmt)
#endif
static char* flow_strcat(const char* a, const char* b) {
    size_t la = strlen(a ? a : ""), lb = strlen(b ? b : "");
    char* r = (char*)flow_temp_alloc(la + lb + 1);
    if (!r) return NULL;
    if (la) memcpy(r, a, la);
    if (lb) memcpy(r + la, b, lb);
    r[la + lb] = '\0';
    return r;
}

#define __flow_in_arr(arr, val) __extension__ ({ \
    int _found = 0; \
    size_t _n = sizeof(arr)/sizeof((arr)[0]); \
    for (size_t _i = 0; _i < _n; _i++) { \
        if ((arr)[_i] == (val)) { _found = 1; break; } \
    } _found; })

/* Unified fault handler (MISRA #279) — override with -DFLOW_FAULT_HANDLER=fn */
#ifndef FLOW_FAULT_HANDLER
__attribute__((unused)) static inline void flow_fault_handler(const char* msg) {
    fprintf(stderr, "flow: %s\n", msg ? msg : "fault");
    abort();
#if defined(__GNUC__) || defined(__clang__)
    __builtin_unreachable();
#endif
}
#else
#define flow_fault_handler FLOW_FAULT_HANDLER
#endif
#define flow_div_by_zero_handler() flow_fault_handler("division by zero")
#define flow_shift_ub_handler() flow_fault_handler("invalid shift (amount out of range or left-shift of negative)")

#ifndef FLOW_CHECKED_DIV
#define FLOW_CHECKED_DIV(L, R) (((R) != 0) ? ((L) / (R)) : (flow_div_by_zero_handler(), (L) * 0))
#endif
#ifndef FLOW_CHECKED_MOD
#define FLOW_CHECKED_MOD(L, R) (((R) != 0) ? ((L) % (R)) : (flow_div_by_zero_handler(), (L) * 0))
#endif
#ifndef FLOW_CHECKED_SHL
#define FLOW_CHECKED_SHL(L, R) ((((R) >= 0) && ((unsigned long long)(R) < (sizeof(L) * 8ull)) && ((L) >= 0)) ? ((L) << (R)) : (flow_shift_ub_handler(), (L) * 0))
#endif
#ifndef FLOW_CHECKED_SHR
#define FLOW_CHECKED_SHR(L, R) ((((R) >= 0) && ((unsigned long long)(R) < (sizeof(L) * 8ull))) ? ((L) >> (R)) : (flow_shift_ub_handler(), (L) * 0))
#endif

#include <math.h>

void* _ui_state = NULL;

static inline float i32_to_f32(int32_t v) { return (float)v; }

/* Host stub for @gpu kernels (device codegen replaces this). */
static inline int32_t gpu_thread_id(void) { return 0; }

int64_t search_i32_i32(int32_t arcs_left, int32_t current_arc);
int32_t main(void);

static const int64_t UNKNOWN = (0 - 1);

/* Module statics */
static int32_t* NUM_VISITED = NULL;
static int32_t MAX_PER = 0;
static int64_t* CACHE = NULL;



int64_t search_i32_i32(int32_t arcs_left, int32_t current_arc) {
    if (arcs_left == 0) {
        if (current_arc != 0) {
            return 0;
        }
        if (NUM_VISITED[0] != NUM_VISITED[1]) {
            return 0;
        }
        if (NUM_VISITED[2] != NUM_VISITED[3]) {
            return 0;
        }
        if (NUM_VISITED[0] != NUM_VISITED[2]) {
            return 0;
        }
        return 1;
    }
    int64_t idf = ((int64_t)((MAX_PER + 1)));
    int64_t key = ((int64_t)(current_arc));
    int32_t i = 0;
    while (i < 5) {
        key = ((key * idf) + ((int64_t)(NUM_VISITED[i])));
        i = (i + 1);
    }
    if (CACHE[key] != UNKNOWN) {
        return CACHE[key];
    }
    int64_t result = 0;
    int32_t turn_left = FLOW_CHECKED_MOD(((current_arc + 1)), (5));
    if (NUM_VISITED[turn_left] < MAX_PER) {
        NUM_VISITED[turn_left] = (NUM_VISITED[turn_left] + 1);
        result = (result + search_i32_i32((arcs_left - 1), turn_left));
        NUM_VISITED[turn_left] = (NUM_VISITED[turn_left] - 1);
    }
    int32_t turn_right = FLOW_CHECKED_MOD(((current_arc + 4)), (5));
    if (NUM_VISITED[turn_right] < MAX_PER) {
        NUM_VISITED[turn_right] = (NUM_VISITED[turn_right] + 1);
        result = (result + search_i32_i32((arcs_left - 1), turn_right));
        NUM_VISITED[turn_right] = (NUM_VISITED[turn_right] - 1);
    }
    CACHE[key] = result;
    return result;
}

int32_t main(void) {
    int32_t num_arcs = 70;
    MAX_PER = FLOW_CHECKED_DIV((num_arcs), (5));
    int64_t size = 5;
    int32_t p = 0;
    while (p < 5) {
        size = (size * ((int64_t)((MAX_PER + 1))));
        p = (p + 1);
    }
    CACHE = calloc(size, 8);
    NUM_VISITED = calloc(5, 4);
    if ((CACHE == NULL || NUM_VISITED == NULL)) {
        return 1;
    }
    int64_t i = 0;
    while (i < size) {
        CACHE[i] = UNKNOWN;
        i = (i + 1);
    }
    printf("%lld\n", search_i32_i32(num_arcs, 0));
    free(CACHE);
    free(NUM_VISITED);
    return 0;
}

Generated MLIR

module {
  llvm.func @printf(!llvm.ptr, ...) -> i32
  llvm.mlir.global internal constant @str_0("%lld\n\00") {addr_space = 0 : i32} : !llvm.array<6 x i8>
  func.func private @calloc(i64, i64) -> !llvm.ptr
  func.func private @free(!llvm.ptr) -> ()
  // Module static: NUM_VISITED
  llvm.mlir.global internal @NUM_VISITED() {addr_space = 0 : i32} : !llvm.ptr {
    %0 = llvm.mlir.zero : !llvm.ptr
    llvm.return %0 : !llvm.ptr
  }
  // Module static: MAX_PER
  llvm.mlir.global internal @MAX_PER(0 : i32) : i32
  // Module static: CACHE
  llvm.mlir.global internal @CACHE() {addr_space = 0 : i32} : !llvm.ptr {
    %1 = llvm.mlir.zero : !llvm.ptr
    llvm.return %1 : !llvm.ptr
  }
  // Constant: UNKNOWN
  llvm.mlir.global internal constant @UNKNOWN(-1 : i64) : i64
  func.func @search(%arg0: i32, %arg1: i32) -> i64 {
    %2 = arith.constant 0 : i32
    %3 = arith.cmpi eq, %arg0, %2 : i32
    cf.cond_br %3, ^bb0, ^bb1
    ^bb0:
      %4 = arith.constant 0 : i32
      %5 = arith.cmpi ne, %arg1, %4 : i32
      cf.cond_br %5, ^bb3, ^bb4
      ^bb3:
        %6 = arith.constant 0 : i32
        %7 = arith.extsi %6 : i32 to i64
        func.return %7 : i64
      ^bb4:
        cf.br ^bb5
      ^bb5:
      %9 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %10 = llvm.load %9 : !llvm.ptr -> !llvm.ptr
      %11 = arith.constant 0 : i32
      %12 = arith.extsi %11 : i32 to i64
      %13 = llvm.getelementptr %10[%12] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %8 = llvm.load %13 : !llvm.ptr -> i32
      %15 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %16 = llvm.load %15 : !llvm.ptr -> !llvm.ptr
      %17 = arith.constant 1 : i32
      %18 = arith.extsi %17 : i32 to i64
      %19 = llvm.getelementptr %16[%18] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %14 = llvm.load %19 : !llvm.ptr -> i32
      %20 = arith.cmpi ne, %8, %14 : i32
      cf.cond_br %20, ^bb6, ^bb7
      ^bb6:
        %21 = arith.constant 0 : i32
        %22 = arith.extsi %21 : i32 to i64
        func.return %22 : i64
      ^bb7:
        cf.br ^bb8
      ^bb8:
      %24 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %25 = llvm.load %24 : !llvm.ptr -> !llvm.ptr
      %26 = arith.constant 2 : i32
      %27 = arith.extsi %26 : i32 to i64
      %28 = llvm.getelementptr %25[%27] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %23 = llvm.load %28 : !llvm.ptr -> i32
      %30 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %31 = llvm.load %30 : !llvm.ptr -> !llvm.ptr
      %32 = arith.constant 3 : i32
      %33 = arith.extsi %32 : i32 to i64
      %34 = llvm.getelementptr %31[%33] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %29 = llvm.load %34 : !llvm.ptr -> i32
      %35 = arith.cmpi ne, %23, %29 : i32
      cf.cond_br %35, ^bb9, ^bb10
      ^bb9:
        %36 = arith.constant 0 : i32
        %37 = arith.extsi %36 : i32 to i64
        func.return %37 : i64
      ^bb10:
        cf.br ^bb11
      ^bb11:
      %39 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %40 = llvm.load %39 : !llvm.ptr -> !llvm.ptr
      %41 = arith.constant 0 : i32
      %42 = arith.extsi %41 : i32 to i64
      %43 = llvm.getelementptr %40[%42] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %38 = llvm.load %43 : !llvm.ptr -> i32
      %45 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %46 = llvm.load %45 : !llvm.ptr -> !llvm.ptr
      %47 = arith.constant 2 : i32
      %48 = arith.extsi %47 : i32 to i64
      %49 = llvm.getelementptr %46[%48] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %44 = llvm.load %49 : !llvm.ptr -> i32
      %50 = arith.cmpi ne, %38, %44 : i32
      cf.cond_br %50, ^bb12, ^bb13
      ^bb12:
        %51 = arith.constant 0 : i32
        %52 = arith.extsi %51 : i32 to i64
        func.return %52 : i64
      ^bb13:
        cf.br ^bb14
      ^bb14:
      %53 = arith.constant 1 : i32
      %54 = arith.extsi %53 : i32 to i64
      func.return %54 : i64
    ^bb1:
      cf.br ^bb2
    ^bb2:
    %55 = llvm.mlir.addressof @MAX_PER : !llvm.ptr
    %56 = llvm.load %55 : !llvm.ptr -> i32
    %57 = arith.constant 1 : i32
    %58 = arith.addi %56, %57 : i32
    %59 = arith.extsi %58 : i32 to i64
    %60 = arith.extsi %arg1 : i32 to i64
    %61 = llvm.mlir.constant(1 : i64) : i64
    %62 = llvm.alloca %61 x i64 : (i64) -> !llvm.ptr
    llvm.store %60, %62 : i64, !llvm.ptr
    %63 = arith.constant 0 : i32
    %64 = llvm.mlir.constant(1 : i64) : i64
    %65 = llvm.alloca %64 x i32 : (i64) -> !llvm.ptr
    llvm.store %63, %65 : i32, !llvm.ptr
    cf.br ^bb15
    ^bb15:
    %66 = llvm.load %65 : !llvm.ptr -> i32
    %67 = arith.constant 5 : i32
    %68 = arith.cmpi slt, %66, %67 : i32
    cf.cond_br %68, ^bb16, ^bb17
    ^bb16:
      %69 = llvm.load %62 : !llvm.ptr -> i64
      %70 = arith.muli %69, %59 : i64
      %72 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %73 = llvm.load %72 : !llvm.ptr -> !llvm.ptr
      %74 = llvm.load %65 : !llvm.ptr -> i32
      %75 = arith.extsi %74 : i32 to i64
      %76 = llvm.getelementptr %73[%75] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %71 = llvm.load %76 : !llvm.ptr -> i32
      %77 = arith.extsi %71 : i32 to i64
      %78 = arith.addi %70, %77 : i64
      llvm.store %78, %62 : i64, !llvm.ptr
      %79 = llvm.load %65 : !llvm.ptr -> i32
      %80 = arith.constant 1 : i32
      %81 = arith.addi %79, %80 : i32
      llvm.store %81, %65 : i32, !llvm.ptr
      cf.br ^bb15
    ^bb17:
    %83 = llvm.mlir.addressof @CACHE : !llvm.ptr
    %84 = llvm.load %83 : !llvm.ptr -> !llvm.ptr
    %85 = llvm.load %62 : !llvm.ptr -> i64
    %86 = llvm.getelementptr %84[%85] : (!llvm.ptr, i64) -> !llvm.ptr, i64
    %82 = llvm.load %86 : !llvm.ptr -> i64
    %87 = llvm.mlir.addressof @UNKNOWN : !llvm.ptr
    %88 = llvm.load %87 : !llvm.ptr -> i64
    %89 = arith.cmpi ne, %82, %88 : i64
    cf.cond_br %89, ^bb18, ^bb19
    ^bb18:
      %91 = llvm.mlir.addressof @CACHE : !llvm.ptr
      %92 = llvm.load %91 : !llvm.ptr -> !llvm.ptr
      %93 = llvm.load %62 : !llvm.ptr -> i64
      %94 = llvm.getelementptr %92[%93] : (!llvm.ptr, i64) -> !llvm.ptr, i64
      %90 = llvm.load %94 : !llvm.ptr -> i64
      func.return %90 : i64
    ^bb19:
      cf.br ^bb20
    ^bb20:
    %95 = arith.constant 0 : i32
    %96 = arith.extsi %95 : i32 to i64
    %97 = llvm.mlir.constant(1 : i64) : i64
    %98 = llvm.alloca %97 x i64 : (i64) -> !llvm.ptr
    llvm.store %96, %98 : i64, !llvm.ptr
    %99 = arith.constant 1 : i32
    %100 = arith.addi %arg1, %99 : i32
    %101 = arith.constant 5 : i32
    %102 = arith.remsi %100, %101 : i32
    %104 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
    %105 = llvm.load %104 : !llvm.ptr -> !llvm.ptr
    %106 = arith.extsi %102 : i32 to i64
    %107 = llvm.getelementptr %105[%106] : (!llvm.ptr, i64) -> !llvm.ptr, i32
    %103 = llvm.load %107 : !llvm.ptr -> i32
    %108 = llvm.mlir.addressof @MAX_PER : !llvm.ptr
    %109 = llvm.load %108 : !llvm.ptr -> i32
    %110 = arith.cmpi slt, %103, %109 : i32
    cf.cond_br %110, ^bb21, ^bb22
    ^bb21:
      %112 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %113 = llvm.load %112 : !llvm.ptr -> !llvm.ptr
      %114 = arith.extsi %102 : i32 to i64
      %115 = llvm.getelementptr %113[%114] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %111 = llvm.load %115 : !llvm.ptr -> i32
      %116 = arith.constant 1 : i32
      %117 = arith.addi %111, %116 : i32
      %118 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %119 = llvm.load %118 : !llvm.ptr -> !llvm.ptr
      %120 = arith.extsi %102 : i32 to i64
      %121 = llvm.getelementptr %119[%120] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      llvm.store %117, %121 : i32, !llvm.ptr
      %122 = llvm.load %98 : !llvm.ptr -> i64
      %124 = arith.constant 1 : i32
      %125 = arith.subi %arg0, %124 : i32
      %123 = func.call @search(%125, %102) : (i32, i32) -> i64
      %126 = arith.addi %122, %123 : i64
      llvm.store %126, %98 : i64, !llvm.ptr
      %128 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %129 = llvm.load %128 : !llvm.ptr -> !llvm.ptr
      %130 = arith.extsi %102 : i32 to i64
      %131 = llvm.getelementptr %129[%130] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %127 = llvm.load %131 : !llvm.ptr -> i32
      %132 = arith.constant 1 : i32
      %133 = arith.subi %127, %132 : i32
      %134 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %135 = llvm.load %134 : !llvm.ptr -> !llvm.ptr
      %136 = arith.extsi %102 : i32 to i64
      %137 = llvm.getelementptr %135[%136] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      llvm.store %133, %137 : i32, !llvm.ptr
      cf.br ^bb23
    ^bb22:
      cf.br ^bb23
    ^bb23:
    %138 = arith.constant 4 : i32
    %139 = arith.addi %arg1, %138 : i32
    %140 = arith.constant 5 : i32
    %141 = arith.remsi %139, %140 : i32
    %143 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
    %144 = llvm.load %143 : !llvm.ptr -> !llvm.ptr
    %145 = arith.extsi %141 : i32 to i64
    %146 = llvm.getelementptr %144[%145] : (!llvm.ptr, i64) -> !llvm.ptr, i32
    %142 = llvm.load %146 : !llvm.ptr -> i32
    %147 = llvm.mlir.addressof @MAX_PER : !llvm.ptr
    %148 = llvm.load %147 : !llvm.ptr -> i32
    %149 = arith.cmpi slt, %142, %148 : i32
    cf.cond_br %149, ^bb24, ^bb25
    ^bb24:
      %151 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %152 = llvm.load %151 : !llvm.ptr -> !llvm.ptr
      %153 = arith.extsi %141 : i32 to i64
      %154 = llvm.getelementptr %152[%153] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %150 = llvm.load %154 : !llvm.ptr -> i32
      %155 = arith.constant 1 : i32
      %156 = arith.addi %150, %155 : i32
      %157 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %158 = llvm.load %157 : !llvm.ptr -> !llvm.ptr
      %159 = arith.extsi %141 : i32 to i64
      %160 = llvm.getelementptr %158[%159] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      llvm.store %156, %160 : i32, !llvm.ptr
      %161 = llvm.load %98 : !llvm.ptr -> i64
      %163 = arith.constant 1 : i32
      %164 = arith.subi %arg0, %163 : i32
      %162 = func.call @search(%164, %141) : (i32, i32) -> i64
      %165 = arith.addi %161, %162 : i64
      llvm.store %165, %98 : i64, !llvm.ptr
      %167 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %168 = llvm.load %167 : !llvm.ptr -> !llvm.ptr
      %169 = arith.extsi %141 : i32 to i64
      %170 = llvm.getelementptr %168[%169] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      %166 = llvm.load %170 : !llvm.ptr -> i32
      %171 = arith.constant 1 : i32
      %172 = arith.subi %166, %171 : i32
      %173 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %174 = llvm.load %173 : !llvm.ptr -> !llvm.ptr
      %175 = arith.extsi %141 : i32 to i64
      %176 = llvm.getelementptr %174[%175] : (!llvm.ptr, i64) -> !llvm.ptr, i32
      llvm.store %172, %176 : i32, !llvm.ptr
      cf.br ^bb26
    ^bb25:
      cf.br ^bb26
    ^bb26:
    %177 = llvm.load %98 : !llvm.ptr -> i64
    %178 = llvm.mlir.addressof @CACHE : !llvm.ptr
    %179 = llvm.load %178 : !llvm.ptr -> !llvm.ptr
    %180 = llvm.load %62 : !llvm.ptr -> i64
    %181 = llvm.getelementptr %179[%180] : (!llvm.ptr, i64) -> !llvm.ptr, i64
    llvm.store %177, %181 : i64, !llvm.ptr
    %182 = llvm.load %98 : !llvm.ptr -> i64
    func.return %182 : i64
  }
  func.func @main() -> i32 {
    %183 = arith.constant 70 : i32
    %184 = arith.constant 5 : i32
    %185 = arith.divsi %183, %184 : i32
    %186 = llvm.mlir.addressof @MAX_PER : !llvm.ptr
    llvm.store %185, %186 : i32, !llvm.ptr
    %187 = arith.constant 5 : i32
    %188 = arith.extsi %187 : i32 to i64
    %189 = llvm.mlir.constant(1 : i64) : i64
    %190 = llvm.alloca %189 x i64 : (i64) -> !llvm.ptr
    llvm.store %188, %190 : i64, !llvm.ptr
    %191 = arith.constant 0 : i32
    %192 = llvm.mlir.constant(1 : i64) : i64
    %193 = llvm.alloca %192 x i32 : (i64) -> !llvm.ptr
    llvm.store %191, %193 : i32, !llvm.ptr
    cf.br ^bb27
    ^bb27:
    %194 = llvm.load %193 : !llvm.ptr -> i32
    %195 = arith.constant 5 : i32
    %196 = arith.cmpi slt, %194, %195 : i32
    cf.cond_br %196, ^bb28, ^bb29
    ^bb28:
      %197 = llvm.load %190 : !llvm.ptr -> i64
      %198 = llvm.mlir.addressof @MAX_PER : !llvm.ptr
      %199 = llvm.load %198 : !llvm.ptr -> i32
      %200 = arith.constant 1 : i32
      %201 = arith.addi %199, %200 : i32
      %202 = arith.extsi %201 : i32 to i64
      %203 = arith.muli %197, %202 : i64
      llvm.store %203, %190 : i64, !llvm.ptr
      %204 = llvm.load %193 : !llvm.ptr -> i32
      %205 = arith.constant 1 : i32
      %206 = arith.addi %204, %205 : i32
      llvm.store %206, %193 : i32, !llvm.ptr
      cf.br ^bb27
    ^bb29:
    %208 = llvm.load %190 : !llvm.ptr -> i64
    %209 = arith.constant 8 : i32
    %210 = arith.extsi %209 : i32 to i64
    %207 = func.call @calloc(%208, %210) : (i64, i64) -> !llvm.ptr
    %211 = llvm.mlir.addressof @CACHE : !llvm.ptr
    llvm.store %207, %211 : !llvm.ptr, !llvm.ptr
    %213 = arith.constant 5 : i32
    %214 = arith.constant 4 : i32
    %215 = arith.extsi %213 : i32 to i64
    %216 = arith.extsi %214 : i32 to i64
    %212 = func.call @calloc(%215, %216) : (i64, i64) -> !llvm.ptr
    %217 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
    llvm.store %212, %217 : !llvm.ptr, !llvm.ptr
    %218 = llvm.mlir.addressof @CACHE : !llvm.ptr
    %219 = llvm.load %218 : !llvm.ptr -> !llvm.ptr
    %220 = llvm.mlir.zero : !llvm.ptr
    %221 = llvm.icmp "eq" %219, %220 : !llvm.ptr
    %222 = scf.if %221 -> (i1) {
      %223 = arith.constant true
      scf.yield %223 : i1
    } else {
      %224 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
      %225 = llvm.load %224 : !llvm.ptr -> !llvm.ptr
      %226 = llvm.mlir.zero : !llvm.ptr
      %227 = llvm.icmp "eq" %225, %226 : !llvm.ptr
      scf.yield %227 : i1
    }
    cf.cond_br %222, ^bb30, ^bb31
    ^bb30:
      %228 = arith.constant 1 : i32
      func.return %228 : i32
    ^bb31:
      cf.br ^bb32
    ^bb32:
    %229 = arith.constant 0 : i32
    %230 = arith.extsi %229 : i32 to i64
    %231 = llvm.mlir.constant(1 : i64) : i64
    %232 = llvm.alloca %231 x i64 : (i64) -> !llvm.ptr
    llvm.store %230, %232 : i64, !llvm.ptr
    cf.br ^bb33
    ^bb33:
    %233 = llvm.load %232 : !llvm.ptr -> i64
    %234 = llvm.load %190 : !llvm.ptr -> i64
    %235 = arith.cmpi slt, %233, %234 : i64
    cf.cond_br %235, ^bb34, ^bb35
    ^bb34:
      %236 = llvm.mlir.addressof @UNKNOWN : !llvm.ptr
      %237 = llvm.load %236 : !llvm.ptr -> i64
      %238 = llvm.mlir.addressof @CACHE : !llvm.ptr
      %239 = llvm.load %238 : !llvm.ptr -> !llvm.ptr
      %240 = llvm.load %232 : !llvm.ptr -> i64
      %241 = llvm.getelementptr %239[%240] : (!llvm.ptr, i64) -> !llvm.ptr, i64
      llvm.store %237, %241 : i64, !llvm.ptr
      %242 = llvm.load %232 : !llvm.ptr -> i64
      %243 = arith.constant 1 : i32
      %245 = arith.extsi %243 : i32 to i64
      %244 = arith.addi %242, %245 : i64
      llvm.store %244, %232 : i64, !llvm.ptr
      cf.br ^bb33
    ^bb35:
    %246 = llvm.mlir.addressof @str_0 : !llvm.ptr
    %248 = arith.constant 0 : i32
    %247 = func.call @search(%183, %248) : (i32, i32) -> i64
    %249 = llvm.call @printf(%246, %247) vararg(!llvm.func<i32 (ptr, ...)>) : (!llvm.ptr, i64) -> i32
    %251 = llvm.mlir.addressof @CACHE : !llvm.ptr
    %252 = llvm.load %251 : !llvm.ptr -> !llvm.ptr
    func.call @free(%252) : (!llvm.ptr) -> ()
    %254 = llvm.mlir.addressof @NUM_VISITED : !llvm.ptr
    %255 = llvm.load %254 : !llvm.ptr -> !llvm.ptr
    func.call @free(%255) : (!llvm.ptr) -> ()
    %256 = arith.constant 0 : i32
    func.return %256 : i32
  }
}