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1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_clzdi23 4#include "int_lib.h"5#include <stdio.h>6 7// Returns: the number of leading 0-bits8 9// Precondition: a != 010 11COMPILER_RT_ABI int __clzdi2(di_int a);12 13int test__clzdi2(di_int a, int expected)14{15    int x = __clzdi2(a);16    if (x != expected)17        printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected);18    return x != expected;19}20 21char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};22 23int main()24{25    const int N = (int)(sizeof(di_int) * CHAR_BIT);26//    if (test__clzdi2(0x00000000, N))  // undefined27//        return 1;28    if (test__clzdi2(0x00000001, N-1))29        return 1;30    if (test__clzdi2(0x00000002, N-2))31        return 1;32    if (test__clzdi2(0x00000003, N-2))33        return 1;34    if (test__clzdi2(0x00000004, N-3))35        return 1;36    if (test__clzdi2(0x00000005, N-3))37        return 1;38    if (test__clzdi2(0x0000000A, N-4))39        return 1;40    if (test__clzdi2(0x1000000A, N/2+3))41        return 1;42    if (test__clzdi2(0x2000000A, N/2+2))43        return 1;44    if (test__clzdi2(0x6000000A, N/2+1))45        return 1;46    if (test__clzdi2(0x8000000AuLL, N/2))47        return 1;48    if (test__clzdi2(0x000005008000000AuLL, 21))49        return 1;50    if (test__clzdi2(0x020005008000000AuLL, 6))51        return 1;52    if (test__clzdi2(0x720005008000000AuLL, 1))53        return 1;54    if (test__clzdi2(0x820005008000000AuLL, 0))55        return 1;56 57   return 0;58}59