brintos

brintos / llvm-project-archived public Read only

0
0
Text · 1.4 KiB · 709132c Raw
45 lines · cpp
1// RUN: %clang_tysan -O0 %s -o %t && %run %t >%t.out 2>&12// RUN: FileCheck %s < %t.out3 4// https://github.com/llvm/llvm-project/issues/628285#include <stdio.h>6 7typedef int int_v8[8];8typedef short short_v8[8];9short *test1(int_v8 *cast_c_array, short_v8 *shuf_c_array1, int *ptr) {10  int *input1 = reinterpret_cast<int *>(((int_v8 *)(cast_c_array)));11  short *input2 = reinterpret_cast<short *>(reinterpret_cast<int_v8 *>(input1));12 13  short *output1 = reinterpret_cast<short *>(((short_v8 *)(shuf_c_array1)));14  short *output2 =15      reinterpret_cast<short *>(reinterpret_cast<short_v8 *>(output1));16 17  for (int r = 0; r < 8; ++r) {18    int tmp = (int)((r * 4) + ptr[r]);19    if ((ptr[r] / 4) == 0) {20      int *input = reinterpret_cast<int *>(((int_v8 *)(cast_c_array)));21      input[r] = tmp;22    }23  }24 25  // CHECK:      ERROR: TypeSanitizer: type-aliasing-violation on address26  // CHECK-NEXT: READ of size 2 at {{.+}} with type short accesses an existing object of type int27  // CHECK-NEXT:    in test1(int (*) [8], short (*) [8], int*) {{.*/?}}violation-pr62828.cpp:2928  for (int i3 = 0; i3 < 4; ++i3) {29    output2[i3] = input2[(i3 * 2)];30  }31  return output2;32}33 34int main() {35  int_v8 in[4] = {{4, 4, 4, 4}};36  short_v8 out[4] = {{0}};37  int ptr[8] = {2};38  test1(in, out, ptr);39  short *p = reinterpret_cast<short *>(out);40  for (int i = 0; i < 32; i++) {41    printf("%d ", p[i]);42  }43  return 0;44}45