1 // RUN: %clangxx_nsan -O0 -g -mavx %s -o %t 2 // RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s 3 // RUN: %clangxx_nsan -O3 -g -mavx %s -o %t 4 // RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s 5 #include <iostream> 6 #include <cmath> 7 8 typedef float v8sf __attribute__ ((vector_size(32))); 9 10 v8sf simd_sqrt(v8sf a) { 11 return __builtin_elementwise_sqrt(a); 12 // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected 13 } 14 15 int main() { 16 v8sf a = {-1.0, -2.0, -3.0, 4.0, 5.0, 6.0, 7.0, 8.0}; 17 a = simd_sqrt(a); 18 19 // This prevents DCE. 20 for (size_t i = 0; i < 8; ++i) { 21 std::cout << a[i] << std::endl; 22 // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected 23 } 24 return 0; 25 } 26