151365212SAlexander Shaposhnikov // RUN: %clangxx_nsan -O0 -g -mavx %s -o %t 2*52ae8910SHarini0924 // RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s 351365212SAlexander Shaposhnikov // RUN: %clangxx_nsan -O3 -g -mavx %s -o %t 4*52ae8910SHarini0924 // RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s 551365212SAlexander Shaposhnikov #include <iostream> 651365212SAlexander Shaposhnikov #include <cmath> 751365212SAlexander Shaposhnikov 851365212SAlexander Shaposhnikov typedef float v8sf __attribute__ ((vector_size(32))); 951365212SAlexander Shaposhnikov 1051365212SAlexander Shaposhnikov v8sf simd_sqrt(v8sf a) { 1151365212SAlexander Shaposhnikov return __builtin_elementwise_sqrt(a); 1251365212SAlexander Shaposhnikov // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected 1351365212SAlexander Shaposhnikov } 1451365212SAlexander Shaposhnikov 1551365212SAlexander Shaposhnikov int main() { 1651365212SAlexander Shaposhnikov v8sf a = {-1.0, -2.0, -3.0, 4.0, 5.0, 6.0, 7.0, 8.0}; 1751365212SAlexander Shaposhnikov a = simd_sqrt(a); 1851365212SAlexander Shaposhnikov 1951365212SAlexander Shaposhnikov // This prevents DCE. 2051365212SAlexander Shaposhnikov for (size_t i = 0; i < 8; ++i) { 2151365212SAlexander Shaposhnikov std::cout << a[i] << std::endl; 2251365212SAlexander Shaposhnikov // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected 2351365212SAlexander Shaposhnikov } 2451365212SAlexander Shaposhnikov return 0; 2551365212SAlexander Shaposhnikov } 26