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