| 1 | // RUN: %clangxx_msan -O0 %s -o %t && %run %t |
| 2 | // RUN: %clangxx_msan -DPOSITIVE -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s |
| 3 | // REQUIRES: x86_64-target-arch |
| 4 | |
| 5 | #include <emmintrin.h> |
| 6 | |
| 7 | int to_int(double &v) { |
| 8 | __m128d t = _mm_set_sd(w: v); |
| 9 | int x = _mm_cvtsd_si32(a: t); |
| 10 | return x; |
| 11 | // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value |
| 12 | // CHECK: #{{.*}} in to_int{{.*}}vector_cvt.cpp:[[@LINE-3]] |
| 13 | } |
| 14 | |
| 15 | int main() { |
| 16 | #ifdef POSITIVE |
| 17 | double v; |
| 18 | #else |
| 19 | double v = 1.1; |
| 20 | #endif |
| 21 | double* volatile p = &v; |
| 22 | int x = to_int(v&: *p); |
| 23 | return !x; |
| 24 | } |
| 25 | |