test/msan/vector_cvt.cc

   1 // RUN: %clangxx_msan -m64 -O0 %s -o %t && %run %t
   2 // RUN: %clangxx_msan -DPOSITIVE -m64 -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
   3
   4 #include <emmintrin.h>
   5
   6 int to_int(double v) {
   7   __m128d t = _mm_set_sd(v);
   8   int x = _mm_cvtsd_si32(t);
   9   return x;
  10   // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  11   // CHECK: #{{.*}} in to_int{{.*}}vector_cvt.cc:[[@LINE-4]]
  12 }
  13
  14 int main() {
  15 #ifdef POSITIVE
  16   double v;
  17 #else
  18   double v = 1.1;
  19 #endif
  20   double* volatile p = &v;
  21   int x = to_int(*p);
  22   return !x;
  23 }