compiler-rt/test/msan/vector_cvt.cpp

   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(v);
   9   int x = _mm_cvtsd_si32(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(*p);
  23   return !x;
  24 }