compiler-rt/test/msan/select_float_origin.cpp

   1 // Regression test for origin propagation in "select i1, float, float".
   2 // https://code.google.com/p/memory-sanitizer/issues/detail?id=78
   3
   4 // RUN: %clangxx_msan -O2 -fsanitize-memory-track-origins %s -o %t && not %run %t >%t.out 2>&1
   5 // RUN: FileCheck %s < %t.out
   6
   7 // RUN: %clangxx_msan -O2 -fsanitize-memory-track-origins=2 %s -o %t && not %run %t >%t.out 2>&1
   8 // RUN: FileCheck %s < %t.out
   9
  10 #include <stdio.h>
  11 #include <sanitizer/msan_interface.h>
  12
  13 int main() {
  14   volatile bool b = true;
  15   float x, y;
  16   __msan_allocated_memory(&x, sizeof(x));
  17   __msan_allocated_memory(&y, sizeof(y));
  18   float z = b ? x : y;
  19   if (z > 0) printf(".\n");
  20   // CHECK: Memory was marked as uninitialized
  21   // CHECK: {{#0 0x.* in .*__msan_allocated_memory}}
  22   // CHECK: {{#1 0x.* in main .*select_float_origin.cpp:}}[[@LINE-6]]
  23   return 0;
  24 }