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      1 // RUN: %clangxx_asan -O0 -mllvm -asan-instrument-allocas %s -o %t
      2 // RUN: %run %t 2>&1
      3 //
      4 
      5 #include <assert.h>
      6 
      7 __attribute__((noinline)) void foo(int index, int len) {
      8   volatile char str[len] __attribute__((aligned(32)));
      9   assert(!(reinterpret_cast<long>(str) & 31L));
     10   str[index] = '1';
     11 }
     12 
     13 int main(int argc, char **argv) {
     14   foo(4, 5);
     15   foo(39, 40);
     16   return 0;
     17 }
     18