compiler-rt/test/ubsan/TestCases/Misc/deduplication.cpp

   1 // RUN: %clangxx -fsanitize=undefined %s -o %t && %run %t 2>&1 | FileCheck %s
   2 // Verify deduplication works by ensuring only one diag is emitted.
   3 #include <limits.h>
   4 #include <stdio.h>
   5
   6 void overflow() {
   7   int i = INT_MIN;
   8   --i;
   9 }
  10
  11 int main() {
  12   // CHECK: Start
  13   fprintf(stderr, "Start\n");
  14   fflush(stderr);
  15
  16   // CHECK: runtime error
  17   // CHECK-NOT: runtime error
  18   // CHECK-NOT: runtime error
  19   overflow();
  20   overflow();
  21   overflow();
  22
  23   // CHECK: End
  24   fprintf(stderr, "End\n");
  25   return 0;
  26 }