1 files changed, 74 insertions, 0 deletions
diff --git a/test/asan/TestCases/invalid-pointer-pairs-compare-success.cc b/test/asan/TestCases/invalid-pointer-pairs-compare-success.cc
new file mode 100644
index 000000000000..565d39088340
--- /dev/null
+++ b/test/asan/TestCases/invalid-pointer-pairs-compare-success.cc
@@ -0,0 +1,74 @@
+// RUN: %clangxx_asan -O0 %s -o %t -mllvm -asan-detect-invalid-pointer-pair
+
+// RUN: %env_asan_opts=detect_invalid_pointer_pairs=1 %run %t
+
+#include <assert.h>
+#include <stdlib.h>
+
+int foo(char *p) {
+  char *p2 = p + 20;
+  return p > p2;
+}
+
+int bar(char *p, char *q) {
+  return p <= q;
+}
+
+int baz(char *p, char *q) {
+  return p != 0 && p < q;
+}
+
+char global[8192] = {};
+char small_global[7] = {};
+
+int main() {
+  // Heap allocated memory.
+  char *p = (char *)malloc(42);
+  int r = foo(p);
+  free(p);
+
+  p = (char *)malloc(1024);
+  bar(p, p + 1024);
+  bar(p + 1024, p + 1023);
+  bar(p + 1, p + 1023);
+  free(p);
+
+  p = (char *)malloc(4096);
+  bar(p, p + 4096);
+  bar(p + 10, p + 100);
+  bar(p + 1024, p + 4096);
+  bar(p + 4095, p + 4096);
+  bar(p + 4095, p + 4094);
+  bar(p + 100, p + 4096);
+  bar(p + 100, p + 4094);
+  free(p);
+
+  // Global variable.
+  bar(&global[0], &global[1]);
+  bar(&global[1], &global[2]);
+  bar(&global[2], &global[1]);
+  bar(&global[0], &global[100]);
+  bar(&global[1000], &global[7000]);
+  bar(&global[500], &global[10]);
+  p = &global[0];
+  bar(p, p + 8192);
+  p = &global[8000];
+  bar(p, p + 192);
+
+  p = &small_global[0];
+  bar(p, p + 1);
+  bar(p, p + 7);
+  bar(p + 7, p + 1);
+  bar(p + 6, p + 7);
+  bar(p + 7, p + 7);
+
+  // Stack variable.
+  char stack[10000];
+  bar(&stack[0], &stack[100]);
+  bar(&stack[1000], &stack[9000]);
+  bar(&stack[500], &stack[10]);
+
+  baz(0, &stack[10]);
+
+  return 0;
+}