[asan] compiler-rt version of D113143

compiler-rt/test/asan/TestCases/PR52382.c

@@ -0,0 +1,12 @@
+// RUN: %clang_asan -O0 %s -o %t -w && not %run %t 2>&1 | FileCheck %s
+// RUN: %clang_asan -O2 %s -o %t -w && not %run %t 2>&1 | FileCheck %s
+
+int global_array[100] = {-1};
+
+// This access is 412 bytes after the start of the global: past the end of the
+// uninstrumented array, but within the bounds of the extended instrumented
+// array. We should ensure this is still instrumented.
+int main(void) { return global_array[103]; }
+
+// CHECK: AddressSanitizer: global-buffer-overflow on address
+// CHECK: is located 12 bytes to the right of global variable 'global_array'