Prevent new/delete replacement tests from being optimized away.

llvm-svn: 284289

3 files changed, 14 insertions, 17 deletions

diff --git a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/delete_align_val_t_replace.pass.cpp b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/delete_align_val_t_replace.pass.cpp
index 62ffa3f6f0c..decf26ed7a3 100644
--- a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/delete_align_val_t_replace.pass.cpp
+++ b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/delete_align_val_t_replace.pass.cpp
@@ -15,10 +15,7 @@
 // XFAIL: clang-3, apple-clang
 
 // None of the current GCC compilers support this.
-// XFAIL: gcc-4, gcc-5, gcc-6
-
-// TODO Investigate why UBSAN prevents new from calling our replacement.
-// XFAIL: ubsan
+// XFAIL: gcc
 
 #include <new>
 #include <cstddef>
@@ -58,28 +55,31 @@ void operator delete [] (void* p, std::align_val_t a) throw()
 struct alignas(OverAligned) A {};
 struct alignas(std::max_align_t) B {};
 
+B* volatile b; // Escape the memory
+A* volatile a;
+
 int main()
 {
     reset();
     {
-        B *x = new B[2];
+        b = new B[2];
         assert(0 == unsized_delete_called);
         assert(0 == unsized_delete_nothrow_called);
         assert(0 == aligned_delete_called);
 
-        delete [] x;
+        delete [] b;
         assert(1 == unsized_delete_called);
         assert(0 == unsized_delete_nothrow_called);
         assert(0 == aligned_delete_called);
     }
     reset();
     {
-        A *x = new A[2];
+        a = new A[2];
         assert(0 == unsized_delete_called);
         assert(0 == unsized_delete_nothrow_called);
         assert(0 == aligned_delete_called);
 
-        delete [] x;
+        delete [] a;
         assert(0 == unsized_delete_called);
         assert(0 == unsized_delete_nothrow_called);
         assert(1 == aligned_delete_called);
diff --git a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
index 5887bb0bdf3..3b0cb27e1de 100644
--- a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
+++ b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_nothrow_replace.pass.cpp
@@ -11,10 +11,6 @@
 
 // UNSUPPORTED: sanitizer-new-delete
 
-// TODO Investigate why UBSAN prevents new from calling our replacement.
-// XFAIL: ubsan
-
-
 #include <new>
 #include <cstddef>
 #include <cstdlib>
@@ -45,9 +41,11 @@ struct A
     ~A() {--A_constructed;}
 };
 
+A* volatile ap;
+
 int main()
 {
-    A* ap = new (std::nothrow) A[3];
+    ap = new (std::nothrow) A[3];
     assert(ap);
     assert(A_constructed == 3);
     assert(new_called);
diff --git a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
index 1e78ea8fe26..2815f5bc733 100644
--- a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
+++ b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/new_array_replace.pass.cpp
@@ -11,9 +11,6 @@
 
 // UNSUPPORTED: sanitizer-new-delete
 
-// TODO Investigate why UBSAN prevents new from calling our replacement.
-// XFAIL: ubsan
-
 
 #include <new>
 #include <cstddef>
@@ -45,9 +42,11 @@ struct A
     ~A() {--A_constructed;}
 };
 
+A* volatile ap;
+
 int main()
 {
-    A* ap = new A[3];
+    ap = new A[3];
     assert(ap);
     assert(A_constructed == 3);
     assert(new_called == 1);