Add __builtin_operator_new and __builtin_operator_delete, which act like calls

to the normal non-placement ::operator new and ::operator delete, but allow
optimizations like new-expressions and delete-expressions do.

llvm-svn: 210137

2 files changed, 14 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/new.cpp b/clang/test/CodeGenCXX/new.cpp
index 26db84225f1..d8aa258cbbf 100644
--- a/clang/test/CodeGenCXX/new.cpp
+++ b/clang/test/CodeGenCXX/new.cpp
@@ -326,6 +326,15 @@ namespace N3664 {
   }
 }
 
+namespace builtins {
+  // CHECK-LABEL: define void @_ZN8builtins1fEv
+  void f() {
+    // CHECK: call noalias i8* @_Znwm(i64 4) [[ATTR_BUILTIN_NEW]]
+    // CHECK: call void @_ZdlPv({{.*}}) [[ATTR_BUILTIN_DELETE]]
+    __builtin_operator_delete(__builtin_operator_new(4));
+  }
+}
+
 // CHECK-DAG: attributes [[ATTR_NOBUILTIN]] = {{[{].*}} nobuiltin {{.*[}]}}
 // CHECK-DAG: attributes [[ATTR_NOBUILTIN_NOUNWIND]] = {{[{].*}} nobuiltin nounwind {{.*[}]}}
 
diff --git a/clang/test/Sema/builtins.c b/clang/test/Sema/builtins.c
index 8ca33c8e752..7647100bc27 100644
--- a/clang/test/Sema/builtins.c
+++ b/clang/test/Sema/builtins.c
@@ -197,3 +197,8 @@ void no_ms_builtins() {
   __noop(1); // expected-warning {{implicit declaration}}
   __debugbreak(); // expected-warning {{implicit declaration}}
 }
+
+void unavailable() {
+  __builtin_operator_new(0); // expected-error {{'__builtin_operator_new' is only available in C++}}
+  __builtin_operator_delete(0); // expected-error {{'__builtin_operator_delete' is only available in C++}}
+}