[clang] [clang][repl] fix `new` on Mac M1 (PR #69072)

[Maksim Levental via cfe-commits]

https://github.com/makslevental created https://github.com/llvm/llvm-project/pull/69072

On Mac M1, if you load something that transitively loads `#include <new>`, it will fail because 

```
In file included from <<< inputs >>>:1:
In file included from input_line_22:1:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/memory:671:
In file included from /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/__functional_base:23:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/new:214:70: error: 'internal_linkage' attribute does not appear on the first declaration
  214 | _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY void* operator new  (std::size_t, void* __p) _NOEXCEPT {return __p;}
      |                                                                      ^
input_line_0:3:11: note: previous declaration is here
    3 |     void* operator new(__SIZE_TYPE__, void* __p) noexcept;
      |           ^
Assertion failed: (Ptr && "dereferencing end() iterator"), function operator*, file DeclBase.h, line 1315.
```

This is because `MacOSX12.3.sdk/usr/include/c++/v1/__config` sets `_LIBCPP_INLINE_VISIBILITY` to be `__attribute__((__visibility__("hidden"))) __attribute__((internal_linkage))`, which makes the `new` in `<new>` incompatible with the hardcoded decl `void* operator new(__SIZE_TYPE__, void* __p) noexcept;` in `clang/lib/Interpreter/Interpreter::Runtimes`. I believe the correct thing to do is replace that decl with `#include <new>` (as I've done here).

>From d7c57d94d7e75ed1e0df87ebf3c4464e7b951453 Mon Sep 17 00:00:00 2001
From: max <maksim.levental at gmail.com>
Date: Sat, 14 Oct 2023 12:46:42 -0500
Subject: [PATCH] [clang][repl] fix `new`

---
 clang/lib/Interpreter/Interpreter.cpp | 2 +-
 clang/test/Interpreter/execute.cpp    | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Interpreter/Interpreter.cpp b/clang/lib/Interpreter/Interpreter.cpp
index 7968c62cbd3e7b3..ddfbc9ac01c6743 100644
--- a/clang/lib/Interpreter/Interpreter.cpp
+++ b/clang/lib/Interpreter/Interpreter.cpp
@@ -248,7 +248,7 @@ Interpreter::~Interpreter() {
 // can't find the precise resource directory in unittests so we have to hard
 // code them.
 const char *const Runtimes = R"(
-    void* operator new(__SIZE_TYPE__, void* __p) noexcept;
+    #include <new>
     void *__clang_Interpreter_SetValueWithAlloc(void*, void*, void*);
     void __clang_Interpreter_SetValueNoAlloc(void*, void*, void*);
     void __clang_Interpreter_SetValueNoAlloc(void*, void*, void*, void*);
diff --git a/clang/test/Interpreter/execute.cpp b/clang/test/Interpreter/execute.cpp
index 6e73ed3927e8155..d54ab99749c1bac 100644
--- a/clang/test/Interpreter/execute.cpp
+++ b/clang/test/Interpreter/execute.cpp
@@ -20,4 +20,6 @@ auto r2 = printf("S[f=%f, m=0x%llx]\n", s.f, reinterpret_cast<unsigned long long
 inline int foo() { return 42; }
 int r3 = foo();
 
+#include <memory>
+
 %quit