[libcxx] r342938 - Revert r342936 "Remove redundant null pointer check in operator delete"

[Louis Dionne]

Author: ldionne
Date: Mon Sep 24 21:13:08 2018
New Revision: 342938

URL: http://llvm.org/viewvc/llvm-project?rev=342938&view=rev
Log:
Revert r342936 "Remove redundant null pointer check in operator delete"

A review for the change was opened in https://reviews.llvm.org/D52401
but the change was committed before being approved by any of the code
owners for libc++.

Modified:
    libcxx/trunk/src/new.cpp

Modified: libcxx/trunk/src/new.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/src/new.cpp?rev=342938&r1=342937&r2=342938&view=diff
==============================================================================
--- libcxx/trunk/src/new.cpp (original)
+++ libcxx/trunk/src/new.cpp Mon Sep 24 21:13:08 2018
@@ -135,7 +135,8 @@ _LIBCPP_WEAK
 void
 operator delete(void* ptr) _NOEXCEPT
 {
-    ::free(ptr);
+    if (ptr)
+        ::free(ptr);
 }
 
 _LIBCPP_WEAK
@@ -256,10 +257,11 @@ _LIBCPP_WEAK
 void
 operator delete(void* ptr, std::align_val_t) _NOEXCEPT
 {
+    if (ptr)
 #if defined(_LIBCPP_MSVCRT_LIKE)
-    ::_aligned_free(ptr);
+        ::_aligned_free(ptr);
 #else
-    ::free(ptr);
+        ::free(ptr);
 #endif
 }