Turn LLVM_ENABLE_ABI_BREAKING_CHECKS into a 0/1 definition like

LLVM_ENABLE_THREADS. Include llvm-config.h explicitly in headers to make
sure that the definition is available.

llvm-svn: 282907

llvm/include/llvm/ADT/EpochTracker.h

@@ -22,22 +22,7 @@
 
 namespace llvm {
 
-#ifndef LLVM_ENABLE_ABI_BREAKING_CHECKS
-
-class DebugEpochBase {
-public:
-  void incrementEpoch() {}
-
-  class HandleBase {
-  public:
-    HandleBase() = default;
-    explicit HandleBase(const DebugEpochBase *) {}
-    bool isHandleInSync() const { return true; }
-    const void *getEpochAddress() const { return nullptr; }
-  };
-};
-
-#else
+#if LLVM_ENABLE_ABI_BREAKING_CHECKS
 
 /// \brief A base class for data structure classes wishing to make iterators
 /// ("handles") pointing into themselves fail-fast.  When building without
@@ -92,6 +77,21 @@ public:
   };
 };
 
+#else
+
+class DebugEpochBase {
+public:
+  void incrementEpoch() {}
+
+  class HandleBase {
+  public:
+    HandleBase() = default;
+    explicit HandleBase(const DebugEpochBase *) {}
+    bool isHandleInSync() const { return true; }
+    const void *getEpochAddress() const { return nullptr; }
+  };
+};
+
 #endif // LLVM_ENABLE_ABI_BREAKING_CHECKS
 
 } // namespace llvm

llvm/include/llvm/ADT/ilist_node_options.h

@@ -10,6 +10,8 @@
 #ifndef LLVM_ADT_ILIST_NODE_OPTIONS_H
 #define LLVM_ADT_ILIST_NODE_OPTIONS_H
 
+#include "llvm/Config/llvm-config.h"
+
 #include <type_traits>
 
 namespace llvm {
@@ -64,7 +66,7 @@ struct extract_sentinel_tracking<
 template <class Option1, class... Options>
 struct extract_sentinel_tracking<Option1, Options...>
     : extract_sentinel_tracking<Options...> {};
-#ifdef LLVM_ENABLE_ABI_BREAKING_CHECKS
+#if LLVM_ENABLE_ABI_BREAKING_CHECKS
 template <> struct extract_sentinel_tracking<> : std::true_type, is_implicit {};
 #else
 template <>

llvm/include/llvm/Config/config.h.cmake

@@ -375,9 +375,8 @@
 /* Installation directory for documentation */
 #cmakedefine LLVM_DOCSDIR "${LLVM_DOCSDIR}"
 
-/* Define if LLVM is built with asserts and checks that change the layout of
-   client-visible data structures.  */
-#cmakedefine LLVM_ENABLE_ABI_BREAKING_CHECKS
+/* Define to enable checks that alter the LLVM C++ ABI */
+#cmakedefine01 LLVM_ENABLE_ABI_BREAKING_CHECKS
 
 /* Define if threads enabled */
 #cmakedefine01 LLVM_ENABLE_THREADS

llvm/include/llvm/Config/llvm-config.h.cmake

@@ -26,9 +26,8 @@
 /* Installation directory for documentation */
 #cmakedefine LLVM_DOCSDIR "${LLVM_DOCSDIR}"
 
-/* Define if LLVM is built with asserts and checks that change the layout of
-   client-visible data structures.  */
-#cmakedefine LLVM_ENABLE_ABI_BREAKING_CHECKS
+/* Define to enable checks that alter the LLVM C++ ABI */
+#cmakedefine01 LLVM_ENABLE_ABI_BREAKING_CHECKS
 
 /* Define if threads enabled */
 #cmakedefine01 LLVM_ENABLE_THREADS

llvm/unittests/ADT/IListSentinelTest.cpp

@@ -37,7 +37,7 @@ TEST(IListSentinelTest, DefaultConstructor) {
   Sentinel S;
   EXPECT_EQ(&S, LocalAccess::getPrev(S));
   EXPECT_EQ(&S, LocalAccess::getNext(S));
-#ifdef LLVM_ENABLE_ABI_BREAKING_CHECKS
+#if LLVM_ENABLE_ABI_BREAKING_CHECKS
   EXPECT_TRUE(S.isKnownSentinel());
 #else
   EXPECT_FALSE(S.isKnownSentinel());