Support: Drop LLVM_ATTRIBUTE_UNUSED_RESULT

Uses of this have all been updated to use LLVM_NODISCARD, which matches the C++17 [[nodiscard]] semantics rather than those of GCC's __attribute__((warn_unused_result)). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@284367 91177308-0d34-0410-b5e6-96231b3b80d8
hacxman · Oct 17, 2016 · 0ebe9c2 · 0ebe9c2
1 parent 043b10d
commit 0ebe9c2
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diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst
@@ -41,6 +41,10 @@ Non-comprehensive list of changes in this release
    functionality, or simply have a lot to talk about), see the `NOTE` below
    for adding a new subsection.
 
+* The definition and uses of LLVM_ATRIBUTE_UNUSED_RESULT in the LLVM source
+  were replaced with LLVM_NODISCARD, which matches the C++17 [[nodiscard]]
+  semantics rather than gcc's __attribute__((warn_unused_result)).
+
 * ... next change ...
 
 .. NOTE

diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h
@@ -130,15 +130,6 @@
 #define LLVM_ATTRIBUTE_USED
 #endif
 
-/// LLVM_ATTRIBUTE_UNUSED_RESULT - Deprecated. Use LLVM_NODISCARD instead.
-#if __has_attribute(warn_unused_result) || LLVM_GNUC_PREREQ(3, 4, 0)
-#define LLVM_ATTRIBUTE_UNUSED_RESULT __attribute__((__warn_unused_result__))
-#elif defined(_MSC_VER)
-#define LLVM_ATTRIBUTE_UNUSED_RESULT _Check_return_
-#else
-#define LLVM_ATTRIBUTE_UNUSED_RESULT
-#endif
-
 /// LLVM_NODISCARD - Warn if a type or return value is discarded.
 #if __cplusplus > 201402L && __has_cpp_attribute(nodiscard)
 #define LLVM_NODISCARD [[nodiscard]]