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-rw-r--r--llvm/lib/Support/CommandLine.cpp24
1 files changed, 23 insertions, 1 deletions
diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index ce1463462b1..e4e2f005543 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -2436,6 +2436,28 @@ static VersionPrinterTy OverrideVersionPrinter = nullptr;
static std::vector<VersionPrinterTy> *ExtraVersionPrinters = nullptr;
+#if defined(__GNUC__)
+// GCC and GCC-compatible compilers define __OPTIMIZE__ when optimizations are
+// enabled.
+# if defined(__OPTIMIZE__)
+# define LLVM_IS_DEBUG_BUILD 0
+# else
+# define LLVM_IS_DEBUG_BUILD 1
+# endif
+#elif defined(_MSC_VER)
+// MSVC doesn't have a predefined macro indicating if optimizations are enabled.
+// Use _DEBUG instead. This macro actually corresponds to the choice between
+// debug and release CRTs, but it is a reasonable proxy.
+# if defined(_DEBUG)
+# define LLVM_IS_DEBUG_BUILD 1
+# else
+# define LLVM_IS_DEBUG_BUILD 0
+# endif
+#else
+// Otherwise, for an unknown compiler, assume this is an optimized build.
+# define LLVM_IS_DEBUG_BUILD 0
+#endif
+
namespace {
class VersionPrinter {
public:
@@ -2451,7 +2473,7 @@ public:
OS << " " << LLVM_VERSION_INFO;
#endif
OS << "\n ";
-#ifndef __OPTIMIZE__
+#if LLVM_IS_DEBUG_BUILD
OS << "DEBUG build";
#else
OS << "Optimized build";
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