[PATCH] D71817: Fix LLVM tool --version build mode printing for MSVC
Reid Kleckner via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sun Dec 22 13:31:08 PST 2019
rnk created this revision.
rnk added a reviewer: RKSimon.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.
LLVM tools such as llc print "DEBUG build" or "Optimized build" when
passed --version. Before this change, this was implemented by checking
for the __OPTIMIZE__ GCC macro. MSVC does not define this macro. For
MSVC, control this behavior with _DEBUG instead. It doesn't have
precisely the same meaning, but in most configurations, it will do the
right thing.
Fixes PR17752
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D71817
Files:
llvm/lib/Support/CommandLine.cpp
Index: llvm/lib/Support/CommandLine.cpp
===================================================================
--- llvm/lib/Support/CommandLine.cpp
+++ llvm/lib/Support/CommandLine.cpp
@@ -2436,6 +2436,28 @@
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 @@
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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