Add timing of the IR parsing code with a new -time-ir-parsing flag

llvm-svn: 177543

1 files changed, 21 insertions, 0 deletions

diff --git a/llvm/lib/Support/IRReader.cpp b/llvm/lib/Support/IRReader.cpp
new file mode 100644
index 00000000000..1dc56dddcbe
--- /dev/null
+++ b/llvm/lib/Support/IRReader.cpp
@@ -0,0 +1,21 @@
+//===- IRReader.cpp - Reader for LLVM IR files ----------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/IRReader.h"
+using namespace llvm;
+
+const char *llvm::TimeIRParsingGroupName = "LLVM IR Parsing";
+const char *llvm::TimeIRParsingName = "Parse IR";
+
+bool llvm::TimeIRParsingIsEnabled = false;
+static cl::opt<bool,true>
+EnableTimeIRParsing("time-ir-parsing", cl::location(TimeIRParsingIsEnabled),
+                    cl::desc("Measure the time IR parsing takes"));
+