MCInst: Add ::dump_pretty.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99216 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCInst.cpp b/lib/MC/MCInst.cpp
index 0634c9f..de142dc 100644
--- a/lib/MC/MCInst.cpp
+++ b/lib/MC/MCInst.cpp
@@ -9,6 +9,7 @@
 
 #include "llvm/MC/MCInst.h"
 #include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInstPrinter.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
 
@@ -43,6 +44,22 @@
   OS << ">";
 }
 
+void MCInst::dump_pretty(raw_ostream &OS, const MCAsmInfo *MAI,
+                         const MCInstPrinter *Printer,
+                         StringRef Separator) const {
+  OS << "<MCInst #" << getOpcode();
+
+  // Show the instruction opcode name if we have access to a printer.
+  if (Printer)
+    OS << ' ' << Printer->getOpcodeName(getOpcode());
+
+  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
+    OS << Separator;
+    getOperand(i).print(OS, MAI);
+  }
+  OS << ">\n";
+}
+
 void MCInst::dump() const {
   print(dbgs(), 0);
   dbgs() << "\n";