[PATCH] Emit comment for gc.relocate's showing base and derived pointers in human readable form

[Phabricator]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9326

Files:
  llvm/trunk/lib/IR/AsmWriter.cpp

Index: llvm/trunk/lib/IR/AsmWriter.cpp
===================================================================
--- llvm/trunk/lib/IR/AsmWriter.cpp
+++ llvm/trunk/lib/IR/AsmWriter.cpp
@@ -31,6 +31,7 @@
 #include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IR/Operator.h"
+#include "llvm/IR/Statepoint.h"
 #include "llvm/IR/TypeFinder.h"
 #include "llvm/IR/UseListOrder.h"
 #include "llvm/IR/ValueSymbolTable.h"
@@ -2002,6 +2003,10 @@
   // printInfoComment - Print a little comment after the instruction indicating
   // which slot it occupies.
   void printInfoComment(const Value &V);
+
+  // printGCRelocateComment - print comment after call to the gc.relocate
+  // intrinsic indicating base and derived pointer names.
+  void printGCRelocateComment(const Value &V);
 };
 } // namespace
 
@@ -2642,10 +2647,26 @@
   Out << '\n';
 }
 
+/// printGCRelocateComment - print comment after call to the gc.relocate
+/// intrinsic indicating base and derived pointer names.
+void AssemblyWriter::printGCRelocateComment(const Value &V) {
+  assert(isGCRelocate(&V));
+  GCRelocateOperands GCOps(cast<Instruction>(&V));
+
+  Out << " ; (";
+  writeOperand(GCOps.basePtr(), false);
+  Out << ", ";
+  writeOperand(GCOps.derivedPtr(), false);
+  Out << ")";
+}
+
 /// printInfoComment - Print a little comment after the instruction indicating
 /// which slot it occupies.
 ///
 void AssemblyWriter::printInfoComment(const Value &V) {
+  if (isGCRelocate(&V))
+    printGCRelocateComment(V);
+
   if (AnnotationWriter)
     AnnotationWriter->printInfoComment(V, Out);
 }

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