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

[Igor Laevsky]

Hi reames,

In AsmWriter emit comment for gc.relocate showing base and derived pointer in human readable form. This is a lot more convenient than looking just at the indexes in this call.

Example: %67 = call float addrspace(1)* @llvm.experimental.gc.relocate.p1f32(i32 %sp, i32 40, i32 31) ; (%base, %derived)

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9326

Files:
  lib/IR/AsmWriter.cpp

Index: lib/IR/AsmWriter.cpp
===================================================================
--- lib/IR/AsmWriter.cpp
+++ 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"
@@ -2970,6 +2971,18 @@
   I.getAllMetadata(InstMD);
   printMetadataAttachments(InstMD, ", ");
 
+  // Print additional comment for gc.statepoint relocates in a form of
+  // "; (<base pointer>, <derived pointer>)"
+  if (isGCRelocate(&I)) {
+    GCRelocateOperands GCOps(&I);
+
+    Out << " ; (";
+    writeOperand(GCOps.basePtr(), false);
+    Out << ", ";
+    writeOperand(GCOps.derivedPtr(), false);
+    Out << ")";
+  }
+
   // Print a nice comment.
   printInfoComment(I);
 }

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