IRgen: Add CGRecordLayout::dump, and dump (irgen) record layouts as part of -fdump-record-layouts.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101051 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 47 insertions, 1 deletions

diff --git a/lib/CodeGen/CGRecordLayout.h b/lib/CodeGen/CGRecordLayout.h
index 86c57d10c4..2fb8191cf2 100644
--- a/lib/CodeGen/CGRecordLayout.h
+++ b/lib/CodeGen/CGRecordLayout.h
@@ -13,12 +13,15 @@
 #include "llvm/ADT/DenseMap.h"
 #include "clang/AST/Decl.h"
 namespace llvm {
+  class raw_ostream;
   class Type;
 }
 
 namespace clang {
 namespace CodeGen {
 
+/// Helper object for describing how to generate the code for access to a
+/// bit-field.
 class CGBitFieldInfo {
 public:
   CGBitFieldInfo(const llvm::Type *FieldTy, unsigned FieldNo,
@@ -32,6 +35,9 @@ public:
   unsigned Start;
   unsigned Size;
   bool IsSigned : 1;
+
+  void print(llvm::raw_ostream &OS) const;
+  void dump() const;
 };
 
 /// CGRecordLayout - This class handles struct and union layout info while
@@ -90,6 +96,9 @@ public:
     assert(it != BitFields.end()  && "Unable to find bitfield info");
     return it->second;
   }
+
+  void print(llvm::raw_ostream &OS) const;
+  void dump() const;
 };
 
 }  // end namespace CodeGen
diff --git a/lib/CodeGen/CGRecordLayoutBuilder.cpp b/lib/CodeGen/CGRecordLayoutBuilder.cpp
index fdd8d05926..57438e6b06 100644
--- a/lib/CodeGen/CGRecordLayoutBuilder.cpp
+++ b/lib/CodeGen/CGRecordLayoutBuilder.cpp
@@ -18,8 +18,9 @@
 #include "clang/AST/Expr.h"
 #include "clang/AST/RecordLayout.h"
 #include "CodeGenTypes.h"
-#include "llvm/Type.h"
 #include "llvm/DerivedTypes.h"
+#include "llvm/Type.h"
+#include "llvm/Support/raw_ostream.h"
 #include "llvm/Target/TargetData.h"
 using namespace clang;
 using namespace CodeGen;
@@ -496,5 +497,41 @@ CGRecordLayout *CodeGenTypes::ComputeRecordLayout(const RecordDecl *D) {
   for (unsigned i = 0, e = Builder.LLVMBitFields.size(); i != e; ++i)
     RL->BitFields.insert(Builder.LLVMBitFields[i]);
 
+  if (getContext().getLangOptions().DumpRecordLayouts)
+    RL->dump();
+
   return RL;
 }
+
+void CGRecordLayout::print(llvm::raw_ostream &OS) const {
+  OS << "<CGRecordLayout\n";
+  OS << "  LLVMType:" << *LLVMType << "\n";
+  OS << "  ContainsPointerToDataMember:" << ContainsPointerToDataMember << "\n";
+  OS << "  BitFields:[\n";
+  for (llvm::DenseMap<const FieldDecl*, CGBitFieldInfo>::const_iterator
+         it = BitFields.begin(), ie = BitFields.end();
+       it != ie; ++it) {
+    OS << "    ";
+    it->second.print(OS);
+    OS << "\n";
+  }
+  OS << "]>\n";
+}
+
+void CGRecordLayout::dump() const {
+  print(llvm::errs());
+}
+
+void CGBitFieldInfo::print(llvm::raw_ostream &OS) const {
+  OS << "<CGBitFieldInfo";
+  OS << " FieldTy:" << *FieldTy;
+  OS << " FieldNo:" << FieldNo;
+  OS << " Start:" << Start;
+  OS << " Size:" << Size;
+  OS << " IsSigned:" << IsSigned;
+  OS << ">";
+}
+
+void CGBitFieldInfo::dump() const {
+  print(llvm::errs());
+}