Add a -dump-record-layouts argument to clang-cc.

llvm-svn: 82703

clang/clang.xcodeproj/project.pbxproj

@@ -342,7 +342,7 @@
 		1A2193CC0F45EEB700C0713D /* Mangle.cpp */ = {isa = PBXFileReference; fileEncoding = 4; indentWidth = 2; lastKnownFileType = sourcecode.cpp.cpp; name = Mangle.cpp; path = lib/CodeGen/Mangle.cpp; sourceTree = "<group>"; tabWidth = 2; };
 		1A2193CD0F45EEB700C0713D /* Mangle.h */ = {isa = PBXFileReference; fileEncoding = 4; indentWidth = 2; lastKnownFileType = sourcecode.c.h; name = Mangle.h; path = lib/CodeGen/Mangle.h; sourceTree = "<group>"; tabWidth = 2; };
 		1A2A54A40FD1DD1C00F4CE45 /* AnalysisConsumer.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = AnalysisConsumer.cpp; path = lib/Frontend/AnalysisConsumer.cpp; sourceTree = "<group>"; };
-		1A2A54A50FD1DD1C00F4CE45 /* ASTConsumers.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = ASTConsumers.cpp; path = lib/Frontend/ASTConsumers.cpp; sourceTree = "<group>"; };
+		1A2A54A50FD1DD1C00F4CE45 /* ASTConsumers.cpp */ = {isa = PBXFileReference; fileEncoding = 4; indentWidth = 2; lastKnownFileType = sourcecode.cpp.cpp; name = ASTConsumers.cpp; path = lib/Frontend/ASTConsumers.cpp; sourceTree = "<group>"; tabWidth = 2; };
 		1A2A54A60FD1DD1C00F4CE45 /* Backend.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = Backend.cpp; path = lib/Frontend/Backend.cpp; sourceTree = "<group>"; };
 		1A2A54A70FD1DD1C00F4CE45 /* CacheTokens.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = CacheTokens.cpp; path = lib/Frontend/CacheTokens.cpp; sourceTree = "<group>"; };
 		1A2A54A80FD1DD1C00F4CE45 /* DependencyFile.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = DependencyFile.cpp; path = lib/Frontend/DependencyFile.cpp; sourceTree = "<group>"; };

clang/include/clang/Frontend/ASTConsumers.h

@@ -57,6 +57,10 @@ ASTConsumer *CreateASTViewer();
 // to stderr; this is intended for debugging.
 ASTConsumer *CreateDeclContextPrinter();
 
+// RecordLayout dumper: prints out the record layout information for all records
+// in the translation unit; this is intended for debugging.
+ASTConsumer *CreateRecordLayoutDumper();
+
 // ObjC rewriter: attempts tp rewrite ObjC constructs into pure C code.
 // This is considered experimental, and only works with Apple's ObjC runtime.
 ASTConsumer *CreateObjCRewriter(const std::string &InFile,

clang/lib/Frontend/ASTConsumers.cpp

@@ -20,6 +20,7 @@
 #include "clang/AST/AST.h"
 #include "clang/AST/ASTConsumer.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/RecordLayout.h"
 #include "clang/AST/PrettyPrinter.h"
 #include "clang/CodeGen/ModuleBuilder.h"
 #include "llvm/Module.h"
@@ -418,6 +419,55 @@ ASTConsumer *clang::CreateDeclContextPrinter() {
   return new DeclContextPrinter();
 }
 
+//===----------------------------------------------------------------------===//
+/// RecordLayoutDumper - C++ Record Layout Dumping.
+namespace {
+class RecordLayoutDumper : public ASTConsumer {
+  llvm::raw_ostream& Out;
+  
+  // FIXME: Maybe this be useful in ASTContext.cpp.
+  void DumpRecordLayout(const CXXRecordDecl *RD, ASTContext &C) {
+    const ASTRecordLayout &Info = C.getASTRecordLayout(RD);
+    
+    Out << RD->getKindName() << ' ' << RD->getQualifiedNameAsString() << '\n';
+    Out << "  sizeof=" << Info.getSize() / 8;
+    Out << ", dsize=" << Info.getDataSize() / 8;
+    Out << ", align=" << Info.getAlignment() / 8 << '\n';
+    Out << "  nvsize=" << Info.getNonVirtualSize() / 8;
+    Out << ", nvalign=" << Info.getNonVirtualAlign() / 8 << '\n';
+    Out << '\n';
+  }
+  
+public:
+  RecordLayoutDumper() : Out(llvm::errs()) {}
+  
+  void HandleTranslationUnit(ASTContext &C) {
+    for (ASTContext::type_iterator I = C.types_begin(), E = C.types_end(); 
+         I != E; ++I) {
+      const RecordType *RT = dyn_cast<RecordType>(*I);
+      if (!RT)
+        continue;
+      
+      const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl());
+      if (!RD)
+        continue;
+      
+      if (RD->isImplicit())
+        continue;
+
+      // FIXME: Do we really need to hard code this?
+      if (RD->getQualifiedNameAsString() == "__va_list_tag")
+        continue;
+      
+      DumpRecordLayout(RD, C);
+   }
+  }
+};
+} // end anonymous namespace
+ASTConsumer *clang::CreateRecordLayoutDumper() {
+  return new RecordLayoutDumper();
+}
+
 //===----------------------------------------------------------------------===//
 /// InheritanceViewer - C++ Inheritance Visualization
 

clang/tools/clang-cc/clang-cc.cpp

@@ -138,6 +138,7 @@ enum ProgActions {
   ASTDump,                      // Parse ASTs and dump them.
   ASTView,                      // Parse ASTs and view them in Graphviz.
   PrintDeclContext,             // Print DeclContext and their Decls.
+  DumpRecordLayouts,            // Dump record layout information.
   ParsePrintCallbacks,          // Parse and print each callback.
   ParseSyntaxOnly,              // Parse and perform semantic analysis.
   ParseNoop,                    // Parse with noop callbacks.
@@ -183,6 +184,8 @@ ProgAction(llvm::cl::desc("Choose output type:"), llvm::cl::ZeroOrMore,
                         "Build ASTs and view them with GraphViz"),
              clEnumValN(PrintDeclContext, "print-decl-contexts",
                         "Print DeclContexts and their Decls"),
+             clEnumValN(DumpRecordLayouts, "dump-record-layouts",
+                        "Dump record layout information"),
              clEnumValN(GeneratePTH, "emit-pth",
                         "Generate pre-tokenized header file"),
              clEnumValN(GeneratePCH, "emit-pch",
@@ -1774,6 +1777,9 @@ static ASTConsumer *CreateConsumerAction(Preprocessor &PP,
   case PrintDeclContext:
     return CreateDeclContextPrinter();
 
+  case DumpRecordLayouts:
+    return CreateRecordLayoutDumper();
+
   case InheritanceView:
     return CreateInheritanceViewer(InheritanceViewCls);