[CodeView] Teach clang to emit the .debug$H COFF section.

Currently this is an LLVM extension to the COFF spec which is
experimental and intended to speed up linking.  For now it is
behind a hidden cl::opt flag, but in the future we can move it
to a "real" cc1 flag and have the driver pass it through whenever
it is appropriate.

The patch to actually make use of this section in lld will come
in a followup.

Differential Revision: https://reviews.llvm.org/D40917

llvm-svn: 320649

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
index 663b9b50c9d..69e93640d7e 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/CodeViewDebug.h
@@ -23,7 +23,7 @@
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/DebugInfo/CodeView/CodeView.h"
-#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
+#include "llvm/DebugInfo/CodeView/GlobalTypeTableBuilder.h"
 #include "llvm/DebugInfo/CodeView/TypeIndex.h"
 #include "llvm/IR/DebugLoc.h"
 #include "llvm/Support/Allocator.h"
@@ -52,7 +52,7 @@ class MachineFunction;
 class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
   MCStreamer &OS;
   BumpPtrAllocator Allocator;
-  codeview::MergingTypeTableBuilder TypeTable;
+  codeview::GlobalTypeTableBuilder TypeTable;
 
   /// Represents the most general definition range.
   struct LocalVarDefRange {
@@ -219,6 +219,8 @@ class LLVM_LIBRARY_VISIBILITY CodeViewDebug : public DebugHandlerBase {
 
   void emitTypeInformation();
 
+  void emitTypeGlobalHashes();
+
   void emitCompilerInformation();
 
   void emitInlineeLinesSubsection();