Bitcode: Decouple block info block state from reader.

As proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/106630.html

Move block info block state to a new class, BitstreamBlockInfo.
Clients may set the block info for a particular cursor with the
BitstreamCursor::setBlockInfo() method.

At this point BitstreamReader is not much more than a container for an
ArrayRef<uint8_t>, so remove it and replace all uses with direct uses
of memory buffers.

Differential Revision: https://reviews.llvm.org/D26259

llvm-svn: 286207

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/lib/Frontend/PCHContainerOperations.cpp b/clang/lib/Frontend/PCHContainerOperations.cpp
index 2c867e7..eebebf3 100644
--- a/clang/lib/Frontend/PCHContainerOperations.cpp
+++ b/clang/lib/Frontend/PCHContainerOperations.cpp
@@ -58,9 +58,9 @@ std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator(
   return llvm::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer);
 }
 
-void RawPCHContainerReader::ExtractPCH(
-    llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const {
-  StreamFile = llvm::BitstreamReader(Buffer);
+StringRef
+RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
+  return Buffer.getBuffer();
 }
 
 PCHContainerOperations::PCHContainerOperations() {