[IRReader] Expose getLazyIRModule
Currently there is no way to lazy-load an in-memory IR module without
first writing it to disk. This patch just exposes the existing
implementation of getLazyIRModule.
This is effectively a revert of rL212364
Differential Revision: https://reviews.llvm.org/D56203
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353755 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/IRReader/IRReader.h b/include/llvm/IRReader/IRReader.h
index e021370..0517130 100644
--- a/include/llvm/IRReader/IRReader.h
+++ b/include/llvm/IRReader/IRReader.h
@@ -20,11 +20,22 @@
namespace llvm {
class StringRef;
+class MemoryBuffer;
class MemoryBufferRef;
class Module;
class SMDiagnostic;
class LLVMContext;
+/// If the given MemoryBuffer holds a bitcode image, return a Module
+/// for it which does lazy deserialization of function bodies. Otherwise,
+/// attempt to parse it as LLVM Assembly and return a fully populated
+/// Module. The ShouldLazyLoadMetadata flag is passed down to the bitcode
+/// reader to optionally enable lazy metadata loading. This takes ownership
+/// of \p Buffer.
+std::unique_ptr<Module> getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer,
+ SMDiagnostic &Err, LLVMContext &Context,
+ bool ShouldLazyLoadMetadata = false);
+
/// If the given file holds a bitcode image, return a Module
/// for it which does lazy deserialization of function bodies. Otherwise,
/// attempt to parse it as LLVM Assembly and return a fully populated
diff --git a/lib/IRReader/IRReader.cpp b/lib/IRReader/IRReader.cpp
index ec4422b..7ca6c2f 100644
--- a/lib/IRReader/IRReader.cpp
+++ b/lib/IRReader/IRReader.cpp
@@ -29,9 +29,9 @@
static const char *const TimeIRParsingName = "parse";
static const char *const TimeIRParsingDescription = "Parse IR";
-static std::unique_ptr<Module>
-getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
- LLVMContext &Context, bool ShouldLazyLoadMetadata) {
+std::unique_ptr<Module>
+llvm::getLazyIRModule(std::unique_ptr<MemoryBuffer> Buffer, SMDiagnostic &Err,
+ LLVMContext &Context, bool ShouldLazyLoadMetadata) {
if (isBitcode((const unsigned char *)Buffer->getBufferStart(),
(const unsigned char *)Buffer->getBufferEnd())) {
Expected<std::unique_ptr<Module>> ModuleOrErr = getOwningLazyBitcodeModule(
