[ORC][JITLink] Name in-memory compiled objects after their source modules.

In-memory compiled object buffer identifiers will now be derived from the
identifiers of their source IR modules. This makes it easier to connect
in-memory objects with their source modules in debugging output.

llvm-svn: 359613

2 files changed, 5 insertions, 3 deletions

diff --git a/llvm/include/llvm/ExecutionEngine/Orc/CompileUtils.h b/llvm/include/llvm/ExecutionEngine/Orc/CompileUtils.h
index 15a65667813..28a825b39c7 100644
--- a/llvm/include/llvm/ExecutionEngine/Orc/CompileUtils.h
+++ b/llvm/include/llvm/ExecutionEngine/Orc/CompileUtils.h
@@ -67,8 +67,9 @@ public:
       PM.run(M);
     }
 
-    auto ObjBuffer =
-        llvm::make_unique<SmallVectorMemoryBuffer>(std::move(ObjBufferSV));
+    auto ObjBuffer = llvm::make_unique<SmallVectorMemoryBuffer>(
+        std::move(ObjBufferSV),
+        "<in memory object compiled from " + M.getModuleIdentifier() + ">");
     auto Obj =
         object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
 
diff --git a/llvm/lib/ExecutionEngine/JITLink/MachO.cpp b/llvm/lib/ExecutionEngine/JITLink/MachO.cpp
index 8755eeccebb..15995b8ce98 100644
--- a/llvm/lib/ExecutionEngine/JITLink/MachO.cpp
+++ b/llvm/lib/ExecutionEngine/JITLink/MachO.cpp
@@ -41,7 +41,8 @@ void jitLink_MachO(std::unique_ptr<JITLinkContext> Ctx) {
   memcpy(&Magic, Data.data(), sizeof(uint32_t));
   LLVM_DEBUG({
     dbgs() << "jitLink_MachO: magic = " << format("0x%08" PRIx32, Magic)
-           << "\n";
+           << ", identifier = \""
+           << Ctx->getObjectBuffer().getBufferIdentifier() << "\"\n";
   });
 
   if (Magic == MachO::MH_MAGIC || Magic == MachO::MH_CIGAM) {