[ExecutionEngine][MCJIT][Orc] Replace RuntimeDyld::SymbolInfo with JITSymbol.

This patch replaces RuntimeDyld::SymbolInfo with JITSymbol: A symbol class
that is capable of lazy materialization (i.e. the symbol definition needn't be
emitted until the address is requested). This can be used to support common
and weak symbols in the JIT (though this is not implemented in this patch).

For consistency, RuntimeDyld::SymbolResolver is renamed to JITSymbolResolver.

For space efficiency a new class, JITEvaluatedSymbol, is introduced that
behaves like the old RuntimeDyld::SymbolInfo - i.e. it is just a pair of an
address and symbol flags. Instances of JITEvaluatedSymbol can be used in
symbol-tables to avoid paying the space cost of the materializer.

llvm-svn: 277386

1 files changed, 5 insertions, 5 deletions

diff --git a/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h b/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h
index 30cfed6af95..2b05b117b9a 100644
--- a/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h
+++ b/llvm/examples/Kaleidoscope/BuildingAJIT/Chapter2/KaleidoscopeJIT.h
@@ -16,10 +16,10 @@
 
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
+#include "llvm/ExecutionEngine/JITSymbol.h"
 #include "llvm/ExecutionEngine/RuntimeDyld.h"
 #include "llvm/ExecutionEngine/SectionMemoryManager.h"
 #include "llvm/ExecutionEngine/Orc/CompileUtils.h"
-#include "llvm/ExecutionEngine/Orc/JITSymbol.h"
 #include "llvm/ExecutionEngine/Orc/IRCompileLayer.h"
 #include "llvm/ExecutionEngine/Orc/IRTransformLayer.h"
 #include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
@@ -72,14 +72,14 @@ public:
     auto Resolver = createLambdaResolver(
         [&](const std::string &Name) {
           if (auto Sym = OptimizeLayer.findSymbol(Name, false))
-            return Sym.toRuntimeDyldSymbol();
-          return RuntimeDyld::SymbolInfo(nullptr);
+            return Sym;
+          return JITSymbol(nullptr);
         },
         [](const std::string &Name) {
           if (auto SymAddr =
                 RTDyldMemoryManager::getSymbolAddressInProcess(Name))
-            return RuntimeDyld::SymbolInfo(SymAddr, JITSymbolFlags::Exported);
-          return RuntimeDyld::SymbolInfo(nullptr);
+            return JITSymbol(SymAddr, JITSymbolFlags::Exported);
+          return JITSymbol(nullptr);
         });
 
     // Build a singlton module set to hold our module.