[MCJIT] Add a FindGlobalVariableNamed utility

Summary: This adds FindGlobalVariableNamed to ExecutionEngine
(plus implementation in MCJIT), which is an analog of
FindFunctionNamed for GlobalVariables.

Reviewers: lhames

Reviewed By: lhames

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10421

llvm-svn: 240202

1 files changed, 25 insertions, 0 deletions

diff --git a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
index 358d364..87243e4 100644
--- a/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
+++ b/llvm/lib/ExecutionEngine/MCJIT/MCJIT.cpp
@@ -429,6 +429,19 @@ Function *MCJIT::FindFunctionNamedInModulePtrSet(const char *FnName,
   return nullptr;
 }
 
+GlobalVariable *MCJIT::FindGlobalVariableNamedInModulePtrSet(const char *Name,
+                                                             bool AllowInternal,
+                                                             ModulePtrSet::iterator I,
+                                                             ModulePtrSet::iterator E) {
+  for (; I != E; ++I) {
+    GlobalVariable *GV = (*I)->getGlobalVariable(Name, AllowInternal);
+    if (GV && !GV->isDeclaration())
+      return GV;
+  }
+  return nullptr;
+}
+
+
 Function *MCJIT::FindFunctionNamed(const char *FnName) {
   Function *F = FindFunctionNamedInModulePtrSet(
       FnName, OwnedModules.begin_added(), OwnedModules.end_added());
@@ -441,6 +454,18 @@ Function *MCJIT::FindFunctionNamed(const char *FnName) {
   return F;
 }
 
+GlobalVariable *MCJIT::FindGlobalVariableNamed(const char *Name, bool AllowInternal) {
+  GlobalVariable *GV = FindGlobalVariableNamedInModulePtrSet(
+      Name, AllowInternal, OwnedModules.begin_added(), OwnedModules.end_added());
+  if (!GV)
+    GV = FindGlobalVariableNamedInModulePtrSet(Name, AllowInternal, OwnedModules.begin_loaded(),
+                                        OwnedModules.end_loaded());
+  if (!GV)
+    GV = FindGlobalVariableNamedInModulePtrSet(Name, AllowInternal, OwnedModules.begin_finalized(),
+                                        OwnedModules.end_finalized());
+  return GV;
+}
+
 GenericValue MCJIT::runFunction(Function *F, ArrayRef<GenericValue> ArgValues) {
   assert(F && "Function *F was null at entry to run()");