Remove unused field.

[oota-llvm.git] / lib / Transforms / IPO / ExtractGV.cpp

diff --git a/lib/Transforms/IPO/ExtractGV.cpp b/lib/Transforms/IPO/ExtractGV.cpp
index 45c5fe76ba7c56704df9811fc7681e18c7e8fa6a..f8d0491bf87d2fef97fe4ac5c9fdae59c163492a 100644 (file)
--- a/lib/Transforms/IPO/ExtractGV.cpp
+++ b/lib/Transforms/IPO/ExtractGV.cpp
@@ -11,13 +11,13 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Transforms/IPO.h"
+#include "llvm/ADT/SetVector.h"
+#include "llvm/Constants.h"
 #include "llvm/Instructions.h"
 #include "llvm/LLVMContext.h"
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
-#include "llvm/Constants.h"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/ADT/SetVector.h"
 #include <algorithm>
 using namespace llvm;
 
@@ -50,24 +50,77 @@ namespace {
 
       // Visit the GlobalVariables.
       for (Module::global_iterator I = M.global_begin(), E = M.global_end();
-           I != E; ++I)
-        if (!I->isDeclaration()) {
-          if (I->hasLocalLinkage())
-            I->setVisibility(GlobalValue::HiddenVisibility);
-          I->setLinkage(GlobalValue::ExternalLinkage);
-          if (deleteStuff == Named.count(I))
-            I->setInitializer(0);
+           I != E; ++I) {
+        bool Delete =
+          deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
+        if (!Delete) {
+          if (I->hasAvailableExternallyLinkage())
+            continue;
+          if (I->getName() == "llvm.global_ctors")
+            continue;
         }
 
+        bool Local = I->hasLocalLinkage();
+        if (Local)
+          I->setVisibility(GlobalValue::HiddenVisibility);
+
+        if (Local || Delete)
+          I->setLinkage(GlobalValue::ExternalLinkage);
+
+        if (Delete)
+          I->setInitializer(0);
+      }
+
       // Visit the Functions.
-      for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
-        if (!I->isDeclaration()) {
-          if (I->hasLocalLinkage())
-            I->setVisibility(GlobalValue::HiddenVisibility);
+      for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+        bool Delete =
+          deleteStuff == (bool)Named.count(I) && !I->isDeclaration();
+        if (!Delete) {
+          if (I->hasAvailableExternallyLinkage())
+            continue;
+        }
+
+        bool Local = I->hasLocalLinkage();
+        if (Local)
+          I->setVisibility(GlobalValue::HiddenVisibility);
+
+        if (Local || Delete)
           I->setLinkage(GlobalValue::ExternalLinkage);
-          if (deleteStuff == Named.count(I))
-            I->deleteBody();
+
+        if (Delete)
+          I->deleteBody();
+      }
+
+      // Visit the Aliases.
+      for (Module::alias_iterator I = M.alias_begin(), E = M.alias_end();
+           I != E;) {
+        Module::alias_iterator CurI = I;
+        ++I;
+
+        if (CurI->hasLocalLinkage()) {
+          CurI->setVisibility(GlobalValue::HiddenVisibility);
+          CurI->setLinkage(GlobalValue::ExternalLinkage);
+        }
+
+        if (deleteStuff == (bool)Named.count(CurI)) {
+          Type *Ty =  CurI->getType()->getElementType();
+
+          CurI->removeFromParent();
+          llvm::Value *Declaration;
+          if (FunctionType *FTy = dyn_cast<FunctionType>(Ty)) {
+            Declaration = Function::Create(FTy, GlobalValue::ExternalLinkage,
+                                           CurI->getName(), &M);
+
+          } else {
+            Declaration =
+              new GlobalVariable(M, Ty, false, GlobalValue::ExternalLinkage,
+                                 0, CurI->getName());
+
+          }
+          CurI->replaceAllUsesWith(Declaration);
+          delete CurI;
         }
+      }
 
       return true;
     }