From 2e2995bf506c4f971f20235f59e0ceed45b77770 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Tue, 5 Nov 2013 21:37:29 +0000
Subject: Produce direct calls instead of alias to linkonce_odr functions.

This is a small optimization on linux, but should help more on windows
where msvc only outputs one destructor if there would be two identical ones.

llvm-svn: 194095
---
 clang/lib/CodeGen/CodeGenModule.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index c34f833..d7f33c9 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -172,6 +172,20 @@ void CodeGenModule::createCUDARuntime() {
   CUDARuntime = CreateNVCUDARuntime(*this);
 }
 
+void CodeGenModule::applyReplacements() {
+  for (ReplacementsTy::iterator I = Replacements.begin(),
+                                E = Replacements.end();
+       I != E; ++I) {
+    StringRef MangledName = I->first();
+    llvm::Constant *Replacement = I->second;
+    llvm::GlobalValue *Entry = GetGlobalValue(MangledName);
+    if (!Entry)
+      continue;
+    Entry->replaceAllUsesWith(Replacement);
+    Entry->eraseFromParent();
+  }
+}
+
 void CodeGenModule::checkAliases() {
   bool Error = false;
   for (std::vector<GlobalDecl>::iterator I = Aliases.begin(),
@@ -207,6 +221,7 @@ void CodeGenModule::checkAliases() {
 
 void CodeGenModule::Release() {
   EmitDeferred();
+  applyReplacements();
   checkAliases();
   EmitCXXGlobalInitFunc();
   EmitCXXGlobalDtorFunc();
-- 
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