From 0c337ed63ff0f04fd8315afabb2d7a51969fdc97 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Tue, 12 May 2009 21:02:27 +0000
Subject: [PATCH] add an initial stab at emitting deferred c++ inline
 functions.  This handles static functions and methods declared inline, but
 not ctors/dtors or methods not declared inline (apparently my previous patch
 wasn't good enough).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71591 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CodeGenModule.cpp        |  9 +++++++++
 test/CodeGenCXX/member-functions.cpp | 28 ++++++++++++++++++++++++++--
 2 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index c2dc629680..6e4a67b917 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -606,6 +606,15 @@ llvm::Constant *CodeGenModule::GetOrCreateLLVMFunction(const char *MangledName,
     // list, and remove it from DeferredDecls (since we don't need it anymore).
     DeferredDeclsToEmit.push_back(DDI->second);
     DeferredDecls.erase(DDI);
+  } else if (D && D->isThisDeclarationADefinition() && MayDeferGeneration(D)) {
+    // If this the first reference to a C++ inline function in a class, queue up
+    // the deferred function body for emission.  These are not seen as
+    // top-level declarations.
+    // FIXME: Make this work for ctor/dtors.  We need to pass down a full
+    // GlobalDecl instead of just a FunctionDecl.
+    if (!isa<CXXConstructorDecl>(D) &&
+        !isa<CXXDestructorDecl>(D))
+    DeferredDeclsToEmit.push_back(GlobalDecl(D));
   }
   
   // This function doesn't have a complete type (for example, the return
diff --git a/test/CodeGenCXX/member-functions.cpp b/test/CodeGenCXX/member-functions.cpp
index 9cdab0a662..83278909ea 100644
--- a/test/CodeGenCXX/member-functions.cpp
+++ b/test/CodeGenCXX/member-functions.cpp
@@ -8,12 +8,36 @@ struct C {
 void C::f() {
 }
 
-void f() {
+void test1() {
   C c;
   
 // RUN: grep "call void @_ZN1C1fEv" %t | count 1 &&
   c.f();
   
-// RUN: grep "call void (.struct.C\*, i32, ...)\* @_ZN1C1gEiz" %t | count 1
+// RUN: grep "call void (.struct.C\*, i32, ...)\* @_ZN1C1gEiz" %t | count 1 &&
   c.g(1, 2, 3);
 }
+
+
+struct S {
+  S() { }
+  ~S() { }
+  
+  
+  void f_inline1() { }
+  // RUN: grep "define linkonce_odr void @_ZN1S9f_inline2Ev" %t &&
+  inline void f_inline2() { }
+  
+  // RUN: grep "define internal void @_ZN1S1gEv" %t
+  static void g() { }
+};
+
+void test2() {
+  S s;
+  
+  s.f_inline1();
+  s.f_inline2();
+  
+  S::g();
+  
+}
-- 
2.40.0