commit 95050fa665c51a29249725101a476de685f43a11
author Lauro Ramos Venancio <lauro.venancio@gmail.com> Tue Feb 19 00:04:15 2008 +0000
committer Lauro Ramos Venancio <lauro.venancio@gmail.com> Tue Feb 19 00:04:15 2008 +0000
tree 2271f00ba0da7b3769e7d74648641a65a1e238b7
parent 39b4c6c98d391b25c376782cf92346aa88c96f7e

A global without initializer must be emitted as weak.
Fix Olden/bh test.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47292 91177308-0d34-0410-b5e6-96231b3b80d8

CodeGen/CodeGenModule.cpp

diff --git a/CodeGen/CodeGenModule.cpp b/CodeGen/CodeGenModule.cpp
index ef05586..d68fbe6 100644
--- a/CodeGen/CodeGenModule.cpp
+++ b/CodeGen/CodeGenModule.cpp
@@ -244,6 +244,9 @@
   case VarDecl::Register:
     assert(0 && "Can't have auto or register globals");
   case VarDecl::None:
+    if (!D->getInit())
+      GV->setLinkage(llvm::GlobalVariable::WeakLinkage);
+    break;
   case VarDecl::Extern:
   case VarDecl::PrivateExtern:
     // todo: common

test/CodeGen/weak-global.c

diff --git a/test/CodeGen/weak-global.c b/test/CodeGen/weak-global.c
new file mode 100644
index 0000000..86e551c
--- /dev/null
+++ b/test/CodeGen/weak-global.c
@@ -0,0 +1,3 @@
+// RUN: clang -emit-llvm < %s | grep weak
+
+int i;