commit 880e8c0ad41345f353b819c51092baa8f05e1950
author Lang Hames <lhames@gmail.com> Mon Mar 04 22:40:44 2013 +0000
committer Lang Hames <lhames@gmail.com> Mon Mar 04 22:40:44 2013 +0000
tree cc1c3b1b23a1d95e11f0d324c7d2a2d4f20e5502
parent 1ae08e007784a0708d6dae9c37b84bb62d5e1282

Check isDiscardableIfUnused, rather than hasLocalLinkage, when bumping
GlobalValue linkage up to ExternalLinkage in the ExtractGV pass. This
prevents linkonce and linkonce_odr symbols from being DCE'd.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176459 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/IPO/ExtractGV.cpp

diff --git a/lib/Transforms/IPO/ExtractGV.cpp b/lib/Transforms/IPO/ExtractGV.cpp
index 8a6bfc6..fa3d72d 100644
--- a/lib/Transforms/IPO/ExtractGV.cpp
+++ b/lib/Transforms/IPO/ExtractGV.cpp
@@ -60,7 +60,7 @@
             continue;
         }
 
-        bool Local = I->hasLocalLinkage();
+        bool Local = I->isDiscardableIfUnused();
         if (Local)
           I->setVisibility(GlobalValue::HiddenVisibility);
 
@@ -80,7 +80,7 @@
             continue;
         }
 
-        bool Local = I->hasLocalLinkage();
+        bool Local = I->isDiscardableIfUnused();
         if (Local)
           I->setVisibility(GlobalValue::HiddenVisibility);
 
@@ -97,7 +97,7 @@
         Module::alias_iterator CurI = I;
         ++I;
 
-        if (CurI->hasLocalLinkage()) {
+        if (CurI->isDiscardableIfUnused()) {
           CurI->setVisibility(GlobalValue::HiddenVisibility);
           CurI->setLinkage(GlobalValue::ExternalLinkage);
         }