Code-gen may inject code into the IR before it emits the ASM. The linker

obviously cannot know that this code is present, let alone used. So prevent the
internalize pass from internalizing those global values which code-gen may
insert.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154645 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Transforms/IPO/Internalize.cpp b/lib/Transforms/IPO/Internalize.cpp
index af5b9bd99e..cd29e7a7a7 100644
--- a/lib/Transforms/IPO/Internalize.cpp
+++ b/lib/Transforms/IPO/Internalize.cpp
@@ -122,6 +122,9 @@ bool InternalizePass::runOnModule(Module &M) {
 
   bool Changed = false;
 
+  // Never internalize functions which code-gen might insert.
+  ExternalNames.insert("__stack_chk_fail");
+
   // Mark all functions not in the api as internal.
   // FIXME: maybe use private linkage?
   for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
@@ -150,6 +153,9 @@ bool InternalizePass::runOnModule(Module &M) {
   ExternalNames.insert("llvm.global_dtors");
   ExternalNames.insert("llvm.global.annotations");
 
+  // Never internalize symbols code-gen inserts.
+  ExternalNames.insert("__stack_chk_guard");
+
   // Mark all global variables with initializers that are not in the api as
   // internal as well.
   // FIXME: maybe use private linkage?