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

diff --git a/lib/Transforms/IPO/Internalize.cpp b/lib/Transforms/IPO/Internalize.cpp
index af5b9bd99e4c1402f36bc1b21ccc69ab71e02f5f..cd29e7a7a7da405f594906eedf0c58ac77a85050 100644 (file)
--- 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?