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[SSP] Restore setting the visibility of __guard_local to hidden for better code generation.

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Patch by: Philip Guenther

(cherry picked from commit d870e363263835bec96c83f51b20e64722cad742)
This commit is contained in:
Brad Smith 2020-08-27 17:17:38 -04:00 committed by Hans Wennborg
parent 43b4ea8954
commit d812075793
1 changed files with 4 additions and 1 deletions
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5
lib/CodeGen/TargetLoweringBase.cpp
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@ -1827,7 +1827,10 @@ Value *TargetLoweringBase::getIRStackGuard(IRBuilder<> &IRB) const {
if (getTargetMachine().getTargetTriple().isOSOpenBSD()) {
Module &M = *IRB.GetInsertBlock()->getParent()->getParent();
PointerType *PtrTy = Type::getInt8PtrTy(M.getContext());
return M.getOrInsertGlobal("__guard_local", PtrTy);
Constant *C = M.getOrInsertGlobal("__guard_local", PtrTy);
if (GlobalVariable *G = dyn_cast_or_null<GlobalVariable>(C))
G->setVisibility(GlobalValue::HiddenVisibility);
return C;
}
return nullptr;
}