-/// \brief If the inlined function had a higher stack protection level than the
-/// calling function, then bump up the caller's stack protection level.
-static void AdjustCallerSSPLevel(Function *Caller, Function *Callee) {
- // If upgrading the SSP attribute, clear out the old SSP Attributes first.
- // Having multiple SSP attributes doesn't actually hurt, but it adds useless
- // clutter to the IR.
- AttrBuilder B;
- B.addAttribute(Attribute::StackProtect)
- .addAttribute(Attribute::StackProtectStrong)
- .addAttribute(Attribute::StackProtectReq);
- AttributeSet OldSSPAttr = AttributeSet::get(Caller->getContext(),
- AttributeSet::FunctionIndex,
- B);
-
- if (Callee->hasFnAttribute(Attribute::SafeStack)) {
- Caller->removeAttributes(AttributeSet::FunctionIndex, OldSSPAttr);
- Caller->addFnAttr(Attribute::SafeStack);
- } else if (Callee->hasFnAttribute(Attribute::StackProtectReq) &&
- !Caller->hasFnAttribute(Attribute::SafeStack)) {
- Caller->removeAttributes(AttributeSet::FunctionIndex, OldSSPAttr);
- Caller->addFnAttr(Attribute::StackProtectReq);
- } else if (Callee->hasFnAttribute(Attribute::StackProtectStrong) &&
- !Caller->hasFnAttribute(Attribute::SafeStack) &&
- !Caller->hasFnAttribute(Attribute::StackProtectReq)) {
- Caller->removeAttributes(AttributeSet::FunctionIndex, OldSSPAttr);
- Caller->addFnAttr(Attribute::StackProtectStrong);
- } else if (Callee->hasFnAttribute(Attribute::StackProtect) &&
- !Caller->hasFnAttribute(Attribute::SafeStack) &&
- !Caller->hasFnAttribute(Attribute::StackProtectReq) &&
- !Caller->hasFnAttribute(Attribute::StackProtectStrong))
- Caller->addFnAttr(Attribute::StackProtect);
-}
-