[stackprotector] Refactor out the end of isInTailCallPosition into the function returnTypeIsEligibleForTailCall.
This allows me to use returnTypeIsEligibleForTailCall in the stack protector pass.
rdar://13935163
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Analysis.cpp b/lib/CodeGen/Analysis.cpp
index 332a042..1600c67 100644
--- a/lib/CodeGen/Analysis.cpp
+++ b/lib/CodeGen/Analysis.cpp
@@ -510,6 +510,13 @@
return false;
}
+ return returnTypeIsEligibleForTailCall(ExitBB->getParent(), I, Ret, TLI);
+}
+
+bool llvm::returnTypeIsEligibleForTailCall(const Function *F,
+ const Instruction *I,
+ const ReturnInst *Ret,
+ const TargetLoweringBase &TLI) {
// If the block ends with a void return or unreachable, it doesn't matter
// what the call's return type is.
if (!Ret || Ret->getNumOperands() == 0) return true;
@@ -519,7 +526,7 @@
if (isa<UndefValue>(Ret->getOperand(0))) return true;
// Make sure the attributes attached to each return are compatible.
- AttrBuilder CallerAttrs(ExitBB->getParent()->getAttributes(),
+ AttrBuilder CallerAttrs(F->getAttributes(),
AttributeSet::ReturnIndex);
AttrBuilder CalleeAttrs(cast<CallInst>(I)->getAttributes(),
AttributeSet::ReturnIndex);