Give sentinel traits the right to determine the policy where the sentinel is kept.
This should result in less indirect memory accesses, less dead writes and tighter code.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66061 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h
index 1371f1d..7386b2b 100644
--- a/include/llvm/CodeGen/MachineFunction.h
+++ b/include/llvm/CodeGen/MachineFunction.h
@@ -44,6 +44,11 @@
}
void destroySentinel(MachineBasicBlock *) const {}
+ MachineBasicBlock *provideInitialHead() const { return createSentinel(); }
+ MachineBasicBlock *ensureHead(MachineBasicBlock*) const {
+ return createSentinel();
+ }
+
void addNodeToList(MachineBasicBlock* MBB);
void removeNodeFromList(MachineBasicBlock* MBB);
void deleteNode(MachineBasicBlock *MBB);
@@ -363,8 +368,12 @@
// nodes_iterator/begin/end - Allow iteration over all nodes in the graph
typedef MachineFunction::const_iterator nodes_iterator;
- static nodes_iterator nodes_begin(const MachineFunction *F) { return F->begin(); }
- static nodes_iterator nodes_end (const MachineFunction *F) { return F->end(); }
+ static nodes_iterator nodes_begin(const MachineFunction *F) {
+ return F->begin();
+ }
+ static nodes_iterator nodes_end (const MachineFunction *F) {
+ return F->end();
+ }
};