vendor/llvm/llvm-r74788

1 files changed, 7 insertions, 0 deletions

diff --git a/include/llvm/Transforms/Utils/Local.h b/include/llvm/Transforms/Utils/Local.h
index 98a68f6461bb..dd423fa3b173 100644
--- a/include/llvm/Transforms/Utils/Local.h
+++ b/include/llvm/Transforms/Utils/Local.h
@@ -19,6 +19,7 @@ namespace llvm {
 
 class User;
 class BasicBlock;
+class BranchInst;
 class Instruction;
 class Value;
 class Pass;
@@ -94,6 +95,12 @@ void MergeBasicBlockIntoOnlyPred(BasicBlock *BB);
 ///
 bool SimplifyCFG(BasicBlock *BB);
 
+/// FoldBranchToCommonDest - If this basic block is ONLY a setcc and a branch,
+/// and if a predecessor branches to us and one of our successors, fold the
+/// setcc into the predecessor and use logical operations to pick the right
+/// destination.
+bool FoldBranchToCommonDest(BranchInst *BI);
+
 /// DemoteRegToStack - This function takes a virtual register computed by an
 /// Instruction and replaces it with a slot in the stack frame, allocated via
 /// alloca.  This allows the CFG to be changed around without fear of