Factor out duplicated code for reusing and inserting casts into

a helper function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106388 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/include/llvm/Analysis/ScalarEvolutionExpander.h b/include/llvm/Analysis/ScalarEvolutionExpander.h
index 656219d322..9501555aac 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpander.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpander.h
@@ -128,6 +128,14 @@ namespace llvm {
     /// of work to avoid inserting an obviously redundant operation.
     Value *InsertBinop(Instruction::BinaryOps Opcode, Value *LHS, Value *RHS);
 
+    /// ReuseOrCreateCast - Arange for there to be a cast of V to Ty at IP,
+    /// reusing an existing cast if a suitable one exists, moving an existing
+    /// cast if a suitable one exists but isn't in the right place, or
+    /// or creating a new one.
+    Value *ReuseOrCreateCast(Value *V, const Type *Ty,
+                             Instruction::CastOps Op,
+                             BasicBlock::iterator IP);
+
     /// InsertNoopCastOfTo - Insert a cast of V to the specified type,
     /// which must be possible with a noop cast, doing what we can to
     /// share the casts.