InstCombine: Move (sext icmp) transforms into their own method. No intended functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128731 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstCombine.h b/lib/Transforms/InstCombine/InstCombine.h
index d5de53a..625f546 100644
--- a/lib/Transforms/InstCombine/InstCombine.h
+++ b/lib/Transforms/InstCombine/InstCombine.h
@@ -217,6 +217,7 @@
   Instruction *transformCallThroughTrampoline(CallSite CS);
   Instruction *transformZExtICmp(ICmpInst *ICI, Instruction &CI,
                                  bool DoXform = true);
+  Instruction *transformSExtICmp(ICmpInst *ICI, Instruction &CI);
   bool WillNotOverflowSignedAdd(Value *LHS, Value *RHS);
   Value *EmitGEPOffset(User *GEP);