make helper functions static; NFCI

llvm-svn: 258416
diff --git a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 079159b..4f79509 100644
--- a/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -953,11 +953,9 @@
   return nullptr;
 }
 
-//===----------------------------------------------------------------------===//
-// Double -> Float Shrinking Optimizations for Unary Functions like 'floor'
-
-Value *LibCallSimplifier::optimizeUnaryDoubleFP(CallInst *CI, IRBuilder<> &B,
-                                                bool CheckRetType) {
+/// Shrink double -> float for unary functions like 'floor'.
+static Value *optimizeUnaryDoubleFP(CallInst *CI, IRBuilder<> &B,
+                                    bool CheckRetType) {
   Function *Callee = CI->getCalledFunction();
   FunctionType *FT = Callee->getFunctionType();
   if (FT->getNumParams() != 1 || !FT->getReturnType()->isDoubleTy() ||
@@ -996,8 +994,8 @@
   return B.CreateFPExt(V, B.getDoubleTy());
 }
 
-// Double -> Float Shrinking Optimizations for Binary Functions like 'fmin/fmax'
-Value *LibCallSimplifier::optimizeBinaryDoubleFP(CallInst *CI, IRBuilder<> &B) {
+/// Shrink double -> float for binary functions like 'fmin/fmax'.
+static Value *optimizeBinaryDoubleFP(CallInst *CI, IRBuilder<> &B) {
   Function *Callee = CI->getCalledFunction();
   FunctionType *FT = Callee->getFunctionType();
   // Just make sure this has 2 arguments of the same FP type, which match the