Make helper functions static.

llvm-svn: 212460
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
index c18ed2d..99f0f1f 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
@@ -961,8 +961,8 @@
 //   ADD(XOR(OR(Z, NOT(C)), C)), 1) == NEG(AND(Z, C))
 //   ADD(XOR(AND(Z, C), C), 1) == NEG(OR(Z, ~C))
 //   XOR(AND(Z, C), (C + 1)) == NEG(OR(Z, ~C)) if C is even
-Value *checkForNegativeOperand(BinaryOperator &I,
-                               InstCombiner::BuilderTy *Builder) {
+static Value *checkForNegativeOperand(BinaryOperator &I,
+                                      InstCombiner::BuilderTy *Builder) {
   Value *LHS = I.getOperand(0), *RHS = I.getOperand(1);
 
   // This function creates 2 instructions to replace ADD, we need at least one
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index 88d461e..6cba8e3 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -411,8 +411,8 @@
 
 /// This function factors binary ops which can be combined using distributive
 /// laws. This also factor SHL as MUL e.g. SHL(X, 2) ==> MUL(X, 4).
-Instruction::BinaryOps getBinOpsForFactorization(BinaryOperator *Op,
-                                                 Value *&LHS, Value *&RHS) {
+static Instruction::BinaryOps
+getBinOpsForFactorization(BinaryOperator *Op, Value *&LHS, Value *&RHS) {
   if (!Op)
     return Instruction::BinaryOpsEnd;