[InstCombine] function names start with lower-case letter; NFC

Forgot to make this fix with the signature change in r300911.

llvm-svn: 300912
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
index 978c8a3..c1eeef6 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
+++ b/llvm/lib/Transforms/InstCombine/InstCombineInternal.h
@@ -551,7 +551,7 @@
                                          unsigned Depth, Instruction *CxtI);
   /// Helper routine of SimplifyDemandedUseBits. It tries to simplify demanded
   /// bit for "r1 = shr x, c1; r2 = shl r1, c2" instruction sequence.
-  Value *SimplifyShrShlDemandedBits(
+  Value *simplifyShrShlDemandedBits(
       Instruction *Shr, const APInt &ShrOp1, Instruction *Shl,
       const APInt &ShlOp1, const APInt &DemandedMask, APInt &KnownZero,
       APInt &KnownOne);