[InstSimplify] Rename SimplifyFPUnOp and SimplifyFPBinOp

Summary:
SimplifyFPBinOp is a variant of SimplifyBinOp that lets you specify
fast math flags, but the name is misleading because both functions
can simplify both FP and non-FP ops. Instead, overload SimplifyBinOp
so that you can optionally specify fast math flags.

Likewise for SimplifyFPUnOp.

Reviewers: spatel

Reviewed By: spatel

Subscribers: xbolva00, cameron.mcinally, eraman, hiraditya, haicheng, zzheng, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64902

llvm-svn: 366902
diff --git a/llvm/lib/Analysis/LoopUnrollAnalyzer.cpp b/llvm/lib/Analysis/LoopUnrollAnalyzer.cpp
index 1728b5e..762623d 100644
--- a/llvm/lib/Analysis/LoopUnrollAnalyzer.cpp
+++ b/llvm/lib/Analysis/LoopUnrollAnalyzer.cpp
@@ -78,7 +78,7 @@
   const DataLayout &DL = I.getModule()->getDataLayout();
   if (auto FI = dyn_cast<FPMathOperator>(&I))
     SimpleV =
-        SimplifyFPBinOp(I.getOpcode(), LHS, RHS, FI->getFastMathFlags(), DL);
+        SimplifyBinOp(I.getOpcode(), LHS, RHS, FI->getFastMathFlags(), DL);
   else
     SimpleV = SimplifyBinOp(I.getOpcode(), LHS, RHS, DL);