Simplify expressions involving boolean constants with clang-tidy

Patch by Richard (legalize at xmission dot com).

Differential Revision: http://reviews.llvm.org/D8154

llvm-svn: 231617
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index 81a149a..bcdfec7 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -4466,8 +4466,7 @@
 /// FIXME: Remove the (equivalent?) implementation in SelectionDAG.
 ///
 bool CodeGenPrepare::splitBranchCondition(Function &F) {
-  if (!TM || TM->Options.EnableFastISel != true ||
-      !TLI || TLI->isJumpExpensive())
+  if (!TM || !TM->Options.EnableFastISel || !TLI || TLI->isJumpExpensive())
     return false;
 
   bool MadeChange = false;