[LoopIdiomRecognize] Don't create an IRBuilder just to call getTrue/getFalse.

We can call the methods in ConstantInt directly. We just need a context.

llvm-svn: 331542
diff --git a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
index 1e3bf91..5bfb44b 100644
--- a/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
@@ -1415,9 +1415,9 @@
   //  %inc = add nsw %i.0, 1
   //  br i1 %tobool
 
-  IRBuilder<> Builder(PH->getTerminator());
   const Value *Args[] =
-      {InitX, ZeroCheck ? Builder.getTrue() : Builder.getFalse()};
+      {InitX, ZeroCheck ? ConstantInt::getTrue(InitX->getContext())
+                        : ConstantInt::getFalse(InitX->getContext())};
   if (CurLoop->getHeader()->size() != 6 &&
       TTI->getIntrinsicCost(Intrinsic::ctlz, InitX->getType(), Args) >
           TargetTransformInfo::TCC_Basic)