[SCEV] Introduce ScalarEvolution::getOne and getZero.
Summary:
It is fairly common to call SE->getConstant(Ty, 0) or
SE->getConstant(Ty, 1); this change makes such uses a little bit
briefer.
I've refactored the call sites I could find easily to use getZero /
getOne.
Reviewers: hfinkel, majnemer, reames
Subscribers: sanjoy, llvm-commits
Differential Revision: http://reviews.llvm.org/D12947
llvm-svn: 248362
diff --git a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
index 1055484..cb481c1 100644
--- a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
@@ -253,8 +253,7 @@
Rem->replaceAllUsesWith(Rem->getOperand(0));
else {
// (i+1) % n --> (i+1)==n?0:(i+1) if i is in [0,n).
- const SCEV *LessOne =
- SE->getMinusSCEV(S, SE->getConstant(S->getType(), 1));
+ const SCEV *LessOne = SE->getMinusSCEV(S, SE->getOne(S->getType()));
if (IsSigned && !SE->isKnownNonNegative(LessOne))
return;