From 6e801dc6c0a7b04e154f5fbb3a2b04cc355d194d Mon Sep 17 00:00:00 2001 From: Nick Lewycky Date: Tue, 20 Nov 2007 08:44:50 +0000 Subject: [PATCH] Small cleanup. Use APInt::getHighBitsSet method instead of shift left. "setcc" -> "icmp op" in comments. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44249 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/ScalarEvolution.cpp | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index e7bb9ab80c2..fed57f9d917 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -1207,7 +1207,7 @@ namespace { SCEVHandle ComputeIterationCount(const Loop *L); /// ComputeLoadConstantCompareIterationCount - Given an exit condition of - /// 'setcc load X, cst', try to see if we can compute the trip count. + /// 'icmp op load X, cst', try to see if we can compute the trip count. SCEVHandle ComputeLoadConstantCompareIterationCount(LoadInst *LI, Constant *RHS, const Loop *L, @@ -1418,13 +1418,12 @@ static APInt GetConstantFactor(SCEVHandle S) { if (!V.isMinValue()) return V; else // Zero is a multiple of everything. - return APInt(C->getBitWidth(), 1).shl(C->getBitWidth()-1); + return APInt::getHighBitsSet(C->getBitWidth(), 1); } - if (SCEVTruncateExpr *T = dyn_cast(S)) { + if (SCEVTruncateExpr *T = dyn_cast(S)) return GetConstantFactor(T->getOperand()).trunc( cast(T->getType())->getBitWidth()); - } if (SCEVZeroExtendExpr *E = dyn_cast(S)) return GetConstantFactor(E->getOperand()).zext( cast(E->getType())->getBitWidth()); @@ -1787,7 +1786,7 @@ GetAddressedElementFromGlobal(GlobalVariable *GV, } /// ComputeLoadConstantCompareIterationCount - Given an exit condition of -/// 'setcc load X, cst', try to se if we can compute the trip count. +/// 'icmp op load X, cst', try to se if we can compute the trip count. SCEVHandle ScalarEvolutionsImpl:: ComputeLoadConstantCompareIterationCount(LoadInst *LI, Constant *RHS, const Loop *L,