From: Dan Gohman <gohman@apple.com>
Date: Sun, 22 Jun 2008 19:23:09 +0000 (+0000)
Subject: Use SCEVAddRecExpr::isAffine.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=17f1972c770dc18f5c7c3c95776b4d62ae9e121d;p=oota-llvm.git

Use SCEVAddRecExpr::isAffine.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52614 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index e077cfe2a0f..76f4b2c28cb 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -407,7 +407,7 @@ namespace llvm {
     /// indicating how much this expression steps by.  If this is a polynomial
     /// of degree N, it returns a chrec of degree N-1.
     SCEVHandle getStepRecurrence(ScalarEvolution &SE) const {
-      if (getNumOperands() == 2) return getOperand(1);
+      if (isAffine()) return getOperand(1);
       return SE.getAddRecExpr(std::vector<SCEVHandle>(op_begin()+1,op_end()),
                               getLoop());
     }
diff --git a/lib/Analysis/ScalarEvolutionExpander.cpp b/lib/Analysis/ScalarEvolutionExpander.cpp
index 07850f77a14..593e27300d3 100644
--- a/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -147,7 +147,7 @@ Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
   }
 
   // {0,+,1} --> Insert a canonical induction variable into the loop!
-  if (S->getNumOperands() == 2 &&
+  if (S->isAffine() &&
       S->getOperand(1) == SE.getIntegerSCEV(1, Ty)) {
     // Create and insert the PHI node for the induction variable in the
     // specified loop.
@@ -178,7 +178,7 @@ Value *SCEVExpander::visitAddRecExpr(SCEVAddRecExpr *S) {
   Value *I = getOrInsertCanonicalInductionVariable(L, Ty);
 
   // If this is a simple linear addrec, emit it now as a special case.
-  if (S->getNumOperands() == 2) {   // {0,+,F} --> i*F
+  if (S->isAffine()) {   // {0,+,F} --> i*F
     Value *F = expand(S->getOperand(1));
     
     // IF the step is by one, just return the inserted IV.