commit e039bb1fdbba9b25523841c3b04740bb042080bd
author Sebastian Pop <spop@codeaurora.org> Mon Mar 18 19:09:49 2013 +0000
committer Sebastian Pop <spop@codeaurora.org> Mon Mar 18 19:09:49 2013 +0000
tree 182ef6a0ce2b888d8f6bc583d481fa978d2a3bbf
parent c8e3a0162b54f2eb6df17cf3f3c9f86a1d6552a5

use the canonical IV only when it exists

llvm-svn: 177306

polly/lib/CodeGen/CodeGeneration.cpp

diff --git a/polly/lib/CodeGen/CodeGeneration.cpp b/polly/lib/CodeGen/CodeGeneration.cpp
index ebe6e7e..f71e931 100644
--- a/polly/lib/CodeGen/CodeGeneration.cpp
+++ b/polly/lib/CodeGen/CodeGeneration.cpp
@@ -370,24 +370,26 @@
                                unsigned Dim, int VectorDim,
                                std::vector<ValueMapT> *VectorVMap,
                                std::vector<LoopToScevMapT> *VLTS) {
-  const PHINode *PN;
   Value *RHS;
 
   assert(!A->LHS && "Statement assignments do not have left hand side");
 
-  PN = Stmt->getInductionVariableForDimension(Dim);
   RHS = ExpGen.codegen(A->RHS, Builder.getInt64Ty());
-  RHS = Builder.CreateTruncOrBitCast(RHS, PN->getType());
-
-  if (VectorVMap)
-    (*VectorVMap)[VectorDim][PN] = RHS;
 
   const llvm::SCEV *URHS = S->getSE()->getUnknown(RHS);
   if (VLTS)
     (*VLTS)[VectorDim][Stmt->getLoopForDimension(Dim)] = URHS;
-
-  ValueMap[PN] = RHS;
   LoopToScev[Stmt->getLoopForDimension(Dim)] = URHS;
+
+  const PHINode *PN = Stmt->getInductionVariableForDimension(Dim);
+  if (PN) {
+    RHS = Builder.CreateTruncOrBitCast(RHS, PN->getType());
+
+    if (VectorVMap)
+      (*VectorVMap)[VectorDim][PN] = RHS;
+
+    ValueMap[PN] = RHS;
+  }
 }
 
 void ClastStmtCodeGen::codegenSubstitutions(