Avoid creating canonical induction variables for non-native types.

For example, on 32-bit architecture, don't promote all uses of the IV
to 64-bits just because one use is a 64-bit cast.
Alternate implementation of the patch by Arnaud de Grandmaison.

llvm-svn: 127884

1 files changed, 2 insertions, 0 deletions

diff --git a/llvm/include/llvm/Analysis/IVUsers.h b/llvm/include/llvm/Analysis/IVUsers.h
index 578e6aba833..e56d24d583d 100644
--- a/llvm/include/llvm/Analysis/IVUsers.h
+++ b/llvm/include/llvm/Analysis/IVUsers.h
@@ -28,6 +28,7 @@ class IVUsers;
 class ScalarEvolution;
 class SCEV;
 class IVUsers;
+class TargetData;
 
 /// IVStrideUse - Keep track of one use of a strided induction variable.
 /// The Expr member keeps track of the expression, User is the actual user
@@ -122,6 +123,7 @@ class IVUsers : public LoopPass {
   LoopInfo *LI;
   DominatorTree *DT;
   ScalarEvolution *SE;
+  TargetData *TD;
   SmallPtrSet<Instruction*,16> Processed;
 
   /// IVUses - A list of all tracked IV uses of induction variable expressions