[PATCH] Disable indvar widening if arithmetics on the wider type are more expensive

[Jingyue Wu]

A minor clarification

================
Comment at: lib/Target/NVPTX/CMakeLists.txt:12
@@ -11,1 +11,3 @@
 set(NVPTXCodeGen_sources
+  NVPTXAllocaHoisting.cpp
+  NVPTXAsmPrinter.cpp
----------------
Added NVPTXTargetTransformInfo.cpp and sorted other entries.

http://reviews.llvm.org/D6188