diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 4365adc..94c9d9b 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -2464,8 +2464,9 @@
     // computation of some other indvar to decide when to terminate the loop.
     OptimizeIndvars(L);
 
-    // FIXME: We can widen subreg IV's here for RISC targets.  e.g. instead of
-    // doing computation in byte values, promote to 32-bit values if safe.
+    // FIXME: We can widen overlarge IV's here.  e.g. if the code has
+    // computation in i64 values and the target doesn't support i64, demote
+    // the computation to 32-bit if safe.
 
     // FIXME: Attempt to reuse values across multiple IV's.  In particular, we
     // could have something like "for(i) { foo(i*8); bar(i*16) }", which should