Add a comment about how Imm can be used for loop-variant values.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65147 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 1edd10e..e3f7fbd 100644
--- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -666,7 +666,8 @@
/// Imm - The immediate value that should be added to the base immediately
/// before Inst, because it will be folded into the imm field of the
- /// instruction.
+ /// instruction. This is also sometimes used for loop-variant values that
+ /// must be added inside the loop.
SCEVHandle Imm;
/// Phi - The induction variable that performs the striding that