Add a comment about how Imm can be used for loop-variant values.

llvm-svn: 65147
2009-02-20 20:29:04 +00:00 · 2009-02-20 20:29:04 +00:00 · 1608df5319
parent 2f3a3d9f7a
commit 1608df5319
1 changed files with 2 additions and 1 deletions
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@ -666,7 +666,8 @@ namespace {

    /// 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