Add a comment about a missed opportunity.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94507 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp
index bfee730db14698bedd1c1004b2ebfef80e457c93..e9ddffc06ba2caf5f08634c5b6db39ccd07d50f4 100644 (file)
--- a/lib/Support/ConstantRange.cpp
+++ b/lib/Support/ConstantRange.cpp
@@ -540,6 +540,9 @@ ConstantRange::add(const ConstantRange &Other) const {
 
 ConstantRange
 ConstantRange::multiply(const ConstantRange &Other) const {
+  // TODO: If either operand is a single element, round the result min anx
+  // max value to the appropriate multiple of that element.
+
   if (isEmptySet() || Other.isEmptySet())
     return ConstantRange(getBitWidth(), /*isFullSet=*/false);
   if (isFullSet() || Other.isFullSet())