[InstCombine/InstSimplify] add comments about code duplication; NFC

llvm-svn: 302436

2 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index 4e7f2ebf5dd..66a1e745171 100644
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -2535,6 +2535,9 @@ static Value *simplifyICmpWithConstant(CmpInst::Predicate Pred, Value *LHS,
   return nullptr;
 }
 
+/// TODO: A large part of this logic is duplicated in InstCombine's
+/// foldICmpBinOp(). We should be able to share that and avoid the code
+/// duplication.
 static Value *simplifyICmpWithBinOp(CmpInst::Predicate Pred, Value *LHS,
                                     Value *RHS, const SimplifyQuery &Q,
                                     unsigned MaxRecurse) {
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 34ce235b3fe..d71d0c1c078 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -2785,6 +2785,9 @@ Instruction *InstCombiner::foldICmpInstWithConstantNotInt(ICmpInst &I) {
 }
 
 /// Try to fold icmp (binop), X or icmp X, (binop).
+/// TODO: A large part of this logic is duplicated in InstSimplify's
+/// simplifyICmpWithBinOp(). We should be able to share that and avoid the code
+/// duplication.
 Instruction *InstCombiner::foldICmpBinOp(ICmpInst &I) {
   Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);