Increase sanity of integer division handling on ARM

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 073f7a1c7c2a198f94cb7e87a82fbe51b1803b0d..2033ea422b2d09530e4463712bc35a91334c5d55 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1513,6 +1513,11 @@ HValue* HUnaryMathOperation::Canonicalize() {
     // If the input is integer32 then we replace the floor instruction
     // with its input. This happens before the representation changes are
     // introduced.
+
+    // TODO(2205): The above comment is lying. All of this happens
+    // *after* representation changes are introduced. We should check
+    // for value->IsChange() and react accordingly if yes.
+
     if (value()->representation().IsInteger32()) return value();
 
 #if defined(V8_TARGET_ARCH_ARM) || defined(V8_TARGET_ARCH_IA32) || \