Desugar bitwise negation into XOR and kill all UnaryOp stuff.

src/hydrogen-uint32-analysis.cc

Index: src/hydrogen-uint32-analysis.cc
diff --git a/src/hydrogen-uint32-analysis.cc b/src/hydrogen-uint32-analysis.cc
index 67219f55dff778f78e9c4a02205cf6064ebdfe64..835a198d4d8b53f42d06542806f3381116ea1869 100644
--- a/src/hydrogen-uint32-analysis.cc
+++ b/src/hydrogen-uint32-analysis.cc
@@ -33,11 +33,7 @@ namespace internal {
 
 bool HUint32AnalysisPhase::IsSafeUint32Use(HValue* val, HValue* use) {
   // Operations that operate on bits are safe.
-  if (use->IsBitwise() ||
-      use->IsShl() ||
-      use->IsSar() ||
-      use->IsShr() ||
-      use->IsBitNot()) {
+  if (use->IsBitwise() || use->IsShl() || use->IsSar() || use->IsShr()) {
     return true;
   } else if (use->IsChange() || use->IsSimulate()) {
     // Conversions and deoptimization have special support for unt32.