Infrastructure classes for evaluating numeric relations between values.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 7869d71687cf5d4f2554fcc3323ee554a6a193f2..9669f6b803861228082297988d90d8cdc64e0855 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -3870,12 +3870,14 @@ void HGraph::SetupInformativeDefinitionsInBlock(HBasicBlock* block) {
   for (int phi_index = 0; phi_index < block->phis()->length(); phi_index++) {
     HPhi* phi = block->phis()->at(phi_index);
     phi->AddInformativeDefinitions();
+    phi->SetFlag(HValue::kIDefsProcessingDone);
     // We do not support phis that "redefine just one operand".
     ASSERT(!phi->IsInformativeDefinition());
   }
 
   for (HInstruction* i = block->first(); i != NULL; i = i->next()) {
     i->AddInformativeDefinitions();
+    i->SetFlag(HValue::kIDefsProcessingDone);
     i->UpdateRedefinedUsesWhileSettingUpInformativeDefinitions();
   }
 }