Reapply "Remove classes Computation and BindInstr."

runtime/vm/flow_graph_compiler_ia32.cc

Index: runtime/vm/flow_graph_compiler_ia32.cc
diff --git a/runtime/vm/flow_graph_compiler_ia32.cc b/runtime/vm/flow_graph_compiler_ia32.cc
index 46a73d794c7a66919065ce7f5838cabbca29fee5..4e54165a040c5b23e5749c2643ececb46b8c7c9e 100644
--- a/runtime/vm/flow_graph_compiler_ia32.cc
+++ b/runtime/vm/flow_graph_compiler_ia32.cc
@@ -604,6 +604,15 @@ void FlowGraphCompiler::EmitInstructionPrologue(Instruction* instr) {
 }
 
 
+void FlowGraphCompiler::EmitInstructionEpilogue(Instruction* instr) {
+  if (is_optimizing()) return;
+  Definition* defn = instr->AsDefinition();
+  if ((defn != NULL) && defn->is_used()) {
+    __ pushl(defn->locs()->out().reg());
+  }
+}
+
+
 void FlowGraphCompiler::CopyParameters() {
   __ Comment("Copy parameters");
   const Function& function = parsed_function().function();