Revert r31326.

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
===================================================================
--- runtime/vm/flow_graph_compiler.cc	(revision 31331)
+++ runtime/vm/flow_graph_compiler.cc	(working copy)
@@ -17,7 +17,6 @@
 #include "vm/longjump.h"
 #include "vm/object_store.h"
 #include "vm/parser.h"
-#include "vm/stack_frame.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 
@@ -298,49 +297,6 @@
 }
 
 
-void FlowGraphCompiler::EmitTrySync(Instruction* instr, intptr_t try_index) {
-  ASSERT(is_optimizing());
-  Environment* env = instr->env();
-  CatchBlockEntryInstr* catch_block =
-      flow_graph().graph_entry()->GetCatchEntry(try_index);
-  const GrowableArray<Definition*>* idefs = catch_block->initial_definitions();
-
-  // Construct a ParallelMove instruction for parameters and locals. Skip the
-  // special locals exception_var and stacktrace_var since they will be filled
-  // when an exception is thrown. Constant locations are known to be the same
-  // at all instructions that may throw, and do not need to be materialized.
-
-  // Parameters first.
-  intptr_t i = 0;
-  const intptr_t num_non_copied_params = flow_graph().num_non_copied_params();
-  ParallelMoveInstr* move_instr = new ParallelMoveInstr();
-  for (; i < num_non_copied_params; ++i) {
-    if ((*idefs)[i]->IsConstant()) continue;  // Common constants
-    Location src = env->LocationAt(i);
-    intptr_t dest_index = i - num_non_copied_params;
-    Location dest = Location::StackSlot(dest_index);
-    move_instr->AddMove(dest, src);
-  }
-
-  // Process locals. Skip exception_var and stacktrace_var.
-  intptr_t local_base = kFirstLocalSlotFromFp + num_non_copied_params;
-  intptr_t ex_idx = local_base - catch_block->exception_var().index();
-  intptr_t st_idx = local_base - catch_block->stacktrace_var().index();
-  for (; i < flow_graph().variable_count(); ++i) {
-    if (i == ex_idx || i == st_idx) continue;
-    if ((*idefs)[i]->IsConstant()) continue;
-    Location src = env->LocationAt(i);
-    intptr_t dest_index = i - num_non_copied_params;
-    Location dest = Location::StackSlot(dest_index);
-    move_instr->AddMove(dest, src);
-    // Update safepoint bitmap to indicate that the target location
-    // now contains a pointer.
-    instr->locs()->stack_bitmap()->Set(dest_index, true);
-  }
-  parallel_move_resolver()->EmitNativeCode(move_instr);
-}
-
-
 intptr_t FlowGraphCompiler::StackSize() const {
   if (is_optimizing_) {
     return flow_graph_.graph_entry()->spill_slot_count();