Added pass framework

The patch adds a Middle-End pass system and normalizes the current
 passes into the pass framework.

Passes have:
 - A start, work, and end functions.
 - A gate to determine to apply the pass.
 - Can provide a CFG dump folder.

mir_dataflow.cc, mir_graph.cc, mir_optimization.cc, ssa_transformation.cc:
 - Changed due to moving code into bb_optimizations.cc.
 - Moved certain functions from private to public due to needed from the passes.

pass.cc, pass.h:
 - Pass base class

pass_driver.cc, pass_driver.h:
 - The pass driver implementation.

frontend.cc:
 - Replace the function calls to the passes with the pass driver.

Change-Id: I88cd82efbf6499df9e6c7f135d7e294dd724a079
Signed-off-by: Jean Christophe Beyler <jean.christophe.beyler@intel.com>

1 files changed, 0 insertions, 42 deletions

diff --git a/compiler/dex/ssa_transformation.cc b/compiler/dex/ssa_transformation.cc
index 0d8bd07f40..502df1e9e9 100644
--- a/compiler/dex/ssa_transformation.cc
+++ b/compiler/dex/ssa_transformation.cc
@@ -669,46 +669,4 @@ void MIRGraph::DoDFSPreOrderSSARename(BasicBlock* block) {
   return;
 }
 
-/* Perform SSA transformation for the whole method */
-void MIRGraph::SSATransformation() {
-  /* Compute the DFS order */
-  ComputeDFSOrders();
-
-  /* Compute the dominator info */
-  ComputeDominators();
-
-  /* Allocate data structures in preparation for SSA conversion */
-  CompilerInitializeSSAConversion();
-
-  /* Find out the "Dalvik reg def x block" relation */
-  ComputeDefBlockMatrix();
-
-  /* Insert phi nodes to dominance frontiers for all variables */
-  InsertPhiNodes();
-
-  /* Rename register names by local defs and phi nodes */
-  ClearAllVisitedFlags();
-  DoDFSPreOrderSSARename(GetEntryBlock());
-
-  /*
-   * Shared temp bit vector used by each block to count the number of defs
-   * from all the predecessor blocks.
-   */
-  temp_ssa_register_v_ =
-      new (arena_) ArenaBitVector(arena_, GetNumSSARegs(), false, kBitMapTempSSARegisterV);
-
-  /* Insert phi-operands with latest SSA names from predecessor blocks */
-  PreOrderDfsIterator iter2(this);
-  for (BasicBlock* bb = iter2.Next(); bb != NULL; bb = iter2.Next()) {
-    InsertPhiNodeOperands(bb);
-  }
-
-  if (cu_->enable_debug & (1 << kDebugDumpCFG)) {
-    DumpCFG("/sdcard/3_post_ssa_cfg/", false);
-  }
-  if (cu_->enable_debug & (1 << kDebugVerifyDataflow)) {
-    VerifyDataflow();
-  }
-}
-
 }  // namespace art