[optimizing] Add basic PackedSwitch support

Add HPackedSwitch, and generate it from the builder.  Code generators
convert this to a series of compare/branch tests.  Better implementation
in the code generators as a real jump table will follow as separate CLs.

Change-Id: If14736fa4d62809b6ae95280148c55682e856911
Signed-off-by: Mark Mendell <mark.p.mendell@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/compiler/optimizing/register_allocator.cc b/compiler/optimizing/register_allocator.cc
index a4f1f458fd..9594e3b8e1 100644
--- a/compiler/optimizing/register_allocator.cc
+++ b/compiler/optimizing/register_allocator.cc
@@ -1528,10 +1528,10 @@ void RegisterAllocator::InsertParallelMoveAtExitOf(HBasicBlock* block,
   DCHECK_EQ(block->NumberOfNormalSuccessors(), 1u);
   HInstruction* last = block->GetLastInstruction();
   // We insert moves at exit for phi predecessors and connecting blocks.
-  // A block ending with an if cannot branch to a block with phis because
-  // we do not allow critical edges. It can also not connect
+  // A block ending with an if or a packed switch cannot branch to a block
+  // with phis because we do not allow critical edges. It can also not connect
   // a split interval between two blocks: the move has to happen in the successor.
-  DCHECK(!last->IsIf());
+  DCHECK(!last->IsIf() && !last->IsPackedSwitch());
   HInstruction* previous = last->GetPrevious();
   HParallelMove* move;
   // This is a parallel move for connecting blocks. We need to differentiate