Promote pointer to dex cache arrays on arm.

Do the use-count analysis on temps (ArtMethod* and the new
PC-relative temp) in Mir2Lir, rather than MIRGraph. MIRGraph
isn't really supposed to know how the ArtMethod* is used by
the backend.

Change-Id: Iaf56a46ae203eca86281b02b54f39a80fe5cc2dd
diff --git a/compiler/dex/quick/codegen_util.cc b/compiler/dex/quick/codegen_util.cc
index f944c11..c51046e 100644
--- a/compiler/dex/quick/codegen_util.cc
+++ b/compiler/dex/quick/codegen_util.cc
@@ -1070,6 +1070,8 @@
       mask_cache_(arena),
       safepoints_(arena->Adapter()),
       dex_cache_arrays_layout_(cu->compiler_driver->GetDexCacheArraysLayout(cu->dex_file)),
+      pc_rel_temp_(nullptr),
+      dex_cache_arrays_min_offset_(std::numeric_limits<uint32_t>::max()),
       in_to_reg_storage_mapping_(arena) {
   switch_tables_.reserve(4);
   fill_array_data_.reserve(4);