MIPS64: ART Vectorizer

MIPS64 implementation which uses MSA extension. Also extended all
relevant checker tests to test MIPS64 implementation.

Test: booted MIPS64R6 in QEMU
Test: ./testrunner.py --target --optimizing -j1 in QEMU

Change-Id: I8b8a2f601076bca1925e21213db8ed1d41d79b52
diff --git a/compiler/optimizing/code_generator_mips64.h b/compiler/optimizing/code_generator_mips64.h
index 8405040..9c6b6f6 100644
--- a/compiler/optimizing/code_generator_mips64.h
+++ b/compiler/optimizing/code_generator_mips64.h
@@ -314,6 +314,9 @@
                                  uint32_t num_entries,
                                  HBasicBlock* switch_block,
                                  HBasicBlock* default_block);
+  int32_t VecAddress(LocationSummary* locations,
+                     size_t size,
+                     /* out */ GpuRegister* adjusted_base);
 
   Mips64Assembler* const assembler_;
   CodeGeneratorMIPS64* const codegen_;