Revert "Revert "ARM: VIXL32: Use VIXL backend by default.""

bug:35977033

This reverts commit 25275bef429dc6a48b79411e0d0b32207294523b.

Change-Id: I440bf8415e2bf550607595499701fb3e7c33b37e
diff --git a/compiler/optimizing/optimizing_cfi_test.cc b/compiler/optimizing/optimizing_cfi_test.cc
index 0e02311..490e50c 100644
--- a/compiler/optimizing/optimizing_cfi_test.cc
+++ b/compiler/optimizing/optimizing_cfi_test.cc
@@ -24,17 +24,17 @@
 #include "optimizing/code_generator.h"
 #include "optimizing/optimizing_unit_test.h"
 #include "utils/assembler.h"
-#ifdef ART_USE_VIXL_ARM_BACKEND
-#include "utils/arm/assembler_arm_vixl.h"
-#else
+#ifdef ART_USE_OLD_ARM_BACKEND
 #include "utils/arm/assembler_thumb2.h"
+#else
+#include "utils/arm/assembler_arm_vixl.h"
 #endif
 #include "utils/mips/assembler_mips.h"
 #include "utils/mips64/assembler_mips64.h"
 
 #include "optimizing/optimizing_cfi_test_expected.inc"
 
-#ifdef ART_USE_VIXL_ARM_BACKEND
+#ifndef ART_USE_OLD_ARM_BACKEND
 namespace vixl32 = vixl::aarch32;
 
 using vixl32::r0;
@@ -196,7 +196,15 @@
       expected_cfi_kThumb2_adjust,
       expected_cfi_kThumb2_adjust + arraysize(expected_cfi_kThumb2_adjust));
   SetUpFrame(kThumb2);
-#ifdef ART_USE_VIXL_ARM_BACKEND
+#ifdef ART_USE_OLD_ARM_BACKEND
+#define __ down_cast<arm::Thumb2Assembler*>(GetCodeGenerator()->GetAssembler())->
+  Label target;
+  __ CompareAndBranchIfZero(arm::R0, &target);
+  // Push the target out of range of CBZ.
+  for (size_t i = 0; i != 65; ++i) {
+    __ ldr(arm::R0, arm::Address(arm::R0));
+  }
+#else
 #define __ down_cast<arm::ArmVIXLAssembler*>(GetCodeGenerator() \
     ->GetAssembler())->GetVIXLAssembler()->
   vixl32::Label target;
@@ -205,14 +213,6 @@
   for (size_t i = 0; i != 65; ++i) {
     __ Ldr(r0, vixl32::MemOperand(r0));
   }
-#else
-#define __ down_cast<arm::Thumb2Assembler*>(GetCodeGenerator()->GetAssembler())->
-  Label target;
-  __ CompareAndBranchIfZero(arm::R0, &target);
-  // Push the target out of range of CBZ.
-  for (size_t i = 0; i != 65; ++i) {
-    __ ldr(arm::R0, arm::Address(arm::R0));
-  }
 #endif
   __ Bind(&target);
 #undef __