Move unit test to the proper location

[twoh]

Summary

Move test/CodeGen/AArch64/reg-bank-128bit.mir to test/CodeGen/AArch64/GlobalISel/reg-bank-128bit.mir so that the test is executed only when global-isel is enabled. lit.local.cfg under test/CodeGen/AArch64/GlobalISel checks if 'global-isel' is in the available_features while the same file under test/CodeGen/AArch64 doesn't.

[davide]

LGTM.

llvm/trunk/test/CodeGen/AArch64/GlobalISel/reg-bank-128bit.mir

+# RUN: llc -mtriple=aarch64 -global-isel -run-pass=regbankselect -o - %s | FileCheck %s
+---
+name:            test_large_merge
+legalized:       true
+registers:
+body: |
+  bb.0.entry:
+    liveins: %x0, %x1, %x2
+
+    ; CHECK-LABEL: name: test_large_merge
+    ; CHECK: registers:
+    ; CHECK:       - { id: 0, class: gpr
+    ; CHECK:       - { id: 1, class: gpr
+    ; CHECK:       - { id: 2, class: gpr
+    ; CHECK:       - { id: 3, class: fpr
+    %0:_(s64) = COPY %x0
+    %1:_(s64) = COPY %x1
+    %2:_(p0) = COPY %x2
+    %3:_(s128) = G_MERGE_VALUES %0, %1
+    %d0 = COPY %3
+...

llvm/trunk/test/CodeGen/AArch64/reg-bank-128bit.mir

-# RUN: llc -mtriple=aarch64 -global-isel -run-pass=regbankselect -o - %s | FileCheck %s
----
-name:            test_large_merge
-legalized:       true
-registers:
-body: |
-  bb.0.entry:
-    liveins: %x0, %x1, %x2
-
-    ; CHECK-LABEL: name: test_large_merge
-    ; CHECK: registers:
-    ; CHECK:       - { id: 0, class: gpr
-    ; CHECK:       - { id: 1, class: gpr
-    ; CHECK:       - { id: 2, class: gpr
-    ; CHECK:       - { id: 3, class: fpr
-    %0:_(s64) = COPY %x0
-    %1:_(s64) = COPY %x1
-    %2:_(p0) = COPY %x2
-    %3:_(s128) = G_MERGE_VALUES %0, %1
-    %d0 = COPY %3
-...