ART: Optimizing compiler intrinsics

Add intrinsics infrastructure to the optimizing compiler.

Add almost all intrinsics supported by Quick to the x86-64 backend.
Further intrinsics require more assembler support.

Change-Id: I48de9b44c82886bb298d16e74e12a9506b8e8807

1 files changed, 11 insertions, 4 deletions

diff --git a/compiler/optimizing/register_allocator.cc b/compiler/optimizing/register_allocator.cc
index d2f4f9b7dc..1d155f9b5d 100644
--- a/compiler/optimizing/register_allocator.cc
+++ b/compiler/optimizing/register_allocator.cc
@@ -1217,10 +1217,17 @@ void RegisterAllocator::ConnectSiblings(LiveInterval* interval) {
         locations->SetEnvironmentAt(use->GetInputIndex(), source);
       } else {
         Location expected_location = locations->InAt(use->GetInputIndex());
-        if (expected_location.IsUnallocated()) {
-          locations->SetInAt(use->GetInputIndex(), source);
-        } else if (!expected_location.IsConstant()) {
-          AddInputMoveFor(use->GetUser(), source, expected_location);
+        // The expected (actual) location may be invalid in case the input is unused. Currently
+        // this only happens for intrinsics.
+        if (expected_location.IsValid()) {
+          if (expected_location.IsUnallocated()) {
+            locations->SetInAt(use->GetInputIndex(), source);
+          } else if (!expected_location.IsConstant()) {
+            AddInputMoveFor(use->GetUser(), source, expected_location);
+          }
+        } else {
+          DCHECK(use->GetUser()->IsInvoke());
+          DCHECK(use->GetUser()->AsInvoke()->GetIntrinsic() != Intrinsics::kNone);
         }
       }
       use = use->GetNext();