Move loop invariant utility to more general place.

Change-Id: I15ebfbf9684f0fcce9e63d078ff8dc1381fd1ca3

1 files changed, 11 insertions, 0 deletions

diff --git a/compiler/optimizing/nodes.cc b/compiler/optimizing/nodes.cc
index 348026551e..8b28ff91d4 100644
--- a/compiler/optimizing/nodes.cc
+++ b/compiler/optimizing/nodes.cc
@@ -574,6 +574,17 @@ bool HLoopInformation::IsIn(const HLoopInformation& other) const {
   return other.blocks_.IsBitSet(header_->GetBlockId());
 }
 
+bool HLoopInformation::IsLoopInvariant(HInstruction* instruction, bool must_dominate) const {
+  HLoopInformation* other_loop = instruction->GetBlock()->GetLoopInformation();
+  if (other_loop != this && (other_loop == nullptr || !other_loop->IsIn(*this))) {
+    if (must_dominate) {
+      return instruction->GetBlock()->Dominates(GetHeader());
+    }
+    return true;
+  }
+  return false;
+}
+
 size_t HLoopInformation::GetLifetimeEnd() const {
   size_t last_position = 0;
   for (HBasicBlock* back_edge : GetBackEdges()) {