ART: Add unchecked conversions of arrays

Add array conversion functions that do not check the type,
and use them in an unchecked version for PointerArray.

Decreases dex2oatd preopting of a big app from 151s to 150s.

Bug: 123888325
Test: m test-art-host
Change-Id: Id58c65ac603a20c2cfb9e3289af4f3bc323554b6

1 files changed, 9 insertions, 0 deletions

diff --git a/runtime/mirror/array-inl.h b/runtime/mirror/array-inl.h
index 40507e7aee..c4a892b856 100644
--- a/runtime/mirror/array-inl.h
+++ b/runtime/mirror/array-inl.h
@@ -233,6 +233,15 @@ inline T PointerArray::GetElementPtrSize(uint32_t idx) {
   }
   return (T)static_cast<uintptr_t>(AsIntArray<kVerifyFlags>()->GetWithoutChecks(idx));
 }
+template<typename T, PointerSize kPointerSize, VerifyObjectFlags kVerifyFlags>
+inline T PointerArray::GetElementPtrSizeUnchecked(uint32_t idx) {
+  // C style casts here since we sometimes have T be a pointer, or sometimes an integer
+  // (for stack traces).
+  if (kPointerSize == PointerSize::k64) {
+    return (T)static_cast<uintptr_t>(AsLongArrayUnchecked<kVerifyFlags>()->GetWithoutChecks(idx));
+  }
+  return (T)static_cast<uintptr_t>(AsIntArrayUnchecked<kVerifyFlags>()->GetWithoutChecks(idx));
+}
 template<typename T, VerifyObjectFlags kVerifyFlags>
 inline T PointerArray::GetElementPtrSize(uint32_t idx, PointerSize ptr_size) {
   // C style casts here since we sometimes have T be a pointer, or sometimes an integer