tree 3af3c0e6b9d845e611b560484882e6b438ef439a
parent a246510965fc57ec51d1b202649304535adfe9f3
author Vladimir Marko <vmarko@google.com> 1461845402 +0100
committer Vladimir Marko <vmarko@google.com> 1462822832 +0100

Intrinsify String.length() and String.isEmpty() as HIR.

Use HArrayLength for String.length() in anticipation of
changing the String.charAt() to HBoundsCheck+HArrayGet to
allow the existing BCE to seamlessly work for strings.
Use HArrayLength+HEqual for String.isEmpty().

We previously relied on inlining but we now want to apply
the new intrinsics even when we do not inline, i.e. when
compiling debuggable (as is currently the case for boot
image) or when we hit inlining limits, i.e. depth, size,
or the number of accumulated dex registers.

Bug: 28330359
Change-Id: Iab9d2f6d2967bdd930a72eb461f27efe8f37c103