ARM64: Improve String.equals() intrinsic for const strings.
And add additional tests to 021-string2.
aosp_angler-userdebug:
before:
arm64 boot*.oat:
43324664
arm64 boot*.oat/string compression:
43411112
after:
arm64 boot*.oat:
43300136 (-24528)
arm64 boot*.oat/string compression:
43345464 (-65648)
The string compression code size difference drops from
86448 to 45328.
Test: m test-art-target on Nexus 6P
Test: m test-art-target on Nexus 6P with string compression enabled.
Bug:
31040547
Change-Id: I99a3777b91b248da2b0ac25abd260f9e5abb2c09