tree fa00068edc1391698af4d771430578fccd9dcd77
parent e5deafe9cdd81238c3916b04301ea884c93f46b5
author David Brazdil <dbrazdil@google.com> 1422890585 +0000
committer David Brazdil <dbrazdil@google.com> 1422899882 +0000

No SuspendChecks when branching to return block

The return basic block is usually placed at the beginning of the DEX
file, making the branches to it back edges where the Optimizing's
graph builder places SuspendCheck instructions, only to be removed
later by the instruction_simplifier pass. Since huge auto-generated
methods tend to contain hundreds/thousands of these, this patch
recognizes the pattern and prevents builder from generating the
redundant check in the first place.

Change-Id: I065a3c2f71964b8fc2e53dc20730ba42938b78a1