[inlining] documentation
[inlining] place to host depth-search related utilities
[inlining] preparing to move depth-search utilities
[inlining] uncluttering InliningPhase, depth-search utilities moved out
[inlining] preparing to move processNextInvoke() closer to the data it mutates
[inlining] moved processNextInvoke()
[inlining] processNextInvoke(), readability
renamed GraalTest.assertEquals* to assertDeepEquals to avoid confusion with JUnit API methods
HSAIL: converted KernelTester to re-use existing mechanism for deep equality testing