tree a700380294513e8e6878acd3b89292ca1c203d48
parent e717e2c2c436da1d6daa572bd3142e34aef25b1c
author David Srbecky <dsrbecky@google.com> 1457817004 +0000
committer David Srbecky <dsrbecky@google.com> 1457818730 +0000

Ignore empty maps when emitting DWARF variable locations.

This is rewrite of https://android-review.googlesource.com/#/c/202115

The aim in both cases is to avoid gaps in generated locations.
(which helps to keep the size of the generated DWARF down).

However, the previous CL was a bit too eager with extending of
variable scope and reporting locations. We might have reported
variable in scope when in fact, it was not.

This CL implements simpler solution by just filtering stackmaps
without dex register maps at first opportunity. This should
ensure that locations for breakpoint locations are completely
accurate as originally intended.

Change-Id: I98378716c0ef5ef46b12181502904621eb6ecf2f