[Impala-ASF-CR] IMPALA-3897 Codegen null-aware constant in PHJ::ProcessBuildBatch()

["anujphadke (Code Review)" <ge...@cloudera.org>]

anujphadke has uploaded a new patch set (#2).

Change subject: IMPALA-3897 Codegen null-aware constant in PHJ::ProcessBuildBatch()
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IMPALA-3897 Codegen null-aware constant in PHJ::ProcessBuildBatch()

This change codegen outs a branch in ProcessBuildBatch(). This branch never gets
executed for most of the join types except NULL_AWARE_LEFT_ANTI_JOIN.
The branch itself is not expensive to execute, but it will reduce codegen
time by removing the dead code inside the branch for almost all join
modes.

Change-Id: I06acbebc9d2d23bef4734b480a5d3ce41680ea70
---
M be/src/codegen/gen_ir_descriptions.py
M be/src/exec/partitioned-hash-join-builder-ir.cc
M be/src/exec/partitioned-hash-join-builder.cc
M be/src/exec/partitioned-hash-join-builder.h
4 files changed, 20 insertions(+), 10 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/49/7849/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I06acbebc9d2d23bef4734b480a5d3ce41680ea70
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: anujphadke <ap...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <ta...@cloudera.com>