[PATCH] D28176: [GlobalISel] Add support for switch statements

[Kristof Beyls via Phabricator via llvm-commits]

kristof.beyls created this revision.
kristof.beyls added reviewers: qcolombet, t.p.northover, ab, dsanders, rovka.
kristof.beyls added a subscriber: llvm-commits.
Herald added a subscriber: dberris.

Add support for lowering switch statements.
This patch does this using a trivial chain of conditional branches.
In the future, we probably want to reuse the optimized switch lowering used in SelectionDAG.

This increases the compile pass rate in the test-suite run with -O0 -mllvm -global-isel=true -mllvm -global-isel-abort=1 from 53.6% to 59.9%.


https://reviews.llvm.org/D28176

Files:
  include/llvm/CodeGen/GlobalISel/IRTranslator.h
  lib/CodeGen/GlobalISel/IRTranslator.cpp
  test/CodeGen/AArch64/GlobalISel/arm64-irtranslator.ll

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