[PATCH] D30044: [ARM] Enable SMLAL[B|T] instruction selection

[Sam Parker via Phabricator via llvm-commits]

samparker updated this revision to Diff 88881.
samparker added a comment.

- Enabled for V5TE and added it as a test target.
- Simplifed the tests, because there were three targets testing for the same output.
- Numerous fixes that Tim pointed out.
- Replaced the final isel with tablegen matching.
- Tried using ComputeNumSignBits for identifying sign extending, but this didn't work because for the top values we need to perform SRA, but this then appears like a sext and results in the wrong opcodes being selected.
- Added support for sign extending loads as well as a test for this


https://reviews.llvm.org/D30044

Files:
  lib/Target/ARM/ARMISelDAGToDAG.cpp
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMISelLowering.h
  lib/Target/ARM/ARMInstrInfo.td
  lib/Target/ARM/ARMInstrThumb2.td
  lib/Target/ARM/ARMPatternHelpers.cpp
  lib/Target/ARM/ARMPatternHelpers.h
  lib/Target/ARM/CMakeLists.txt
  test/CodeGen/ARM/longMAC.ll

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