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| author | Zvi Rackover <zvi.rackover@intel.com> | 2018-01-11 18:02:33 +0000 |
|---|---|---|
| committer | Zvi Rackover <zvi.rackover@intel.com> | 2018-01-11 18:02:33 +0000 |
| commit | 999e6c296791cbf9b73ada4d0c8f57a9692974af (patch) | |
| tree | 2d9dcbbc0e5a6ad1dd9f98437b7833beeb1f29e6 /lldb/packages/Python/lldbsuite/test/python_api/process/main.cpp | |
| parent | be6fa82ee56ea48068061d1fe77138f9b5bc1c51 (diff) | |
| download | bcm5719-llvm-999e6c296791cbf9b73ada4d0c8f57a9692974af.tar.gz bcm5719-llvm-999e6c296791cbf9b73ada4d0c8f57a9692974af.zip | |
DAGCombine: Let truncates negate extension through extract-subvector
Summary:
Fold cases such as:
(v8i8 truncate (v8i32 extract_subvector (v16i32 sext (v16i8 V), Idx)))
->
(v8i8 extract_subvector (v16i8 V), Idx)
This can be generalized to cases where the truncate and extend do not
fully cancel each other out, but it may require querying the target
about profitability.
Reviewers: RKSimon, craig.topper, spatel, efriedma
Reviewed By: RKSimon
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D41927
llvm-svn: 322300
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/process/main.cpp')
0 files changed, 0 insertions, 0 deletions
