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Author SHA1 Message Date
Paul Walker 6457455248 [SVE] Use NEON for extract_vector_elt when the index is in range. 
Patch also adds missing patterns for unpacked vector types and
extracts of element zero.

Differential Revision: https://reviews.llvm.org/D87842
 2020-09-21 13:12:28 +01:00
David Sherwood 02650ac036 [SVE][CodeGen] Add README for SVE-related warnings in tests 
I have added a new file:

  llvm/test/CodeGen/AArch64/README

that describes what to do in the event one of the SVE codegen tests
fails the warnings check. In addition, I've added comments to all
the relevant SVE tests pointing users at the README file.

Differential Revision: https://reviews.llvm.org/D83467
 2020-07-14 08:31:10 +01:00
David Sherwood 3cfd74e64b [SVE] Add checks for no warnings in SVE tests 
There are now quite a few SVE tests in LLVM and Clang that do not
emit warnings related to invalid use of EVT::getVectorNumElements()
and VectorType::getNumElements(). For these tests I have added
additional checks that there are no warnings in order to prevent
any future regressions.

Differential Revision: https://reviews.llvm.org/D80712
 2020-06-18 13:18:01 +01:00
David Sherwood e3836fe1a5 Revert "[SVE] Add checks for no warnings in SVE tests" 
This reverts commit fb495c3170.

Was causing test failures and broke buildbot.
 2020-06-18 08:03:31 +01:00
David Sherwood fb495c3170 [SVE] Add checks for no warnings in SVE tests 
There are now quite a few SVE tests in LLVM and Clang that do not
emit warnings related to invalid use of EVT::getVectorNumElements()
and VectorType::getNumElements(). For these tests I have added
additional checks that there are no warnings in order to prevent
any future regressions.

Differential Revision: https://reviews.llvm.org/D80712
 2020-06-18 07:49:48 +01:00
David Sherwood b147b88c84 [CodeGen] Add support for extracting elements of scalable vectors 
I have tried to ensure that SelectionDAG and DAGCombiner do
sensible things for scalable vectors, and added support for a
limited number of simple folds. Codegen support for the vector
extract patterns have also been added to the AArch64 backend.

New vector extract tests have been added here:

  CodeGen/AArch64/sve-extract-element.ll

and I have also added new folds using inserts and extracts here:

  CodeGen/AArch64/sve-insert-element.ll

Differential Revision: https://reviews.llvm.org/D80208
 2020-05-29 07:49:43 +01:00