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7 Commits

Author SHA1 Message Date
David Sherwood 6c7957c990 [SVE] Fix bug in SVEIntrinsicOpts::optimizePTest 
The code wasn't taking into account that the two operands
passed to ptest could be identical and was trying to erase
them twice.

Differential Revision: https://reviews.llvm.org/D85892
 2020-08-14 07:57:21 +01:00
Arthur Eubanks 2a672767cc Prefix some AArch64/ARM passes with "aarch64-"/"arm-" 
For consistency with other target specific passes.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D84560
 2020-07-27 11:00:39 -07:00
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
Kerry McLaughlin 36c76de678 [AArch64][SVE] Add a pass for SVE intrinsic optimisations 
Summary:
Creates the SVEIntrinsicOpts pass. In this patch, the pass tries
to remove unnecessary reinterpret intrinsics which convert to
and from svbool_t (llvm.aarch64.sve.convert.[to|from].svbool)

For example, the reinterprets below are redundant:

  %1 = call <vscale x 16 x i1> @llvm.aarch64.sve.convert.to.svbool.nxv4i1(<vscale x 4 x i1> %a)
  %2 = call <vscale x 4 x i1> @llvm.aarch64.sve.convert.from.svbool.nxv4i1(<vscale x 16 x i1> %1)

The pass also looks for ptest intrinsics and phi instructions where
the operands are being needlessly converted to and from svbool_t.

Reviewers: sdesmalen, andwar, efriedma, cameron.mcinally, c-rhodes, rengolin

Reviewed By: efriedma

Subscribers: mgorny, tschuett, kristof.beyls, hiraditya, rkruppe, psnobl, danielkiss, cfe-commits, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76078
 2020-04-14 10:41:49 +01:00