llvm-project.git/llvm/test/Transforms/LoopVectorize/pr45259.ll, branch users/nico/python-2

[VPlan] Only execute VPExpandSCEVRecipes once and remove them (NFC).

2025-03-23T09:06:01+00:00

Instead of executing the whole entry VPIRBB twice, first only execute
the VPExpandSCEVRecipes and replace their uses with the expanded
VPValue, which will be a live-in. This allows removing special logic in
VPExpandSCEVRecipe to support executing twice and allows moving the
ExpandedSCEVs map out of VPTransformState.

It will also allow adding other recipes to the entry VPBB in the future.

[VPlan] Add incoming values for all predecessor to ResumePHI (NFCI).

2025-02-09T11:20:20+00:00

Follow-up as discussed when using VPInstruction::ResumePhi for all resume
values (#112147). This patch explicitly adds incoming values for each
predecessor in VPlan. This simplifies codegen and allows transformations
adjusting the predecessors of blocks with

NFC modulo incoming block order in phis.

[VPlan] Remove reverse() of predecessors from VPInstruction::generate.

2024-12-17T20:44:32+00:00

This was originally done to reduce the diff for the change. Remove it
and update the remaining tests. NFC modulo reordering of incoming
values.

Clean up after https://github.com/llvm/llvm-project/pull/114292.

[SCEVExpander] Don't try to reuse SCEVUnknown values (#115141)

2024-11-11T11:36:29+00:00

The expansion of a SCEVUnknown is trivial (it's just the wrapped value).
If we try to reuse an existing value it might be a more complex
expression that simplifies to the SCEVUnknown.

This is inspired by https://github.com/llvm/llvm-project/issues/114879,
because SCEVExpander replacing a constant with a phi node is just silly.
(I don't consider this a fix for that issue though.)

[LLVM][IR] Use splat syntax when printing Constant[Data]Vector. (#112548)

2024-11-06T11:53:33+00:00

[VPlan] Add VPIRInstruction, use for exit block live-outs. (#100735)

2024-09-14T20:21:55+00:00

Add a new VPIRInstruction recipe to wrap existing IR instructions not to
be modified during execution, execept for PHIs. For PHIs, a single
VPValue
operand is allowed, and it is used to add a new incoming value for the
single predecessor VPBB. Expect PHIs, VPIRInstructions cannot have any
operands.

Depends on https://github.com/llvm/llvm-project/pull/100658.

PR: https://github.com/llvm/llvm-project/pull/100735

[IRBuilder] Use canonical i64 type for insertelement index used by vector splats.

2023-01-11T14:08:06+00:00

Instcombine prefers this canonical form (see getPreferredVectorIndex),
as does IRBuilder when passing the index as an integer so we may as
well use the prefered form from creation.

NOTE: All test changes are mechanical with nothing else expected
beyond a change of index type from i32 to i64.

Differential Revision: https://reviews.llvm.org/D140983

[LoopVectorize] Convert some tests to opaque pointers (NFC)

2022-12-14T14:27:31+00:00

For these tests update_test_checks.py had to be rerun.

Recommit "[SCEV] Look through single value PHIs." (take 3)

2022-06-09T14:20:10+00:00

This reverts commit 1fbdbb559569641f6d509b569966901c8fb02b63.

All known issues surfaced by this patch should have been fixed now.

The fixes included fixing issues with SCEV expansion in LV and DA's
reliance on LCSSA phis.

[test][NewPM] Use -passes=loop-vectorize instead of -loop-vectorize

2022-04-28T14:46:00+00:00

Update a bunch of loop-vectorize regression tests to use the new PM
syntax (opt -passes=loop-vectorize) instead of the deprecated legacy
PM syntax (opt -loop-vectorize).