llvm-project.git/llvm/test/Transforms/LoopVectorize/runtime-check-needed-but-empty.ll, branch users/nico/python-2

[VPlan] Remove no-op SCALAR-STEPS after unrolling. (#123655)

2025-03-25T12:57:24+00:00

After unrolling, there may be additional simplifications that can be
applied. One example is removing SCALAR-STEPS for the first part where
only the first lane is demanded.

This removes redundant adds of 0 from a large number of tests (~200),
many which I am still working on updating.

In preparation for removing redundant WideIV steps added in
https://github.com/llvm/llvm-project/pull/119284.

PR: https://github.com/llvm/llvm-project/pull/123655

[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.

[VPlan] Preserve original induction order when creating scalar steps.

2024-01-31T13:31:28+00:00

Update createScalarIVSteps to take an insert point as parameter. This
ensures that the inserted scalar steps are in the same order as the
recipes they replace (vs in reverse order as currently). This helps to
reduce the diff for follow-up changes.

[VPlan] Fold (MUL A, 1) -> A as VPlan2VPlan transform.

2023-09-18T20:45:34+00:00

Add first VPlan-based recipe simplification to fold (MUL A, 1) -> A.
Among other things, this enables additional simplifications after
applying versioned strides, as follow up to D147783.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D159200

[LV] Use IRBuilder to create and optimize middle-block compare.

2023-08-29T10:42:18+00:00

Split off from D150398 to avoid builder-related diff changes there.
Using IRBuilder to create ICmps simplifies the result if both operands
are constants.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D158332

[VPlan] Replace versioned stride with constant during VPlan opts.

2023-06-13T07:26:55+00:00

After constructing the initial VPlan, replace VPValues for versioned
strides with their constant counterparts.

Differential Revision: https://reviews.llvm.org/D147783

{tests] Rerun autogen to reduce a diff [nfc]

2023-03-31T19:47:08+00:00

[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.

[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).