llvm-project.git/llvm/test/Transforms/LoopVectorize/pr50686.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.

[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

[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.

[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).

[LoopUtils] Simplify addRuntimeCheck to return a single value.

2021-10-18T17:03:09+00:00

This simplifies the return value of addRuntimeCheck from a pair of
instructions to a single `Value *`.

The existing users of addRuntimeChecks were ignoring the first element
of the pair, hence there is not reason to track FirstInst and return
it.

Additionally all users of addRuntimeChecks use the second returned
`Instruction *` just as `Value *`, so there is no need to return an
`Instruction *`. Therefore there is no need to create a redundant
dummy `and X, true` instruction any longer.

Effectively this change should not impact the generated code because the
redundant AND will be folded by later optimizations. But it is easy to
avoid creating it in the first place and it allows more accurately
estimating the cost of the runtime checks.

[LoopUtils] Fix incorrect RT check bounds of loop-invariant mem accesses

2021-07-19T11:38:24+00:00

This fixes the lower and upper bound calculation of a
RuntimeCheckingPtrGroup when it has more than one loop
invariant pointers. Resolves PR50686.

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D104148

[LV] Re-generate check lines of some fragile tests (NFC)

2021-07-19T11:38:24+00:00

Reviewed By: fhahn

Differential Revision: https://reviews.llvm.org/D105438