Florian Hahn
b9ce7656e9
[VPlan] Add VPInstruction to unpack vector values to scalars. ( #155670 )
...
Add a new Unpack VPInstruction (name to be improved) to explicitly
extract scalars values from vectors.
Test changes are movements of the extracts: they are no generated
together and also directly after the producer.
Depends on https://github.com/llvm/llvm-project/pull/155102 (included in
PR)
PR: https://github.com/llvm/llvm-project/pull/155670
2025-10-19 18:49:05 +00:00
Florian Hahn
9b1b93766d
Reapply "[SCEVExp] Add helper to clean up dead instructions after expansion. ( #157308 )"
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This reverts commit eeb43806eb1b40e690aeeba496ee974172202df9.
Recommit with with a fix for MSan failure (
https://lab.llvm.org/buildbot/#/builders/169/builds/14799 ), by adding a
set to track deleted values. Using the InsertedInstructions set is not
sufficient, as it use asserting value handles as keys, which may
dereference the value at construction.
Original message:
Add new helper to erase dead instructions inserted during SCEV expansion
but not being used due to InstSimplifyFolder simplifications.
Together with https://github.com/llvm/llvm-project/pull/157307 this also
allows removing some specialized folds, e.g.
https://github.com/llvm/llvm-project/blob/main/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp#L2205
PR: https://github.com/llvm/llvm-project/pull/157308
2025-09-09 09:47:41 +01:00
Florian Hahn
eeb43806eb
Revert "[SCEVExp] Add helper to clean up dead instructions after expansion. ( #157308 )"
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This reverts commit 528b13df571c86a2c5b8305d7974f135d785e30f.
Triggers MSan errors in some configurations, e.g.
https://lab.llvm.org/buildbot/#/builders/169/builds/14799
2025-09-08 14:52:28 +01:00
Florian Hahn
528b13df57
[SCEVExp] Add helper to clean up dead instructions after expansion. ( #157308 )
...
Add new helper to erase dead instructions inserted during SCEV expansion
but not being used due to InstSimplifyFolder simplifications.
Together with https://github.com/llvm/llvm-project/pull/157307 this also
allows removing some specialized folds, e.g.
https://github.com/llvm/llvm-project/blob/main/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp#L2205
PR: https://github.com/llvm/llvm-project/pull/157308
2025-09-08 10:53:20 +01:00
Florian Hahn
f84f4e1e05
[LV] Don't crash on inner loops with RT checks in VPlan-native path.
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Assert that we only generate runtime checks for inner loops in
emitMemRuntimeChecks, instead of returning nullptr in the VPlan-native
path, which is causing crashes and incorrect code.
2025-03-10 20:28:56 +00:00
