7 Commits

Author SHA1 Message Date
Florian Hahn
df8efbdbbf
[SCEV] Remove existing predicates implied by newly added ones. (#118185)
When adding a new predicate to a union predicate, some of the existing
predicates may be implied by the new predicate. Remove any existing
predicates that are already implied by the new predicate.

Depends on https://github.com/llvm/llvm-project/pull/118184 to show the
main benefit.

PR: https://github.com/llvm/llvm-project/pull/118185
2024-12-20 20:49:37 +00:00
Florian Hahn
4ad0fdd163
[VPlan] Remove reverse() of predecessors from VPInstruction::generate.
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.
2024-12-17 20:44:32 +00:00
Florian Hahn
7f7f540a48
Reapply "[VPlan] Update scalar induction resume values in VPlan. (#110577)"
This reverts commit f09b16e2671cbcdf7cb7dc7ed705db092a9deda1.

The crash when building llvm-test-suite with stage2 should have been
fixed by 1091fad31a83d5ab87eb6fa11fe3bdb3f0d152ea.
2024-12-06 19:41:51 +00:00
Nikita Popov
f09b16e267 Revert "[VPlan] Update scalar induction resume values in VPlan. (#110577)"
This reverts commit 0678e2058364ec10b94560d27ec7138dfa003287.
This reverts commit 1091fad31a83d5ab87eb6fa11fe3bdb3f0d152ea.

Causes crashes in llvm-test-suite when using stage 2 clang.
2024-12-06 18:01:42 +01:00
Florian Hahn
0678e20583
[VPlan] Update scalar induction resume values in VPlan. (#110577)
Updated ILV.createInductionResumeValues (now createInductionResumeVPValue)
to directly update the VPIRInstructions wrapping the original phis with the 
created resume values.

This is the first step towards modeling them completely in VPlan.
Subsequent patches will move creation of the resume values completely
into VPlan.

Depends on https://github.com/llvm/llvm-project/pull/109975.

PR: https://github.com/llvm/llvm-project/pull/110577
2024-12-06 12:26:19 +00:00
Florian Hahn
96e83d3705
[LV] Use IRBuilder to create and optimize middle-block compare.
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
2023-08-29 11:42:18 +01:00
Florian Hahn
1746ac42ca
[LV] Forget SCEVs for exit phis after vectorization.
After vectorization, the exit blocks of the original loop will have additional
predecessors. Invalidate SCEVs for the exit phis in case SE looked through
single-entry phis.

Fixes https://github.com/llvm/llvm-project/issues/63368
Fixes https://github.com/llvm/llvm-project/issues/63669
2023-07-04 21:28:03 +01:00