Skip to content

[RISCV] Unaligned vec mem => prefer alt opc vec #154153

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Aug 30, 2025
Merged

[RISCV] Unaligned vec mem => prefer alt opc vec #154153

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
569f60b
[RISCV] Unaligned vec mem => prefer alt opc vec
Aug 18, 2025
efdd5b5
updated checks in complex-loads.ll correctly.
Aug 29, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2731,6 +2731,10 @@ unsigned RISCVTTIImpl::getMinTripCountTailFoldingThreshold() const {
return RVVMinTripCount;
}

bool RISCVTTIImpl::preferAlternateOpcodeVectorization() const {
return ST->enableUnalignedVectorMem();
}

TTI::AddressingModeKind
RISCVTTIImpl::getPreferredAddressingMode(const Loop *L,
ScalarEvolution *SE) const {
Expand Down
2 changes: 1 addition & 1 deletion llvm/lib/Target/RISCV/RISCVTargetTransformInfo.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ class RISCVTTIImpl final : public BasicTTIImplBase<RISCVTTIImpl> {

unsigned getMaximumVF(unsigned ElemWidth, unsigned Opcode) const override;

bool preferAlternateOpcodeVectorization() const override { return false; }
bool preferAlternateOpcodeVectorization() const override;

bool preferEpilogueVectorization() const override {
// Epilogue vectorization is usually unprofitable - tail folding or
Expand Down
Loading