Skip to content

[RISCV][EVL] Drop EVLIndVarSimplifyPass from the pipeline #151483

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 5, 2025
Merged

[RISCV][EVL] Drop EVLIndVarSimplifyPass from the pipeline #151483

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
d4068e4
[RISCV][EVL] Disable the EVLIndVarSimplify Pass by default
arcbbb Jul 31, 2025
2af78a8
Address comments
arcbbb Aug 1, 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
7 changes: 6 additions & 1 deletion llvm/lib/Target/RISCV/RISCVTargetMachine.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,11 @@ static cl::opt<bool>
cl::desc("Enable Machine Pipeliner for RISC-V"),
cl::init(false), cl::Hidden);

static cl::opt<bool>
EnableEVLIndVarSimplify("riscv-simplify-evl-iv",
cl::desc("Enable the EVLIndVarSimplify pass."),
cl::init(false), cl::Hidden);

extern "C" LLVM_ABI LLVM_EXTERNAL_VISIBILITY void LLVMInitializeRISCVTarget() {
RegisterTargetMachine<RISCVTargetMachine> X(getTheRISCV32Target());
RegisterTargetMachine<RISCVTargetMachine> Y(getTheRISCV64Target());
Expand Down Expand Up @@ -645,7 +650,7 @@ void RISCVTargetMachine::registerPassBuilderCallbacks(PassBuilder &PB) {

PB.registerVectorizerEndEPCallback(
[](FunctionPassManager &FPM, OptimizationLevel Level) {
if (Level.isOptimizingForSpeed())
if (Level.isOptimizingForSpeed() && EnableEVLIndVarSimplify)
FPM.addPass(createFunctionToLoopPassAdaptor(EVLIndVarSimplifyPass()));
});
}
Expand Down