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[mlir] Implement inferResultRanges for vector.step op #151536

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Merged
merged 2 commits into from
Jul 31, 2025
Merged

[mlir] Implement inferResultRanges for vector.step op #151536

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[mlir] Implement inferResultRanges for vector.step op
Max191 Jul 31, 2025
5e0b9c2
Merge branch 'main' into vector-step-int-range
Max191 Jul 31, 2025
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5 changes: 4 additions & 1 deletion mlir/include/mlir/Dialect/Vector/IR/VectorOps.td
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Original file line number Diff line number Diff line change
Expand Up @@ -2877,7 +2877,10 @@ def Vector_ScanOp :
// VectorStepOp
//===----------------------------------------------------------------------===//

def Vector_StepOp : Vector_Op<"step", [Pure]> {
def Vector_StepOp : Vector_Op<"step", [
Pure,
DeclareOpInterfaceMethods<InferIntRangeInterface, ["inferResultRanges"]>
]> {
let summary = "A linear sequence of values from 0 to N";
let description = [{
A `step` operation produces an index vector, i.e. a 1-D vector of values of
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17 changes: 17 additions & 0 deletions mlir/lib/Dialect/Vector/IR/VectorOps.cpp
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Expand Up @@ -7202,6 +7202,23 @@ Value mlir::vector::makeArithReduction(OpBuilder &b, Location loc,
return selectPassthru(b, mask, result, acc);
}

//===----------------------------------------------------------------------===//
// StepOp
//===----------------------------------------------------------------------===//

void StepOp::inferResultRanges(ArrayRef<ConstantIntRanges> argRanges,
SetIntRangeFn setResultRanges) {
auto resultType = cast<VectorType>(getType());
if (resultType.isScalable()) {
return;
}
unsigned bitwidth = ConstantIntRanges::getStorageBitwidth(resultType);
APInt zero(bitwidth, 0);
APInt high(bitwidth, resultType.getDimSize(0) - 1);
ConstantIntRanges result = {zero, high, zero, high};
setResultRanges(getResult(), result);
}

//===----------------------------------------------------------------------===//
// Vector Masking Utilities
//===----------------------------------------------------------------------===//
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8 changes: 8 additions & 0 deletions mlir/test/Dialect/Vector/int-range-interface.mlir
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Expand Up @@ -108,3 +108,11 @@ func.func @test_vector_extsi() -> vector<2xi32> {
%2 = test.reflect_bounds %1 : vector<2xi32>
func.return %2 : vector<2xi32>
}

// CHECK-LABEL: func @vector_step
// CHECK: test.reflect_bounds {smax = 7 : index, smin = 0 : index, umax = 7 : index, umin = 0 : index}
func.func @vector_step() -> vector<8xindex> {
%0 = vector.step : vector<8xindex>
%1 = test.reflect_bounds %0 : vector<8xindex>
func.return %1 : vector<8xindex>
}