[MLIR][Arith] Add ValueBoundsOpInterface for FloorDivSI #137879
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@llvm/pr-subscribers-mlir Author: Quinn Dawkins (qedawkins) ChangesEnables value bounds inference through signed division operations. Full diff: https://github.com/llvm/llvm-project/pull/137879.diff 2 Files Affected:
diff --git a/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp b/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
index 6de151594e3e9..4695ac73455f6 100644
--- a/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
+++ b/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
@@ -75,6 +75,19 @@ struct MulIOpInterface
}
};
+struct DivSIOpInterface
+ : public ValueBoundsOpInterface::ExternalModel<DivSIOpInterface, DivSIOp> {
+ void populateBoundsForIndexValue(Operation *op, Value value,
+ ValueBoundsConstraintSet &cstr) const {
+ auto divSIOp = cast<DivSIOp>(op);
+ assert(value == divSIOp.getResult() && "invalid value");
+
+ AffineExpr lhs = cstr.getExpr(divSIOp.getLhs());
+ AffineExpr rhs = cstr.getExpr(divSIOp.getRhs());
+ cstr.bound(value) == lhs.floorDiv(rhs);
+ }
+};
+
struct SelectOpInterface
: public ValueBoundsOpInterface::ExternalModel<SelectOpInterface,
SelectOp> {
@@ -157,6 +170,7 @@ void mlir::arith::registerValueBoundsOpInterfaceExternalModels(
arith::ConstantOp::attachInterface<arith::ConstantOpInterface>(*ctx);
arith::SubIOp::attachInterface<arith::SubIOpInterface>(*ctx);
arith::MulIOp::attachInterface<arith::MulIOpInterface>(*ctx);
+ arith::DivSIOp::attachInterface<arith::DivSIOpInterface>(*ctx);
arith::SelectOp::attachInterface<arith::SelectOpInterface>(*ctx);
});
}
diff --git a/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir b/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
index 8fb3ba1a1ecce..eb2883c211734 100644
--- a/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
+++ b/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
@@ -65,6 +65,30 @@ func.func @arith_muli_non_pure(%a: index, %b: index) -> index {
// -----
+// CHECK: #[[$map:.*]] = affine_map<()[s0] -> (s0 floordiv 5)>
+// CHECK-LABEL: func @arith_divsi(
+// CHECK-SAME: %[[a:.*]]: index
+// CHECK: %[[apply:.*]] = affine.apply #[[$map]]()[%[[a]]]
+// CHECK: return %[[apply]]
+func.func @arith_divsi(%a: index) -> index {
+ %0 = arith.constant 5 : index
+ %1 = arith.divsi %a, %0 : index
+ %2 = "test.reify_bound"(%1) : (index) -> (index)
+ return %2 : index
+}
+
+// -----
+
+func.func @arith_divsi_non_pure(%a: index, %b: index) -> index {
+ %0 = arith.divsi %a, %b : index
+ // Semi-affine expressions (such as "symbol * symbol") are not supported.
+ // expected-error @below{{could not reify bound}}
+ %1 = "test.reify_bound"(%0) : (index) -> (index)
+ return %1 : index
+}
+
+// -----
+
// CHECK-LABEL: func @arith_const()
// CHECK: %[[c5:.*]] = arith.constant 5 : index
// CHECK: %[[c5:.*]] = arith.constant 5 : index
|
Member
|
@llvm/pr-subscribers-mlir-arith Author: Quinn Dawkins (qedawkins) ChangesEnables value bounds inference through signed division operations. Full diff: https://github.com/llvm/llvm-project/pull/137879.diff 2 Files Affected:
diff --git a/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp b/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
index 6de151594e3e9..4695ac73455f6 100644
--- a/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
+++ b/mlir/lib/Dialect/Arith/IR/ValueBoundsOpInterfaceImpl.cpp
@@ -75,6 +75,19 @@ struct MulIOpInterface
}
};
+struct DivSIOpInterface
+ : public ValueBoundsOpInterface::ExternalModel<DivSIOpInterface, DivSIOp> {
+ void populateBoundsForIndexValue(Operation *op, Value value,
+ ValueBoundsConstraintSet &cstr) const {
+ auto divSIOp = cast<DivSIOp>(op);
+ assert(value == divSIOp.getResult() && "invalid value");
+
+ AffineExpr lhs = cstr.getExpr(divSIOp.getLhs());
+ AffineExpr rhs = cstr.getExpr(divSIOp.getRhs());
+ cstr.bound(value) == lhs.floorDiv(rhs);
+ }
+};
+
struct SelectOpInterface
: public ValueBoundsOpInterface::ExternalModel<SelectOpInterface,
SelectOp> {
@@ -157,6 +170,7 @@ void mlir::arith::registerValueBoundsOpInterfaceExternalModels(
arith::ConstantOp::attachInterface<arith::ConstantOpInterface>(*ctx);
arith::SubIOp::attachInterface<arith::SubIOpInterface>(*ctx);
arith::MulIOp::attachInterface<arith::MulIOpInterface>(*ctx);
+ arith::DivSIOp::attachInterface<arith::DivSIOpInterface>(*ctx);
arith::SelectOp::attachInterface<arith::SelectOpInterface>(*ctx);
});
}
diff --git a/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir b/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
index 8fb3ba1a1ecce..eb2883c211734 100644
--- a/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
+++ b/mlir/test/Dialect/Arith/value-bounds-op-interface-impl.mlir
@@ -65,6 +65,30 @@ func.func @arith_muli_non_pure(%a: index, %b: index) -> index {
// -----
+// CHECK: #[[$map:.*]] = affine_map<()[s0] -> (s0 floordiv 5)>
+// CHECK-LABEL: func @arith_divsi(
+// CHECK-SAME: %[[a:.*]]: index
+// CHECK: %[[apply:.*]] = affine.apply #[[$map]]()[%[[a]]]
+// CHECK: return %[[apply]]
+func.func @arith_divsi(%a: index) -> index {
+ %0 = arith.constant 5 : index
+ %1 = arith.divsi %a, %0 : index
+ %2 = "test.reify_bound"(%1) : (index) -> (index)
+ return %2 : index
+}
+
+// -----
+
+func.func @arith_divsi_non_pure(%a: index, %b: index) -> index {
+ %0 = arith.divsi %a, %b : index
+ // Semi-affine expressions (such as "symbol * symbol") are not supported.
+ // expected-error @below{{could not reify bound}}
+ %1 = "test.reify_bound"(%0) : (index) -> (index)
+ return %1 : index
+}
+
+// -----
+
// CHECK-LABEL: func @arith_const()
// CHECK: %[[c5:.*]] = arith.constant 5 : index
// CHECK: %[[c5:.*]] = arith.constant 5 : index
|
krzysz00
reviewed
Apr 29, 2025
qedawkins
changed the title
matthias-springer
approved these changes
Apr 30, 2025
IanWood1
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to IanWood1/llvm-project
that referenced
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May 6, 2025
Enables value bounds inference through signed division operations.
GeorgeARM
pushed a commit
to GeorgeARM/llvm-project
that referenced
this pull request
May 7, 2025
Enables value bounds inference through signed division operations.
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Enables value bounds inference through signed division operations.