[MLIR][TORCH] Add E2E support for aten.ceil.float op

This commit adds lowering of `aten.ceil.float` op.
This commit also fixes formatting for the file scalar.py.

Signed-Off By: Vivek Khandelwal <vivek@nod-labs.com>

include/torch-mlir/Dialect/Torch/IR/GeneratedTorchOps.td

@@ -6883,6 +6883,30 @@ def Torch_AtenEqDeviceOp : Torch_Op<"aten.eq.device", [
   }];
 }
 
+def Torch_AtenCeilFloatOp : Torch_Op<"aten.ceil.float", [
+    AllowsTypeRefinement,
+    HasValueSemantics,
+    ReadOnly
+  ]> {
+  let summary = "Generated op for `aten::ceil.float : (float) -> (int)`";
+  let arguments = (ins
+    Torch_FloatType:$a
+  );
+  let results = (outs
+    Torch_IntType:$result
+  );
+  let hasCustomAssemblyFormat = 1;
+  let extraClassDefinition = [{
+    ParseResult AtenCeilFloatOp::parse(OpAsmParser &parser, OperationState &result) {
+      return parseDefaultTorchOp(parser, result, 1, 1);
+    }
+    void AtenCeilFloatOp::print(OpAsmPrinter &printer) {
+      printDefaultTorchOp(printer, *this, 1, 1);
+    }
+  }];
+  let hasFolder = 1;
+}
+
 def Torch_Aten_SoftmaxBackwardDataOp : Torch_Op<"aten._softmax_backward_data", [
     AllowsTypeRefinement,
     HasValueSemantics,

lib/Conversion/TorchToStd/TorchToStd.cpp

@@ -13,6 +13,7 @@
 #include "mlir/Dialect/Arithmetic/IR/Arithmetic.h"
 #include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h"
 #include "mlir/Dialect/Func/IR/FuncOps.h"
+#include "mlir/Dialect/Math/IR/Math.h"
 #include "mlir/Dialect/Tensor/IR/Tensor.h"
 #include "mlir/Dialect/Traits.h"
 #include "mlir/Transforms/DialectConversion.h"
@@ -77,6 +78,25 @@ public:
 };
 } // namespace
 
+namespace {
+template <typename AtenOp, typename UnaryOp>
+class ConvertAtenUnaryOp : public OpConversionPattern<AtenOp> {
+public:
+  using OpConversionPattern<AtenOp>::OpConversionPattern;
+  LogicalResult
+  matchAndRewrite(AtenOp op,
+                  typename OpConversionPattern<AtenOp>::OpAdaptor adaptor,
+                  ConversionPatternRewriter &rewriter) const override {
+    Type resultType =
+        this->getTypeConverter()->convertType(op->getResult(0).getType());
+    Value result = rewriter.create<UnaryOp>(op.getLoc(), adaptor.a());
+    rewriter.replaceOp(
+        op, convertScalarToDtype(rewriter, op.getLoc(), result, resultType));
+    return success();
+  }
+};
+} // namespace
+
 namespace {
 // Lowers aten integer comparison ops.
 template <typename AtenOp, arith::CmpIPredicate Pred>
@@ -182,6 +202,7 @@ public:
     registry.insert<arith::ArithmeticDialect>();
     registry.insert<tensor::TensorDialect>();
     registry.insert<cf::ControlFlowDialect>();
+    registry.insert<math::MathDialect>();
     TorchConversion::getBackendTypeConversionDependentDialects(registry);
   }
 
@@ -190,7 +211,7 @@ public:
     ConversionTarget target(*context);
     target.addLegalDialect<Torch::TorchDialect, func::FuncDialect,
                            arith::ArithmeticDialect, tensor::TensorDialect,
-                           cf::ControlFlowDialect>();
+                           cf::ControlFlowDialect, math::MathDialect>();
 
     TypeConverter typeConverter;
     typeConverter.addConversion([](Type type) { return type; });
@@ -246,6 +267,9 @@ public:
     target.addIllegalOp<AtenDivFloatOp>();
     patterns.add<ConvertAtenBinaryOp<AtenDivFloatOp, arith::DivFOp>>(
         typeConverter, context);
+    target.addIllegalOp<AtenCeilFloatOp>();
+    patterns.add<ConvertAtenUnaryOp<AtenCeilFloatOp, math::CeilOp>>(
+        typeConverter, context);
 
     if (failed(applyPartialConversion(getOperation(), target,
                                       std::move(patterns))))

lib/Dialect/Torch/IR/TorchOps.cpp

@@ -1545,6 +1545,16 @@ OpFoldResult AtenDivFloatOp::fold(ArrayRef<Attribute> operands) {
   return nullptr;
 }
 
+// AtenCeilFloatOp
+//===----------------------------------------------------------------------===//
+
+OpFoldResult AtenCeilFloatOp::fold(ArrayRef<Attribute> operands) {
+  double c;
+  if (matchPattern(getOperand(), m_TorchConstantFloat(&c)))
+    return getI64IntegerAttr(getContext(), std::ceil(c));
+  return nullptr;
+}
+
 //===----------------------------------------------------------------------===//
 
 //===----------------------------------------------------------------------===//

python/torch_mlir/dialects/torch/importer/jit_ir/build_tools/torch_ods_gen.py

@@ -509,6 +509,7 @@ def emit_ops(emitter_td: TextEmitter, registry: Registry):
     emit("aten::_set_item.t : (t[], int, t) -> (t[])")
     emit("aten::div : (Scalar, Scalar) -> (float)")
     emit("aten::eq.device : (Device, Device) -> (bool)")
+    emit("aten::ceil.float : (float) -> (int)", has_folder=True)
 
     # backprop ops
     emit("aten::_softmax_backward_data : (Tensor, Tensor, int, int) -> (Tensor)")

python/torch_mlir_e2e_test/test_suite/scalar.py

@@ -11,7 +11,9 @@ from torch_mlir_e2e_test.torchscript.annotations import annotate_args, export
 
 # ==============================================================================
 
+
 class AddIntModule(torch.nn.Module):
+
     def __init__(self):
         super().__init__()
 
@@ -29,9 +31,12 @@ class AddIntModule(torch.nn.Module):
 def AddIntModule_basic(module, tu: TestUtils):
     module.forward(torch.randint(-100, 100, ()), torch.randint(-100, 100, ()))
 
+
 # ==============================================================================
 
+
 class SubIntModule(torch.nn.Module):
+
     def __init__(self):
         super().__init__()
 
@@ -49,9 +54,12 @@ class SubIntModule(torch.nn.Module):
 def SubIntModule_basic(module, tu: TestUtils):
     module.forward(torch.randint(-100, 100, ()), torch.randint(-100, 100, ()))
 
+
 # ==============================================================================
 
+
 class SubFloatModule(torch.nn.Module):
+
     def __init__(self):
         super().__init__()
 
@@ -69,9 +77,12 @@ class SubFloatModule(torch.nn.Module):
 def SubFloatModule_basic(module, tu: TestUtils):
     module.forward(torch.rand(()).double(), torch.rand(()).double())
 
+
 # ==============================================================================
 
+
 class MulIntModule(torch.nn.Module):
+
     def __init__(self):
         super().__init__()
 
@@ -89,9 +100,12 @@ class MulIntModule(torch.nn.Module):
 def MulIntModule_basic(module, tu: TestUtils):
     module.forward(torch.randint(-100, 100, ()), torch.randint(-100, 100, ()))
 
+
 # ==============================================================================
 
+
 class DivFloatModule(torch.nn.Module):
+
     def __init__(self):
         super().__init__()
 
@@ -108,3 +122,27 @@ class DivFloatModule(torch.nn.Module):
 @register_test_case(module_factory=lambda: DivFloatModule())
 def DivFloatModule_basic(module, tu: TestUtils):
     module.forward(torch.rand(()).double(), torch.rand(()).double())
+
+
+# ==============================================================================
+
+
+class CeilFloatModule(torch.nn.Module):
+
+    def __init__(self):
+        super().__init__()
+
+    @export
+    @annotate_args([
+        None,
+        ([], torch.float64, True),
+        ([], torch.float64, True),
+    ])
+    def forward(self, lhs, rhs):
+        sub = float(lhs) - float(rhs)
+        return torch.ops.aten.ceil(float(sub))
+
+
+@register_test_case(module_factory=lambda: CeilFloatModule())
+def CeilFloatModule_basic(module, tu: TestUtils):
+    module.forward(torch.rand(()).double(), torch.rand(()).double())

test/Conversion/TorchToStd/basic.mlir

@@ -207,3 +207,15 @@ func @torch.aten.ne.float_int(%arg0: !torch.float, %arg1: !torch.int) -> !torch.
   %0 = torch.aten.ne.float_int %arg0, %arg1 : !torch.float, !torch.int -> !torch.bool
   return %0 : !torch.bool
 }
+
+// CHECK-LABEL:  func @torch.aten.ceil.float(
+// CHECK-SAME:                            %[[ARG:.*]]: !torch.float) -> !torch.int {
+// CHECK:          %[[ARG_F64:.*]] = torch_c.to_f64 %[[ARG]]
+// CHECK:          %[[CEIL:.*]] = math.ceil %[[ARG_F64]] : f64
+// CHECK:          %[[CEIL_I64:.*]] = arith.fptosi %[[CEIL]] : f64 to i64
+// CHECK:          %[[OUT:.*]] = torch_c.from_i64 %[[CEIL_I64]]
+// CHECK:          return %[[OUT]] : !torch.int
+func @torch.aten.ceil.float(%arg0: !torch.float) -> !torch.int {
+  %0 = torch.aten.ceil.float %arg0 : !torch.float -> !torch.int
+  return %0 : !torch.int
+}

test/Dialect/Torch/canonicalize.mlir

@@ -1191,3 +1191,21 @@ func @torch.aten.ge.float$different_value() -> !torch.bool {
   %2 = torch.aten.ge.float %float4, %float4_0: !torch.float, !torch.float -> !torch.bool
   return %2 : !torch.bool
 }
+
+// CHECK-LABEL:   func @torch.aten.ceil.float$fold_cst() -> !torch.int {
+// CHECK:           %[[CST2:.*]] = torch.constant.int 2
+// CHECK:           return %[[CST2]] : !torch.int
+func @torch.aten.ceil.float$fold_cst() -> !torch.int {
+  %float = torch.constant.float 1.5
+  %1 = torch.aten.ceil.float %float : !torch.float -> !torch.int
+  return %1 : !torch.int
+}
+
+// CHECK-LABEL:   func @torch.aten.ceil.float$no_fold(
+// CHECK-SAME:            %[[ARG:.*]]: !torch.float) -> !torch.int {
+// CHECK:           %[[RESULT:.*]] = torch.aten.ceil.float %[[ARG]] : !torch.float -> !torch.int
+// CHECK:           return %[[RESULT]] : !torch.int
+func @torch.aten.ceil.float$no_fold(%arg0 : !torch.float) -> !torch.int {
+  %1 = torch.aten.ceil.float %arg0 : !torch.float -> !torch.int
+  return %1 : !torch.int
+}