[Dynamic Shape] Add helper function MakeGenerateShapeOpAttribute (#60512)

* add helper function MakeGenerateShapeOpAttribute

* fix complier complaint

* Code format

Author: jiahy0825

paddle/cinn/hlir/dialect/operator/ir/generate_shape_util.cc

@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #include "paddle/cinn/hlir/dialect/operator/ir/generate_shape_util.h"
+#include <unordered_set>
 #include "paddle/pir/core/builder.h"
 #include "paddle/pir/core/builtin_attribute.h"
 
@@ -422,4 +423,238 @@ MakeGetterDimExpr4SymbolName(
   };
 }
 
+namespace {
+
+bool IsAtomicImpl(int64_t) { return true; }
+
+bool IsAtomicImpl(const std::string&) { return true; }
+
+bool IsAtomicImpl(const symbol::Negative<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Reciprocal<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Add<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Mul<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Max<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Min<symbol::DimExpr>&) { return false; }
+
+bool IsAtomicImpl(const symbol::Broadcast<symbol::DimExpr>&) { return false; }
+
+bool IsAtomic(const symbol::DimExpr& dim_expr) {
+  return std::visit([](const auto& impl) { return IsAtomicImpl(impl); },
+                    dim_expr.variant());
+}
+
+bool InputDimExprsAllSupported(
+    const ShapeOrDataDimExprs4ValueT& ShapeOrDataDimExprs4Value,
+    const std::vector<pir::Value>& input_tensors) {
+  const auto& AllSupported =
+      [](const std::vector<symbol::DimExpr>& dim_exprs) -> bool {
+    for (const auto& dim_expr : dim_exprs) {
+      if (!IsAtomic(dim_expr)) return false;
+    }
+    return true;
+  };
+  for (const auto& input_tensor : input_tensors) {
+    const auto& dim_exprs = ShapeOrDataDimExprs4Value(input_tensor);
+    if (!AllSupported(dim_exprs.shape())) return false;
+    if (dim_exprs.data().has_value()) {
+      if (!AllSupported(dim_exprs.data().value())) return false;
+    }
+  }
+  return true;
+}
+
+void ConvertDimExprToAttributes(pir::IrContext* ir_context,
+                                const std::vector<symbol::DimExpr>& dim_exprs,
+                                std::vector<pir::Attribute>* attrs) {
+  attrs->clear();
+  attrs->reserve(dim_exprs.size());
+  for (const auto& dim_expr : dim_exprs) {
+    attrs->emplace_back(ConvertDimExprToAttribute(ir_context, dim_expr));
+  }
+}
+
+void CollectSymbolNames(const symbol::DimExpr& dim_expr,
+                        std::set<std::string>* ret);
+
+void CollectSymbolNamesImpl(const int64_t& dim_expr,
+                            std::set<std::string>* ret) {
+  // do nothing.
+}
+
+void CollectSymbolNamesImpl(const std::string& dim_expr,
+                            std::set<std::string>* ret) {
+  ret->insert(dim_expr);
+}
+
+template <typename T>
+void CollectSymbolNamesImplForUnary(const T& dim_expr,
+                                    std::set<std::string>* ret) {
+  const auto& [operand] = *dim_expr;
+  CollectSymbolNames(operand, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Negative<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForUnary(dim_expr, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Reciprocal<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForUnary(dim_expr, ret);
+}
+
+template <typename T>
+void CollectSymbolNamesImplForVariadic(const T& dim_expr,
+                                       std::set<std::string>* ret) {
+  const auto& operands = *(dim_expr.operands);
+  for (const auto& operand : operands) {
+    CollectSymbolNames(operand, ret);
+  }
+}
+
+void CollectSymbolNamesImpl(const symbol::Add<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForVariadic(dim_expr, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Mul<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForVariadic(dim_expr, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Max<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForVariadic(dim_expr, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Min<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForVariadic(dim_expr, ret);
+}
+
+void CollectSymbolNamesImpl(const symbol::Broadcast<symbol::DimExpr>& dim_expr,
+                            std::set<std::string>* ret) {
+  CollectSymbolNamesImplForVariadic(dim_expr, ret);
+}
+
+void CollectSymbolNames(const symbol::DimExpr& dim_expr,
+                        std::set<std::string>* ret) {
+  return std::visit(
+      [&](const auto& impl) { return CollectSymbolNamesImpl(impl, ret); },
+      dim_expr.variant());
+}
+
+void CollectSymbolNames(const std::vector<symbol::DimExpr>& dim_exprs,
+                        std::set<std::string>* ret) {
+  for (const auto& dim_expr : dim_exprs) {
+    CollectSymbolNames(dim_expr, ret);
+  }
+}
+
+template <typename SymbolBindingsT>
+void AppendSymbolBindings(const std::vector<symbol::DimExpr>& dim_exprs,
+                          const std::set<std::string>& symbol_names,
+                          int in_tensor_idx,
+                          GenerateShapeOp::SymbolBindings* symbol_bindings) {
+  for (int in_tensor_dim_idx = 0; in_tensor_dim_idx < dim_exprs.size();
+       ++in_tensor_dim_idx) {
+    const auto& dim_expr = dim_exprs.at(in_tensor_dim_idx);
+    CHECK(IsAtomic(dim_expr));
+    if (!dim_expr.isa<std::string>()) continue;
+    const auto& sym_name = dim_expr.dyn_cast<std::string>();
+    if (symbol_names.find(sym_name) == symbol_names.end()) continue;
+    symbol_bindings->emplace_back(SymbolBindingsT{
+        /*.symbol_name=*/sym_name,
+        /*.input_tensor_idx=*/in_tensor_idx,
+        /*.input_tensor_dim_idx=*/in_tensor_dim_idx,
+    });
+  }
+}
+
+void GenerateSymbolBindings(
+    const ShapeOrDataDimExprs4ValueT& ShapeOrDataDimExprs4Value,
+    const std::vector<pir::Value>& input_tensors,
+    const std::set<std::string>& symbol_names,
+    GenerateShapeOp::SymbolBindings* symbol_bindings) {
+  for (int i = 0; i < input_tensors.size(); ++i) {
+    const auto& input_tensor = input_tensors.at(i);
+    const auto& dim_exprs = ShapeOrDataDimExprs4Value(input_tensor);
+    AppendSymbolBindings<GenerateShapeOp::ShapeSymbolBinding>(
+        dim_exprs.shape(), symbol_names, i, symbol_bindings);
+    if (dim_exprs.data().has_value()) {
+      AppendSymbolBindings<GenerateShapeOp::DataSymbolBinding>(
+          dim_exprs.shape(), symbol_names, i, symbol_bindings);
+    }
+  }
+}
+
+std::vector<pir::Value> GetMinimalInputs(
+    const ShapeOrDataDimExprs4ValueT& ShapeOrDataDimExprs4Value,
+    const std::vector<pir::Value>& input_tensors) {
+  std::unordered_set<symbol::DimExpr> handdled_dim_exprs;
+  std::unordered_set<pir::Value> first_occurred_input_tensors;
+  auto TryCollectFirstOcurredInput_tensor =
+      [&](pir::Value input_tensor,
+          const std::vector<symbol::DimExpr>& dim_exprs) {
+        for (const auto& dim_expr : dim_exprs) {
+          if (dim_expr.isa<int64_t>()) continue;
+          if (!handdled_dim_exprs.insert(dim_expr).second) {
+            first_occurred_input_tensors.insert(input_tensor);
+          }
+        }
+      };
+  for (pir::Value input_tensor : input_tensors) {
+    const auto& shape_or_data_dim_exprs =
+        ShapeOrDataDimExprs4Value(input_tensor);
+    if (shape_or_data_dim_exprs.data().has_value()) {
+      TryCollectFirstOcurredInput_tensor(
+          input_tensor, shape_or_data_dim_exprs.data().value());
+    }
+    TryCollectFirstOcurredInput_tensor(input_tensor,
+                                       shape_or_data_dim_exprs.shape());
+  }
+  std::vector<pir::Value> ret{};
+  ret.reserve(input_tensors.size());
+  for (pir::Value input_tensor : input_tensors) {
+    if (first_occurred_input_tensors.count(input_tensor) > 0) {
+      ret.emplace_back(input_tensor);
+    }
+  }
+  return ret;
+}
+
+}  // namespace
+
+bool MakeGenerateShapeOpAttribute(
+    pir::IrContext* ir_context,
+    const ShapeOrDataDimExprs4ValueT& ShapeOrDataDimExprs4Value,
+    const std::vector<symbol::DimExpr>& out_dim_exprs,
+    const std::vector<pir::Value>& origin_inputs,
+    std::vector<pir::Value>* minial_inputs,
+    std::vector<pir::Attribute>* output_dim_expr_attrs,
+    GenerateShapeOp::SymbolBindings* symbol_bindings) {
+  *minial_inputs = GetMinimalInputs(ShapeOrDataDimExprs4Value, origin_inputs);
+  if (!InputDimExprsAllSupported(ShapeOrDataDimExprs4Value, *minial_inputs)) {
+    VLOG(4) << "input dim_exprs are not as simple as symbols, please make sure "
+               "they are handled by other passes";
+    return false;
+  }
+  // generate output_dim_expr_attrs
+  ConvertDimExprToAttributes(
+      ir_context, out_dim_exprs, /*out*/ output_dim_expr_attrs);
+  // generate symbol_bindings
+  std::set<std::string> symbol_names_in_out_dim_exprs{};
+  CollectSymbolNames(out_dim_exprs, &symbol_names_in_out_dim_exprs);
+  GenerateSymbolBindings(ShapeOrDataDimExprs4Value,
+                         *minial_inputs,
+                         symbol_names_in_out_dim_exprs,
+                         /*out*/ symbol_bindings);
+  return true;
+}
+
 }  // namespace cinn::dialect

paddle/cinn/hlir/dialect/operator/ir/generate_shape_util.h

@@ -14,7 +14,9 @@
 
 #pragma once
 
+#include <functional>
 #include <optional>
+#include <vector>
 #include "paddle/cinn/hlir/dialect/operator/ir/manual_op.h"
 #include "paddle/pir/core/builder.h"
 #include "paddle/pir/dialect/shape/utils/dim_expr.h"
@@ -46,4 +48,17 @@ MakeGetterDimExpr4SymbolName(
     const std::function<const symbol::ShapeOrDataDimExprs&(int in_tensor_idx)>&
         DimExpr4InputDim);
 
+using ShapeOrDataDimExprs4ValueT =
+    std::function<const symbol::ShapeOrDataDimExprs&(pir::Value)>;
+
+// Returns true if success.
+bool MakeGenerateShapeOpAttribute(
+    pir::IrContext* ir_context,
+    const ShapeOrDataDimExprs4ValueT& ShapeOrDataDimExprs4Value,
+    const std::vector<symbol::DimExpr>& out_dim_exprs,
+    const std::vector<pir::Value>& origin_inputs,
+    std::vector<pir::Value>* minial_inputs,
+    std::vector<pir::Attribute>* output_dim_expr_attrs,
+    GenerateShapeOp::SymbolBindings* symbol_bindings);
+
 }  // namespace cinn::dialect