Initial Commit

thirdparty/capstone/suite/synctools/tablegen/include/llvm/CodeGen/CostTable.h

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+//===-- CostTable.h - Instruction Cost Table handling -----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Cost tables and simple lookup functions
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_COSTTABLE_H_
+#define LLVM_CODEGEN_COSTTABLE_H_
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/MachineValueType.h"
+
+namespace llvm {
+
+/// Cost Table Entry
+template <typename CostType>
+struct CostTblEntryT {
+  int ISD;
+  MVT::SimpleValueType Type;
+  CostType Cost;
+};
+using CostTblEntry = CostTblEntryT<unsigned>;
+
+/// Find in cost table.
+template <class CostType>
+inline const CostTblEntryT<CostType> *
+CostTableLookup(ArrayRef<CostTblEntryT<CostType>> Tbl, int ISD, MVT Ty) {
+  auto I = find_if(Tbl, [=](const CostTblEntryT<CostType> &Entry) {
+    return ISD == Entry.ISD && Ty == Entry.Type;
+  });
+  if (I != Tbl.end())
+    return I;
+
+  // Could not find an entry.
+  return nullptr;
+}
+
+template <size_t N, class CostType>
+inline const CostTblEntryT<CostType> *
+CostTableLookup(const CostTblEntryT<CostType> (&Table)[N], int ISD, MVT Ty) {
+  // Wrapper to fix template argument deduction failures.
+  return CostTableLookup<CostType>(makeArrayRef(Table), ISD, Ty);
+}
+
+/// Type Conversion Cost Table
+template <typename CostType>
+struct TypeConversionCostTblEntryT {
+  int ISD;
+  MVT::SimpleValueType Dst;
+  MVT::SimpleValueType Src;
+  CostType Cost;
+};
+using TypeConversionCostTblEntry = TypeConversionCostTblEntryT<unsigned>;
+
+/// Find in type conversion cost table.
+template <class CostType>
+inline const TypeConversionCostTblEntryT<CostType> *
+ConvertCostTableLookup(ArrayRef<TypeConversionCostTblEntryT<CostType>> Tbl,
+                       int ISD, MVT Dst, MVT Src) {
+  auto I =
+      find_if(Tbl, [=](const TypeConversionCostTblEntryT<CostType> &Entry) {
+        return ISD == Entry.ISD && Src == Entry.Src && Dst == Entry.Dst;
+      });
+  if (I != Tbl.end())
+    return I;
+
+  // Could not find an entry.
+  return nullptr;
+}
+
+template <size_t N, class CostType>
+inline const TypeConversionCostTblEntryT<CostType> *
+ConvertCostTableLookup(const TypeConversionCostTblEntryT<CostType> (&Table)[N],
+                       int ISD, MVT Dst, MVT Src) {
+  // Wrapper to fix template argument deduction failures.
+  return ConvertCostTableLookup<CostType>(makeArrayRef(Table), ISD, Dst, Src);
+}
+
+} // namespace llvm
+
+#endif /* LLVM_CODEGEN_COSTTABLE_H_ */