[llvm] [OptBisect] Add support for selecting ranges of passes and refactor DebugCounter to use a shared Range API. (PR #152393)

[Nikita Popov via llvm-commits]

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+//===- llvm/Support/Range.h - Range parsing utility -----------*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides utilities for parsing range specifications like
+// "1-10,20-30,45" which are commonly used in debugging and bisection tools.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_RANGE_H
+#define LLVM_SUPPORT_RANGE_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Error.h"
+#include <cassert>
+#include <cstdint>
+#include <limits>
+
+namespace llvm {
+class raw_ostream;
+} // end namespace llvm
+
+namespace llvm {
+
+/// Represents a range of integers [Begin, End], inclusive on both ends, where
+/// Begin <= End.
+class Range {
+  int64_t Begin;
+  int64_t End;
+
+public:
+  /// Create a range [Begin, End].
+  Range(int64_t Begin, int64_t End) : Begin(Begin), End(End) {
+    assert(Begin <= End && "Range Begin must be <= End");
+  }
+  /// Create a range [Single, Single].
+  Range(int64_t Single) : Begin(Single), End(Single) {}
+
+  int64_t getBegin() const { return Begin; }
+  int64_t getEnd() const { return End; }
+
+  void setBegin(int64_t NewBegin) {
+    assert(NewBegin <= End && "Range Begin must be <= End");
+    Begin = NewBegin;
+  }
+  void setEnd(int64_t NewEnd) {
+    assert(Begin <= NewEnd && "Range Begin must be <= End");
+    End = NewEnd;
+  }
+
+  /// Check if the given value is within this range (inclusive).
+  bool contains(int64_t Value) const { return Value >= Begin && Value <= End; }
+
+  /// Check if this range overlaps with another range.
+  bool overlaps(const Range &Other) const {
+    return Begin <= Other.End && End >= Other.Begin;
+  }
+
+  /// Get the size of this range.
+  uint64_t size() const {
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nikic wrote:

Is this actually needed by anything?

https://github.com/llvm/llvm-project/pull/152393