[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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@@ -0,0 +1,153 @@
+//===- llvm/Support/Range.cpp - 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/Range.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/Regex.h"
+#include "llvm/Support/raw_ostream.h"
+#include <sstream>
+
+using namespace llvm;
+
+Expected<RangeUtils::RangeList> RangeUtils::parseRanges(const StringRef Str,
+                                                        const char Separator) {
+  RangeList Ranges;
+
+  if (Str.empty())
+    return std::move(Ranges);
+
+  // Split by the specified separator
+  SmallVector<StringRef, 8> Parts;
+  Str.split(Parts, Separator, -1, false);
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nikic wrote:

There is an iterator variant of this, no need to collect into a vector.

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