[llvm] yaml2obj: Implement Coverage mapping format (PR #129472)

[Jessica Paquette via llvm-commits]

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@@ -0,0 +1,308 @@
+//===- CovMap.cpp - ObjectYAML Interface for coverage map -----------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Implementations of CovMap and encoder.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ObjectYAML/CovMap.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ObjectYAML/ELFYAML.h"
+#include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
+#include "llvm/ProfileData/InstrProf.h"
+#include "llvm/Support/Alignment.h"
+#include "llvm/Support/Endian.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#define COVMAP_V3
+
+using namespace llvm;
+using namespace llvm::coverage::yaml;
+using namespace llvm::covmap;
+
+void CounterTy::encode(raw_ostream &OS) const {
+  encodeULEB128(Tag | (Val << 2), OS);
+}
+
+void DecisionTy::encode(raw_ostream &OS) const {
+  encodeULEB128(BIdx, OS);
+  encodeULEB128(NC, OS);
+}
+
+void RecTy::encode(uint64_t &StartLoc, raw_ostream &OS) const {
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ornata wrote:

StartLoc not used?

https://github.com/llvm/llvm-project/pull/129472