[llvm] [Exegesis] Add supports to serialize/deserialize object files into benchmarks (PR #121993)

[Craig Topper via llvm-commits]

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@@ -364,6 +403,52 @@ Benchmark::readTriplesAndCpusFromYamls(MemoryBufferRef Buffer) {
   return Result;
 }
 
+Error Benchmark::setObjectFile(StringRef RawBytes) {
+  SmallVector<uint8_t> CompressedBytes;
+  llvm::compression::Format CompressionFormat;
+
+  auto isFormatAvailable = [](llvm::compression::Format F) -> bool {
+    switch (F) {
+    case compression::Format::Zstd:
+      return compression::zstd::isAvailable();
+    case compression::Format::Zlib:
+      return compression::zlib::isAvailable();
+    }
+  };
+  if (ForceObjectFileCompressionFormat.getNumOccurrences() > 0) {
+    CompressionFormat = ForceObjectFileCompressionFormat;
+    if (!isFormatAvailable(CompressionFormat))
+      return make_error<StringError>(
+          "The designated compression format is not available.",
+          inconvertibleErrorCode());
+  } else if (isFormatAvailable(compression::Format::Zstd)) {
+    // Try newer compression algorithm first.
+    CompressionFormat = compression::Format::Zstd;
+  } else if (isFormatAvailable(compression::Format::Zlib)) {
+    CompressionFormat = compression::Format::Zlib;
+  } else {
+    return make_error<StringError>(
+        "None of the compression methods is available.",
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topperc wrote:

is -> are

https://github.com/llvm/llvm-project/pull/121993