[llvm] Fix compress/decompress in LLVM Offloading API (PR #150064)

[James Henderson via llvm-commits]

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@@ -260,11 +299,233 @@ static std::string formatWithCommas(unsigned long long Value) {
 }
 
 llvm::Expected<std::unique_ptr<llvm::MemoryBuffer>>
-CompressedOffloadBundle::decompress(llvm::MemoryBufferRef &Input,
+CompressedOffloadBundle::compress(llvm::compression::Params P,
+                                  const llvm::MemoryBuffer &Input,
+                                  uint16_t Version, bool Verbose) {
+  if (!llvm::compression::zstd::isAvailable() &&
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jh7370 wrote:

What's with all the `llvm::` qualifiers throughout this function? You've done `using namespace llvm` at the top of the file...

https://github.com/llvm/llvm-project/pull/150064