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

[Joseph Huber via llvm-commits]

================
@@ -106,9 +125,15 @@ class OffloadBundleFatBin {
       Entry.dumpURI(outs(), FileName);
   }
 
-  OffloadBundleFatBin(MemoryBufferRef Source, StringRef File)
-      : FileName(File), NumberOfEntries(0),
-        Entries(SmallVector<OffloadBundleEntry>()) {}
+  OffloadBundleFatBin(MemoryBufferRef Source, StringRef File,
+                      bool Decompress = false)
+      : FileName(File), Decompressed(Decompress), NumberOfEntries(0),
+        Entries(SmallVector<OffloadBundleEntry>()) {
+    if (Decompress) {
+      DecompressedBuffer =
+          MemoryBuffer::getMemBufferCopy(Source.getBuffer(), File);
+    }
----------------
jhuber6 wrote:

```suggestion
    if (Decompress)
      DecompressedBuffer =
          MemoryBuffer::getMemBufferCopy(Source.getBuffer(), File);
```

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