[Mlir-commits] [llvm] [mlir] [IR][ModRef] Introduce `errno` memory location (PR #120783)

[Nikita Popov]

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@@ -2398,9 +2397,28 @@ Error BitcodeReader::parseAttributeGroupBlock() {
             B.addUWTableAttr(UWTableKind(Record[++i]));
           else if (Kind == Attribute::AllocKind)
             B.addAllocKindAttr(static_cast<AllocFnKind>(Record[++i]));
-          else if (Kind == Attribute::Memory)
-            B.addMemoryAttr(MemoryEffects::createFromIntValue(Record[++i]));
-          else if (Kind == Attribute::Captures)
+          else if (Kind == Attribute::Memory) {
+            uint64_t EncodedME = Record[++i];
+            const uint8_t Version = (EncodedME >> 56);
+            if (Version < 1) {
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nikic wrote:

```suggestion
            if (Version == 0) {
```

https://github.com/llvm/llvm-project/pull/120783