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

[Nikita Popov]

================
@@ -977,8 +977,15 @@ void ModuleBitcodeWriter::writeAttributeGroupTable() {
         Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
       } else if (Attr.isIntAttribute()) {
         Record.push_back(1);
-        Record.push_back(getAttrKindEncoding(Attr.getKindAsEnum()));
-        Record.push_back(Attr.getValueAsInt());
+        Attribute::AttrKind Kind = Attr.getKindAsEnum();
+        Record.push_back(getAttrKindEncoding(Kind));
+        if (Kind == Attribute::Memory) {
+          // Version field for upgrading old memory effects.
+          const uint64_t Version = 1 << 0;
----------------
nikic wrote:

```suggestion
          const uint64_t Version = 1;
```

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