[Mlir-commits] [mlir] [MLIR][LLVM] Fold extract of constant (PR #127927)

[Christian Ulmann]

================
@@ -1932,6 +1932,20 @@ OpFoldResult LLVM::ExtractValueOp::fold(FoldAdaptor adaptor) {
     getContainerMutable().set(extractValueOp.getContainer());
     return getResult();
   }
+
+  {
+    DenseElementsAttr constval;
+    matchPattern(getContainer(), m_Constant(&constval));
+    if (constval && constval.getElementType() == getType()) {
+      if (isa<SplatElementsAttr>(constval)) {
+        return constval.getSplatValue<Attribute>();
+      }
----------------
Dinistro wrote:

```suggestion
      if (isa<SplatElementsAttr>(constval))
        return constval.getSplatValue<Attribute>();
```

https://github.com/llvm/llvm-project/pull/127927