[llvm] [LLVM][IR] Add textual shorthand for specifying constant vector splats. (PR #74620)

[Nikita Popov via llvm-commits]

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@@ -5824,6 +5839,17 @@ bool LLParser::convertValIDToValue(Type *Ty, ValID &ID, Value *&V,
                                "' but expected '" + getTypeString(Ty) + "'");
     V = ID.ConstantVal;
     return false;
+  case ValID::t_ConstantSplat:
+    if (!Ty->isVectorTy())
+      return error(ID.Loc, "vector constant must have vector type");
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nikic wrote:

If you feel like it, we could test these error conditions, but I'm not going to insist...

https://github.com/llvm/llvm-project/pull/74620