Commit d97441d37e

@@ -24581,8 +24581,12 @@ fn zirSplat(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Air.I
 
     const len = try sema.usizeCast(block, src, dest_ty.arrayLen(zcu));
 
-    // `len == 0` because `[0:s]T` always has a comptime-known splat.
-    if (!dest_ty.hasRuntimeBits(zcu) or len == 0) {
+    if (try sema.typeHasOnePossibleValue(dest_ty)) |val| {
+        return Air.internedToRef(val.toIntern());
+    }
+
+    // We also need this case because `[0:s]T` is not OPV.
+    if (len == 0) {
         const empty_aggregate = try pt.intern(.{ .aggregate = .{
             .ty = dest_ty.toIntern(),
             .storage = .{ .elems = &.{} },