[llvm] [LangRef] callbr result can be used in all successors (PR #91167)

[Eli Friedman via llvm-commits]

================
@@ -9113,8 +9113,8 @@ instruction in most regards. The primary difference is that it
 establishes an association with additional labels to define where control
 flow goes after the call.
 
-The output values of a '``callbr``' instruction are available only to
-the '``fallthrough``' block, not to any '``indirect``' blocks(s).
+The output values of a '``callbr``' instruction are available both on the
----------------
efriedma-quic wrote:

```suggestion
The output values of a '``callbr``' instruction are available both in the
```

https://github.com/llvm/llvm-project/pull/91167