From a1b88267bb977cb5fdba614b5f61fa7c84f51bf6 Mon Sep 17 00:00:00 2001
From: Alon Zakai <azakai@google.com>
Date: Mon, 7 Oct 2024 15:37:53 -0700
Subject: Add explicit errors on unhandled instructions in Flatten (#6992)

This error makes #6989 less confusing.
---
 src/passes/Flatten.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/passes/Flatten.cpp')

diff --git a/src/passes/Flatten.cpp b/src/passes/Flatten.cpp
index 8ddd8632a..37fa15b11 100644
--- a/src/passes/Flatten.cpp
+++ b/src/passes/Flatten.cpp
@@ -329,6 +329,11 @@ struct Flatten
       }
     }
 
+    if (curr->is<BrOn>() || curr->is<TryTable>()) {
+      Fatal() << "Unsupported instruction for Flatten: "
+              << getExpressionName(curr);
+    }
+
     // continue for general handling of everything, control flow or otherwise
     curr = getCurrent(); // we may have replaced it
     // we have changed children
-- 
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