From 1ff88982fe07b341c79345277f857211eccc5a5e Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@mozilla.com>
Date: Fri, 12 Nov 2010 10:15:40 -0800
Subject: [PATCH] Stop translating a block when a sub-statement terminates the
 llvm bb.

---
 src/comp/middle/trans.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index bd1836b5cbe..17d1a141125 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -1131,6 +1131,11 @@ impure fn trans_block(@block_ctxt cx, &ast.block b) -> result {
     for (@ast.stmt s in b.node.stmts) {
         r = trans_stmt(bcx, *s);
         bcx = r.bcx;
+        // If we hit a terminator, control won't go any further so
+        // we're in dead-code land. Stop here.
+        if (is_terminated(bcx)) {
+            ret r;
+        }
     }
 
     bcx = trans_block_cleanups(bcx);