From 49bb4290ce46b0e58f4817cbb46f3dada4f41409 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Fri, 2 Nov 2018 15:41:55 -0700
Subject: Fix asm2wasm handling of HEAP8[x >> 2] (#1720)

fixes kripken/emscripten#1718

The way fastcomp emits compareExchange is a little odd, we just need to ignore the shift.
---
 test/threads.asm.js | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'test/threads.asm.js')

diff --git a/test/threads.asm.js b/test/threads.asm.js
index 1253e8c42..bedeb7a37 100644
--- a/test/threads.asm.js
+++ b/test/threads.asm.js
@@ -137,6 +137,9 @@ Module["asm"] =  (function(global, env, buffer) {
    $temp = (Atomics_xor(HEAPU32, 1024, 0)|0);
    $temp = (Atomics_xor(HEAP16, 1024, 0)|0);
    $temp = (Atomics_xor(HEAPU8, 1024, 0)|0);
+   // corner cases
+   $temp = (Atomics_compareExchange(HEAP8, $temp | 0, 1, 2)|0);
+   $temp = (Atomics_compareExchange(HEAP8, $temp >> 2, 1, 2)|0);
   }
 
   return { test: test };
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