From a96fe1a8422140072db7ad7db421378b87898a0d Mon Sep 17 00:00:00 2001
From: Will Cohen <willcohen@users.noreply.github.com>
Date: Wed, 4 Jan 2023 13:47:47 -0500
Subject: wasm2js: Avoid emitting non-JS code during opt (#5378)

As noted in #4806, trying to optimize past level 0 can result in
passes emitting non-JS code, which is then unable to be converted during
final output.

This commit creates a new targetJS option in PassOptions, which can
be checked inside each pass where non-JS code might be emitted.

This commit initially adds that logic to OptimizeInstructions, where
this issue was first noticed.
---
 test/wasm2js/target_js.2asm.js.opt | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 test/wasm2js/target_js.2asm.js.opt

(limited to 'test/wasm2js/target_js.2asm.js.opt')

diff --git a/test/wasm2js/target_js.2asm.js.opt b/test/wasm2js/target_js.2asm.js.opt
new file mode 100644
index 000000000..12e1a475b
--- /dev/null
+++ b/test/wasm2js/target_js.2asm.js.opt
@@ -0,0 +1,27 @@
+
+function asmFunc(imports) {
+ var Math_imul = Math.imul;
+ var Math_fround = Math.fround;
+ var Math_abs = Math.abs;
+ var Math_clz32 = Math.clz32;
+ var Math_min = Math.min;
+ var Math_max = Math.max;
+ var Math_floor = Math.floor;
+ var Math_ceil = Math.ceil;
+ var Math_trunc = Math.trunc;
+ var Math_sqrt = Math.sqrt;
+ var nan = NaN;
+ var infinity = Infinity;
+ function func($0) {
+  $0 = $0 | 0;
+  return 1 << $0 ^ -1;
+ }
+ 
+ return {
+  "func": func
+ };
+}
+
+var retasmFunc = asmFunc({
+});
+export var func = retasmFunc.func;
-- 
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