From 5c3a9a1a3eef82ffad17bc295da05ecccd9006a5 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <andrew@ziglang.org>
Date: Sat, 31 Aug 2019 18:50:16 -0400
Subject: improvements to `@asyncCall`

 * `await @asyncCall` generates better code. See #3065
 * `@asyncCall` works with a real `@Frame(func)` in addition to
   a byte slice. Closes #3072
 * `@asyncCall` allows passing `{}` (a void value) as the result
   pointer, which uses the result location inside the frame.
   Closes #3068
 * support `await @asyncCall` on a non-async function. This is in
   preparation for safe recursion (#1006).
---
 src/analyze.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/analyze.cpp')

diff --git a/src/analyze.cpp b/src/analyze.cpp
index df5b27784a..dfdf06aa5a 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -5727,6 +5727,10 @@ static Error resolve_async_frame(CodeGen *g, ZigType *frame_type) {
 
     for (size_t i = 0; i < fn->call_list.length; i += 1) {
         IrInstructionCallGen *call = fn->call_list.at(i);
+        if (call->new_stack != nullptr) {
+            // don't need to allocate a frame for this
+            continue;
+        }
         ZigFn *callee = call->fn_entry;
         if (callee == nullptr) {
             add_node_error(g, call->base.source_node,
-- 
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