From 101b7745c4da1fdf0ebe723710fe8b195013fc0e Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Fri, 2 Mar 2018 13:40:03 -0500
Subject: add optnone noinline to async functions

this works around LLVM optimization assertion failures.
https://bugs.llvm.org/show_bug.cgi?id=36578

closes #800
---
 src/codegen.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/codegen.cpp')

diff --git a/src/codegen.cpp b/src/codegen.cpp
index 0cfd27322f..3aa8f63100 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -489,6 +489,10 @@ static LLVMValueRef fn_llvm_value(CodeGen *g, FnTableEntry *fn_table_entry) {
     } else {
         LLVMSetFunctionCallConv(fn_table_entry->llvm_value, get_llvm_cc(g, fn_type->data.fn.fn_type_id.cc));
     }
+    if (fn_type->data.fn.fn_type_id.cc == CallingConventionAsync) {
+        addLLVMFnAttr(fn_table_entry->llvm_value, "optnone");
+        addLLVMFnAttr(fn_table_entry->llvm_value, "noinline");
+    }
 
     bool want_cold = fn_table_entry->is_cold || fn_type->data.fn.fn_type_id.cc == CallingConventionCold;
     if (want_cold) {
-- 
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