From 7004c3fe3148b1f081c1575341257dca18e804b2 Mon Sep 17 00:00:00 2001
From: Richard Weickelt <richard@weickelt.de>
Date: Tue, 28 Jul 2020 22:39:01 +0200
Subject: [PATCH] Fix LTO Build of QtScript

When building with link-time optimization, the function cti_vm_throw was
thrown away because it was only referenced by assembly code. The
function needs to be marked as used.

Fixes: QTBUG-42989
Change-Id: I9974a5db9105adf9079343b5e1564e58f419df97
---
 src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
index da801332..adf6d5dc 100644
--- a/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
+++ b/src/3rdparty/javascriptcore/JavaScriptCore/jit/JITStubs.h
@@ -123,7 +123,7 @@ namespace JSC {
         JSValue* exception;
         Profiler** enabledProfilerReference;
         JSGlobalData* globalData;
-        
+
         // When JIT code makes a call, it pushes its return address just below the rest of the stack.
         ReturnAddressPtr* returnAddressSlot() { return reinterpret_cast<ReturnAddressPtr*>(this) - 1; }
     };
@@ -155,7 +155,7 @@ namespace JSC {
         // These arguments passed on the stack.
         Profiler** enabledProfilerReference;
         JSGlobalData* globalData;
-        
+
         ReturnAddressPtr* returnAddressSlot() { return &thunkReturnAddress; }
     };
 #elif CPU(ARM_TRADITIONAL)
@@ -316,7 +316,7 @@ extern "C" {
     EncodedJSValue JIT_STUB cti_op_to_primitive(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_typeof(STUB_ARGS_DECLARATION);
     EncodedJSValue JIT_STUB cti_op_urshift(STUB_ARGS_DECLARATION);
-    EncodedJSValue JIT_STUB cti_vm_throw(STUB_ARGS_DECLARATION);
+    EncodedJSValue JIT_STUB cti_vm_throw(STUB_ARGS_DECLARATION) __attribute__((used));
     EncodedJSValue JIT_STUB cti_to_object(STUB_ARGS_DECLARATION);
     JSObject* JIT_STUB cti_op_construct_JSConstruct(STUB_ARGS_DECLARATION);
     JSObject* JIT_STUB cti_op_new_array(STUB_ARGS_DECLARATION);
-- 
2.16.3