qt5-qtdeclarative/qt-QTBUG-111935-fix-V4-jit.patch
2023-03-15 08:59:34 -04:00

45 lines
1.5 KiB
Diff

From e2bdde18d9758efdc6a0d7d106aad56995df1271 Mon Sep 17 00:00:00 2001
From: Ulf Hermann <ulf.hermann@qt.io>
Date: Wed, 15 Mar 2023 08:59:43 +0100
Subject: [PATCH] JIT: Add missing {STORE|LOAD}_ACC() to CreateCallContext
We cannot assume anything about the accumulator register after calling
PushCallContext::call(). Also add a note about not needing to re-load
the accumulator on ThrowException.
Pick-to: 6.5 6.2 5.15
Fixes: QTBUG-111935
Change-Id: I7196585e1d2697c215f4fe87d8d7ac9b98b622a3
---
src/qml/jit/qv4baselinejit.cpp | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/qml/jit/qv4baselinejit.cpp b/src/qml/jit/qv4baselinejit.cpp
index 14e183adb8..1d65169dce 100644
--- a/src/qml/jit/qv4baselinejit.cpp
+++ b/src/qml/jit/qv4baselinejit.cpp
@@ -506,6 +506,8 @@ void BaselineJIT::generate_ThrowException()
as->passEngineAsArg(0);
BASELINEJIT_GENERATE_RUNTIME_CALL(ThrowException, CallResultDestination::Ignore);
as->gotoCatchException();
+
+ // LOAD_ACC(); <- not needed here since it would be unreachable.
}
void BaselineJIT::generate_GetException() { as->getException(); }
@@ -513,9 +515,11 @@ void BaselineJIT::generate_SetException() { as->setException(); }
void BaselineJIT::generate_CreateCallContext()
{
+ STORE_ACC();
as->prepareCallWithArgCount(1);
as->passCppFrameAsArg(0);
BASELINEJIT_GENERATE_RUNTIME_CALL(PushCallContext, CallResultDestination::Ignore);
+ LOAD_ACC();
}
void BaselineJIT::generate_PushCatchContext(int index, int name) { as->pushCatchContext(index, name); }
--
2.39.2