From e4e45bcc59cd2e629dd3eca1d39263b3385a4ee6 Mon Sep 17 00:00:00 2001
From: Simon Scherer <git69566@pinebound.com>
Date: Thu, 3 Sep 2026 11:20:41 +0200
Subject: [PATCH] x87StackOptimizationPass: Set both operands as valid in the
 tag word for FXCH

---
 .../Source/Interface/IR/Passes/x87StackOptimizationPass.cpp   | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/FEXCore/Source/Interface/IR/Passes/x87StackOptimizationPass.cpp b/FEXCore/Source/Interface/IR/Passes/x87StackOptimizationPass.cpp
index dfaf74a96..8dcc220e3 100644
--- a/FEXCore/Source/Interface/IR/Passes/x87StackOptimizationPass.cpp
+++ b/FEXCore/Source/Interface/IR/Passes/x87StackOptimizationPass.cpp
@@ -1074,8 +1074,8 @@ void X87StackOptimization::Run(IREmitter* Emit) {
           // Slow path: do actual memory operations
           Ref ValueTop = LoadStackValue();
           Ref ValueOffset = LoadStackValue(Offset);
-          StoreStackValue(ValueOffset);
-          StoreStackValue(ValueTop, Offset);
+          StoreStackValue(ValueOffset, 0, true);
+          StoreStackValue(ValueTop, Offset, true);
         } else {
           // Fast path: swap complete StackMemberInfo preserving Source metadata
           StackData.setTop(StackMemberOffset, 0);