From 4b108460089056475504e7cd007155c774bc1128 Mon Sep 17 00:00:00 2001
From: Robin Kertels <robin.kertels@gmail.com>
Date: Fri, 26 May 2023 00:41:07 +0200
Subject: [PATCH] [dxso] Fix RT mask for SM1

---
 src/dxso/dxso_module.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/dxso/dxso_module.cpp b/src/dxso/dxso_module.cpp
index 4cc6eb3e7..d3ed812f2 100644
--- a/src/dxso/dxso_module.cpp
+++ b/src/dxso/dxso_module.cpp
@@ -38,10 +38,14 @@ namespace dxvk {
     m_constants       = compiler->constants();
     m_maxDefinedConst = compiler->maxDefinedConstant();
     m_usedSamplers    = compiler->usedSamplers();
-    m_usedRTs         = compiler->usedRTs();
 
     compiler->finalize();
 
+    // SM 1 doesn't have explicit output registers and uses R0 instead.
+    // The shader compiler emits the C0 write in finalize, so we have to get the rt mask
+    // after that.
+    m_usedRTs = compiler->usedRTs();
+
     return compiler->compile();
   }