From 2db88904535724e9ce1070aee59f11a21a721291 Mon Sep 17 00:00:00 2001
From: drmortalwombat <90205530+drmortalwombat@users.noreply.github.com>
Date: Mon, 24 Mar 2025 08:56:03 +0100
Subject: [PATCH] Fix temp spilling in recursive functions

---
 include/opp/boundint.h         | 7 +++++++
 oscar64/InterCodeGenerator.cpp | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/opp/boundint.h b/include/opp/boundint.h
index 4f9f5bd..1353b20 100644
--- a/include/opp/boundint.h
+++ b/include/opp/boundint.h
@@ -39,6 +39,13 @@ namespace opp {
 			v = k;
 		}
 
+		void operator-=(int k)
+		{
+			k = v - k;
+			__assume(k >= tmin && k <= tmax);
+			v = k;
+		}
+
 		operator int() const
 		{
 			int k = v;
diff --git a/oscar64/InterCodeGenerator.cpp b/oscar64/InterCodeGenerator.cpp
index 13b96f7..7b6f71e 100644
--- a/oscar64/InterCodeGenerator.cpp
+++ b/oscar64/InterCodeGenerator.cpp
@@ -5971,7 +5971,7 @@ InterCodeProcedure* InterCodeGenerator::TranslateProcedure(InterCodeModule * mod
 	if (dec->mFlags & DTF_FUNC_INTRCALLED)
 		proc->mInterruptCalled = true;
 	
-	if (dec->mFlags & DTF_DYNSTACK)
+	if ((dec->mFlags & DTF_DYNSTACK) || (dec->mFlags & DTF_FUNC_RECURSIVE))
 		proc->mDynamicStack = true;
 
 	if ((dec->mFlags & DTF_PREVENT_INLINE) || (dec->mBase->mFlags & DTF_VARIADIC))