diff --git a/include/audio/sidfx.c b/include/audio/sidfx.c
index e2e5a5e..a1be2c8 100644
--- a/include/audio/sidfx.c
+++ b/include/audio/sidfx.c
@@ -29,6 +29,11 @@ void sidfx_init(void)
 	}
 }
 
+bool sidfx_idle(byte chn)
+{
+	return channels[chn].state == SIDFX_IDLE;
+}
+
 void sidfx_play(byte chn, const SIDFX * fx, byte cnt)
 {
 	SIDFXState		ns = channels[chn].state;
diff --git a/include/audio/sidfx.h b/include/audio/sidfx.h
index 729afe6..97dbcb9 100644
--- a/include/audio/sidfx.h
+++ b/include/audio/sidfx.h
@@ -14,6 +14,8 @@ struct SIDFX
 
 void sidfx_init(void);
 
+inline bool sidfx_idle(byte chn);
+
 inline void sidfx_play(byte chn, const SIDFX * fx, byte cnt);
 
 void sidfx_stop(byte chn);
diff --git a/oscar64/NativeCodeGenerator.cpp b/oscar64/NativeCodeGenerator.cpp
index 524e9ce..1b821e6 100644
--- a/oscar64/NativeCodeGenerator.cpp
+++ b/oscar64/NativeCodeGenerator.cpp
@@ -48519,7 +48519,7 @@ void NativeCodeProcedure::Compile(InterCodeProcedure* proc)
 	mInterProc = proc;
 	mInterProc->mLinkerObject->mNativeProc = this;
 
-	CheckFunc = !strcmp(mInterProc->mIdent->mString, "flossiec_read_lzo");
+	CheckFunc = !strcmp(mInterProc->mIdent->mString, "main");
 
 	int	nblocks = proc->mBlocks.Size();
 	tblocks = new NativeCodeBasicBlock * [nblocks];
@@ -49773,6 +49773,13 @@ void NativeCodeProcedure::Optimize(void)
 			changed = true;
 #endif
 
+		if (step == 2 && !changed)
+		{
+			ResetVisited();
+			if (mEntryBlock->CombineSameXY())
+				changed = true;
+		}
+
 #if 1
 		if (step >= 5)
 		{