From a22ff68e9ee0735811dfe95b34eafe65e53108fc Mon Sep 17 00:00:00 2001
From: "Unknown W. Brackets" <checkins@unknownbrackets.org>
Date: Sun, 8 May 2016 18:48:05 -0700
Subject: [PATCH] jit-ir: Skip flushing when updating PC.

---
 Core/MIPS/IR/IRPassSimplify.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Core/MIPS/IR/IRPassSimplify.cpp b/Core/MIPS/IR/IRPassSimplify.cpp
index f6002fb46a..3ea09d11c5 100644
--- a/Core/MIPS/IR/IRPassSimplify.cpp
+++ b/Core/MIPS/IR/IRPassSimplify.cpp
@@ -273,7 +273,16 @@ bool PropagateConstants(const IRWriter &in, IRWriter &out) {
 			break;
 
 		case IROp::Downcount:
-			out.Write(inst);
+		case IROp::SetPCConst:
+			goto doDefault;
+
+		case IROp::SetPC:
+			if (gpr.IsImm(inst.src1)) {
+				out.Write(IROp::SetPCConst, out.AddConstant(gpr.GetImm(inst.src1)));
+			} else {
+				gpr.MapIn(inst.src1);
+				goto doDefault;
+			}
 			break;
 
 		// FP-only instructions don't need to flush immediates.