From a8d46a5eae4e0d65c08f6574cffc48bc55d00940 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 19 Apr 2021 16:36:57 -0300
Subject: shader: Add constant propagation for arithmetic right shifts

---
 src/shader_recompiler/ir_opt/constant_propagation_pass.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/shader_recompiler/ir_opt')

diff --git a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
index 7e86f64a8..2206f93c2 100644
--- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
+++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
@@ -482,6 +482,9 @@ void ConstantPropagation(IR::Block& block, IR::Inst& inst) {
     case IR::Opcode::IMul32:
         FoldWhenAllImmediates(inst, [](u32 a, u32 b) { return a * b; });
         return;
+    case IR::Opcode::ShiftRightArithmetic32:
+        FoldWhenAllImmediates(inst, [](s32 a, s32 b) { return static_cast<u32>(a >> b); });
+        return;
     case IR::Opcode::BitCastF32U32:
         return FoldBitCast<IR::Opcode::BitCastF32U32, f32, u32>(inst, IR::Opcode::BitCastU32F32);
     case IR::Opcode::BitCastU32F32:
-- 
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