From 2bb7ea436dc74f812a8092201dc597ed58ff3c7a Mon Sep 17 00:00:00 2001
From: Liam <byteslice@airmail.cc>
Date: Sat, 10 Jun 2023 11:40:58 -0400
Subject: shader_recompiler: remove barriers in conditional control flow when
device lacks support
---
.../ir_opt/conditional_barrier_pass.cpp | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 src/shader_recompiler/ir_opt/conditional_barrier_pass.cpp
(limited to 'src/shader_recompiler/ir_opt/conditional_barrier_pass.cpp')
diff --git a/src/shader_recompiler/ir_opt/conditional_barrier_pass.cpp b/src/shader_recompiler/ir_opt/conditional_barrier_pass.cpp
new file mode 100644
index 0000000000..c3ed27f4f2
--- /dev/null
+++ b/src/shader_recompiler/ir_opt/conditional_barrier_pass.cpp
@@ -0,0 +1,44 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "shader_recompiler/frontend/ir/program.h"
+#include "shader_recompiler/ir_opt/passes.h"
+
+namespace Shader::Optimization {
+
+void ConditionalBarrierPass(IR::Program& program) {
+ s32 conditional_control_flow_count{0};
+ s32 conditional_return_count{0};
+ for (IR::AbstractSyntaxNode& node : program.syntax_list) {
+ switch (node.type) {
+ case IR::AbstractSyntaxNode::Type::If:
+ case IR::AbstractSyntaxNode::Type::Loop:
+ conditional_control_flow_count++;
+ break;
+ case IR::AbstractSyntaxNode::Type::EndIf:
+ case IR::AbstractSyntaxNode::Type::Repeat:
+ conditional_control_flow_count--;
+ break;
+ case IR::AbstractSyntaxNode::Type::Unreachable:
+ case IR::AbstractSyntaxNode::Type::Return:
+ if (conditional_control_flow_count > 0) {
+ conditional_return_count++;
+ }
+ break;
+ case IR::AbstractSyntaxNode::Type::Block:
+ for (IR::Inst& inst : node.data.block->Instructions()) {
+ if ((conditional_control_flow_count > 0 || conditional_return_count > 0) &&
+ inst.GetOpcode() == IR::Opcode::Barrier) {
+ LOG_WARNING(Shader, "Barrier within conditional control flow");
+ inst.ReplaceOpcode(IR::Opcode::Identity);
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ ASSERT(conditional_control_flow_count == 0);
+}
+
+} // namespace Shader::Optimization
--
cgit v1.2.3-70-g09d2