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// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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#include "src/tint/lang/spirv/writer/common/helper_test.h"
namespace tint::spirv::writer {
namespace {
using namespace tint::core::fluent_types; // NOLINT
using namespace tint::core::number_suffixes; // NOLINT
TEST_F(SpirvWriterTest, Discard) {
auto* buffer = b.Var("buffer", ty.ptr<storage, i32>());
buffer->SetBindingPoint(0, 0);
mod.root_block->Append(buffer);
auto* front_facing = b.FunctionParam("front_facing", ty.bool_());
front_facing->SetBuiltin(core::ir::FunctionParam::Builtin::kFrontFacing);
auto* ep = b.Function("ep", ty.f32(), core::ir::Function::PipelineStage::kFragment);
ep->SetParams({front_facing});
ep->SetReturnLocation(0_u, {});
b.Append(ep->Block(), [&] {
auto* ifelse = b.If(front_facing);
b.Append(ifelse->True(), [&] { //
b.Discard();
b.ExitIf(ifelse);
});
b.Store(buffer, 42_i);
b.Return(ep, 0.5_f);
});
ASSERT_TRUE(Generate()) << Error() << output_;
EXPECT_INST(R"(
%ep_inner = OpFunction %float None %16
%front_facing = OpFunctionParameter %bool
%17 = OpLabel
OpSelectionMerge %18 None
OpBranchConditional %front_facing %19 %18
%19 = OpLabel
OpStore %continue_execution %false
OpBranch %18
%18 = OpLabel
%21 = OpAccessChain %_ptr_StorageBuffer_int %1 %uint_0
%25 = OpLoad %bool %continue_execution
OpSelectionMerge %26 None
OpBranchConditional %25 %27 %26
%27 = OpLabel
OpStore %21 %int_42
OpBranch %26
%26 = OpLabel
%29 = OpLoad %bool %continue_execution
%30 = OpLogicalEqual %bool %29 %false
OpSelectionMerge %31 None
OpBranchConditional %30 %32 %31
%32 = OpLabel
OpKill
%31 = OpLabel
OpReturnValue %float_0_5
OpFunctionEnd
)");
}
TEST_F(SpirvWriterTest, DiscardBeforeAtomic) {
auto* buffer = b.Var("buffer", ty.ptr(storage, ty.atomic<i32>()));
buffer->SetBindingPoint(0, 0);
mod.root_block->Append(buffer);
auto* front_facing = b.FunctionParam("front_facing", ty.bool_());
front_facing->SetBuiltin(core::ir::FunctionParam::Builtin::kFrontFacing);
auto* ep = b.Function("ep", ty.f32(), core::ir::Function::PipelineStage::kFragment);
ep->SetParams({front_facing});
ep->SetReturnLocation(0_u, {});
b.Append(ep->Block(), [&] {
auto* ifelse = b.If(front_facing);
b.Append(ifelse->True(), [&] { //
b.Discard();
b.ExitIf(ifelse);
});
b.Call(ty.i32(), core::BuiltinFn::kAtomicAdd, buffer, 1_i);
b.Return(ep, 0.5_f);
});
ASSERT_TRUE(Generate()) << Error() << output_;
EXPECT_INST(R"(
; Function ep_inner
%ep_inner = OpFunction %float None %16
%front_facing = OpFunctionParameter %bool
%17 = OpLabel
OpSelectionMerge %18 None
OpBranchConditional %front_facing %19 %18
%19 = OpLabel
OpStore %continue_execution %false
OpBranch %18
%18 = OpLabel
%21 = OpAccessChain %_ptr_StorageBuffer_int %1 %uint_0
%25 = OpLoad %bool %continue_execution
OpSelectionMerge %26 None
OpBranchConditional %25 %27 %28
%27 = OpLabel
%29 = OpAtomicIAdd %int %21 %uint_1 %uint_0 %int_1
OpBranch %26
%28 = OpLabel
OpBranch %26
%26 = OpLabel
%32 = OpPhi %int %29 %27 %33 %28
%34 = OpLoad %bool %continue_execution
%35 = OpLogicalEqual %bool %34 %false
OpSelectionMerge %36 None
OpBranchConditional %35 %37 %36
%37 = OpLabel
OpKill
%36 = OpLabel
OpReturnValue %float_0_5
OpFunctionEnd
)");
}
} // namespace
} // namespace tint::spirv::writer