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[ir] Add a Register class. 

This CL adds a class to store register information for the IR. The
register can hold various types of data depending on if it's a f32, i32,
temporary, etc register.

Bug: tint:1718
Change-Id: I025af70f2b145c9697f1d7f996d0e98022eea829
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110782
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
This commit is contained in:
dan sinclair 2022-11-22 20:43:49 +00:00 committed by Dawn LUCI CQ
parent 2664229fd5
commit 840bf6fc6d
4 changed files with 364 additions and 0 deletions
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3
src/tint/CMakeLists.txt
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@ -666,6 +666,8 @@ if(${TINT_BUILD_IR})
ir/loop.h
ir/module.cc
ir/module.h
ir/register.cc
ir/register.h
ir/switch.cc
ir/switch.h
ir/terminator.cc
@ -1330,6 +1332,7 @@ if(TINT_BUILD_TESTS)
if (${TINT_BUILD_IR})
list(APPEND TINT_TEST_SRCS
ir/builder_impl_test.cc
ir/register_test.cc
ir/test_helper.h
)
endif()

64
src/tint/ir/register.cc Normal file
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@ -0,0 +1,64 @@
// Copyright 2022 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/ir/register.h"
namespace tint::ir {
Register::Register(Id id) : kind_(Kind::kTemp), data_(id) {}
Register::Register(f32 f) : kind_(Kind::kF32), data_(f) {}
Register::Register(f16 f) : kind_(Kind::kF16), data_(f) {}
Register::Register(u32 u) : kind_(Kind::kU32), data_(u) {}
Register::Register(i32 i) : kind_(Kind::kI32), data_(i) {}
Register::Register(bool b) : kind_(Kind::kBool), data_(b) {}
Register::Register(Symbol s, Id id) : kind_(Kind::kVar), data_(VarData{s, id}) {}
Register::~Register() = default;
Register::Register(const Register& o) = default;
Register::Register(Register&& o) = default;
Register& Register::operator=(const Register& o) = default;
Register& Register::operator=(Register&& o) = default;
std::string Register::AsString() const {
switch (kind_) {
case Kind::kTemp:
return "%" + std::to_string(AsId());
case Kind::kF32:
return std::to_string(AsF32().value);
case Kind::kF16:
return std::to_string(AsF16().value);
case Kind::kI32:
return std::to_string(AsI32().value);
case Kind::kU32:
return std::to_string(AsU32().value);
// TODO(dsinclair): Emit the symbol instead of v
case Kind::kVar:
return "%v" + std::to_string(AsVarData().id);
case Kind::kBool:
return AsBool() ? "true" : "false";
}
return "unknown register";
}
} // namespace tint::ir

161
src/tint/ir/register.h Normal file
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@ -0,0 +1,161 @@
// Copyright 2022 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_TINT_IR_REGISTER_H_
#define SRC_TINT_IR_REGISTER_H_
#include <string>
#include <variant>
#include "src/tint/number.h"
#include "src/tint/symbol.h"
namespace tint::ir {
/// Register in the IR. The register can be one of several types these include, but aren't limited
/// to, `f32`, `u32`, `temp`, `var`. The type of the register determines the type of data stored
/// in the register.
class Register {
public:
/// A register id.
using Id = uint32_t;
/// Stores data for a given variable. There will be multiple `VarData` entries for a given `id`.
/// The `id` acts like a generation number (although they aren't sequential, they are
/// increasing). As the variable is stored too a new register will be created and the the `id`
/// will be incremented.
struct VarData {
/// The symbol for the variable
Symbol sym;
/// The id for the variable.
Id id;
// TODO(dsinclair): Should var type data be stored here along side the variable info?
};
/// Constructor
/// @param id the id for the register
explicit Register(Id id);
/// Constructor
/// @param s the symbol for the register
/// @param id the id for the register
Register(Symbol s, Id id);
/// Constructor
/// @param b the `bool` value to store in the register
explicit Register(bool b);
/// Constructor
/// @param f the `f32` value to store in the register
explicit Register(f32 f);
/// Constructor
/// @param f the `f16` value to store in the register
explicit Register(f16 f);
/// Constructor
/// @param u the `u32` value to store in the register
explicit Register(u32 u);
/// Constructor
/// @param i the `i32` value to store in the register
explicit Register(i32 i);
/// Destructor
~Register();
/// Copy constructor
/// @param o the register to copy from
Register(const Register& o);
/// Move constructor
/// @param o the register to move from
Register(Register&& o);
/// Copy assign
/// @param o the register to copy from
/// @returns this
Register& operator=(const Register& o);
/// Move assign
/// @param o the register to move from
/// @returns this
Register& operator=(Register&& o);
/// @returns true if this is a temporary register
bool IsTemp() const { return kind_ == Kind::kTemp; }
/// @returns true if this is a f32 register
bool IsF32() const { return kind_ == Kind::kF32; }
/// @returns true if this is a f16 register
bool IsF16() const { return kind_ == Kind::kF16; }
/// @returns true if this is an i32 register
bool IsI32() const { return kind_ == Kind::kI32; }
/// @returns true if this is a u32 register
bool IsU32() const { return kind_ == Kind::kU32; }
/// @returns true if this is a var register
bool IsVar() const { return kind_ == Kind::kVar; }
/// @returns true if this is a bool register
bool IsBool() const { return kind_ == Kind::kBool; }
/// @returns the register data as a `f32`.
/// @note, must only be called if `IsF32()` is true
f32 AsF32() const { return std::get<f32>(data_); }
/// @returns the register data as a `f16`.
/// @note, must only be called if `IsF16()` is true
f16 AsF16() const { return std::get<f16>(data_); }
/// @returns the register data as an `i32`.
/// @note, must only be called if `IsI32()` is true
i32 AsI32() const { return std::get<i32>(data_); }
/// @returns the register data as a `u32`.
/// @note, must only be called if `IsU32()` is true
u32 AsU32() const { return std::get<u32>(data_); }
/// @returns the register data as an `Id`.
/// @note, must only be called if `IsTemp()` is true
Id AsId() const { return std::get<Id>(data_); }
/// @returns the register data as a `VarData` structure.
/// @note, must only be called if `IsVar()` is true
VarData AsVarData() const { return std::get<VarData>(data_); }
/// @returns the register data as a `bool`.
/// @note, must only be called if `IsBool()` is true
bool AsBool() const { return std::get<bool>(data_); }
/// @returns the string representation of the register
std::string AsString() const;
private:
/// The type of the register
enum class Kind {
/// A temporary allocated register
kTemp,
/// A f32 register
kF32,
/// A f16 register
kF16,
/// An i32 register
kI32,
/// A u32 register
kU32,
/// A variable register
kVar,
/// A boolean register
kBool,
};
/// The type of data stored in this register
Kind kind_;
/// The data stored in the register
std::variant<Id, f32, f16, u32, i32, VarData, bool> data_;
};
} // namespace tint::ir
#endif // SRC_TINT_IR_REGISTER_H_

136
src/tint/ir/register_test.cc Normal file
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@ -0,0 +1,136 @@
// Copyright 2022 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/tint/ir/test_helper.h"
#include "src/tint/ir/register.h"
namespace tint::ir {
namespace {
using namespace tint::number_suffixes; // NOLINT
using IR_RegisterTest = TestHelper;
TEST_F(IR_RegisterTest, f32) {
Register r(1.2_f);
EXPECT_EQ(1.2_f, r.AsF32());
EXPECT_EQ("1.200000", r.AsString());
EXPECT_TRUE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
TEST_F(IR_RegisterTest, f16) {
Register r(1.1_h);
EXPECT_EQ(1.1_h, r.AsF16());
EXPECT_EQ("1.099609", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_TRUE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
TEST_F(IR_RegisterTest, i32) {
Register r(1_i);
EXPECT_EQ(1_i, r.AsI32());
EXPECT_EQ("1", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_TRUE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
TEST_F(IR_RegisterTest, u32) {
Register r(2_u);
EXPECT_EQ(2_u, r.AsU32());
EXPECT_EQ("2", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_TRUE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
TEST_F(IR_RegisterTest, id) {
Register r(Register::Id(4));
EXPECT_EQ(4u, r.AsId());
EXPECT_EQ("%4", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_TRUE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
TEST_F(IR_RegisterTest, bool) {
Register r(false);
EXPECT_FALSE(r.AsBool());
EXPECT_EQ("false", r.AsString());
r = Register(true);
EXPECT_TRUE(r.AsBool());
EXPECT_EQ("true", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_FALSE(r.IsVar());
EXPECT_TRUE(r.IsBool());
}
TEST_F(IR_RegisterTest, var) {
Symbol s;
Register r(s, 2);
EXPECT_EQ(2u, r.AsVarData().id);
EXPECT_EQ(s, r.AsVarData().sym);
EXPECT_EQ("%v2", r.AsString());
r = Register(s, 4);
EXPECT_EQ(4u, r.AsVarData().id);
EXPECT_EQ(s, r.AsVarData().sym);
EXPECT_EQ("%v4", r.AsString());
EXPECT_FALSE(r.IsF32());
EXPECT_FALSE(r.IsF16());
EXPECT_FALSE(r.IsI32());
EXPECT_FALSE(r.IsU32());
EXPECT_FALSE(r.IsTemp());
EXPECT_TRUE(r.IsVar());
EXPECT_FALSE(r.IsBool());
}
} // namespace
} // namespace tint::ir