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// 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/ast/case_selector.h"
#include "src/tint/ast/int_literal_expression.h"
#include "src/tint/constant/scalar.h"
namespace tint::ir {
namespace {
using namespace tint::number_suffixes; // NOLINT
using IR_BuilderImplTest = TestHelper;
TEST_F(IR_BuilderImplTest, Func) {
// func -> start -> end
Func("f", utils::Empty, ty.void_(), utils::Empty);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
ASSERT_EQ(0u, m.entry_points.Length());
ASSERT_EQ(1u, m.functions.Length());
auto* f = m.functions[0];
EXPECT_NE(f->start_target, nullptr);
EXPECT_NE(f->end_target, nullptr);
EXPECT_EQ(1u, f->start_target->inbound_branches.Length());
EXPECT_EQ(1u, f->end_target->inbound_branches.Length());
EXPECT_EQ(f->start_target->branch_target, f->end_target);
}
TEST_F(IR_BuilderImplTest, EntryPoint) {
Func("f", utils::Empty, ty.void_(), utils::Empty,
utils::Vector{Stage(ast::PipelineStage::kFragment)});
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
ASSERT_EQ(1u, m.entry_points.Length());
EXPECT_EQ(m.functions[0], m.entry_points[0]);
}
TEST_F(IR_BuilderImplTest, IfStatement) {
// func -> start -> if -> true block
// -> false block
//
// [true block] -> if merge
// [false block] -> if merge
// [if merge] -> func end
//
auto* ast_if = If(true, Block(), Else(Block()));
WrapInFunction(ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
EXPECT_TRUE(ir_if->Is<ir::If>());
auto* flow = ir_if->As<ir::If>();
ASSERT_NE(flow->true_target, nullptr);
ASSERT_NE(flow->false_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->false_target->inbound_branches.Length());
EXPECT_EQ(2u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->true_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->false_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
// Check condition
ASSERT_TRUE(flow->condition->Is<Constant>());
auto* instr = flow->condition->As<Constant>()->value;
ASSERT_TRUE(instr->Is<constant::Scalar<bool>>());
EXPECT_TRUE(instr->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, IfStatement_TrueReturns) {
// func -> start -> if -> true block
// -> false block
//
// [true block] -> func end
// [false block] -> if merge
// [if merge] -> func end
//
auto* ast_if = If(true, Block(Return()));
WrapInFunction(ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
EXPECT_TRUE(ir_if->Is<ir::If>());
auto* flow = ir_if->As<ir::If>();
ASSERT_NE(flow->true_target, nullptr);
ASSERT_NE(flow->false_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(2u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->true_target->branch_target, func->end_target);
EXPECT_EQ(flow->false_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, IfStatement_FalseReturns) {
// func -> start -> if -> true block
// -> false block
//
// [true block] -> if merge
// [false block] -> func end
// [if merge] -> func end
//
auto* ast_if = If(true, Block(), Else(Block(Return())));
WrapInFunction(ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
EXPECT_TRUE(ir_if->Is<ir::If>());
auto* flow = ir_if->As<ir::If>();
ASSERT_NE(flow->true_target, nullptr);
ASSERT_NE(flow->false_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(2u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->true_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->false_target->branch_target, func->end_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, IfStatement_BothReturn) {
// func -> start -> if -> true block
// -> false block
//
// [true block] -> func end
// [false block] -> func end
// [if merge] -> nullptr
//
auto* ast_if = If(true, Block(Return()), Else(Block(Return())));
WrapInFunction(ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
EXPECT_TRUE(ir_if->Is<ir::If>());
auto* flow = ir_if->As<ir::If>();
ASSERT_NE(flow->true_target, nullptr);
ASSERT_NE(flow->false_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->false_target->inbound_branches.Length());
EXPECT_EQ(0u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(2u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->true_target->branch_target, func->end_target);
EXPECT_EQ(flow->false_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, IfStatement_JumpChainToMerge) {
// if (true) {
// loop {
// break;
// }
// }
//
// func -> start -> if true
// -> if false
//
// [if true] -> loop
// [if false] -> if merge
// [if merge] -> func end
// [loop] -> loop start
// [loop start] -> loop merge
// [loop continuing] -> loop start
// [loop merge] -> if merge
//
auto* ast_loop = Loop(Block(Break()));
auto* ast_if = If(true, Block(ast_loop));
WrapInFunction(ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
EXPECT_TRUE(ir_if->Is<ir::If>());
auto* if_flow = ir_if->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(func->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, loop_flow);
EXPECT_EQ(loop_flow->start_target->branch_target, loop_flow->merge_target);
EXPECT_EQ(loop_flow->merge_target->branch_target, if_flow->merge_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, loop_flow->start_target);
EXPECT_EQ(if_flow->false_target->branch_target, if_flow->merge_target);
EXPECT_EQ(if_flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Loop_WithBreak) {
// func -> start -> loop -> loop start -> loop merge -> func end
//
// [continuing] -> loop start
//
auto* ast_loop = Loop(Block(Break()));
WrapInFunction(ast_loop);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* flow = ir_loop->As<ir::Loop>();
ASSERT_NE(flow->start_target, nullptr);
ASSERT_NE(flow->continuing_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(2u, flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->continuing_target->branch_target, flow->start_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Loop_WithContinue) {
// func -> start -> loop -> loop start -> if -> true block
// -> false block
//
// [if true] -> loop merge
// [if false] -> if merge
// [if merge] -> loop continuing
// [loop continuing] -> loop start
// [loop merge] -> func end
//
auto* ast_if = If(true, Block(Break()));
auto* ast_loop = Loop(Block(ast_if, Continue()));
WrapInFunction(ast_loop);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
ASSERT_TRUE(ir_if->Is<ir::If>());
auto* if_flow = ir_if->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, loop_flow);
EXPECT_EQ(loop_flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, loop_flow->merge_target);
EXPECT_EQ(if_flow->false_target->branch_target, if_flow->merge_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, loop_flow->start_target);
EXPECT_EQ(loop_flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Loop_WithContinuing_BreakIf) {
// func -> start -> loop -> loop start -> continuing
//
// [loop continuing] -> if -> true branch
// -> false branch
// [if true] -> loop merge
// [if false] -> if merge
// [if merge] -> loop start
// [loop merge] -> func end
//
auto* ast_break_if = BreakIf(true);
auto* ast_loop = Loop(Block(), Block(ast_break_if));
WrapInFunction(ast_loop);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
auto* ir_break_if = FlowNodeForAstNode(ast_break_if);
ASSERT_NE(ir_break_if, nullptr);
ASSERT_TRUE(ir_break_if->Is<ir::If>());
auto* break_if_flow = ir_break_if->As<ir::If>();
ASSERT_NE(break_if_flow->true_target, nullptr);
ASSERT_NE(break_if_flow->false_target, nullptr);
ASSERT_NE(break_if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, break_if_flow->inbound_branches.Length());
EXPECT_EQ(1u, break_if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, break_if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, break_if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, loop_flow);
EXPECT_EQ(loop_flow->start_target->branch_target, loop_flow->continuing_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, break_if_flow);
EXPECT_EQ(break_if_flow->true_target->branch_target, loop_flow->merge_target);
EXPECT_EQ(break_if_flow->false_target->branch_target, break_if_flow->merge_target);
EXPECT_EQ(break_if_flow->merge_target->branch_target, loop_flow->start_target);
EXPECT_EQ(loop_flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Loop_WithReturn) {
// func -> start -> loop -> loop start -> if -> true block
// -> false block
//
// [if true] -> func end
// [if false] -> if merge
// [if merge] -> loop continuing
// [loop continuing] -> loop start
// [loop merge] -> nullptr
//
auto* ast_if = If(true, Block(Return()));
auto* ast_loop = Loop(Block(ast_if, Continue()));
WrapInFunction(ast_loop);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
ASSERT_TRUE(ir_if->Is<ir::If>());
auto* if_flow = ir_if->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(loop_flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, func->end_target);
EXPECT_EQ(if_flow->false_target->branch_target, if_flow->merge_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, loop_flow->start_target);
EXPECT_EQ(func->start_target->branch_target, ir_loop);
EXPECT_EQ(loop_flow->merge_target->branch_target, nullptr);
// Check condition
ASSERT_TRUE(if_flow->condition->Is<Constant>());
auto* instr = if_flow->condition->As<Constant>()->value;
ASSERT_TRUE(instr->Is<constant::Scalar<bool>>());
EXPECT_TRUE(instr->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, Loop_WithOnlyReturn) {
// {
// loop {
// return;
// continue;
// }
// if true { return; }
// }
//
// func -> start -> loop -> loop start -> return -> func end
//
// [loop continuing] -> loop start
// [loop merge] -> nullptr
//
// Note, the continue; is here is a dead call, so we won't emit a branch to the continuing block
// so the inbound_branches will be zero for continuing.
//
// The `if` after the `loop` is also eliminated as there is no control-flow path reaching the
// block.
auto* ast_loop = Loop(Block(Return(), Continue()));
WrapInFunction(ast_loop, If(true, Block(Return())));
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(loop_flow->start_target->branch_target, func->end_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, loop_flow->start_target);
EXPECT_EQ(func->start_target->branch_target, ir_loop);
}
TEST_F(IR_BuilderImplTest, Loop_WithOnlyReturn_ContinuingBreakIf) {
// {
// loop {
// return;
// continuing {
// break if true;
// }
// }
// if (true) { return; }
// }
//
// func -> start -> loop -> loop start -> return -> func end
//
// [loop continuing] -> break if true
// -> break if false
// [break if true] -> loop merge
// [break if false] -> if merge
// [break if merge] -> loop start
// [loop merge] -> nullptr
//
// In this case, the continuing block is dead code, but we don't really know that when parsing
// so we end up with a branch into the loop merge target. The loop merge can tell it's dead code
// so we can drop the if ater the loop.
auto* ast_break_if = BreakIf(true);
auto* ast_loop = Loop(Block(Return()), Block(ast_break_if));
auto* ast_if = If(true, Block(Return()));
WrapInFunction(Block(ast_loop, ast_if));
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
auto* ir_if = FlowNodeForAstNode(ast_if);
EXPECT_EQ(ir_if, nullptr);
auto* ir_break_if = FlowNodeForAstNode(ast_break_if);
ASSERT_NE(ir_break_if, nullptr);
EXPECT_TRUE(ir_break_if->Is<ir::If>());
auto* break_if_flow = ir_break_if->As<ir::If>();
ASSERT_NE(break_if_flow->true_target, nullptr);
ASSERT_NE(break_if_flow->false_target, nullptr);
ASSERT_NE(break_if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
// This is 1 because only the loop branch happens. The subsequent if return is dead code.
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(loop_flow->start_target->branch_target, func->end_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, break_if_flow);
EXPECT_EQ(func->start_target->branch_target, ir_loop);
}
TEST_F(IR_BuilderImplTest, Loop_WithIf_BothBranchesBreak) {
// func -> start -> loop -> loop start -> if -> true branch
// -> false branch
//
// [if true] -> loop merge
// [if false] -> loop merge
// [if merge] -> nullptr
// [loop continuing] -> loop start
// [loop merge] -> func end
//
auto* ast_if = If(true, Block(Break()), Else(Block(Break())));
auto* ast_loop = Loop(Block(ast_if, Continue()));
WrapInFunction(ast_loop);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop = FlowNodeForAstNode(ast_loop);
ASSERT_NE(ir_loop, nullptr);
EXPECT_TRUE(ir_loop->Is<ir::Loop>());
auto* loop_flow = ir_loop->As<ir::Loop>();
ASSERT_NE(loop_flow->start_target, nullptr);
ASSERT_NE(loop_flow->continuing_target, nullptr);
ASSERT_NE(loop_flow->merge_target, nullptr);
auto* ir_if = FlowNodeForAstNode(ast_if);
ASSERT_NE(ir_if, nullptr);
ASSERT_TRUE(ir_if->Is<ir::If>());
auto* if_flow = ir_if->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(0u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
// Note, the `continue` is dead code because both if branches go out of loop, so it just gets
// dropped.
EXPECT_EQ(func->start_target->branch_target, loop_flow);
EXPECT_EQ(loop_flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, loop_flow->merge_target);
EXPECT_EQ(if_flow->false_target->branch_target, loop_flow->merge_target);
EXPECT_EQ(loop_flow->continuing_target->branch_target, loop_flow->start_target);
EXPECT_EQ(loop_flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Loop_Nested) {
// loop { // loop_a
// loop { // loop_b
// if (true) { break; } // if_a
// if (true) { continue; } // if_b
// continuing {
// loop { // loop_c
// break;
// }
//
// loop { // loop_d
// continuing {
// break if (true); // if_c
// }
// }
// }
// }
// if (true) { break; } // if_d
// }
//
// func -> start -> loop_a -> loop_a start
//
// [loop_a start] -> loop_b
// [loop_b start] -> if_a
// [if_a true] -> loop_b merge
// [if_a false] -> if_a merge
// [if_a merge] -> if_b
// [if_b true] -> loop_b continuing
// [if_b false] -> if_b merge
// [if_b merge] -> loop_b continug
// [loop_b continuing] -> loop_c
// [loop_c start] -> loop_c merge
// [loop_c continuing] -> loop_c start
// [loop_c merge] -> loop_d
// [loop_d start] -> loop_d continuing
// [loop_d continuing] -> if_c
// [if_c true] -> loop_d merge
// [if_c false] -> if_c merge
// [if c merge] -> loop_d start
// [loop_d merge] -> loop_b start
// [loop_b merge] -> if_d
// [if_d true] -> loop_a merge
// [if_d false] -> if_d merge
// [if_d merge] -> loop_a continuing
// [loop_a continuing] -> loop_a start
// [loop_a merge] -> func end
//
auto* ast_if_a = If(true, Block(Break()));
auto* ast_if_b = If(true, Block(Continue()));
auto* ast_if_c = BreakIf(true);
auto* ast_if_d = If(true, Block(Break()));
auto* ast_loop_d = Loop(Block(), Block(ast_if_c));
auto* ast_loop_c = Loop(Block(Break()));
auto* ast_loop_b = Loop(Block(ast_if_a, ast_if_b), Block(ast_loop_c, ast_loop_d));
auto* ast_loop_a = Loop(Block(ast_loop_b, ast_if_d));
WrapInFunction(ast_loop_a);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_loop_a = FlowNodeForAstNode(ast_loop_a);
ASSERT_NE(ir_loop_a, nullptr);
EXPECT_TRUE(ir_loop_a->Is<ir::Loop>());
auto* loop_flow_a = ir_loop_a->As<ir::Loop>();
ASSERT_NE(loop_flow_a->start_target, nullptr);
ASSERT_NE(loop_flow_a->continuing_target, nullptr);
ASSERT_NE(loop_flow_a->merge_target, nullptr);
auto* ir_loop_b = FlowNodeForAstNode(ast_loop_b);
ASSERT_NE(ir_loop_b, nullptr);
EXPECT_TRUE(ir_loop_b->Is<ir::Loop>());
auto* loop_flow_b = ir_loop_b->As<ir::Loop>();
ASSERT_NE(loop_flow_b->start_target, nullptr);
ASSERT_NE(loop_flow_b->continuing_target, nullptr);
ASSERT_NE(loop_flow_b->merge_target, nullptr);
auto* ir_loop_c = FlowNodeForAstNode(ast_loop_c);
ASSERT_NE(ir_loop_c, nullptr);
EXPECT_TRUE(ir_loop_c->Is<ir::Loop>());
auto* loop_flow_c = ir_loop_c->As<ir::Loop>();
ASSERT_NE(loop_flow_c->start_target, nullptr);
ASSERT_NE(loop_flow_c->continuing_target, nullptr);
ASSERT_NE(loop_flow_c->merge_target, nullptr);
auto* ir_loop_d = FlowNodeForAstNode(ast_loop_d);
ASSERT_NE(ir_loop_d, nullptr);
EXPECT_TRUE(ir_loop_d->Is<ir::Loop>());
auto* loop_flow_d = ir_loop_d->As<ir::Loop>();
ASSERT_NE(loop_flow_d->start_target, nullptr);
ASSERT_NE(loop_flow_d->continuing_target, nullptr);
ASSERT_NE(loop_flow_d->merge_target, nullptr);
auto* ir_if_a = FlowNodeForAstNode(ast_if_a);
ASSERT_NE(ir_if_a, nullptr);
EXPECT_TRUE(ir_if_a->Is<ir::If>());
auto* if_flow_a = ir_if_a->As<ir::If>();
ASSERT_NE(if_flow_a->true_target, nullptr);
ASSERT_NE(if_flow_a->false_target, nullptr);
ASSERT_NE(if_flow_a->merge_target, nullptr);
auto* ir_if_b = FlowNodeForAstNode(ast_if_b);
ASSERT_NE(ir_if_b, nullptr);
EXPECT_TRUE(ir_if_b->Is<ir::If>());
auto* if_flow_b = ir_if_b->As<ir::If>();
ASSERT_NE(if_flow_b->true_target, nullptr);
ASSERT_NE(if_flow_b->false_target, nullptr);
ASSERT_NE(if_flow_b->merge_target, nullptr);
auto* ir_if_c = FlowNodeForAstNode(ast_if_c);
ASSERT_NE(ir_if_c, nullptr);
EXPECT_TRUE(ir_if_c->Is<ir::If>());
auto* if_flow_c = ir_if_c->As<ir::If>();
ASSERT_NE(if_flow_c->true_target, nullptr);
ASSERT_NE(if_flow_c->false_target, nullptr);
ASSERT_NE(if_flow_c->merge_target, nullptr);
auto* ir_if_d = FlowNodeForAstNode(ast_if_d);
ASSERT_NE(ir_if_d, nullptr);
EXPECT_TRUE(ir_if_d->Is<ir::If>());
auto* if_flow_d = ir_if_d->As<ir::If>();
ASSERT_NE(if_flow_d->true_target, nullptr);
ASSERT_NE(if_flow_d->false_target, nullptr);
ASSERT_NE(if_flow_d->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, loop_flow_a->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow_a->start_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_a->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_a->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_b->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow_b->start_target->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow_b->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_b->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_c->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow_c->start_target->inbound_branches.Length());
EXPECT_EQ(0u, loop_flow_c->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_c->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_d->inbound_branches.Length());
EXPECT_EQ(2u, loop_flow_d->start_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_d->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, loop_flow_d->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_a->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_a->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_a->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_a->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_b->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_b->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_b->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_b->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_c->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_c->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_c->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_c->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_d->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_d->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_d->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow_d->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->start_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, loop_flow_a);
EXPECT_EQ(loop_flow_a->start_target->branch_target, loop_flow_b);
EXPECT_EQ(loop_flow_b->start_target->branch_target, if_flow_a);
EXPECT_EQ(if_flow_a->true_target->branch_target, loop_flow_b->merge_target);
EXPECT_EQ(if_flow_a->false_target->branch_target, if_flow_a->merge_target);
EXPECT_EQ(if_flow_a->merge_target->branch_target, if_flow_b);
EXPECT_EQ(if_flow_b->true_target->branch_target, loop_flow_b->continuing_target);
EXPECT_EQ(if_flow_b->false_target->branch_target, if_flow_b->merge_target);
EXPECT_EQ(if_flow_b->merge_target->branch_target, loop_flow_b->continuing_target);
EXPECT_EQ(loop_flow_b->continuing_target->branch_target, loop_flow_c);
EXPECT_EQ(loop_flow_c->start_target->branch_target, loop_flow_c->merge_target);
EXPECT_EQ(loop_flow_c->continuing_target->branch_target, loop_flow_c->start_target);
EXPECT_EQ(loop_flow_c->merge_target->branch_target, loop_flow_d);
EXPECT_EQ(loop_flow_d->start_target->branch_target, loop_flow_d->continuing_target);
EXPECT_EQ(loop_flow_d->continuing_target->branch_target, if_flow_c);
EXPECT_EQ(if_flow_c->true_target->branch_target, loop_flow_d->merge_target);
EXPECT_EQ(if_flow_c->false_target->branch_target, if_flow_c->merge_target);
EXPECT_EQ(if_flow_c->merge_target->branch_target, loop_flow_d->start_target);
EXPECT_EQ(loop_flow_d->merge_target->branch_target, loop_flow_b->start_target);
EXPECT_EQ(loop_flow_b->merge_target->branch_target, if_flow_d);
EXPECT_EQ(if_flow_d->true_target->branch_target, loop_flow_a->merge_target);
EXPECT_EQ(if_flow_d->false_target->branch_target, if_flow_d->merge_target);
EXPECT_EQ(if_flow_d->merge_target->branch_target, loop_flow_a->continuing_target);
EXPECT_EQ(loop_flow_a->continuing_target->branch_target, loop_flow_a->start_target);
EXPECT_EQ(loop_flow_a->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, While) {
// {
// while false {
// }
// }
//
// func -> while -> loop_start -> if true
// -> if false
//
// [if true] -> if merge
// [if false] -> while merge
// [if merge] -> loop continuing
// [loop continuing] -> loop start
// [while merge] -> func end
//
auto* ast_while = While(false, Block());
WrapInFunction(ast_while);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_while = FlowNodeForAstNode(ast_while);
ASSERT_NE(ir_while, nullptr);
ASSERT_TRUE(ir_while->Is<ir::Loop>());
auto* flow = ir_while->As<ir::Loop>();
ASSERT_NE(flow->start_target, nullptr);
ASSERT_NE(flow->continuing_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_NE(flow->start_target->branch_target, nullptr);
ASSERT_TRUE(flow->start_target->branch_target->Is<ir::If>());
auto* if_flow = flow->start_target->branch_target->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(2u, flow->start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, if_flow->merge_target);
EXPECT_EQ(if_flow->false_target->branch_target, flow->merge_target);
EXPECT_EQ(if_flow->merge_target->branch_target, flow->continuing_target);
EXPECT_EQ(flow->continuing_target->branch_target, flow->start_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
// Check condition
ASSERT_TRUE(if_flow->condition->Is<Constant>());
auto* instr = if_flow->condition->As<Constant>()->value;
ASSERT_TRUE(instr->Is<constant::Scalar<bool>>());
EXPECT_FALSE(instr->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, While_Return) {
// {
// while true {
// return;
// }
// }
//
// func -> while -> if true
// if false
//
// [if true] -> if merge
// [if false] -> while merge
// [if merge] -> func end
// [while merge] -> func end
//
auto* ast_while = While(true, Block(Return()));
WrapInFunction(ast_while);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_while = FlowNodeForAstNode(ast_while);
ASSERT_NE(ir_while, nullptr);
ASSERT_TRUE(ir_while->Is<ir::Loop>());
auto* flow = ir_while->As<ir::Loop>();
ASSERT_NE(flow->start_target, nullptr);
ASSERT_NE(flow->continuing_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_NE(flow->start_target->branch_target, nullptr);
ASSERT_TRUE(flow->start_target->branch_target->Is<ir::If>());
auto* if_flow = flow->start_target->branch_target->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(2u, func->end_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(2u, flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, if_flow->merge_target);
EXPECT_EQ(if_flow->false_target->branch_target, flow->merge_target);
EXPECT_EQ(if_flow->merge_target->branch_target, func->end_target);
EXPECT_EQ(flow->continuing_target->branch_target, flow->start_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
// TODO(dsinclair): Enable when variable declarations and increment are supported
TEST_F(IR_BuilderImplTest, DISABLED_For) {
// for(var i: 0; i < 10; i++) {
// }
//
// func -> loop -> loop start -> if true
// -> if false
//
// [if true] -> if merge
// [if false] -> loop merge
// [if merge] -> loop continuing
// [loop continuing] -> loop start
// [loop merge] -> func end
//
auto* ast_for = For(Decl(Var("i", ty.i32())), LessThan("i", 10_a), Increment("i"), Block());
WrapInFunction(ast_for);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_for = FlowNodeForAstNode(ast_for);
ASSERT_NE(ir_for, nullptr);
ASSERT_TRUE(ir_for->Is<ir::Loop>());
auto* flow = ir_for->As<ir::Loop>();
ASSERT_NE(flow->start_target, nullptr);
ASSERT_NE(flow->continuing_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_NE(flow->start_target->branch_target, nullptr);
ASSERT_TRUE(flow->start_target->branch_target->Is<ir::If>());
auto* if_flow = flow->start_target->branch_target->As<ir::If>();
ASSERT_NE(if_flow->true_target, nullptr);
ASSERT_NE(if_flow->false_target, nullptr);
ASSERT_NE(if_flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(2u, flow->start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->true_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->false_target->inbound_branches.Length());
EXPECT_EQ(1u, if_flow->merge_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, flow);
EXPECT_EQ(flow->start_target->branch_target, if_flow);
EXPECT_EQ(if_flow->true_target->branch_target, if_flow->merge_target);
EXPECT_EQ(if_flow->false_target->branch_target, flow->merge_target);
EXPECT_EQ(if_flow->merge_target->branch_target, flow->continuing_target);
EXPECT_EQ(flow->continuing_target->branch_target, flow->start_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
// Check condition
ASSERT_TRUE(if_flow->condition->Is<Constant>());
auto* instr = if_flow->condition->As<Constant>()->value;
ASSERT_TRUE(instr->Is<constant::Scalar<bool>>());
EXPECT_FALSE(instr->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, For_NoInitCondOrContinuing) {
// for (;;) {
// break;
// }
//
// func -> loop -> loop start -> loop merge -> func end
//
auto* ast_for = For(nullptr, nullptr, nullptr, Block(Break()));
WrapInFunction(ast_for);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_for = FlowNodeForAstNode(ast_for);
ASSERT_NE(ir_for, nullptr);
ASSERT_TRUE(ir_for->Is<ir::Loop>());
auto* flow = ir_for->As<ir::Loop>();
ASSERT_NE(flow->start_target, nullptr);
ASSERT_NE(flow->continuing_target, nullptr);
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(2u, flow->start_target->inbound_branches.Length());
EXPECT_EQ(0u, flow->continuing_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(flow->start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->continuing_target->branch_target, flow->start_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Switch) {
// func -> switch -> case 1
// -> case 2
// -> default
//
// [case 1] -> switch merge
// [case 2] -> switch merge
// [default] -> switch merge
// [switch merge] -> func end
//
auto* ast_switch = Switch(
1_i, utils::Vector{Case(utils::Vector{CaseSelector(0_i)}, Block()),
Case(utils::Vector{CaseSelector(1_i)}, Block()), DefaultCase(Block())});
WrapInFunction(ast_switch);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_switch = FlowNodeForAstNode(ast_switch);
ASSERT_NE(ir_switch, nullptr);
ASSERT_TRUE(ir_switch->Is<ir::Switch>());
auto* flow = ir_switch->As<ir::Switch>();
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(3u, flow->cases.Length());
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
ASSERT_TRUE(flow->cases[1].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(1_i, flow->cases[1].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[2].selectors.Length());
EXPECT_TRUE(flow->cases[2].selectors[0].IsDefault());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[0].start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[1].start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[2].start_target->inbound_branches.Length());
EXPECT_EQ(3u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, ir_switch);
EXPECT_EQ(flow->cases[0].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->cases[1].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->cases[2].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
// Check condition
ASSERT_TRUE(flow->condition->Is<Constant>());
auto* instr = flow->condition->As<Constant>()->value;
ASSERT_TRUE(instr->Is<constant::Scalar<i32>>());
EXPECT_EQ(1_i, instr->As<constant::Scalar<i32>>()->ValueAs<i32>());
}
TEST_F(IR_BuilderImplTest, Switch_OnlyDefault) {
// func -> switch -> default -> switch merge -> func end
//
auto* ast_switch = Switch(1_i, utils::Vector{DefaultCase(Block())});
WrapInFunction(ast_switch);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_switch = FlowNodeForAstNode(ast_switch);
ASSERT_NE(ir_switch, nullptr);
ASSERT_TRUE(ir_switch->Is<ir::Switch>());
auto* flow = ir_switch->As<ir::Switch>();
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(1u, flow->cases.Length());
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
EXPECT_TRUE(flow->cases[0].selectors[0].IsDefault());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[0].start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, ir_switch);
EXPECT_EQ(flow->cases[0].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Switch_WithBreak) {
// {
// switch(1) {
// case 0: {
// break;
// if true { return;} // Dead code
// }
// default: {}
// }
// }
//
// func -> switch -> case 1
// -> default
//
// [case 1] -> switch merge
// [default] -> switch merge
// [switch merge] -> func end
auto* ast_switch = Switch(1_i, utils::Vector{Case(utils::Vector{CaseSelector(0_i)},
Block(Break(), If(true, Block(Return())))),
DefaultCase(Block())});
WrapInFunction(ast_switch);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
auto* ir_switch = FlowNodeForAstNode(ast_switch);
ASSERT_NE(ir_switch, nullptr);
ASSERT_TRUE(ir_switch->Is<ir::Switch>());
auto* flow = ir_switch->As<ir::Switch>();
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(2u, flow->cases.Length());
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
EXPECT_TRUE(flow->cases[1].selectors[0].IsDefault());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[0].start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[1].start_target->inbound_branches.Length());
EXPECT_EQ(2u, flow->merge_target->inbound_branches.Length());
// This is 1 because the if is dead-code eliminated and the return doesn't happen.
EXPECT_EQ(1u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, ir_switch);
EXPECT_EQ(flow->cases[0].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->cases[1].start_target->branch_target, flow->merge_target);
EXPECT_EQ(flow->merge_target->branch_target, func->end_target);
}
TEST_F(IR_BuilderImplTest, Switch_AllReturn) {
// {
// switch(1) {
// case 0: {
// return;
// }
// default: {
// return;
// }
// }
// if true { return; } // Dead code
// }
//
// func -> switch -> case 1
// -> default
//
// [case 1] -> func end
// [default] -> func end
// [switch merge] -> nullptr
//
auto* ast_switch =
Switch(1_i, utils::Vector{Case(utils::Vector{CaseSelector(0_i)}, Block(Return())),
DefaultCase(Block(Return()))});
auto* ast_if = If(true, Block(Return()));
WrapInFunction(ast_switch, ast_if);
auto r = Build();
ASSERT_TRUE(r) << Error();
auto m = r.Move();
ASSERT_EQ(FlowNodeForAstNode(ast_if), nullptr);
auto* ir_switch = FlowNodeForAstNode(ast_switch);
ASSERT_NE(ir_switch, nullptr);
ASSERT_TRUE(ir_switch->Is<ir::Switch>());
auto* flow = ir_switch->As<ir::Switch>();
ASSERT_NE(flow->merge_target, nullptr);
ASSERT_EQ(2u, flow->cases.Length());
ASSERT_EQ(1u, m.functions.Length());
auto* func = m.functions[0];
ASSERT_EQ(1u, flow->cases[0].selectors.Length());
ASSERT_TRUE(flow->cases[0].selectors[0].val->Is<constant::Scalar<tint::i32>>());
EXPECT_EQ(0_i, flow->cases[0].selectors[0].val->As<constant::Scalar<tint::i32>>()->ValueOf());
ASSERT_EQ(1u, flow->cases[1].selectors.Length());
EXPECT_TRUE(flow->cases[1].selectors[0].IsDefault());
EXPECT_EQ(1u, flow->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[0].start_target->inbound_branches.Length());
EXPECT_EQ(1u, flow->cases[1].start_target->inbound_branches.Length());
EXPECT_EQ(0u, flow->merge_target->inbound_branches.Length());
EXPECT_EQ(2u, func->end_target->inbound_branches.Length());
EXPECT_EQ(func->start_target->branch_target, ir_switch);
EXPECT_EQ(flow->cases[0].start_target->branch_target, func->end_target);
EXPECT_EQ(flow->cases[1].start_target->branch_target, func->end_target);
EXPECT_EQ(flow->merge_target->branch_target, nullptr);
}
TEST_F(IR_BuilderImplTest, EmitLiteral_Bool_True) {
auto* expr = Expr(true);
GlobalVar("a", ty.bool_(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<bool>>());
EXPECT_TRUE(val->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, EmitLiteral_Bool_False) {
auto* expr = Expr(false);
GlobalVar("a", ty.bool_(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<bool>>());
EXPECT_FALSE(val->As<constant::Scalar<bool>>()->ValueAs<bool>());
}
TEST_F(IR_BuilderImplTest, EmitLiteral_F32) {
auto* expr = Expr(1.2_f);
GlobalVar("a", ty.f32(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<f32>>());
EXPECT_EQ(1.2_f, val->As<constant::Scalar<f32>>()->ValueAs<f32>());
}
TEST_F(IR_BuilderImplTest, EmitLiteral_F16) {
Enable(ast::Extension::kF16);
auto* expr = Expr(1.2_h);
GlobalVar("a", ty.f16(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<f16>>());
EXPECT_EQ(1.2_h, val->As<constant::Scalar<f16>>()->ValueAs<f32>());
}
TEST_F(IR_BuilderImplTest, EmitLiteral_I32) {
auto* expr = Expr(-2_i);
GlobalVar("a", ty.i32(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<i32>>());
EXPECT_EQ(-2_i, val->As<constant::Scalar<i32>>()->ValueAs<f32>());
}
TEST_F(IR_BuilderImplTest, EmitLiteral_U32) {
auto* expr = Expr(2_u);
GlobalVar("a", ty.u32(), ast::AddressSpace::kPrivate, expr);
auto& b = CreateBuilder();
auto r = b.EmitLiteral(expr);
ASSERT_TRUE(r) << b.error();
ASSERT_TRUE(r.Get()->Is<Constant>());
auto* val = r.Get()->As<Constant>()->value;
EXPECT_TRUE(val->Is<constant::Scalar<u32>>());
EXPECT_EQ(2_u, val->As<constant::Scalar<u32>>()->ValueAs<f32>());
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Add) {
auto* expr = Add(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 + 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Subtract) {
auto* expr = Sub(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 - 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Multiply) {
auto* expr = Mul(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 * 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Div) {
auto* expr = Div(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 / 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Modulo) {
auto* expr = Mod(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 % 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_And) {
auto* expr = And(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 & 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Or) {
auto* expr = Or(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 | 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Xor) {
auto* expr = Xor(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 ^ 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_LogicalAnd) {
auto* expr = LogicalAnd(true, false);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = true && false
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_LogicalOr) {
auto* expr = LogicalOr(false, true);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = false || true
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Equal) {
auto* expr = Equal(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 == 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_NotEqual) {
auto* expr = NotEqual(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 != 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_LessThan) {
auto* expr = LessThan(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 < 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_GreaterThan) {
auto* expr = GreaterThan(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 > 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_LessThanEqual) {
auto* expr = LessThanEqual(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 <= 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_GreaterThanEqual) {
auto* expr = GreaterThanEqual(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (bool) = 3 >= 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_ShiftLeft) {
auto* expr = Shl(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 << 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_ShiftRight) {
auto* expr = Shr(3_u, 4_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 >> 4
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Binary_Compound) {
auto* expr = LogicalAnd(LessThan(1_u, Add(Shr(3_u, 4_u), 9_u)),
GreaterThan(2.5_f, Div(6.7_f, Mul(2.3_f, 5.5_f))));
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (u32) = 3 >> 4
%2 (u32) = %1 (u32) + 9
%3 (bool) = 1 < %2 (u32)
%4 (f32) = 2.3 * 5.5
%5 (f32) = 6.7 / %4 (f32)
%6 (bool) = 2.5 > %5 (f32)
%7 (bool) = %3 (bool) && %6 (bool)
)");
}
TEST_F(IR_BuilderImplTest, EmitExpression_Bitcast) {
auto* expr = Bitcast(ty.f32(), 3_u);
WrapInFunction(expr);
auto& b = CreateBuilder();
InjectFlowBlock();
auto r = b.EmitExpression(expr);
ASSERT_TRUE(r) << b.error();
Disassembler d(b.builder.ir);
d.EmitBlockInstructions(b.current_flow_block);
EXPECT_EQ(d.AsString(), R"(%1 (f32) = bitcast(3)
)");
}
} // namespace
} // namespace tint::ir