156f187c53
This is a reland of 8ff8ddbaf5
Original change's description:
> [turbofan] Further brokerize BytecodeGraphBuilder
>
> Replace all usages of VectorSlotPair with FeedbackSource.
>
> Bug: v8:7790
> Change-Id: I0ac6e9cd8f5730154cc1842e267ca1ebfdebc874
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1763536
> Commit-Queue: Maya Lekova <mslekova@chromium.org>
> Reviewed-by: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#63378}
Bug: v8:7790
Change-Id: I54fbf4433a65681780fda4ded09ec2d145d36ec1
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1768361
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63391}
114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
// Copyright 2017 the V8 project authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "src/compiler/backend/instruction-scheduler.h"
|
|
#include "src/compiler/backend/instruction-selector-impl.h"
|
|
#include "src/compiler/backend/instruction.h"
|
|
|
|
#include "test/cctest/cctest.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
namespace compiler {
|
|
|
|
// Create InstructionBlocks with a single block.
|
|
InstructionBlocks* CreateSingleBlock(Zone* zone) {
|
|
InstructionBlock* block = new (zone)
|
|
InstructionBlock(zone, RpoNumber::FromInt(0), RpoNumber::Invalid(),
|
|
RpoNumber::Invalid(), false, false);
|
|
InstructionBlocks* blocks = zone->NewArray<InstructionBlocks>(1);
|
|
new (blocks) InstructionBlocks(1, block, zone);
|
|
return blocks;
|
|
}
|
|
|
|
// Wrapper around the InstructionScheduler.
|
|
class InstructionSchedulerTester {
|
|
public:
|
|
InstructionSchedulerTester()
|
|
: scope_(),
|
|
blocks_(CreateSingleBlock(scope_.main_zone())),
|
|
sequence_(scope_.main_isolate(), scope_.main_zone(), blocks_),
|
|
scheduler_(scope_.main_zone(), &sequence_) {}
|
|
|
|
void StartBlock() { scheduler_.StartBlock(RpoNumber::FromInt(0)); }
|
|
void EndBlock() { scheduler_.EndBlock(RpoNumber::FromInt(0)); }
|
|
void AddInstruction(Instruction* instr) { scheduler_.AddInstruction(instr); }
|
|
void AddTerminator(Instruction* instr) { scheduler_.AddTerminator(instr); }
|
|
|
|
void CheckHasSideEffect(Instruction* instr) {
|
|
CHECK(scheduler_.HasSideEffect(instr));
|
|
}
|
|
void CheckIsDeopt(Instruction* instr) { CHECK(instr->IsDeoptimizeCall()); }
|
|
|
|
void CheckInSuccessors(Instruction* instr, Instruction* successor) {
|
|
InstructionScheduler::ScheduleGraphNode* node = GetNode(instr);
|
|
InstructionScheduler::ScheduleGraphNode* succ_node = GetNode(successor);
|
|
|
|
ZoneDeque<InstructionScheduler::ScheduleGraphNode*>& successors =
|
|
node->successors();
|
|
CHECK_NE(std::find(successors.begin(), successors.end(), succ_node),
|
|
successors.end());
|
|
}
|
|
|
|
Zone* zone() { return scope_.main_zone(); }
|
|
|
|
private:
|
|
InstructionScheduler::ScheduleGraphNode* GetNode(Instruction* instr) {
|
|
for (auto node : scheduler_.graph_) {
|
|
if (node->instruction() == instr) return node;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
HandleAndZoneScope scope_;
|
|
InstructionBlocks* blocks_;
|
|
InstructionSequence sequence_;
|
|
InstructionScheduler scheduler_;
|
|
};
|
|
|
|
TEST(DeoptInMiddleOfBasicBlock) {
|
|
InstructionSchedulerTester tester;
|
|
Zone* zone = tester.zone();
|
|
|
|
tester.StartBlock();
|
|
InstructionCode jmp_opcode = kArchJmp;
|
|
// Dummy node for FlagsContinuation::ForDeoptimize (which won't accept
|
|
// nullptr).
|
|
Node* node = Node::New(zone, 0, nullptr, 0, nullptr, false);
|
|
FeedbackSource feedback;
|
|
FlagsContinuation cont = FlagsContinuation::ForDeoptimize(
|
|
kEqual, DeoptimizeKind::kEager, DeoptimizeReason::kUnknown, feedback,
|
|
node);
|
|
jmp_opcode = cont.Encode(jmp_opcode);
|
|
Instruction* jmp_inst = Instruction::New(zone, jmp_opcode);
|
|
tester.CheckIsDeopt(jmp_inst);
|
|
tester.AddInstruction(jmp_inst);
|
|
Instruction* side_effect_inst = Instruction::New(zone, kArchPrepareTailCall);
|
|
tester.CheckHasSideEffect(side_effect_inst);
|
|
tester.AddInstruction(side_effect_inst);
|
|
Instruction* other_jmp_inst = Instruction::New(zone, jmp_opcode);
|
|
tester.CheckIsDeopt(other_jmp_inst);
|
|
tester.AddInstruction(other_jmp_inst);
|
|
Instruction* ret_inst = Instruction::New(zone, kArchRet);
|
|
tester.AddTerminator(ret_inst);
|
|
|
|
// Check that an instruction with a side effect is a successor of the deopt.
|
|
tester.CheckInSuccessors(jmp_inst, side_effect_inst);
|
|
// Check that the second deopt is a successor of the first deopt.
|
|
tester.CheckInSuccessors(jmp_inst, other_jmp_inst);
|
|
// Check that the second deopt is a successor of the side-effect instruction.
|
|
tester.CheckInSuccessors(side_effect_inst, other_jmp_inst);
|
|
// Check that the block terminator is a successor of all other instructions.
|
|
tester.CheckInSuccessors(jmp_inst, ret_inst);
|
|
tester.CheckInSuccessors(side_effect_inst, ret_inst);
|
|
tester.CheckInSuccessors(other_jmp_inst, ret_inst);
|
|
|
|
// Schedule block.
|
|
tester.EndBlock();
|
|
}
|
|
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|