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v8/test/unittests/compiler/linkage-tail-call-unittest.cc
Michael Achenbach fb8efb12fa Revert "[arm64] Preparation for padding of arguments" 
This reverts commit bcf1172992.

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/16791

The test cctest/test-run-tail-calls/FuzzStackParamCount hangs on
the nosnap debug bot and times out.

Original change's description:
> [arm64] Preparation for padding of arguments
> 
> As part of JSSP removal, we need to align the arguments passed to functions
> on the stack, by adding a padding slot when the total number of arguments
> is odd.
> 
> This patch introduces the kPadArguments flag (which is currently set to
> false for all architectures), which will control padding of arguments in
> architecture-independent parts of the code (deoptimizer, instruction
> selector).
> 
> It also adds some executable tests for tail calls with various stack
> parameter counts on the caller and callee sides.
> 
> This will be turned on for arm64 together with arm64-specific changes to
> the code generator, the MacroAsembler and the builtins, in a later patch.
> 
> Bug: v8:6644
> Change-Id: I79a5c149123fe8130cedd1ccffec3d9b50361e08
> Reviewed-on: https://chromium-review.googlesource.com/806554
> Commit-Queue: Georgia Kouveli <georgia.kouveli@arm.com>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#50134}

TBR=rmcilroy@chromium.org,jarin@chromium.org,georgia.kouveli@arm.com

Change-Id: Iff4d7da418204834822842b160eacb8980058172
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6644
Reviewed-on: https://chromium-review.googlesource.com/830847
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50144}
2017-12-16 10:20:38 +00:00

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// Copyright 2014 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/common-operator.h"
#include "src/compiler/graph.h"
#include "src/compiler/linkage.h"
#include "src/compiler/node.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace compiler {
namespace {
MachineType kMachineTypes[] = {
MachineType::AnyTagged(), MachineType::AnyTagged(),
MachineType::AnyTagged(), MachineType::AnyTagged(),
MachineType::AnyTagged(), MachineType::AnyTagged(),
MachineType::AnyTagged(), MachineType::AnyTagged()};
}
class LinkageTailCall : public TestWithZone {
protected:
CallDescriptor* NewStandardCallDescriptor(LocationSignature* locations) {
DCHECK(arraysize(kMachineTypes) >=
locations->return_count() + locations->parameter_count());
USE(kMachineTypes);
return new (zone()) CallDescriptor(
CallDescriptor::kCallCodeObject, MachineType::AnyTagged(),
LinkageLocation::ForAnyRegister(MachineType::Pointer()),
locations, // location_sig
0, // js_parameter_count
Operator::kNoProperties, // properties
0, // callee-saved
0, // callee-saved fp
CallDescriptor::kNoFlags, // flags,
"");
}
LinkageLocation StackLocation(int loc) {
return LinkageLocation::ForCallerFrameSlot(-loc, MachineType::Pointer());
}
LinkageLocation RegisterLocation(int loc) {
return LinkageLocation::ForRegister(loc, MachineType::Pointer());
}
};
TEST_F(LinkageTailCall, EmptyToEmpty) {
LocationSignature locations(0, 0, nullptr);
CallDescriptor* desc = NewStandardCallDescriptor(&locations);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc->CanTailCall(node));
const CallDescriptor* callee = CallDescriptorOf(node->op());
int stack_param_delta = callee->GetStackParameterDelta(desc);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, SameReturn) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0)};
LocationSignature locations1(1, 0, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations1);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, DifferingReturn) {
// Caller
LinkageLocation location_array1[] = {RegisterLocation(0)};
LocationSignature locations1(1, 0, location_array1);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
LinkageLocation location_array2[] = {RegisterLocation(1)};
LocationSignature locations2(1, 0, location_array2);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(!desc1->CanTailCall(node));
}
TEST_F(LinkageTailCall, MoreRegisterParametersCallee) {
// Caller
LinkageLocation location_array1[] = {RegisterLocation(0)};
LocationSignature locations1(1, 0, location_array1);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
LinkageLocation location_array2[] = {RegisterLocation(0),
RegisterLocation(0)};
LocationSignature locations2(1, 1, location_array2);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, MoreRegisterParametersCaller) {
// Caller
LinkageLocation location_array1[] = {RegisterLocation(0),
RegisterLocation(0)};
LocationSignature locations1(1, 1, location_array1);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
LinkageLocation location_array2[] = {RegisterLocation(0)};
LocationSignature locations2(1, 0, location_array2);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, MoreRegisterAndStackParametersCallee) {
// Caller
LinkageLocation location_array1[] = {RegisterLocation(0)};
LocationSignature locations1(1, 0, location_array1);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
LinkageLocation location_array2[] = {RegisterLocation(0), RegisterLocation(0),
RegisterLocation(1), StackLocation(1)};
LocationSignature locations2(1, 3, location_array2);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(1, stack_param_delta);
}
TEST_F(LinkageTailCall, MoreRegisterAndStackParametersCaller) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), RegisterLocation(0),
RegisterLocation(1), StackLocation(1)};
LocationSignature locations1(1, 3, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Callee
LinkageLocation location_array2[] = {RegisterLocation(0)};
LocationSignature locations2(1, 0, location_array2);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
const Operator* op = common.Call(desc2);
Node* const node = Node::New(zone(), 1, op, 0, nullptr, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(-1, stack_param_delta);
}
TEST_F(LinkageTailCall, MatchingStackParameters) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), StackLocation(1)};
LocationSignature locations1(1, 3, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 3, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations1);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, NonMatchingStackParameters) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), StackLocation(1)};
LocationSignature locations1(1, 3, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 3, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations1);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, MatchingStackParametersExtraCallerRegisters) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), StackLocation(1),
RegisterLocation(0), RegisterLocation(1)};
LocationSignature locations1(1, 5, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 3, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations1);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, MatchingStackParametersExtraCalleeRegisters) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), StackLocation(1),
RegisterLocation(0), RegisterLocation(1)};
LocationSignature locations1(1, 3, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 5, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations1);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* p4 = Node::New(zone(), 0, common.Parameter(3), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3, p4};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(0, stack_param_delta);
}
TEST_F(LinkageTailCall, MatchingStackParametersExtraCallerRegistersAndStack) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), StackLocation(1),
RegisterLocation(0), StackLocation(4)};
LocationSignature locations1(1, 5, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 3, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* p4 = Node::New(zone(), 0, common.Parameter(3), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3, p4};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(-1, stack_param_delta);
}
TEST_F(LinkageTailCall, MatchingStackParametersExtraCalleeRegistersAndStack) {
// Caller
LinkageLocation location_array[] = {RegisterLocation(0), StackLocation(3),
StackLocation(2), RegisterLocation(0),
RegisterLocation(1), StackLocation(4)};
LocationSignature locations1(1, 3, location_array);
CallDescriptor* desc1 = NewStandardCallDescriptor(&locations1);
// Caller
LocationSignature locations2(1, 5, location_array);
CallDescriptor* desc2 = NewStandardCallDescriptor(&locations2);
CommonOperatorBuilder common(zone());
Node* p0 = Node::New(zone(), 0, nullptr, 0, nullptr, false);
Node* p1 = Node::New(zone(), 0, common.Parameter(0), 0, nullptr, false);
Node* p2 = Node::New(zone(), 0, common.Parameter(1), 0, nullptr, false);
Node* p3 = Node::New(zone(), 0, common.Parameter(2), 0, nullptr, false);
Node* p4 = Node::New(zone(), 0, common.Parameter(3), 0, nullptr, false);
Node* parameters[] = {p0, p1, p2, p3, p4};
const Operator* op = common.Call(desc2);
Node* const node =
Node::New(zone(), 1, op, arraysize(parameters), parameters, false);
EXPECT_TRUE(desc1->CanTailCall(node));
int stack_param_delta = desc2->GetStackParameterDelta(desc1);
EXPECT_EQ(1, stack_param_delta);
}
} // namespace compiler
} // namespace internal
} // namespace v8
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