r331026 - [OpenCL] Add separate read_only and write_only pipe IR types
Sven van Haastregt via cfe-commits
cfe-commits at lists.llvm.org
Fri Apr 27 03:37:05 PDT 2018
Author: svenvh
Date: Fri Apr 27 03:37:04 2018
New Revision: 331026
URL: http://llvm.org/viewvc/llvm-project?rev=331026&view=rev
Log:
[OpenCL] Add separate read_only and write_only pipe IR types
SPIR-V encodes the read_only and write_only access qualifiers of pipes,
so separate LLVM IR types are required to target SPIR-V. Other backends
may also find this useful.
These new types are `opencl.pipe_ro_t` and `opencl.pipe_wo_t`, which
replace `opencl.pipe_t`.
This replaces __get_pipe_num_packets(...) and __get_pipe_max_packets(...)
which took a read_only pipe with separate versions for read_only and
write_only pipes, namely:
* __get_pipe_num_packets_ro(...)
* __get_pipe_num_packets_wo(...)
* __get_pipe_max_packets_ro(...)
* __get_pipe_max_packets_wo(...)
These separate versions exist to avoid needing a bitcast to one of the
two qualified pipe types.
Patch by Stuart Brady.
Differential Revision: https://reviews.llvm.org/D46015
Modified:
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/lib/CodeGen/CGOpenCLRuntime.cpp
cfe/trunk/lib/CodeGen/CGOpenCLRuntime.h
cfe/trunk/test/CodeGenOpenCL/opencl_types.cl
cfe/trunk/test/CodeGenOpenCL/pipe_builtin.cl
cfe/trunk/test/CodeGenOpenCL/pipe_types.cl
cfe/trunk/test/Index/pipe-size.cl
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Fri Apr 27 03:37:04 2018
@@ -3051,11 +3051,14 @@ RValue CodeGenFunction::EmitBuiltinExpr(
// OpenCL v2.0 s6.13.16.4 Built-in pipe query functions
case Builtin::BIget_pipe_num_packets:
case Builtin::BIget_pipe_max_packets: {
- const char *Name;
+ const char *BaseName;
+ const PipeType *PipeTy = E->getArg(0)->getType()->getAs<PipeType>();
if (BuiltinID == Builtin::BIget_pipe_num_packets)
- Name = "__get_pipe_num_packets";
+ BaseName = "__get_pipe_num_packets";
else
- Name = "__get_pipe_max_packets";
+ BaseName = "__get_pipe_max_packets";
+ auto Name = std::string(BaseName) +
+ std::string(PipeTy->isReadOnly() ? "_ro" : "_wo");
// Building the generic function prototype.
Value *Arg0 = EmitScalarExpr(E->getArg(0));
Modified: cfe/trunk/lib/CodeGen/CGOpenCLRuntime.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGOpenCLRuntime.cpp?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGOpenCLRuntime.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGOpenCLRuntime.cpp Fri Apr 27 03:37:04 2018
@@ -66,13 +66,19 @@ llvm::Type *CGOpenCLRuntime::convertOpen
}
llvm::Type *CGOpenCLRuntime::getPipeType(const PipeType *T) {
- if (!PipeTy){
- uint32_t PipeAddrSpc = CGM.getContext().getTargetAddressSpace(
- CGM.getContext().getOpenCLTypeAddrSpace(T));
- PipeTy = llvm::PointerType::get(llvm::StructType::create(
- CGM.getLLVMContext(), "opencl.pipe_t"), PipeAddrSpc);
- }
+ if (T->isReadOnly())
+ return getPipeType(T, "opencl.pipe_ro_t", PipeROTy);
+ else
+ return getPipeType(T, "opencl.pipe_wo_t", PipeWOTy);
+}
+llvm::Type *CGOpenCLRuntime::getPipeType(const PipeType *T, StringRef Name,
+ llvm::Type *&PipeTy) {
+ if (!PipeTy)
+ PipeTy = llvm::PointerType::get(llvm::StructType::create(
+ CGM.getLLVMContext(), Name),
+ CGM.getContext().getTargetAddressSpace(
+ CGM.getContext().getOpenCLTypeAddrSpace(T)));
return PipeTy;
}
Modified: cfe/trunk/lib/CodeGen/CGOpenCLRuntime.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGOpenCLRuntime.h?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGOpenCLRuntime.h (original)
+++ cfe/trunk/lib/CodeGen/CGOpenCLRuntime.h Fri Apr 27 03:37:04 2018
@@ -35,7 +35,8 @@ class CodeGenModule;
class CGOpenCLRuntime {
protected:
CodeGenModule &CGM;
- llvm::Type *PipeTy;
+ llvm::Type *PipeROTy;
+ llvm::Type *PipeWOTy;
llvm::PointerType *SamplerTy;
/// Structure for enqueued block information.
@@ -47,9 +48,12 @@ protected:
/// Maps block expression to block information.
llvm::DenseMap<const Expr *, EnqueuedBlockInfo> EnqueuedBlockMap;
+ virtual llvm::Type *getPipeType(const PipeType *T, StringRef Name,
+ llvm::Type *&PipeTy);
+
public:
- CGOpenCLRuntime(CodeGenModule &CGM) : CGM(CGM), PipeTy(nullptr),
- SamplerTy(nullptr) {}
+ CGOpenCLRuntime(CodeGenModule &CGM) : CGM(CGM),
+ PipeROTy(nullptr), PipeWOTy(nullptr), SamplerTy(nullptr) {}
virtual ~CGOpenCLRuntime();
/// Emit the IR required for a work-group-local variable declaration, and add
Modified: cfe/trunk/test/CodeGenOpenCL/opencl_types.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenOpenCL/opencl_types.cl?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenOpenCL/opencl_types.cl (original)
+++ cfe/trunk/test/CodeGenOpenCL/opencl_types.cl Fri Apr 27 03:37:04 2018
@@ -63,9 +63,13 @@ kernel void foo(image1d_t img) {
// CHECK-AMDGCN: call {{.*}}void @fnc4smp(%opencl.sampler_t addrspace(4)*
}
-kernel void foo_pipe(read_only pipe int p) {}
-// CHECK-SPIR: @foo_pipe(%opencl.pipe_t addrspace(1)* %p)
-// CHECK_AMDGCN: @foo_pipe(%opencl.pipe_t addrspace(1)* %p)
+kernel void foo_ro_pipe(read_only pipe int p) {}
+// CHECK-SPIR: @foo_ro_pipe(%opencl.pipe_ro_t addrspace(1)* %p)
+// CHECK_AMDGCN: @foo_ro_pipe(%opencl.pipe_ro_t addrspace(1)* %p)
+
+kernel void foo_wo_pipe(write_only pipe int p) {}
+// CHECK-SPIR: @foo_wo_pipe(%opencl.pipe_wo_t addrspace(1)* %p)
+// CHECK_AMDGCN: @foo_wo_pipe(%opencl.pipe_wo_t addrspace(1)* %p)
void __attribute__((overloadable)) bad1(image1d_t b, image2d_t c, image2d_t d) {}
// CHECK-SPIR-LABEL: @{{_Z4bad114ocl_image1d_ro14ocl_image2d_roS0_|"\\01\?bad1@@\$\$J0YAXPAUocl_image1d_ro@@PAUocl_image2d_ro@@1 at Z"}}
Modified: cfe/trunk/test/CodeGenOpenCL/pipe_builtin.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenOpenCL/pipe_builtin.cl?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenOpenCL/pipe_builtin.cl (original)
+++ cfe/trunk/test/CodeGenOpenCL/pipe_builtin.cl Fri Apr 27 03:37:04 2018
@@ -1,68 +1,76 @@
// RUN: %clang_cc1 -emit-llvm -cl-ext=+cl_khr_subgroups -O0 -cl-std=CL2.0 -o - %s | FileCheck %s
-// CHECK: %opencl.pipe_t = type opaque
-// CHECK: %opencl.reserve_id_t = type opaque
+// CHECK-DAG: %opencl.pipe_ro_t = type opaque
+// CHECK-DAG: %opencl.pipe_wo_t = type opaque
+// CHECK-DAG: %opencl.reserve_id_t = type opaque
#pragma OPENCL EXTENSION cl_khr_subgroups : enable
void test1(read_only pipe int p, global int *ptr) {
- // CHECK: call i32 @__read_pipe_2(%opencl.pipe_t* %{{.*}}, i8* %{{.*}}, i32 4, i32 4)
+ // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 4, i32 4)
read_pipe(p, ptr);
- // CHECK: call %opencl.reserve_id_t* @__reserve_read_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__reserve_read_pipe(%opencl.pipe_ro_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = reserve_read_pipe(p, 2);
- // CHECK: call i32 @__read_pipe_4(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 {{.*}}, i8* %{{.*}}, i32 4, i32 4)
+ // CHECK: call i32 @__read_pipe_4(%opencl.pipe_ro_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 {{.*}}, i8* %{{.*}}, i32 4, i32 4)
read_pipe(p, rid, 2, ptr);
- // CHECK: call void @__commit_read_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__commit_read_pipe(%opencl.pipe_ro_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
commit_read_pipe(p, rid);
}
void test2(write_only pipe int p, global int *ptr) {
- // CHECK: call i32 @__write_pipe_2(%opencl.pipe_t* %{{.*}}, i8* %{{.*}}, i32 4, i32 4)
+ // CHECK: call i32 @__write_pipe_2(%opencl.pipe_wo_t* %{{.*}}, i8* %{{.*}}, i32 4, i32 4)
write_pipe(p, ptr);
- // CHECK: call %opencl.reserve_id_t* @__reserve_write_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__reserve_write_pipe(%opencl.pipe_wo_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = reserve_write_pipe(p, 2);
- // CHECK: call i32 @__write_pipe_4(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 {{.*}}, i8* %{{.*}}, i32 4, i32 4)
+ // CHECK: call i32 @__write_pipe_4(%opencl.pipe_wo_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 {{.*}}, i8* %{{.*}}, i32 4, i32 4)
write_pipe(p, rid, 2, ptr);
- // CHECK: call void @__commit_write_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__commit_write_pipe(%opencl.pipe_wo_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
commit_write_pipe(p, rid);
}
void test3(read_only pipe int p, global int *ptr) {
- // CHECK: call %opencl.reserve_id_t* @__work_group_reserve_read_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__work_group_reserve_read_pipe(%opencl.pipe_ro_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = work_group_reserve_read_pipe(p, 2);
- // CHECK: call void @__work_group_commit_read_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__work_group_commit_read_pipe(%opencl.pipe_ro_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
work_group_commit_read_pipe(p, rid);
}
void test4(write_only pipe int p, global int *ptr) {
- // CHECK: call %opencl.reserve_id_t* @__work_group_reserve_write_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__work_group_reserve_write_pipe(%opencl.pipe_wo_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = work_group_reserve_write_pipe(p, 2);
- // CHECK: call void @__work_group_commit_write_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__work_group_commit_write_pipe(%opencl.pipe_wo_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
work_group_commit_write_pipe(p, rid);
}
void test5(read_only pipe int p, global int *ptr) {
- // CHECK: call %opencl.reserve_id_t* @__sub_group_reserve_read_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__sub_group_reserve_read_pipe(%opencl.pipe_ro_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = sub_group_reserve_read_pipe(p, 2);
- // CHECK: call void @__sub_group_commit_read_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__sub_group_commit_read_pipe(%opencl.pipe_ro_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
sub_group_commit_read_pipe(p, rid);
}
void test6(write_only pipe int p, global int *ptr) {
- // CHECK: call %opencl.reserve_id_t* @__sub_group_reserve_write_pipe(%opencl.pipe_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
+ // CHECK: call %opencl.reserve_id_t* @__sub_group_reserve_write_pipe(%opencl.pipe_wo_t* %{{.*}}, i32 {{.*}}, i32 4, i32 4)
reserve_id_t rid = sub_group_reserve_write_pipe(p, 2);
- // CHECK: call void @__sub_group_commit_write_pipe(%opencl.pipe_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call void @__sub_group_commit_write_pipe(%opencl.pipe_wo_t* %{{.*}}, %opencl.reserve_id_t* %{{.*}}, i32 4, i32 4)
sub_group_commit_write_pipe(p, rid);
}
-void test7(write_only pipe int p, global int *ptr) {
- // CHECK: call i32 @__get_pipe_num_packets(%opencl.pipe_t* %{{.*}}, i32 4, i32 4)
+void test7(read_only pipe int p, global int *ptr) {
+ // CHECK: call i32 @__get_pipe_num_packets_ro(%opencl.pipe_ro_t* %{{.*}}, i32 4, i32 4)
*ptr = get_pipe_num_packets(p);
- // CHECK: call i32 @__get_pipe_max_packets(%opencl.pipe_t* %{{.*}}, i32 4, i32 4)
+ // CHECK: call i32 @__get_pipe_max_packets_ro(%opencl.pipe_ro_t* %{{.*}}, i32 4, i32 4)
*ptr = get_pipe_max_packets(p);
}
-void test8(read_only pipe int r, write_only pipe int w, global int *ptr) {
+void test8(write_only pipe int p, global int *ptr) {
+ // CHECK: call i32 @__get_pipe_num_packets_wo(%opencl.pipe_wo_t* %{{.*}}, i32 4, i32 4)
+ *ptr = get_pipe_num_packets(p);
+ // CHECK: call i32 @__get_pipe_max_packets_wo(%opencl.pipe_wo_t* %{{.*}}, i32 4, i32 4)
+ *ptr = get_pipe_max_packets(p);
+}
+
+void test9(read_only pipe int r, write_only pipe int w, global int *ptr) {
// verify that return type is correctly casted to i1 value
// CHECK: %[[R:[0-9]+]] = call i32 @__read_pipe_2
// CHECK: icmp ne i32 %[[R]], 0
@@ -70,10 +78,16 @@ void test8(read_only pipe int r, write_o
// CHECK: %[[W:[0-9]+]] = call i32 @__write_pipe_2
// CHECK: icmp ne i32 %[[W]], 0
if (write_pipe(w, ptr)) *ptr = -1;
- // CHECK: %[[N:[0-9]+]] = call i32 @__get_pipe_num_packets
- // CHECK: icmp ne i32 %[[N]], 0
+ // CHECK: %[[NR:[0-9]+]] = call i32 @__get_pipe_num_packets_ro
+ // CHECK: icmp ne i32 %[[NR]], 0
if (get_pipe_num_packets(r)) *ptr = -1;
- // CHECK: %[[M:[0-9]+]] = call i32 @__get_pipe_max_packets
- // CHECK: icmp ne i32 %[[M]], 0
+ // CHECK: %[[NW:[0-9]+]] = call i32 @__get_pipe_num_packets_wo
+ // CHECK: icmp ne i32 %[[NW]], 0
+ if (get_pipe_num_packets(w)) *ptr = -1;
+ // CHECK: %[[MR:[0-9]+]] = call i32 @__get_pipe_max_packets_ro
+ // CHECK: icmp ne i32 %[[MR]], 0
+ if (get_pipe_max_packets(r)) *ptr = -1;
+ // CHECK: %[[MW:[0-9]+]] = call i32 @__get_pipe_max_packets_wo
+ // CHECK: icmp ne i32 %[[MW]], 0
if (get_pipe_max_packets(w)) *ptr = -1;
}
Modified: cfe/trunk/test/CodeGenOpenCL/pipe_types.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenOpenCL/pipe_types.cl?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenOpenCL/pipe_types.cl (original)
+++ cfe/trunk/test/CodeGenOpenCL/pipe_types.cl Fri Apr 27 03:37:04 2018
@@ -1,34 +1,35 @@
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL2.0 -o - %s | FileCheck %s
-// CHECK: %opencl.pipe_t = type opaque
+// CHECK: %opencl.pipe_ro_t = type opaque
+// CHECK: %opencl.pipe_wo_t = type opaque
typedef unsigned char __attribute__((ext_vector_type(3))) uchar3;
typedef int __attribute__((ext_vector_type(4))) int4;
void test1(read_only pipe int p) {
-// CHECK: define void @test1(%opencl.pipe_t* %p)
+// CHECK: define void @test1(%opencl.pipe_ro_t* %p)
reserve_id_t rid;
// CHECK: %rid = alloca %opencl.reserve_id_t
}
void test2(write_only pipe float p) {
-// CHECK: define void @test2(%opencl.pipe_t* %p)
+// CHECK: define void @test2(%opencl.pipe_wo_t* %p)
}
void test3(read_only pipe const int p) {
-// CHECK: define void @test3(%opencl.pipe_t* %p)
+// CHECK: define void @test3(%opencl.pipe_ro_t* %p)
}
void test4(read_only pipe uchar3 p) {
-// CHECK: define void @test4(%opencl.pipe_t* %p)
+// CHECK: define void @test4(%opencl.pipe_ro_t* %p)
}
void test5(read_only pipe int4 p) {
-// CHECK: define void @test5(%opencl.pipe_t* %p)
+// CHECK: define void @test5(%opencl.pipe_ro_t* %p)
}
typedef read_only pipe int MyPipe;
kernel void test6(MyPipe p) {
-// CHECK: define spir_kernel void @test6(%opencl.pipe_t* %p)
+// CHECK: define spir_kernel void @test6(%opencl.pipe_ro_t* %p)
}
struct Person {
@@ -41,7 +42,7 @@ void test_reserved_read_pipe(global stru
read_only pipe struct Person SPipe) {
// CHECK: define void @test_reserved_read_pipe
read_pipe (SPipe, SDst);
- // CHECK: call i32 @__read_pipe_2(%opencl.pipe_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
+ // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
read_pipe (SPipe, SDst);
- // CHECK: call i32 @__read_pipe_2(%opencl.pipe_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
+ // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
}
Modified: cfe/trunk/test/Index/pipe-size.cl
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Index/pipe-size.cl?rev=331026&r1=331025&r2=331026&view=diff
==============================================================================
--- cfe/trunk/test/Index/pipe-size.cl (original)
+++ cfe/trunk/test/Index/pipe-size.cl Fri Apr 27 03:37:04 2018
@@ -5,12 +5,12 @@
__kernel void testPipe( pipe int test )
{
int s = sizeof(test);
- // X86: store %opencl.pipe_t* %test, %opencl.pipe_t** %test.addr, align 8
+ // X86: store %opencl.pipe_ro_t* %test, %opencl.pipe_ro_t** %test.addr, align 8
// X86: store i32 8, i32* %s, align 4
- // SPIR: store %opencl.pipe_t addrspace(1)* %test, %opencl.pipe_t addrspace(1)** %test.addr, align 4
+ // SPIR: store %opencl.pipe_ro_t addrspace(1)* %test, %opencl.pipe_ro_t addrspace(1)** %test.addr, align 4
// SPIR: store i32 4, i32* %s, align 4
- // SPIR64: store %opencl.pipe_t addrspace(1)* %test, %opencl.pipe_t addrspace(1)** %test.addr, align 8
+ // SPIR64: store %opencl.pipe_ro_t addrspace(1)* %test, %opencl.pipe_ro_t addrspace(1)** %test.addr, align 8
// SPIR64: store i32 8, i32* %s, align 4
- // AMDGCN: store %opencl.pipe_t addrspace(1)* %test, %opencl.pipe_t addrspace(1)* addrspace(5)* %test.addr, align 8
+ // AMDGCN: store %opencl.pipe_ro_t addrspace(1)* %test, %opencl.pipe_ro_t addrspace(1)* addrspace(5)* %test.addr, align 8
// AMDGCN: store i32 8, i32 addrspace(5)* %s, align 4
}
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