[OPENMP]Use the attributes for dso locality when building for device.

Currently, we ignore all dso locality attributes/info when building for
the device and thus all symblos are externally visible and can be
preemted at the runtime. It may lead to incorrect results. We need to
follow the same logic, compiler uses for static/pie builds.

llvm-svn: 361283

clang/lib/CodeGen/CodeGenModule.cpp

@@ -798,7 +798,7 @@ static bool shouldAssumeDSOLocal(const CodeGenModule &CGM,
   const auto &CGOpts = CGM.getCodeGenOpts();
   llvm::Reloc::Model RM = CGOpts.RelocationModel;
   const auto &LOpts = CGM.getLangOpts();
-  if (RM != llvm::Reloc::Static && !LOpts.PIE)
+  if (RM != llvm::Reloc::Static && !LOpts.PIE && !LOpts.OpenMPIsDevice)
     return false;
 
   // A definition cannot be preempted from an executable.

clang/test/OpenMP/declare_target_codegen.cpp

@@ -16,22 +16,22 @@
 // CHECK-DAG: Bake
 // CHECK-NOT: @{{hhh|ggg|fff|eee}} =
 // CHECK-DAG: @aaa = external global i32,
-// CHECK-DAG: @bbb = global i32 0,
+// CHECK-DAG: @bbb ={{ dso_local | }}global i32 0,
 // CHECK-DAG: weak constant %struct.__tgt_offload_entry { i8* bitcast (i32* @bbb to i8*),
 // CHECK-DAG: @ccc = external global i32,
-// CHECK-DAG: @ddd = global i32 0,
+// CHECK-DAG: @ddd ={{ dso_local | }}global i32 0,
 // CHECK-DAG: @hhh_decl_tgt_link_ptr = common global i32* null
 // CHECK-DAG: @ggg_decl_tgt_link_ptr = common global i32* null
 // CHECK-DAG: @fff_decl_tgt_link_ptr = common global i32* null
 // CHECK-DAG: @eee_decl_tgt_link_ptr = common global i32* null
 // CHECK-DAG: @{{.*}}maini1{{.*}}aaa = internal global i64 23,
-// CHECK-DAG: @b = global i32 15,
-// CHECK-DAG: @d = global i32 0,
+// CHECK-DAG: @b ={{ dso_local | }}global i32 15,
+// CHECK-DAG: @d ={{ dso_local | }}global i32 0,
 // CHECK-DAG: @c = external global i32,
-// CHECK-DAG: @globals = global %struct.S zeroinitializer,
+// CHECK-DAG: @globals ={{ dso_local | }}global %struct.S zeroinitializer,
 // CHECK-DAG: [[STAT:@.+stat]] = internal global %struct.S zeroinitializer,
 // CHECK-DAG: [[STAT_REF:@.+]] = internal constant %struct.S* [[STAT]]
-// CHECK-DAG: @out_decl_target = global i32 0,
+// CHECK-DAG: @out_decl_target ={{ dso_local | }}global i32 0,
 // CHECK-DAG: @llvm.used = appending global [6 x i8*] [i8* bitcast (void ()* @__omp_offloading__{{.+}}_globals_l[[@LINE+80]]_ctor to i8*), i8* bitcast (void ()* @__omp_offloading__{{.+}}_stat_l[[@LINE+81]]_ctor to i8*),
 // CHECK-DAG: @llvm.compiler.used = appending global [1 x i8*] [i8* bitcast (%struct.S** [[STAT_REF]] to i8*)],
 

clang/test/OpenMP/nvptx_allocate_codegen.cpp

@@ -17,11 +17,11 @@ extern const omp_allocator_handle_t omp_pteam_mem_alloc;
 extern const omp_allocator_handle_t omp_thread_mem_alloc;
 
 // CHECK-DAG: @{{.+}}St1{{.+}}b{{.+}} = external global i32,
-// CHECK-DAG: @a = global i32 0,
-// CHECK-DAG: @b = addrspace(4) global i32 0,
-// CHECK-DAG: @c = global i32 0,
-// CHECK-DAG: @d = global %struct.St1 zeroinitializer,
-// CHECK-DAG: @{{.+}}ns{{.+}}a{{.+}} = addrspace(3) global i32 0,
+// CHECK-DAG: @a ={{ dso_local | }}global i32 0,
+// CHECK-DAG: @b ={{ dso_local | }}addrspace(4) global i32 0,
+// CHECK-DAG: @c ={{ dso_local | }}global i32 0,
+// CHECK-DAG: @d ={{ dso_local | }}global %struct.St1 zeroinitializer,
+// CHECK-DAG: @{{.+}}ns{{.+}}a{{.+}} ={{ dso_local | }}addrspace(3) global i32 0,
 // CHECK-DAG: @{{.+}}main{{.+}}a{{.*}} = internal global i32 0,
 // CHECK-DAG: @{{.+}}ST{{.+}}m{{.+}} = external global i32,
 // CHECK-DAG: @bar_c = internal global i32 0,
@@ -79,7 +79,7 @@ extern template int ST<int>::m;
 
 void baz(float &);
 
-// CHECK: define void @{{.+}}bar{{.+}}()
+// CHECK: define{{ dso_local | }}void @{{.+}}bar{{.+}}()
 void bar() {
   // CHECK: alloca float,
   float bar_a;

clang/test/OpenMP/nvptx_declare_target_var_ctor_dtor_codegen.cpp

@@ -16,9 +16,9 @@
 // SIMD-ONLY-NOT: {{__kmpc|__tgt}}
 
 // DEVICE-DAG: [[C_ADDR:.+]] = internal global i32 0,
-// DEVICE-DAG: [[CD_ADDR:@.+]] = global %struct.S zeroinitializer,
+// DEVICE-DAG: [[CD_ADDR:@.+]] ={{ dso_local | }}global %struct.S zeroinitializer,
 // HOST-DAG: @[[C_ADDR:.+]] = internal global i32 0,
-// HOST-DAG: @[[CD_ADDR:.+]] = global %struct.S zeroinitializer,
+// HOST-DAG: @[[CD_ADDR:.+]] ={{ dso_local | }}global %struct.S zeroinitializer,
 
 #pragma omp declare target
 int foo() { return 0; }
@@ -34,12 +34,12 @@ int car() { return 0; }
 #pragma omp declare target (bar)
 int caz() { return 0; }
 
-// DEVICE-DAG: define i32 [[FOO:@.*foo.*]]()
-// DEVICE-DAG: define i32 [[BAR:@.*bar.*]]()
-// DEVICE-DAG: define i32 [[BAZ:@.*baz.*]]()
-// DEVICE-DAG: define i32 [[DOO:@.*doo.*]]()
-// DEVICE-DAG: define i32 [[CAR:@.*car.*]]()
-// DEVICE-DAG: define i32 [[CAZ:@.*caz.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[FOO:@.*foo.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[BAR:@.*bar.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[BAZ:@.*baz.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[DOO:@.*doo.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[CAR:@.*car.*]]()
+// DEVICE-DAG: define{{ dso_local | }}i32 [[CAZ:@.*caz.*]]()
 
 static int c = foo() + bar() + baz();
 #pragma omp declare target (c)

clang/test/OpenMP/nvptx_target_codegen.cpp

@@ -573,7 +573,7 @@ int baz(int f, double &a) {
   // CHECK: [[EXIT]]
   // CHECK: ret void
 
-  // CHECK: define i32 [[BAZ]](i32 [[F:%.*]], double* dereferenceable{{.*}})
+  // CHECK: define{{ dso_local | }}i32 [[BAZ]](i32 [[F:%.*]], double* dereferenceable{{.*}})
   // CHECK: alloca i32,
   // CHECK: [[LOCAL_F_PTR:%.+]] = alloca i32,
   // CHECK: [[ZERO_ADDR:%.+]] = alloca i32,

clang/test/OpenMP/nvptx_unsupported_type_codegen.cpp

@@ -26,18 +26,18 @@ struct T1 {
 #pragma omp declare target
 T a = T();
 T f = a;
-// CHECK: define void @{{.+}}foo{{.+}}([[T]]* byval align {{.+}})
+// CHECK: define{{ dso_local | }}void @{{.+}}foo{{.+}}([[T]]* byval align {{.+}})
 void foo(T a = T()) {
   return;
 }
-// CHECK: define [6 x i64] @{{.+}}bar{{.+}}()
+// CHECK: define{{ dso_local | }}[6 x i64] @{{.+}}bar{{.+}}()
 T bar() {
 // CHECK:      bitcast [[T]]* %{{.+}} to [6 x i64]*
 // CHECK-NEXT: load [6 x i64], [6 x i64]* %{{.+}},
 // CHECK-NEXT: ret [6 x i64]
   return T();
 }
-// CHECK: define void @{{.+}}baz{{.+}}()
+// CHECK: define{{ dso_local | }}void @{{.+}}baz{{.+}}()
 void baz() {
 // CHECK:      call [6 x i64] @{{.+}}bar{{.+}}()
 // CHECK-NEXT: bitcast [[T]]* %{{.+}} to [6 x i64]*
@@ -46,17 +46,17 @@ void baz() {
 }
 T1 a1 = T1();
 T1 f1 = a1;
-// CHECK: define void @{{.+}}foo1{{.+}}([[T1]]* byval align {{.+}})
+// CHECK: define{{ dso_local | }}void @{{.+}}foo1{{.+}}([[T1]]* byval align {{.+}})
 void foo1(T1 a = T1()) {
   return;
 }
-// CHECK: define [[T1]] @{{.+}}bar1{{.+}}()
+// CHECK: define{{ dso_local | }}[[T1]] @{{.+}}bar1{{.+}}()
 T1 bar1() {
 // CHECK:      load [[T1]], [[T1]]*
 // CHECK-NEXT: ret [[T1]]
   return T1();
 }
-// CHECK: define void @{{.+}}baz1{{.+}}()
+// CHECK: define{{ dso_local | }}void @{{.+}}baz1{{.+}}()
 void baz1() {
 // CHECK: call [[T1]] @{{.+}}bar1{{.+}}()
   T1 t = bar1();