[XLA] Use "absl::" rather than "::absl".

Also move 'using' statements into namespaces.

PiperOrigin-RevId: 210055083

30 files changed, 74 insertions, 83 deletions

diff --git a/tensorflow/compiler/xla/literal.cc b/tensorflow/compiler/xla/literal.cc
index 5e64404240..30b890737b 100644
--- a/tensorflow/compiler/xla/literal.cc
+++ b/tensorflow/compiler/xla/literal.cc
@@ -37,13 +37,12 @@ limitations under the License.
 #include "tensorflow/core/platform/logging.h"
 #include "tensorflow/core/platform/types.h"
 
-using absl::StrCat;
-using tensorflow::strings::Printf;
-
 namespace xla {
-
 namespace {
 
+using absl::StrCat;
+using tensorflow::strings::Printf;
+
 constexpr bool kLittleEndian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__;
 
 // Converts between little and big endian.
diff --git a/tensorflow/compiler/xla/literal_util.cc b/tensorflow/compiler/xla/literal_util.cc
index 06b346251a..95d93acfe8 100644
--- a/tensorflow/compiler/xla/literal_util.cc
+++ b/tensorflow/compiler/xla/literal_util.cc
@@ -38,12 +38,11 @@ limitations under the License.
 #include "tensorflow/core/platform/mem.h"
 #include "tensorflow/core/platform/types.h"
 
-using absl::StrCat;
-
 namespace xla {
-
 namespace {
 
+using absl::StrCat;
+
 // Return a literal with all arrays of type FromNativeT converted to type
 // ToNativeT in the given literal.
 template <typename FromNativeT, typename ToNativeT>
diff --git a/tensorflow/compiler/xla/service/algebraic_simplifier_test.cc b/tensorflow/compiler/xla/service/algebraic_simplifier_test.cc
index af306072b1..ebf21ac151 100644
--- a/tensorflow/compiler/xla/service/algebraic_simplifier_test.cc
+++ b/tensorflow/compiler/xla/service/algebraic_simplifier_test.cc
@@ -37,11 +37,11 @@ limitations under the License.
 #include "tensorflow/compiler/xla/xla_data.pb.h"
 #include "tensorflow/core/lib/core/status_test_util.h"
 
-using ::testing::ElementsAre;
-
 namespace xla {
 namespace {
 
+using ::testing::ElementsAre;
+
 namespace op = xla::testing::opcode_matchers;
 
 AlgebraicSimplifier::ValidBitcastCallback bitcasting_callback() {
diff --git a/tensorflow/compiler/xla/service/buffer_assignment.cc b/tensorflow/compiler/xla/service/buffer_assignment.cc
index 7562353ad8..c8c36ae60e 100644
--- a/tensorflow/compiler/xla/service/buffer_assignment.cc
+++ b/tensorflow/compiler/xla/service/buffer_assignment.cc
@@ -40,16 +40,15 @@ limitations under the License.
 #include "tensorflow/core/lib/strings/stringprintf.h"
 
 namespace xla {
+namespace {
 
-using ::absl::StrAppend;
+using absl::StrAppend;
 using ::tensorflow::gtl::FlatMap;
 using ::tensorflow::gtl::FlatSet;
 using ::tensorflow::strings::Appendf;
 using ::tensorflow::strings::HumanReadableNumBytes;
 using ::tensorflow::strings::Printf;
 
-namespace {
-
 template <typename T>
 string ColocatedBufferSetsToString(const T& container, const char* title) {
   string result;
diff --git a/tensorflow/compiler/xla/service/call_graph.cc b/tensorflow/compiler/xla/service/call_graph.cc
index ff15cea674..37523a73ff 100644
--- a/tensorflow/compiler/xla/service/call_graph.cc
+++ b/tensorflow/compiler/xla/service/call_graph.cc
@@ -30,7 +30,7 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrCat;
+using absl::StrCat;
 using ::tensorflow::strings::Appendf;
 
 string CallContextToString(CallContext context) {
diff --git a/tensorflow/compiler/xla/service/copy_insertion.cc b/tensorflow/compiler/xla/service/copy_insertion.cc
index 8375fdbd9c..231d31d960 100644
--- a/tensorflow/compiler/xla/service/copy_insertion.cc
+++ b/tensorflow/compiler/xla/service/copy_insertion.cc
@@ -38,7 +38,7 @@ limitations under the License.
 namespace xla {
 namespace {
 
-using ::absl::StrAppend;
+using absl::StrAppend;
 
 bool IsEntryParameterValue(const HloValue& value) {
   const HloComputation* computation = value.defining_instruction()->parent();
diff --git a/tensorflow/compiler/xla/service/cpu/cpu_layout_assignment.cc b/tensorflow/compiler/xla/service/cpu/cpu_layout_assignment.cc
index 69acca86bf..bfecbd6e01 100644
--- a/tensorflow/compiler/xla/service/cpu/cpu_layout_assignment.cc
+++ b/tensorflow/compiler/xla/service/cpu/cpu_layout_assignment.cc
@@ -34,8 +34,8 @@ namespace cpu {
 // instruction stream.
 
 namespace {
-using ::absl::nullopt;
-using ::absl::optional;
+using absl::nullopt;
+using absl::optional;
 
 using ShouldMakeOperandColMajorCache =
     tensorflow::gtl::FlatMap<const HloInstruction*, bool>;
diff --git a/tensorflow/compiler/xla/service/gpu/multi_output_fusion_test.cc b/tensorflow/compiler/xla/service/gpu/multi_output_fusion_test.cc
index 3fc78e6786..236d526acf 100644
--- a/tensorflow/compiler/xla/service/gpu/multi_output_fusion_test.cc
+++ b/tensorflow/compiler/xla/service/gpu/multi_output_fusion_test.cc
@@ -23,11 +23,11 @@ limitations under the License.
 #include "tensorflow/compiler/xla/tests/hlo_test_base.h"
 #include "tensorflow/compiler/xla/util.h"
 
-namespace op = xla::testing::opcode_matchers;
-
 namespace xla {
 namespace gpu {
 
+namespace op = xla::testing::opcode_matchers;
+
 using MultiOutputFusionTest = HloTestBase;
 
 const char kModulePrefix[] = R"(
diff --git a/tensorflow/compiler/xla/service/hlo_alias_analysis.cc b/tensorflow/compiler/xla/service/hlo_alias_analysis.cc
index f77fc96815..0986da65cb 100644
--- a/tensorflow/compiler/xla/service/hlo_alias_analysis.cc
+++ b/tensorflow/compiler/xla/service/hlo_alias_analysis.cc
@@ -34,7 +34,7 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrAppend;
+using absl::StrAppend;
 
 // Data structure used to construct the alias analysis. Thrown away after alias
 // analysis is complete. This data structure keeps track of which sets of
diff --git a/tensorflow/compiler/xla/service/hlo_computation.cc b/tensorflow/compiler/xla/service/hlo_computation.cc
index b08d455e9a..cf95b112d7 100644
--- a/tensorflow/compiler/xla/service/hlo_computation.cc
+++ b/tensorflow/compiler/xla/service/hlo_computation.cc
@@ -44,7 +44,7 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrCat;
+using absl::StrCat;
 
 std::unique_ptr<HloComputation> HloComputation::Builder::Build(
     HloInstruction* root_instruction) {
diff --git a/tensorflow/compiler/xla/service/hlo_dataflow_analysis.cc b/tensorflow/compiler/xla/service/hlo_dataflow_analysis.cc
index 2ab11f6e1f..1d35757b42 100644
--- a/tensorflow/compiler/xla/service/hlo_dataflow_analysis.cc
+++ b/tensorflow/compiler/xla/service/hlo_dataflow_analysis.cc
@@ -78,8 +78,8 @@ bool MultiDynamicSliceUseShareSameIndices(
 
 }  // namespace
 
-using ::absl::StrAppend;
-using ::absl::StrCat;
+using absl::StrAppend;
+using absl::StrCat;
 
 HloDataflowAnalysis::HloDataflowAnalysis(
     const HloModule& module, bool ssa_form, bool bitcast_defines_value,
diff --git a/tensorflow/compiler/xla/service/hlo_graph_dumper.cc b/tensorflow/compiler/xla/service/hlo_graph_dumper.cc
index 78680f20d5..7a3f783a1f 100644
--- a/tensorflow/compiler/xla/service/hlo_graph_dumper.cc
+++ b/tensorflow/compiler/xla/service/hlo_graph_dumper.cc
@@ -49,19 +49,19 @@ limitations under the License.
 #include "tensorflow/core/platform/protobuf.h"
 #include "tensorflow/core/platform/regexp.h"
 
-using ::absl::nullopt;
-using ::absl::optional;
-using ::absl::StrAppend;
-using ::absl::StrCat;
-using ::absl::StrJoin;
-using ::tensorflow::Env;
-using ::tensorflow::WriteStringToFile;
-using ::tensorflow::io::JoinPath;
-
 namespace xla {
 namespace hlo_graph_dumper {
 namespace {
 
+using absl::nullopt;
+using absl::optional;
+using absl::StrAppend;
+using absl::StrCat;
+using absl::StrJoin;
+using tensorflow::Env;
+using tensorflow::WriteStringToFile;
+using tensorflow::io::JoinPath;
+
 // Helpers for Printf and Appendf.
 template <typename T>
 struct PrintfConvert {
diff --git a/tensorflow/compiler/xla/service/hlo_graph_dumper_test.cc b/tensorflow/compiler/xla/service/hlo_graph_dumper_test.cc
index 4b7d25e2f4..064c53252c 100644
--- a/tensorflow/compiler/xla/service/hlo_graph_dumper_test.cc
+++ b/tensorflow/compiler/xla/service/hlo_graph_dumper_test.cc
@@ -28,7 +28,7 @@ limitations under the License.
 namespace xla {
 namespace {
 
-using ::absl::StrCat;
+using absl::StrCat;
 using ::testing::HasSubstr;
 
 string TestName() {
diff --git a/tensorflow/compiler/xla/service/hlo_instruction.cc b/tensorflow/compiler/xla/service/hlo_instruction.cc
index a343934555..2bb9de686f 100644
--- a/tensorflow/compiler/xla/service/hlo_instruction.cc
+++ b/tensorflow/compiler/xla/service/hlo_instruction.cc
@@ -52,9 +52,9 @@ limitations under the License.
 namespace xla {
 
 using absl::CEscape;
-using ::absl::StrAppend;
-using ::absl::StrCat;
-using ::absl::StrJoin;
+using absl::StrAppend;
+using absl::StrCat;
+using absl::StrJoin;
 
 /* static */
 StatusOr<std::unique_ptr<HloInstruction>> HloInstruction::CreateFromProto(
diff --git a/tensorflow/compiler/xla/service/hlo_instructions.cc b/tensorflow/compiler/xla/service/hlo_instructions.cc
index 13cddafde1..a0de253eda 100644
--- a/tensorflow/compiler/xla/service/hlo_instructions.cc
+++ b/tensorflow/compiler/xla/service/hlo_instructions.cc
@@ -33,10 +33,10 @@ limitations under the License.
 namespace xla {
 namespace {
 
-using ::absl::CEscape;
-using ::absl::StrAppend;
-using ::absl::StrCat;
-using ::absl::StrJoin;
+using absl::CEscape;
+using absl::StrAppend;
+using absl::StrCat;
+using absl::StrJoin;
 
 bool IsInstructionElementwiseOnOperand(const HloInstruction* instruction,
                                        const HloInstruction* operand) {
diff --git a/tensorflow/compiler/xla/service/hlo_lexer.cc b/tensorflow/compiler/xla/service/hlo_lexer.cc
index ce93a7ed62..a2ad4c8315 100644
--- a/tensorflow/compiler/xla/service/hlo_lexer.cc
+++ b/tensorflow/compiler/xla/service/hlo_lexer.cc
@@ -27,11 +27,10 @@ limitations under the License.
 #include "tensorflow/core/platform/regexp.h"
 
 namespace xla {
-
-using ::absl::string_view;
-
 namespace {
 
+using absl::string_view;
+
 constexpr int kEOF = -1;
 constexpr int kError = -2;
 
diff --git a/tensorflow/compiler/xla/service/hlo_liveness_analysis.cc b/tensorflow/compiler/xla/service/hlo_liveness_analysis.cc
index fcde11c45e..3a1dd471c6 100644
--- a/tensorflow/compiler/xla/service/hlo_liveness_analysis.cc
+++ b/tensorflow/compiler/xla/service/hlo_liveness_analysis.cc
@@ -33,12 +33,11 @@ limitations under the License.
 #include "tensorflow/core/platform/logging.h"
 
 namespace xla {
+namespace {
 
 using Worklist = std::deque<const HloInstruction*>;
 using Workset = std::unordered_set<const HloInstruction*>;
 
-namespace {
-
 void AddToWorklist(const HloInstruction* instruction, Worklist* worklist,
                    Workset* workset) {
   if (workset->count(instruction) == 0) {
diff --git a/tensorflow/compiler/xla/service/hlo_parser.cc b/tensorflow/compiler/xla/service/hlo_parser.cc
index 6f016ddddf..df789e6222 100644
--- a/tensorflow/compiler/xla/service/hlo_parser.cc
+++ b/tensorflow/compiler/xla/service/hlo_parser.cc
@@ -35,11 +35,11 @@ namespace xla {
 
 namespace {
 
-using ::absl::nullopt;
-using ::absl::optional;
-using ::absl::StrAppend;
-using ::absl::StrCat;
-using ::absl::StrJoin;
+using absl::nullopt;
+using absl::optional;
+using absl::StrAppend;
+using absl::StrCat;
+using absl::StrJoin;
 using ::tensorflow::strings::Printf;
 
 const double kF16max = 65504;
diff --git a/tensorflow/compiler/xla/service/hlo_parser_test.cc b/tensorflow/compiler/xla/service/hlo_parser_test.cc
index e9800ff664..b3d3ccda74 100644
--- a/tensorflow/compiler/xla/service/hlo_parser_test.cc
+++ b/tensorflow/compiler/xla/service/hlo_parser_test.cc
@@ -24,13 +24,11 @@ limitations under the License.
 #include "tensorflow/core/lib/core/status_test_util.h"
 #include "tensorflow/core/platform/test.h"
 
-namespace op = ::xla::testing::opcode_matchers;
-
 namespace xla {
-
 namespace {
 
-using ::absl::string_view;
+namespace op = ::xla::testing::opcode_matchers;
+using absl::string_view;
 
 struct TestData {
   string test_name;
diff --git a/tensorflow/compiler/xla/service/hlo_pass_pipeline.cc b/tensorflow/compiler/xla/service/hlo_pass_pipeline.cc
index 0ffdc234b8..df99e131d8 100644
--- a/tensorflow/compiler/xla/service/hlo_pass_pipeline.cc
+++ b/tensorflow/compiler/xla/service/hlo_pass_pipeline.cc
@@ -27,12 +27,12 @@ limitations under the License.
 #include "tensorflow/core/lib/gtl/flatset.h"
 #include "tensorflow/core/platform/logging.h"
 
-using ::absl::StrAppend;
-using ::absl::StrCat;
-
 namespace xla {
-
 namespace {
+
+using absl::StrAppend;
+using absl::StrCat;
+
 void DumpModuleGraph(const HloModule& module, const string& message) {
   hlo_graph_dumper::MaybeDumpHloModule(module, message);
   VLOG(3) << "HLO " << message << ":";
diff --git a/tensorflow/compiler/xla/service/hlo_rematerialization.cc b/tensorflow/compiler/xla/service/hlo_rematerialization.cc
index a59c54218f..9cc1f5a10e 100644
--- a/tensorflow/compiler/xla/service/hlo_rematerialization.cc
+++ b/tensorflow/compiler/xla/service/hlo_rematerialization.cc
@@ -43,12 +43,11 @@ limitations under the License.
 #include "tensorflow/core/lib/strings/stringprintf.h"
 #include "tensorflow/core/platform/logging.h"
 
-using ::tensorflow::strings::HumanReadableNumBytes;
-
 namespace xla {
-
 namespace {
 
+using ::tensorflow::strings::HumanReadableNumBytes;
+
 // Potential optimizations:
 // . TODO(b/35244891): Avoid N^2 behavior by keeping a priority queue
 //   of candidates.
diff --git a/tensorflow/compiler/xla/service/hlo_scheduling.cc b/tensorflow/compiler/xla/service/hlo_scheduling.cc
index 9c7c7d3ca0..393824d920 100644
--- a/tensorflow/compiler/xla/service/hlo_scheduling.cc
+++ b/tensorflow/compiler/xla/service/hlo_scheduling.cc
@@ -31,12 +31,11 @@ limitations under the License.
 #include "tensorflow/core/lib/strings/stringprintf.h"
 #include "tensorflow/core/platform/logging.h"
 
-using ::tensorflow::strings::HumanReadableNumBytes;
-
 namespace xla {
-
 namespace {
 
+using ::tensorflow::strings::HumanReadableNumBytes;
+
 // Class implementing a list scheduler of HLO instructions which produces a
 // sequence which minimizes memory usage by preferring to schedule the node that
 // frees bigger buffer and defines smaller outputs.
diff --git a/tensorflow/compiler/xla/service/hlo_sharding.cc b/tensorflow/compiler/xla/service/hlo_sharding.cc
index 1a11937c93..980dae07ce 100644
--- a/tensorflow/compiler/xla/service/hlo_sharding.cc
+++ b/tensorflow/compiler/xla/service/hlo_sharding.cc
@@ -21,8 +21,8 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrCat;
-using ::absl::StrJoin;
+using absl::StrCat;
+using absl::StrJoin;
 
 HloSharding HloSharding::AssignDevice(int64 device_id) {
   return HloSharding(device_id);
diff --git a/tensorflow/compiler/xla/service/hlo_tfgraph_builder.cc b/tensorflow/compiler/xla/service/hlo_tfgraph_builder.cc
index 9d61125c63..f855212cc7 100644
--- a/tensorflow/compiler/xla/service/hlo_tfgraph_builder.cc
+++ b/tensorflow/compiler/xla/service/hlo_tfgraph_builder.cc
@@ -24,16 +24,16 @@ limitations under the License.
 #include "tensorflow/core/framework/op.h"
 #include "tensorflow/core/framework/tensor_shape.pb.h"
 
-using ::absl::StrAppend;
-using ::absl::StrCat;
-using ::tensorflow::GraphDef;
-using ::tensorflow::NodeDef;
-using ::tensorflow::TensorShapeProto;
-
 namespace xla {
 namespace hlo_graph_dumper {
 namespace {
 
+using absl::StrAppend;
+using absl::StrCat;
+using tensorflow::GraphDef;
+using tensorflow::NodeDef;
+using tensorflow::TensorShapeProto;
+
 string GetOpDefName(const HloInstruction* instruction) {
   string name = StrCat("hlo-", HloOpcodeString(instruction->opcode()));
   tensorflow::str_util::TitlecaseString(&name, "-");
diff --git a/tensorflow/compiler/xla/service/hlo_value.cc b/tensorflow/compiler/xla/service/hlo_value.cc
index f7dcba324b..e0c1326177 100644
--- a/tensorflow/compiler/xla/service/hlo_value.cc
+++ b/tensorflow/compiler/xla/service/hlo_value.cc
@@ -37,8 +37,8 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrAppend;
-using ::absl::StrCat;
+using absl::StrAppend;
+using absl::StrCat;
 
 const Shape& HloPosition::shape() const {
   return ShapeUtil::GetSubshape(instruction->shape(), index);
diff --git a/tensorflow/compiler/xla/service/reshape_mover_test.cc b/tensorflow/compiler/xla/service/reshape_mover_test.cc
index d727e441fc..fab4e797f3 100644
--- a/tensorflow/compiler/xla/service/reshape_mover_test.cc
+++ b/tensorflow/compiler/xla/service/reshape_mover_test.cc
@@ -29,10 +29,11 @@ limitations under the License.
 #include "tensorflow/compiler/xla/types.h"
 #include "tensorflow/compiler/xla/xla_data.pb.h"
 
-namespace op = xla::testing::opcode_matchers;
-
 namespace xla {
 namespace {
+
+namespace op = xla::testing::opcode_matchers;
+
 using ReshapeMoverTest = HloVerifiedTestBase;
 
 TEST_F(ReshapeMoverTest, ReshapesWithDifferentInputShapesNotMoved) {
diff --git a/tensorflow/compiler/xla/service/service.cc b/tensorflow/compiler/xla/service/service.cc
index eafb2fe7ac..d39a5191b8 100644
--- a/tensorflow/compiler/xla/service/service.cc
+++ b/tensorflow/compiler/xla/service/service.cc
@@ -55,7 +55,7 @@ limitations under the License.
 #include "tensorflow/core/platform/types.h"
 #include "tensorflow/core/util/ptr_util.h"
 
-using ::absl::StrCat;
+using absl::StrCat;
 using ::tensorflow::strings::Printf;
 
 namespace xla {
diff --git a/tensorflow/compiler/xla/service/shape_inference.cc b/tensorflow/compiler/xla/service/shape_inference.cc
index 68a90cdf3b..6a22f8bef4 100644
--- a/tensorflow/compiler/xla/service/shape_inference.cc
+++ b/tensorflow/compiler/xla/service/shape_inference.cc
@@ -38,13 +38,12 @@ limitations under the License.
 #include "tensorflow/core/platform/logging.h"
 #include "tensorflow/core/platform/protobuf.h"
 
-using absl::StrJoin;
-using tensorflow::strings::Printf;
-
 namespace xla {
-
 namespace {
 
+using absl::StrJoin;
+using tensorflow::strings::Printf;
+
 // Returns true if no element is present in slice more than once.
 bool AllUnique(tensorflow::gtl::ArraySlice<int64> slice) {
   return std::set<int64>(slice.begin(), slice.end()).size() == slice.size();
diff --git a/tensorflow/compiler/xla/service/transfer_manager.cc b/tensorflow/compiler/xla/service/transfer_manager.cc
index 131269d641..0c577ec67a 100644
--- a/tensorflow/compiler/xla/service/transfer_manager.cc
+++ b/tensorflow/compiler/xla/service/transfer_manager.cc
@@ -29,7 +29,7 @@ limitations under the License.
 #include "tensorflow/core/platform/macros.h"
 #include "tensorflow/core/platform/notification.h"
 
-using ::absl::StrCat;
+using absl::StrCat;
 
 namespace xla {
 /* static */ tensorflow::mutex
diff --git a/tensorflow/compiler/xla/shape_util.cc b/tensorflow/compiler/xla/shape_util.cc
index 3779775bff..9a3d1ba83d 100644
--- a/tensorflow/compiler/xla/shape_util.cc
+++ b/tensorflow/compiler/xla/shape_util.cc
@@ -47,8 +47,8 @@ limitations under the License.
 
 namespace xla {
 
-using ::absl::StrAppend;
-using ::absl::StrCat;
+using absl::StrAppend;
+using absl::StrCat;
 
 string ShapeIndex::ToString() const { return ShapeIndexView(*this).ToString(); }