turn on -Werror=type-limits in our Bazel CPU build

Summary:
We also fix any existing issues.

Test Plan: Built locally, rely on CI to confirm.

Reviewers: malfet

Subscribers:

Tasks:

Tags:

Pull Request resolved: https://github.com/pytorch/pytorch/pull/79139

Approved by: https://github.com/seemethere, https://github.com/osalpekar, https://github.com/albanD

.bazelrc

@@ -30,3 +30,24 @@ build:cpu-only --platform_suffix=-cpu-only
 build --copt=-isystem --copt=bazel-out/k8-fastbuild-cpu-only/bin
 # rules_cuda configuration
 build:cpu-only --@rules_cuda//cuda:enable_cuda=False
+
+# Set additional warnings to error level.
+#
+# Implementation notes:
+#  * we use file extensions to determine if we are using the C++
+#    compiler or the cuda compiler
+#  * we use ^// at the start of the regex to only permit matching
+#    PyTorch files. This excludes external repos.
+#
+# Note that because this is logically a command-line flag, it is
+# considered the word on what warnings are enabled. This has the
+# unfortunate consequence of preventing us from disabling an error at
+# the target level because those flags will come before these flags in
+# the action invocation. Instead we provide per-file exceptions after
+# this.
+#
+# On the bright side, this means we don't have to more broadly apply
+# the exceptions to an entire target.
+build \
+    --per_file_copt='^//.*\.(cpp|cc)$'@-Werror=type-limits            \
+    --per_file_copt=^//.*\.cu$@--compiler-options=-Werror=type-limits

aten/src/ATen/native/cpu/BinaryOpsKernel.cpp

@@ -12,6 +12,7 @@
 #include <ATen/native/cpu/Loops.h>
 #include <ATen/native/Math.h>
 #include <c10/macros/Macros.h>
+#include <c10/util/TypeSafeSignMath.h>
 #include <c10/util/copysign.h>
 
 namespace at {
@@ -133,7 +134,7 @@ void div_floor_kernel(TensorIteratorBase& iter) {
     AT_DISPATCH_INTEGRAL_TYPES(dtype, "div_floor_cpu", [&]() {
       cpu_kernel(iter, [](scalar_t a, scalar_t b) -> scalar_t {
         TORCH_CHECK(b != 0, "ZeroDivisionError");
-        if ((a < 0) != (b < 0)) {
+        if (c10::is_negative(a) != c10::is_negative(b)) {
           // Subtracts one from the results of truncation division if the
           // divisor and dividend have different sign(bit)s and the remainder of
           // the division is nonzero
@@ -198,7 +199,7 @@ void remainder_kernel(TensorIteratorBase& iter) {
       cpu_kernel(iter, [](scalar_t a, scalar_t b) -> scalar_t {
         TORCH_CHECK(b != 0, "ZeroDivisionError");
         scalar_t r = a % b;
-        if ((r != 0) && ((r < 0) != (b < 0))) {
+        if ((r != 0) && (c10::is_negative(r) != c10::is_negative(b))) {
           r += b;
         }
         return r;

aten/src/ATen/native/cpu/UnaryOpsKernel.cpp

@@ -20,6 +20,7 @@
 #include <c10/util/math_compat.h>
 #include <c10/util/MathConstants.h>
 #include <c10/core/Scalar.h>
+#include <c10/util/TypeSafeSignMath.h>
 #include <c10/util/irange.h>
 
 #if AT_MKL_ENABLED()
@@ -284,7 +285,7 @@ void sign_kernel(TensorIteratorBase& iter){
 
         cpu_kernel_vec(
           iter,
-          [=](scalar_t a) -> scalar_t { return (0 < a) - (a < 0); },
+          [=](scalar_t a) -> scalar_t { return (0 < a) - c10::is_negative(a); },
           [=](Vectorized<scalar_t> self_vec){
 
               // Comparison operators returns bitmask.
@@ -301,7 +302,7 @@ static void signbit_kernel(TensorIteratorBase& iter){
   // NOTE: signbit does not always support integral arguments.
   if (at::isIntegralType(iter.input_dtype(), /*includeBool=*/false)) {
     AT_DISPATCH_INTEGRAL_TYPES(iter.input_dtype(), "signbit_cpu", [&]() {
-      cpu_kernel(iter, [](scalar_t a) -> bool { return a < 0; }); });
+      cpu_kernel(iter, [](scalar_t a) -> bool { return c10::is_negative(a); }); });
   } else {
     AT_DISPATCH_FLOATING_TYPES_AND2(kBFloat16, ScalarType::Half, iter.input_dtype(), "signbit_cpu", [&]() {
       using opmath_t = at::opmath_type<scalar_t>;

caffe2/core/prof_dag_counters.cc

@@ -51,7 +51,7 @@ void ProfDAGCounters::AddPerOpStartTime(size_t op_id) {
     return;
   }
 
-  CAFFE_ENFORCE(op_id >= 0 && op_id < op_start_times_run_.size());
+  CAFFE_ENFORCE(op_id < op_start_times_run_.size());
   op_start_times_run_[op_id] = timer_.MilliSeconds();
 }
 
@@ -60,7 +60,7 @@ void ProfDAGCounters::AddPerOpEndTime(size_t op_id) {
     return;
   }
 
-  CAFFE_ENFORCE(op_id >= 0 && op_id < op_end_times_run_.size());
+  CAFFE_ENFORCE(op_id < op_end_times_run_.size());
   op_end_times_run_[op_id] = timer_.MilliSeconds();
 }
 
@@ -69,7 +69,7 @@ void ProfDAGCounters::AddPerOpAsyncEndTime(size_t op_id) {
     return;
   }
 
-  CAFFE_ENFORCE(op_id >= 0 && op_id < op_async_end_times_run_.size());
+  CAFFE_ENFORCE(op_id < op_async_end_times_run_.size());
   op_async_end_times_run_[op_id] = timer_.MilliSeconds();
 }
 

test/cpp/jit/test_lite_interpreter.cpp

@@ -563,8 +563,7 @@ TEST(LiteInterpreterTest, GetContainTypes) {
   std::stringstream ss;
   m._save_for_mobile(ss, {}, true);
 
-  auto contained_types = _get_mobile_model_contained_types(ss);
+  _get_mobile_model_contained_types(ss);
-  AT_ASSERT(contained_types.size() >= 0);
 }
 
 namespace {

test/cpp/jit/test_lite_trainer.cpp

@@ -384,19 +384,16 @@ TEST(LiteTrainerTest, RandomSamplerReturnsIndicesInCorrectRange) {
 
   std::vector<size_t> indices = sampler.next(3).value();
   for (auto i : indices) {
-    AT_ASSERT(i >= 0);
     AT_ASSERT(i < 10);
   }
 
   indices = sampler.next(5).value();
   for (auto i : indices) {
-    AT_ASSERT(i >= 0);
     AT_ASSERT(i < 10);
   }
 
   indices = sampler.next(2).value();
   for (auto i : indices) {
-    AT_ASSERT(i >= 0);
     AT_ASSERT(i < 10);
   }
 

torch/csrc/distributed/rpc/utils.cpp

@@ -492,8 +492,8 @@ std::vector<at::IValue> readWrappedPayload(
   // Read the additional payload remove it from the payload.
   // NOLINTNEXTLINE(cppcoreguidelines-init-variables)
   int64_t additionalPayloadSize;
+  TORCH_INTERNAL_ASSERT(payload.size() >= sizeof(int64_t));
   size_t indexToRead = payload.size() - sizeof(int64_t);
-  TORCH_INTERNAL_ASSERT(indexToRead >= 0);
   torch::utils::THP_decodeInt64Buffer(
       &additionalPayloadSize,
       reinterpret_cast<uint8_t*>(payload.data()) + indexToRead,

torch/csrc/jit/codegen/cuda/compute_at.cpp

@@ -905,7 +905,7 @@ ComputeAt::ComputeAt(
       " producer: ",
       producer_);
   TORCH_INTERNAL_ASSERT(
-      reference_position_ >= 0 && reference_position_ <= reference_->nDims(),
+      reference_position_ <= reference_->nDims(),
       "Invalid computeAt axis, received ",
       reference_position_,
       " but should be > -",

torch/csrc/jit/codegen/cuda/scheduler/mma_utils.cpp

@@ -186,7 +186,7 @@ void checkDimSize(
   ExpressionEvaluator const_eval(tv->fusion());
   for (auto axis_index : c10::irange(axis.size())) {
     TORCH_INTERNAL_ASSERT(
-        ((axis[axis_index] + tv->nDims()) >= 0) &&
+        ((axis[axis_index] + static_cast<int>(tv->nDims())) >= 0) &&
             (axis[axis_index] < (int)tv->nDims()),
         "CheckDimSize: axis position out of bound ",
         axis[axis_index],

torch/csrc/jit/codegen/cuda/transform_view.cpp

@@ -115,7 +115,7 @@ class MergeTransform final : public ViewTransform {
       const std::vector<IterDomain*>& new_root_domain,
       std::vector<IterDomain*>& rfactor_domain) override {
     TORCH_INTERNAL_ASSERT(
-        index_ >= 0 && (index_ + 1) < new_root_domain.size(),
+        (index_ + 1) < new_root_domain.size(),
         "Index: \t",
         index_,
         "\t Domain Size:\t",
@@ -174,7 +174,7 @@ class SplitTransform final : public ViewTransform {
       const std::vector<IterDomain*>& new_root_domain,
       std::vector<IterDomain*>& rfactor_domain) override {
     TORCH_INTERNAL_ASSERT(
-        index_ >= 0 && index_ < new_root_domain.size(),
+        index_ < new_root_domain.size(),
         "Index: \t",
         index_,
         "\t Domain Size:\t",
@@ -237,7 +237,7 @@ class KeepTransform final : public ViewTransform {
       const std::vector<IterDomain*>& new_root_domain,
       std::vector<IterDomain*>& rfactor_domain) override {
     TORCH_INTERNAL_ASSERT(
-        index_ >= 0 && index_ < new_root_domain.size(),
+        index_ < new_root_domain.size(),
         "Index: \t",
         index_,
         "\t Domain Size:\t",

torch/csrc/jit/mobile/function.cpp

@@ -211,13 +211,13 @@ c10::optional<std::function<void(Stack&)>> makeOperatorFunction(
           out_args.push_back(stack.back());
           stack.pop_back();
         }
-        size_t start_index = num_specified_args.value() - out_args.size();
         TORCH_CHECK(
-            start_index >= 0,
+            num_specified_args.value() >= out_args.size(),
             "The number of output arguments is: ",
             out_args.size(),
             ", which is more then the number of specified arguments: ",
             num_specified_args.value());
+        size_t start_index = num_specified_args.value() - out_args.size();
         for (size_t i = start_index; i < (args.size() - out_args.size()); ++i) {
           TORCH_CHECK(
               args[i].default_value().has_value(),

torch/csrc/jit/serialization/pickler.cpp

@@ -8,6 +8,7 @@
 #include <torch/csrc/jit/api/function_impl.h>
 #include <torch/csrc/jit/serialization/pickler.h>
 #include <string>
+#include <type_traits>
 
 namespace torch {
 namespace jit {
@@ -595,7 +596,9 @@ void Pickler::pushDict(const IValue& ivalue) {
 
   push<PickleOpCode>(PickleOpCode::EMPTY_DICT);
 
-  if (dict.size() >= 0) {
+  static_assert(
+      std::is_unsigned<decltype(dict.size())>::value,
+      "Expected size to be non-negative.");
   push<PickleOpCode>(PickleOpCode::MARK);
 
   // Sort the dict for deterministic keys
@@ -605,7 +608,6 @@ void Pickler::pushDict(const IValue& ivalue) {
   }
 
   push<PickleOpCode>(PickleOpCode::SETITEMS);
-  }
 
   endTypeTag(ivalue);
 }

torch/csrc/jit/tensorexpr/loopnest_randomization.cpp

@@ -574,9 +574,6 @@ void loopnestRandomization(int64_t seed, LoopNest& l) {
 
         case COMPRESS_BUFFER: {
           auto buffers = NodeFinder<Buf>::find(l.root_stmt());
-          if (buffers.size() < 0) {
-            break;
-          }
           int buffer_n = std::rand() % (int)buffers.size();
           auto buffer = buffers[buffer_n];
 
@@ -589,9 +586,6 @@ void loopnestRandomization(int64_t seed, LoopNest& l) {
 
         case COMPRESS_ALL_BUFFERS: {
           auto buffers = BufFinder::find(l.root_stmt());
-          if (buffers.size() < 0) {
-            break;
-          }
 
           message = "compressAllBuffers(l.root_stmt());\n";
           randomization_helper::printHistory(n_transform, message);