use irange for loops 6 (pytorch#66742)

Summary:
Pull Request resolved: pytorch#66742

Modified loops in files under fbsource/fbcode/caffe2/ from the format

`for(TYPE var=x0;var<x_max;x++)`

to the format

`for(const auto var: irange(xmax))`

This was achieved by running r-barnes's loop upgrader script (D28874212) with some modification to exclude all files under /torch/jit and a number of reversions or unused variable suppression warnings added by hand.

Test Plan: Sandcastle

Reviewed By: malfet

Differential Revision: D31705366

fbshipit-source-id: be58222426c192406a7f93c21582c3f6f2082401

Author: r-barnes

caffe2/ideep/operators/conv_pool_base_op.h

@@ -53,7 +53,7 @@ class IDEEPConvPoolOpBase : public ConvPoolOpBase<IDEEPContext> {
 
   bool RunOnDevice() override {
     if (!global_pooling_) {
-      for (int dim = 0; dim < kernel_.size(); ++dim) {
+      for (const auto dim : c10::irange(kernel_.size())) {
         CAFFE_ENFORCE_GT(kernel_[dim], 0);
       }
     }

caffe2/ideep/operators/conv_transpose_unpool_base_op.h

@@ -109,7 +109,7 @@ class IDEEPConvTransposeUnpoolBase : public IDEEPOperator {
       CAFFE_ENFORCE_EQ(pads_.size(), 2 * kernel_.size());
     }
 
-    for (int dim = 0; dim < kernel_.size(); ++dim) {
+    for (const auto dim : c10::irange(kernel_.size())) {
       CAFFE_ENFORCE_GT(kernel_[dim], 0);
       CAFFE_ENFORCE_GT(stride_[dim], 0);
       CAFFE_ENFORCE_GE(adj_[dim], 0);
@@ -143,7 +143,7 @@ class IDEEPConvTransposeUnpoolBase : public IDEEPOperator {
     auto input_dims = input.get_dims();
     itensor::dims dims;
     dims.assign(input_dims.begin() + 2, input_dims.end());
-    for (int dim = 0; dim < dims.size(); ++dim) {
+    for (const auto dim : c10::irange(dims.size())) {
       int dim_size = 0;
       ComputeSizeAndPad(
           dims[dim],

caffe2/ideep/operators/operator_fallback_ideep.h

@@ -52,7 +52,7 @@ class IDEEPFallbackOp final : public IDEEPOperator {
     // Create output blobs in parent workspace,
     // then forward output blobs to local workspace.
     std::unordered_map<string, string> forwarded_output_blobs;
-    for (int i = 0; i < base_def_.output_size(); i++) {
+    for (const auto i : c10::irange(base_def_.output_size())) {
       // For in-place case, the in/output tensor for local_ws must be
       // re-created, instead of forwarding from current workspace.
       string parent_name(base_def_.output(i));
@@ -81,7 +81,7 @@ class IDEEPFallbackOp final : public IDEEPOperator {
   }
 
   bool RunOnDevice() override {
-    for (int i = 0; i < InputSize(); ++i) {
+    for (const auto i : c10::irange(InputSize())) {
       if (InputIsType<itensor>(i)
           && (Input(i).has_scale()
             || Input(i).get_data_type() == idtype::f32)) {
@@ -128,7 +128,7 @@ class IDEEPFallbackOp final : public IDEEPOperator {
       return false;
     }
 
-    for (int i = 0; i < OutputSize(); ++i) {
+    for (const auto i : c10::irange(OutputSize())) {
       if (SkipOutputCopy::Contains(i)) {
         VLOG(1) << "Copy output: index " << i << " skipped.";
         continue;

caffe2/ideep/utils/ideep_context.h

@@ -83,7 +83,7 @@ class IDEEPContext final : public BaseContext {
           static_cast<const void*>(src),
           static_cast<void*>(dst));
     } else {
-      for (size_t i = 0; i < n; ++i) {
+      for (const auto i : c10::irange(n)) {
         dst[i] = src[i];
       }
     }