oidn: Fix build for VS 2017

Backporting this upstream patch:
https://github.com/OpenImageDenoise/mkl-dnn/commit/1e42e6db81e1a5270ecc0191c5385ce7e7d978e9

Fixes #39186.

4 files changed, 49 insertions, 4 deletions

diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
index 597c63e3f8..78cdedbae4 100644
--- a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
+++ b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
@@ -131,7 +131,7 @@ struct rnn_weights_reorder_t : public cpu_primitive_t {
             return status::success;
         }
 
-        format_tag_t itag_;
+        format_tag_t itag_ = mkldnn_format_tag_undef;
 
     private:
         void init_scratchpad() {
diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
index 5177275452..057cc3c4c7 100644
--- a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
+++ b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
@@ -96,9 +96,9 @@ struct simple_concat_t: public cpu_primitive_t {
             return status::success;
         }
 
-        int perm_[MKLDNN_MAX_NDIMS];
-        int iperm_[MKLDNN_MAX_NDIMS];
-        dims_t blocks_;
+        int perm_[MKLDNN_MAX_NDIMS] {};
+        int iperm_[MKLDNN_MAX_NDIMS] {};
+        dims_t blocks_ {};
 
         dim_t nelems_to_concat(const memory_desc_wrapper &data_d) const {
             const int ndims = data_d.ndims();
diff --git a/thirdparty/oidn/godot-changes-c58c5216.patch b/thirdparty/oidn/patches/godot-changes-c58c5216.patch
index 6a54703064..6a54703064 100644
--- a/thirdparty/oidn/godot-changes-c58c5216.patch
+++ b/thirdparty/oidn/patches/godot-changes-c58c5216.patch
diff --git a/thirdparty/oidn/patches/mkl-dnn-fix-vs2017-build.patch b/thirdparty/oidn/patches/mkl-dnn-fix-vs2017-build.patch
new file mode 100644
index 0000000000..50d94ebffa
--- /dev/null
+++ b/thirdparty/oidn/patches/mkl-dnn-fix-vs2017-build.patch
@@ -0,0 +1,45 @@
+Rediffed by @akien-mga to match oidn 1.1.0 source.
+
+From 1e42e6db81e1a5270ecc0191c5385ce7e7d978e9 Mon Sep 17 00:00:00 2001
+From: Jeremy Wong <jmw@netvigator.com>
+Date: Wed, 11 Sep 2019 04:46:53 +0800
+Subject: [PATCH] src: initialize members in some structures to prevent compile
+ errors with VS2017
+
+addresses "error C3615: constexpr function '...' cannot result in a constant expression" with VS2017
+---
+ src/cpu/rnn/rnn_reorders.hpp | 2 +-
+ src/cpu/simple_concat.hpp    | 6 +++---
+ src/cpu/simple_sum.hpp       | 2 +-
+ 3 files changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
+index 597c63e3f8..ae1551390a 100644
+--- a/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
++++ b/thirdparty/oidn/mkl-dnn/src/cpu/rnn/rnn_reorders.hpp
+@@ -131,7 +131,7 @@ struct rnn_weights_reorder_t : public cpu_primitive_t {
+             return status::success;
+         }
+
+-        format_tag_t itag_;
++        format_tag_t itag_ = mkldnn_format_tag_undef;
+
+     private:
+         void init_scratchpad() {
+diff --git a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
+index 5177275452..057cc3c4c7 100644
+--- a/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
++++ b/thirdparty/oidn/mkl-dnn/src/cpu/simple_concat.hpp
+@@ -96,9 +96,9 @@ struct simple_concat_t: public cpu_primitive_t {
+             return status::success;
+         }
+
+-        int perm_[MKLDNN_MAX_NDIMS];
+-        int iperm_[MKLDNN_MAX_NDIMS];
+-        dims_t blocks_;
++        int perm_[MKLDNN_MAX_NDIMS] {};
++        int iperm_[MKLDNN_MAX_NDIMS] {};
++        dims_t blocks_ {};
+
+         dim_t nelems_to_concat(const memory_desc_wrapper &data_d) const {
+             const int ndims = data_d.ndims();