From 50df3a7389514f2500fbd11772e168ba7fd83769 Mon Sep 17 00:00:00 2001
From: Tomasz Sobczyk <tomasz.sobczyk1997@gmail.com>
Date: Mon, 21 Dec 2020 22:20:39 +0100
Subject: [PATCH] fix annoying warning

---
 src/nnue/trainer/trainer_input_slice.h | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/nnue/trainer/trainer_input_slice.h b/src/nnue/trainer/trainer_input_slice.h
index 62a761a7..ff1265dc 100644
--- a/src/nnue/trainer/trainer_input_slice.h
+++ b/src/nnue/trainer/trainer_input_slice.h
@@ -323,17 +323,23 @@ namespace Eval::NNUE {
                 const IndexType output_offset = kOutputDimensions * b;
 
                 IndexType i = 0;
-                for (; i < Offset; ++i) {
-                    gradients_[input_offset + i] = static_cast<LearnFloatType>(0.0);
+                if constexpr (Offset > 0)
+                {
+                    for (; i < Offset; ++i) {
+                        gradients_[input_offset + i] = static_cast<LearnFloatType>(0.0);
+                    }
                 }
 
                 for (; i < Offset + kOutputDimensions; ++i) {
                     gradients_[input_offset + i] = gradients[output_offset + i - Offset];
                 }
 
-                for (; i < kInputDimensions; ++i)
+                if constexpr (Offset + kOutputDimensions < kInputDimensions)
                 {
-                    gradients_[input_offset + i] = static_cast<LearnFloatType>(0.0);
+                    for (; i < kInputDimensions; ++i)
+                    {
+                        gradients_[input_offset + i] = static_cast<LearnFloatType>(0.0);
+                    }
                 }
             }