From e41e2a110373a251cd0664f077ada6f344e5c8fd Mon Sep 17 00:00:00 2001
From: Hendrik Brucker <hendrik.brucker@mail.de>
Date: Sat, 30 Apr 2022 16:43:16 +0200
Subject: [PATCH] Fix GCC warning with -Waggressive-loop-optimizations due to
 overflow

---
 thirdparty/noise/FastNoiseLite.h             |  9 ++++++++
 thirdparty/noise/patches/FastNoiseLite.patch | 23 ++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/thirdparty/noise/FastNoiseLite.h b/thirdparty/noise/FastNoiseLite.h
index 8015bf636a4..a213f0888e3 100644
--- a/thirdparty/noise/FastNoiseLite.h
+++ b/thirdparty/noise/FastNoiseLite.h
@@ -1611,6 +1611,12 @@ private:
         }
     }
 
+// GCC raises warnings when integer overflows occur, which are needed for hashing here.
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Waggressive-loop-optimizations"
+#endif
+
     template <typename FNfloat>
     float SingleCellular(int seed, FNfloat x, FNfloat y, FNfloat z) const
     {
@@ -1765,6 +1771,9 @@ private:
         }
     }
 
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
 
     // Perlin Noise
 
diff --git a/thirdparty/noise/patches/FastNoiseLite.patch b/thirdparty/noise/patches/FastNoiseLite.patch
index 41ec943077b..3c835c7b062 100644
--- a/thirdparty/noise/patches/FastNoiseLite.patch
+++ b/thirdparty/noise/patches/FastNoiseLite.patch
@@ -430,3 +430,26 @@
      {
          x *= frequency;
          y *= frequency;
+@@ -1611,6 +1611,12 @@ private:
+         }
+     }
+ 
++// GCC raises warnings when integer overflows occur, which are needed for hashing here.
++#if defined(__GNUC__) && !defined(__clang__)
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Waggressive-loop-optimizations"
++#endif
++
+     template <typename FNfloat>
+     float SingleCellular(int seed, FNfloat x, FNfloat y, FNfloat z) const
+     {
+@@ -1765,6 +1771,9 @@ private:
+         }
+     }
+ 
++#if defined(__GNUC__) && !defined(__clang__)
++#pragma GCC diagnostic pop
++#endif
+ 
+     // Perlin Noise
+ 
\ No newline at end of file