From 84ac01f4ffc83717bc81526e8a65826d6328226b Mon Sep 17 00:00:00 2001
From: Even Rouault <even.rouault@spatialys.com>
Date: Tue, 19 Mar 2024 21:40:16 +0100
Subject: [PATCH] Fix compiler crash on gcore/overview.cpp with ICC 2024.0.2.29
 (fixes #9508)

---
 gcore/overview.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gcore/overview.cpp b/gcore/overview.cpp
index de44132f1671..40fa0933c72c 100644
--- a/gcore/overview.cpp
+++ b/gcore/overview.cpp
@@ -2582,6 +2582,10 @@ GDALResampleConvolutionHorizontal(const T *pChunk, const double *padfWeights,
     double dfVal1 = 0.0;
     double dfVal2 = 0.0;
     int i = 0;  // Used after for.
+    // Intel Compiler 2024.0.2.29 (maybe other versions?) crashes on this
+    // manually (untypical) unrolled loop in -O2 and -O3:
+    // https://github.com/OSGeo/gdal/issues/9508
+#if !defined(__INTEL_CLANG_COMPILER)
     for (; i + 3 < nSrcPixelCount; i += 4)
     {
         dfVal1 += pChunk[i] * padfWeights[i];
@@ -2589,6 +2593,7 @@ GDALResampleConvolutionHorizontal(const T *pChunk, const double *padfWeights,
         dfVal2 += pChunk[i + 2] * padfWeights[i + 2];
         dfVal2 += pChunk[i + 3] * padfWeights[i + 3];
     }
+#endif
     for (; i < nSrcPixelCount; ++i)
     {
         dfVal1 += pChunk[i] * padfWeights[i];