[clang] [llvm] [Clang][OpenMP] Non-contiguous strided update (PR #144635)

[Alexey Bataev via llvm-commits]

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@@ -7378,7 +7378,35 @@ class MappableExprsHandler {
     // dimension.
     uint64_t DimSize = 1;
 
-    bool IsNonContiguous = CombinedInfo.NonContigInfo.IsNonContiguous;
+    // Detects non-contiguous updates due to strided accesses.
+    // Sets the 'IsNonContiguous' flag so that the 'MapType' bits are set
+    // correctly when generating information to be passed to the runtime. The
+    // flag is set to true if any array section has a stride not equal to 1, or
+    // if the stride is not a constant expression (conservatively assumed
+    // non-contiguous).
+    bool IsNonContiguous = [&]() -> bool {
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alexey-bataev wrote:

`bool IsNonContiguous = CombinedInfo.NonContigInfo.IsNonContiguous || ...` to avoid doing some extra work if CombinedInfo.NonContigInfo.IsNonContiguous is already set

https://github.com/llvm/llvm-project/pull/144635