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

[Alexey Bataev via cfe-commits]

================
@@ -7378,7 +7378,31 @@ 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 {
+      for (const auto &Component : Components) {
+        const auto *OASE =
+            dyn_cast<ArraySectionExpr>(Component.getAssociatedExpression());
+        if (OASE) {
----------------
alexey-bataev wrote:

```
if (!OASE)
  continue
```

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