[clang] [OpenMP] Add assertion for 'factor' width mismatch in 'unroll partial' (PR #139986)

[ALBIN BABU VARGHESE via cfe-commits]

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@@ -14924,8 +14924,24 @@ StmtResult SemaOpenMP::ActOnOpenMPUnrollDirective(ArrayRef<OMPClause *> Clauses,
   SourceLocation FactorLoc;
   if (Expr *FactorVal = PartialClause->getFactor();
       FactorVal && !FactorVal->containsErrors()) {
+    if (!VerifyPositiveIntegerConstantInClause(FactorVal, OMPC_partial,
+                                               /*StrictlyPositive=*/true,
+                                               /*SuppressExprDiags=*/false)
+             .isUsable()) {
+      return StmtError();
+    }
+    // Checking if Itertor Variable Type can hold the Factor Width
+    if (FactorVal->getIntegerConstantExpr(Context)->getBitWidth() >
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albus-droid wrote:

I created two local variables `FactorValWidth` and `IteratorVWidth` to use in both places.

https://github.com/llvm/llvm-project/pull/139986