[clang] [llvm] [OpenMP]Initial parsing/sema support for target_device selector set (PR #118471)

[Alexey Bataev via llvm-commits]

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@@ -15629,6 +15629,34 @@ ExprResult SemaOpenMP::VerifyPositiveIntegerConstantInClause(
   return ICE;
 }
 
+void SemaOpenMP::ActOnOpenMPDeviceNum(Expr *DeviceNumExpr) {
+  llvm::APSInt Result;
+  Expr::EvalResult EvalResult;
+  // Strip implicit casts from the expression
+  DeviceNumExpr = DeviceNumExpr->IgnoreImpCasts();
+  // Evaluate the expression to an integer value
+  if (DeviceNumExpr->EvaluateAsInt(EvalResult, SemaRef.Context)) {
+    // The device expression must evaluate to a non-negative integer value.
+    Result = EvalResult.Val.getInt();
+    if (Result.isNonNegative()) {
+      OMPContext::DeviceNum = Result.getSExtValue();
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alexey-bataev wrote:

`Result.getZExtValue()], since it is non-negative?

https://github.com/llvm/llvm-project/pull/118471