[mlir][OpenMP][NFC] Fix gcc 14 warning (llvm#151941)

tblah · krishna2803 · commit d60ca88286b1 · 2025-08-12T18:07:37.000+05:30
GCC couldn't tell that the enum is checked exhaustively and so was
warning about there being no return on this path from the function.
diff --git a/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp b/mlir/lib/Target/LLVMIR/Dialect/OpenMP/OpenMPToLLVMIRTranslation.cpp
@@ -3391,6 +3391,7 @@ static llvm::omp::Directive convertCancellationConstructType(
   case omp::ClauseCancellationConstructType::Taskgroup:
     return llvm::omp::Directive::OMPD_taskgroup;
   }
+  llvm_unreachable("Unhandled cancellation construct type");
 }
 
 static LogicalResult

Original file line number	Diff line number	Diff line change
`@@ -3391,6 +3391,7 @@ static llvm::omp::Directive convertCancellationConstructType(`
`3391`	`3391`	`case omp::ClauseCancellationConstructType::Taskgroup:`
`3392`	`3392`	`return llvm::omp::Directive::OMPD_taskgroup;`
`3393`	`3393`	`}`
	`3394`	`+ llvm_unreachable("Unhandled cancellation construct type");`
`3394`	`3395`	`}`
`3395`	`3396`
`3396`	`3397`	`static LogicalResult`