[mlir][lldb] Fix several gcc warnings in mlir and lldb

These warnings are raised when compiling with gcc due to either having too few or too many commas, or in the case of lldb, the possibility of a nullptr.

Reviewed By: mehdi_amini

Differential Revision: https://reviews.llvm.org/D97586

Author: sstamenova

lldb/source/Commands/CommandObjectTrace.cpp

@@ -116,7 +116,7 @@ class CommandObjectTraceLoad : public CommandObjectParsed {
             Trace::FindPlugin(GetDebugger(), *session_file,
                               json_file.GetDirectory().AsCString())) {
       lldb::TraceSP trace_sp = traceOrErr.get();
-      if (m_options.m_verbose)
+      if (m_options.m_verbose && trace_sp)
         result.AppendMessageWithFormat("loading trace with plugin %s\n",
                                        trace_sp->GetPluginName().AsCString());
     } else

mlir/lib/Conversion/VectorToSPIRV/VectorToSPIRV.cpp

@@ -27,7 +27,7 @@ using namespace mlir;
 /// attribute.
 static uint64_t getFirstIntValue(ArrayAttr attr) {
   return (*attr.getAsValueRange<IntegerAttr>().begin()).getZExtValue();
-};
+}
 
 namespace {
 

mlir/tools/mlir-linalg-ods-gen/mlir-linalg-ods-yaml-gen.cpp

@@ -129,12 +129,12 @@ struct LinalgOpConfig {
 // Mapping traits.
 //===----------------------------------------------------------------------===//
 
-LLVM_YAML_IS_SEQUENCE_VECTOR(LinalgTensorDef);
-LLVM_YAML_IS_SEQUENCE_VECTOR(SerializedAffineMap);
-LLVM_YAML_IS_SEQUENCE_VECTOR(LinalgIteratorTypeDef);
-LLVM_YAML_IS_SEQUENCE_VECTOR(ScalarAssign);
-LLVM_YAML_IS_SEQUENCE_VECTOR(ScalarExpression);
-LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(LinalgOpConfig);
+LLVM_YAML_IS_SEQUENCE_VECTOR(LinalgTensorDef)
+LLVM_YAML_IS_SEQUENCE_VECTOR(SerializedAffineMap)
+LLVM_YAML_IS_SEQUENCE_VECTOR(LinalgIteratorTypeDef)
+LLVM_YAML_IS_SEQUENCE_VECTOR(ScalarAssign)
+LLVM_YAML_IS_SEQUENCE_VECTOR(ScalarExpression)
+LLVM_YAML_IS_DOCUMENT_LIST_VECTOR(LinalgOpConfig)
 
 namespace llvm {
 namespace yaml {