[flang][nfc] Fix variable names in `FrontendOptions` & `PreprocessorOptions`

As all member variables in `FrontendOptions` and `PreprocessorOptions`
are public, we should be naming them as `variable` rather than
`variable_` [1]. This patch fixes that.

Also, `FrontendOptions` & `PreprocessorOptions` are re-defined as a
structs rather than classes (all fields are meant to be public).

[1]
https://github.com/llvm/llvm-project/blob/main/flang/docs/C%2B%2Bstyle.md#naming

Differential Revision: https://reviews.llvm.org/D107062

1 files changed, 3 insertions, 3 deletions

diff --git a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
index 9c3b13b6..a17b6b5 100644
--- a/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
+++ b/flang/lib/FrontendTool/ExecuteCompilerInvocation.cpp
@@ -24,7 +24,7 @@ namespace Fortran::frontend {
 static std::unique_ptr<FrontendAction> CreateFrontendBaseAction(
     CompilerInstance &ci) {
 
-  ActionKind ak = ci.frontendOpts().programAction_;
+  ActionKind ak = ci.frontendOpts().programAction;
   switch (ak) {
   case InputOutputTest:
     return std::make_unique<InputOutputTestAction>();
@@ -84,7 +84,7 @@ std::unique_ptr<FrontendAction> CreateFrontendAction(CompilerInstance &ci) {
 }
 bool ExecuteCompilerInvocation(CompilerInstance *flang) {
   // Honor -help.
-  if (flang->frontendOpts().showHelp_) {
+  if (flang->frontendOpts().showHelp) {
     clang::driver::getDriverOptTable().printHelp(llvm::outs(),
         "flang-new -fc1 [options] file...", "LLVM 'Flang' Compiler",
         /*Include=*/clang::driver::options::FC1Option,
@@ -94,7 +94,7 @@ bool ExecuteCompilerInvocation(CompilerInstance *flang) {
   }
 
   // Honor -version.
-  if (flang->frontendOpts().showVersion_) {
+  if (flang->frontendOpts().showVersion) {
     llvm::cl::PrintVersionMessage();
     return true;
   }