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llvm-project/flang/test/Parser/pp-dir-comments.f90

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[flang][driver] Add options for unparsing This patch adds the following compiler frontend driver options: * -fdebug-unparse (f18 spelling: -funparse) * -fdebug-unparse-with-symbols (f18 spelling: -funparse-with-symbols) The new driver will only accept the new spelling. `f18` will accept both the original and the new spelling. A new base class for frontend actions is added: `PrescanAndSemaAction`. This is added to reduce code duplication that otherwise these new options would lead to. Implementation from * `ParseSyntaxOnlyAction::ExecutionAction` is moved to: * `PrescanAndSemaAction::BeginSourceFileAction` This implementation is now shared between: * PrescanAndSemaAction * ParseSyntaxOnlyAction * DebugUnparseAction * DebugUnparseWithSymbolsAction All tests that don't require other yet unimplemented options are updated. This way `flang-new -fc1` is used instead of `f18` when `FLANG_BUILD_NEW_DRIVER` is set to `On`. In order to facilitate this, `%flang_fc1` is added in the LIT configuration (lit.cfg.py). `asFortran` from f18.cpp is duplicated as `getBasicAsFortran` in FrontendOptions.cpp. At this stage it's hard to find a good place to share this method. I suggest that we revisit this once a switch from `f18` to `flang-new` is complete. Differential Revision: https://reviews.llvm.org/D96483
2021-02-04 19:14:57 +08:00
! RUN: %flang_fc1 -fdebug-unparse %s 2>&1 | FileCheck %s
[flang] Allow ! and // comments after some preprocessing directives Old-style C /*comments*/ are omitted from preprocessor directive token sequences by the prescanner, but line-ending C++ and Fortran free-form comments are not since their handling might depend on the directive. Add code to skip these line-ending comments as appropriate in place of existing code that just skipped blanks. Reviewed By: sscalpone Differential Revision: https://reviews.llvm.org/D84061
2020-07-18 02:21:08 +08:00
#define pmk
#ifdef pmk // comment
! CHECK: t1
real t1
#endif // comment
#undef pmk ! comment
#ifndef pmk ! comment
! CHECK: t2
real t2
#endif // comment
#if 0 /* C comment */ + 0
! CHECK-NOT: misinterpreted
# error misinterpreted #if
#else // comment
! CHECK: END PROGRAM
end
#endif ! comment