[cfe-dev] About Clang Test

[Reid Kleckner]

No, there are no end-to-end execution tests that live in the clang or LLVM
repositories and are expected to run before check-in. The IR FileCheck
tests give us enough faith that everything is working properly.

Fortunately, it is *very* easy to self-host clang or build any other
software you have access to and run its tests.

On Tue, Jan 20, 2015 at 8:10 PM, Nothing <bluechristlove at 163.com> wrote:

> Richard Smith,Thanks.
> But in my opinion, the compiler should have such test for running behavior
> for stronger, more careful test, especially some code has running
> behavior(such as virtual function, exception and so on). So, if clang
> doesn't have this end-to-end test, how about LLVM?
>
> Best Regards
>
> Wu Zhao
>
>
>
>
>
> At 2015-01-21 11:28:48, "Richard Smith" <richard at metafoo.co.uk> wrote:
> >On Tue, Jan 20, 2015 at 6:49 PM, Nothing <bluechristlove at 163.com> wrote:
> >> Hi everyone!
> >>     I'm trying to write a translator to translate LLVM IR to another
> >> IR(named 'X'). That's to say I use the result of Clang but do not use LLVM
> >> Backend. You can think I use Clang + Another IR('X') + Another Backend(Can
> >> recognize 'X'). Here, I want to know where is the test of Clang?
> >>
> >>    First of all, I want to list the information I have known so far.
> >>    1. clang-test repository in the LLVM
> >>        The standalone repository I found yesterday. I found many test files
> >> in this folder but I didn't know whether it is the all test files of Clang,
> >> because I found that these are mainly from gcc test suite, especially I
> >> didn't know whether it contained C++11, C++1y test cases or not.
> >>
> >>   2. tests in the Clang repository
> >>      In the Clang repository, there is also one tests folder which has
> >> 'SemaCXX', 'SemaTemplate' and so on. But I find that it is tested by verify
> >> files. I think I need the running result(Because I use Clang, if  I compile
> >> it, it can compile perfectly). For example:
> >>
> >> // a.cc
> >>
> >> int func() {
> >>      int a = 1;
> >>      int b = 3;
> >>      return a + b;
> >> }
> >> int main() {
> >>     std::cout << func();
> >>     return 0;
> >> }
> >> if I run a.cc, the result will be 4. if I can have one 'expected_result'
> >> file, I can know whether it is the correct result or not.
> >>
> >> The problem is that I do not whether Clang has this kind test suite, i.e.
> >> one test file(such as a.cc), one expected result file(such as a.expected).
> >
> >The clang repository itself does not contain such end-to-end tests (we
> >prefer to test that correct diagnostics or IR are generated for our
> >pre-checkin unit tests), but we have some in the test-suite
> >repository, see:
> >
> >http://llvm.org/svn/llvm-project/test-suite/
> >http://llvm.org/docs/TestingGuide.html#test-suite
>
>
>
>
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