[LLVMdev] Need advise on adding tests - Was: Re: ARM MC .s status?

[Daniel Dunbar]

We do tend to focus on the integration test style, but using our own
tools which allow decomposing commands. Take a look at the tests in
the tests/MC directory for examples of MC tests. Most tests are pretty
lightweight, definitely much much lighter than .cpp -> .o.

As far as ARM / MC goes, we are still just in the preliminary stages
of getting things working. We have some instruction parsing support,
still need substantial work on instruction matching, and still need
substantial work in the encoder and backend. We also still need
substantial work on the codegen side to MC'ize things.

 - Daniel

On Thu, Sep 16, 2010 at 5:05 PM, Jason Kim <jasonwkim at google.com> wrote:
> Hi everyone,
>
> I am trying to get up to speed on the MC object file emission for ARM,
> the first cut being for ELF, and the testing required for that.
>
> Obviously, we want the tests for the .o emission to ultimately test
> the entire .ll -> many llvm passes -> .bc -> .o, but as a first cut,
> my instinct tells me that a simple .cpp unit tests that directly
> invokes the MC code to generate (and self-check) the ARM ELF might be
> the way to go, but I am wondering where the best place for something
> like this is? I.e. From what I can tell, in the test-suite, even
> single file .c files are (according to the readme at least) are run as
> integration tests that compare llvm .bc / lli output to th eoutput of
> a native compile ...
>
> The testing document in llvm.org only talk about pretty heavy weight
> integration tests (Tcl + FileCheck, .cpp -> (many compilers  ...)
> which is fine, but, but as a sanity check, I can't seem to find an
> example of a test.cpp file that invokes a certain subset of LLVM API,
> and self-checks the result - Or is the heavyweight "compile a .cpp
> file and cross check LLVM-clang's output to gcc" the only way
> something like this supported?
>
> Thanks,
>
> -Jason.
> -jason
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