[LLVMdev] Does llvm-lit support type substitution (macro)?

[Reid Kleckner]

You can use the C preprocessor:

// RUN: %clang_cc1 -DTYPE=char %s -fsyntax-only
// RUN: %clang_cc1 -DTYPE=short %s -fsyntax-only
// RUN: %clang_cc1 -DTYPE=unsigned %s -fsyntax-only

void func(TYPE a) {
  a = 3;
}

But, as David suggests, this kind of data-driven testing usually isn't
useful.

On Wed, Sep 10, 2014 at 8:39 AM, David Blaikie <dblaikie at gmail.com> wrote:

> Nope, lit doesn't have anything like that.
>
> Best to keep the tests simple, sometimes to the point of being repetitious.
>
> Do you actually have different codepaths to test for each type?
> On Sep 10, 2014 8:05 AM, "lyh.kernel" <lyh.kernel at gmail.com> wrote:
>
>> Hello all,
>>
>> I am writing test cases which are dedicated to be executed by llvm-lit.
>> Most of my test cases have the same logic but different types. For example:
>>
>> // RUN: %clang_cc1 -fsyntax-only
>> func (int a) {
>>   a = 3;
>> }
>>
>> // RUN: %clang_cc1 -fsyntax-only
>> func (char a) {
>>   a = 3;
>> }
>>
>> // RUN: %clang_cc1 -fsyntax-only
>> func (unsigned a) {
>>   a = 3;
>> }
>>
>> Now I put them in three different test cases but it is hard to maintain.
>> I am wondering whether llvm-lit support writing test cases with macro
>> parameter and a parameter config file:
>>
>> // RUN: %clang_cc1 -fsyntax-only
>> func (TYPE a) {
>>   a = 3;
>> }
>>
>> // TYPE config
>> TYPE = {int, char, unsigned}
>>
>> Many thanks
>>
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>>
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