00b86691c7
Add basic clang support in clang.cpp and test__clang() testcase. The first testcase checks if builtin clang is able to generate LLVM IR. tests/clang.c is a proxy. Real testcase resides in utils/c++/clang-test.cpp in c++ and exports C interface to perf test subsystem. Test result: $ perf test -v clang 51: builtin clang support : 51.1: Test builtin clang compile C source to IR : --- start --- test child forked, pid 13215 test child finished with 0 ---- end ---- Test builtin clang support subtest 0: Ok Committer note: Make sure you've enabled CLANG and LLVM builtin support by setting the LIBCLANGLLVM variable on the make command line, e.g.: make LIBCLANGLLVM=1 O=/tmp/build/perf -C tools/perf install-bin Otherwise you'll get this when trying to do the 'perf test' call above: # perf test clang 51: builtin clang support : Skip (not compiled in) # Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexei Starovoitov <ast@fb.com> Cc: He Kuang <hekuang@huawei.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Joe Stringer <joe@ovn.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/20161126070354.141764-11-wangnan0@huawei.com [ Removed "Test" from descriptions, redundant and already removed from all the other entries ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
31 lines
542 B
C++
31 lines
542 B
C++
#include "clang.h"
|
|
#include "clang-c.h"
|
|
#include "llvm/IR/Function.h"
|
|
#include "llvm/IR/LLVMContext.h"
|
|
|
|
class perf_clang_scope {
|
|
public:
|
|
explicit perf_clang_scope() {perf_clang__init();}
|
|
~perf_clang_scope() {perf_clang__cleanup();}
|
|
};
|
|
|
|
extern "C" {
|
|
|
|
int test__clang_to_IR(void)
|
|
{
|
|
perf_clang_scope _scope;
|
|
|
|
std::unique_ptr<llvm::Module> M =
|
|
perf::getModuleFromSource("perf-test.c",
|
|
"int myfunc(void) {return 1;}");
|
|
|
|
if (!M)
|
|
return -1;
|
|
|
|
for (llvm::Function& F : *M)
|
|
if (F.getName() == "myfunc")
|
|
return 0;
|
|
return -1;
|
|
}
|
|
|
|
}
|