Merge tag 'perf-core-for-mingo-20161205' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

Fixes:

 - Do not show a bogus target address in 'perf annotate' for targetless powerpc
   jump instructions such as 'bctr' (Ravi Bangoria)

 - Fix tools/build race conditions with the fixdep utility (Jiri Olsa)

 - Fix building objtool with clang (Peter Foley)

Infrastructure changes:

- Support linking perf with clang and LLVM libraries, initially statically, but
  this limitation will be lifted and shared libraries, when available, will
  be preferred to the static build, that should, as with other features, be
  enabled explicitly (Wang Nan)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/tools/perf/util/c++/clang-test.cpp b/tools/perf/util/c++/clang-test.cpp
new file mode 100644
index 000000000000..9b11e8c82798
--- /dev/null
+++ b/tools/perf/util/c++/clang-test.cpp
@@ -0,0 +1,62 @@
+#include "clang.h"
+#include "clang-c.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/LLVMContext.h"
+
+#include <util-cxx.h>
+#include <tests/llvm.h>
+#include <string>
+
+class perf_clang_scope {
+public:
+	explicit perf_clang_scope() {perf_clang__init();}
+	~perf_clang_scope() {perf_clang__cleanup();}
+};
+
+static std::unique_ptr<llvm::Module>
+__test__clang_to_IR(void)
+{
+	unsigned int kernel_version;
+
+	if (fetch_kernel_version(&kernel_version, NULL, 0))
+		return std::unique_ptr<llvm::Module>(nullptr);
+
+	std::string cflag_kver("-DLINUX_VERSION_CODE=" +
+				std::to_string(kernel_version));
+
+	std::unique_ptr<llvm::Module> M =
+		perf::getModuleFromSource({cflag_kver.c_str()},
+					  "perf-test.c",
+					  test_llvm__bpf_base_prog);
+	return M;
+}
+
+extern "C" {
+int test__clang_to_IR(void)
+{
+	perf_clang_scope _scope;
+
+	auto M = __test__clang_to_IR();
+	if (!M)
+		return -1;
+	for (llvm::Function& F : *M)
+		if (F.getName() == "bpf_func__SyS_epoll_wait")
+			return 0;
+	return -1;
+}
+
+int test__clang_to_obj(void)
+{
+	perf_clang_scope _scope;
+
+	auto M = __test__clang_to_IR();
+	if (!M)
+		return -1;
+
+	auto Buffer = perf::getBPFObjectFromModule(&*M);
+	if (!Buffer)
+		return -1;
+	return 0;
+}
+
+}