v4.19.13 snapshot.
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
new file mode 100644
index 0000000..a039f93
--- /dev/null
+++ b/tools/perf/tests/llvm.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <bpf/libbpf.h>
+#include <util/llvm-utils.h>
+#include <util/cache.h>
+#include "llvm.h"
+#include "tests.h"
+#include "debug.h"
+#include "util.h"
+
+#ifdef HAVE_LIBBPF_SUPPORT
+static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
+{
+ struct bpf_object *obj;
+
+ obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
+ if (libbpf_get_error(obj))
+ return TEST_FAIL;
+ bpf_object__close(obj);
+ return TEST_OK;
+}
+#else
+static int test__bpf_parsing(void *obj_buf __maybe_unused,
+ size_t obj_buf_sz __maybe_unused)
+{
+ pr_debug("Skip bpf parsing\n");
+ return TEST_OK;
+}
+#endif
+
+static struct {
+ const char *source;
+ const char *desc;
+ bool should_load_fail;
+} bpf_source_table[__LLVM_TESTCASE_MAX] = {
+ [LLVM_TESTCASE_BASE] = {
+ .source = test_llvm__bpf_base_prog,
+ .desc = "Basic BPF llvm compile",
+ },
+ [LLVM_TESTCASE_KBUILD] = {
+ .source = test_llvm__bpf_test_kbuild_prog,
+ .desc = "kbuild searching",
+ },
+ [LLVM_TESTCASE_BPF_PROLOGUE] = {
+ .source = test_llvm__bpf_test_prologue_prog,
+ .desc = "Compile source for BPF prologue generation",
+ },
+ [LLVM_TESTCASE_BPF_RELOCATION] = {
+ .source = test_llvm__bpf_test_relocation,
+ .desc = "Compile source for BPF relocation",
+ .should_load_fail = true,
+ },
+};
+
+int
+test_llvm__fetch_bpf_obj(void **p_obj_buf,
+ size_t *p_obj_buf_sz,
+ enum test_llvm__testcase idx,
+ bool force,
+ bool *should_load_fail)
+{
+ const char *source;
+ const char *desc;
+ const char *tmpl_old, *clang_opt_old;
+ char *tmpl_new = NULL, *clang_opt_new = NULL;
+ int err, old_verbose, ret = TEST_FAIL;
+
+ if (idx >= __LLVM_TESTCASE_MAX)
+ return TEST_FAIL;
+
+ source = bpf_source_table[idx].source;
+ desc = bpf_source_table[idx].desc;
+ if (should_load_fail)
+ *should_load_fail = bpf_source_table[idx].should_load_fail;
+
+ /*
+ * Skip this test if user's .perfconfig doesn't set [llvm] section
+ * and clang is not found in $PATH, and this is not perf test -v
+ */
+ if (!force && (verbose <= 0 &&
+ !llvm_param.user_set_param &&
+ llvm__search_clang())) {
+ pr_debug("No clang and no verbosive, skip this test\n");
+ return TEST_SKIP;
+ }
+
+ /*
+ * llvm is verbosity when error. Suppress all error output if
+ * not 'perf test -v'.
+ */
+ old_verbose = verbose;
+ if (verbose == 0)
+ verbose = -1;
+
+ *p_obj_buf = NULL;
+ *p_obj_buf_sz = 0;
+
+ if (!llvm_param.clang_bpf_cmd_template)
+ goto out;
+
+ if (!llvm_param.clang_opt)
+ llvm_param.clang_opt = strdup("");
+
+ err = asprintf(&tmpl_new, "echo '%s' | %s%s", source,
+ llvm_param.clang_bpf_cmd_template,
+ old_verbose ? "" : " 2>/dev/null");
+ if (err < 0)
+ goto out;
+ err = asprintf(&clang_opt_new, "-xc %s", llvm_param.clang_opt);
+ if (err < 0)
+ goto out;
+
+ tmpl_old = llvm_param.clang_bpf_cmd_template;
+ llvm_param.clang_bpf_cmd_template = tmpl_new;
+ clang_opt_old = llvm_param.clang_opt;
+ llvm_param.clang_opt = clang_opt_new;
+
+ err = llvm__compile_bpf("-", p_obj_buf, p_obj_buf_sz);
+
+ llvm_param.clang_bpf_cmd_template = tmpl_old;
+ llvm_param.clang_opt = clang_opt_old;
+
+ verbose = old_verbose;
+ if (err)
+ goto out;
+
+ ret = TEST_OK;
+out:
+ free(tmpl_new);
+ free(clang_opt_new);
+ if (ret != TEST_OK)
+ pr_debug("Failed to compile test case: '%s'\n", desc);
+ return ret;
+}
+
+int test__llvm(struct test *test __maybe_unused, int subtest)
+{
+ int ret;
+ void *obj_buf = NULL;
+ size_t obj_buf_sz = 0;
+ bool should_load_fail = false;
+
+ if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
+ return TEST_FAIL;
+
+ ret = test_llvm__fetch_bpf_obj(&obj_buf, &obj_buf_sz,
+ subtest, false, &should_load_fail);
+
+ if (ret == TEST_OK && !should_load_fail) {
+ ret = test__bpf_parsing(obj_buf, obj_buf_sz);
+ if (ret != TEST_OK) {
+ pr_debug("Failed to parse test case '%s'\n",
+ bpf_source_table[subtest].desc);
+ }
+ }
+ free(obj_buf);
+
+ return ret;
+}
+
+int test__llvm_subtest_get_nr(void)
+{
+ return __LLVM_TESTCASE_MAX;
+}
+
+const char *test__llvm_subtest_get_desc(int subtest)
+{
+ if ((subtest < 0) || (subtest >= __LLVM_TESTCASE_MAX))
+ return NULL;
+
+ return bpf_source_table[subtest].desc;
+}