feat(ascendc): add Huawei Ascend C toolchain support

Add toolchain, language, rules, and compiler modules for the
bisheng compiler driver from CANN (Compute Architecture for
Neural Networks) toolkit. Supports .asc (Ascend C kernel) and
.aicpu (AI-CPU operator) source kinds with binary/static/shared
target types.

- Toolchain: SDK auto-detection via ASCEND_HOME_PATH env or --sdk
- Compiler: bisheng module inherits from clang, adds add_sourceflags
  for explicit sourcekind overrides
- Rules: ascendc.env (default C++17), npuarchs (--npu-arch), build
- Language: check_main detection, add_ascnpuarchs API
- Tests: unit tests for check_main, project tests for libs/mixed

Fixes #7506

1 files changed, 34 insertions, 0 deletions

diff --git a/tests/modules/language/ascendc/test.lua b/tests/modules/language/ascendc/test.lua
new file mode 100644
index 000000000..507bff9ec
--- /dev/null
+++ b/tests/modules/language/ascendc/test.lua
@@ -0,0 +1,34 @@
+import("core.language.language")
+
+function _write_asc_file(name, source)
+    local sourcefile = os.tmpfile(name) .. ".asc"
+    io.writefile(sourcefile, source)
+    return sourcefile
+end
+
+function test_check_main(t)
+    local instance = language.load("ascendc")
+    t:require(instance)
+
+    local check_main = instance:get("check_main")
+    t:require(check_main)
+
+    local mainfile = _write_asc_file("ascendc_check_main", [[
+#include "acl/acl.h"
+
+int32_t main(int argc, char const *argv[]) {
+    return 0;
+}
+]])
+    t:are_equal(check_main(mainfile), true)
+
+    local commentfile = _write_asc_file("ascendc_check_main_comment", [[
+// int main() { return 0; }
+/*
+int main() { return 1; }
+*/
+__global__ __vector__ void kernel() {
+}
+]])
+    t:are_equal(check_main(commentfile), false)
+end