[TEST] Move llvm import test away from minimum test (apache#9171)

* [TEST] Move llvm import test away from minimum test

The llvm import relies on the same system clang and llvm version and
may be tricky to get right on all platforms.
Given this is an advanced feature, and there has been some problems
in windows(could relates to clang version update).
This PR moves away from minimum tests.

* Update test_minimal_target_codegen_llvm.py

* Update test_target_codegen_llvm.py

Co-authored-by: Junru Shao <junrushao1994@gmail.com>

tests/python/all-platform-minimal-test/test_minimal_target_codegen_llvm.py

@@ -20,7 +20,7 @@
 import tvm.testing
 from tvm import te
 from tvm import topi
-from tvm.contrib import utils, clang
+from tvm.contrib import utils
 import numpy as np
 import ctypes
 import math
@@ -65,43 +65,3 @@ def check_llvm():
         tvm.testing.assert_allclose(c.numpy(), a.numpy() + b.numpy())
 
     check_llvm()
-
-
-@tvm.testing.requires_llvm
-def test_llvm_import():
-    """all-platform-minimal-test: check shell dependent clang behavior."""
-    # extern "C" is necessary to get the correct signature
-    cc_code = """
-    extern "C" float my_add(float x, float y) {
-      return x + y;
-    }
-    """
-    n = 10
-    A = te.placeholder((n,), name="A")
-    B = te.compute(
-        (n,), lambda *i: tvm.tir.call_pure_extern("float32", "my_add", A(*i), 1.0), name="B"
-    )
-
-    def check_llvm(use_file):
-        if not clang.find_clang(required=False):
-            print("skip because clang is not available")
-            return
-        temp = utils.tempdir()
-        ll_path = temp.relpath("temp.ll")
-        ll_code = clang.create_llvm(cc_code, output=ll_path)
-        s = te.create_schedule(B.op)
-        if use_file:
-            s[B].pragma(s[B].op.axis[0], "import_llvm", ll_path)
-        else:
-            s[B].pragma(s[B].op.axis[0], "import_llvm", ll_code)
-        # BUILD and invoke the kernel.
-        f = tvm.build(s, [A, B], "llvm")
-        dev = tvm.cpu(0)
-        # launch the kernel.
-        a = tvm.nd.array(np.random.uniform(size=n).astype(A.dtype), dev)
-        b = tvm.nd.array(np.random.uniform(size=n).astype(B.dtype), dev)
-        f(a, b)
-        tvm.testing.assert_allclose(b.numpy(), a.numpy() + 1.0)
-
-    check_llvm(use_file=True)
-    check_llvm(use_file=False)

tests/python/unittest/test_target_codegen_llvm.py

@@ -23,7 +23,7 @@
 import tvm.testing
 from tvm import te
 from tvm import topi
-from tvm.contrib import utils
+from tvm.contrib import utils, clang
 import numpy as np
 import ctypes
 import math
@@ -845,5 +845,45 @@ def make_call_extern(caller, callee):
     assert matches == sorted(matches)
 
 
+@tvm.testing.requires_llvm
+def test_llvm_import():
+    """all-platform-minimal-test: check shell dependent clang behavior."""
+    # extern "C" is necessary to get the correct signature
+    cc_code = """
+    extern "C" float my_add(float x, float y) {
+      return x + y;
+    }
+    """
+    n = 10
+    A = te.placeholder((n,), name="A")
+    B = te.compute(
+        (n,), lambda *i: tvm.tir.call_pure_extern("float32", "my_add", A(*i), 1.0), name="B"
+    )
+
+    def check_llvm(use_file):
+        if not clang.find_clang(required=False):
+            print("skip because clang is not available")
+            return
+        temp = utils.tempdir()
+        ll_path = temp.relpath("temp.ll")
+        ll_code = clang.create_llvm(cc_code, output=ll_path)
+        s = te.create_schedule(B.op)
+        if use_file:
+            s[B].pragma(s[B].op.axis[0], "import_llvm", ll_path)
+        else:
+            s[B].pragma(s[B].op.axis[0], "import_llvm", ll_code)
+        # BUILD and invoke the kernel.
+        f = tvm.build(s, [A, B], "llvm")
+        dev = tvm.cpu(0)
+        # launch the kernel.
+        a = tvm.nd.array(np.random.uniform(size=n).astype(A.dtype), dev)
+        b = tvm.nd.array(np.random.uniform(size=n).astype(B.dtype), dev)
+        f(a, b)
+        tvm.testing.assert_allclose(b.numpy(), a.numpy() + 1.0)
+
+    check_llvm(use_file=True)
+    check_llvm(use_file=False)
+
+
 if __name__ == "__main__":
     sys.exit(pytest.main([__file__] + sys.argv[1:]))