[Bug] Fix x86 dense schedule extern ops (apache#8420)

* [Bug] Fix x86 dense schedule extern ops

* more

* lint

python/tvm/topi/x86/dense.py

@@ -27,8 +27,7 @@
 from tvm.contrib import mkldnn
 
 from .utils import get_fp32_len
-from .injective import schedule_injective_from_existing
-from .. import tag
+from .. import generic, tag
 from ..utils import traverse_inline, get_const_tuple
 
 
@@ -306,17 +305,6 @@ def matmul_blas_common(cfg, tensor_a, tensor_b, bias, out_dtype, transpose_a, tr
     return C
 
 
-def schedule_matmul_blas_common(outs):
-    """Default matmul schedule for BLAS library"""
-    s = te.create_schedule([x.op for x in outs])
-    te.schedule.AutoInlineInjective(s)
-
-    for out in outs:
-        if "dense" not in out.op.tag and "matmul" not in out.op.tag:
-            schedule_injective_from_existing(s, out)
-    return s
-
-
 @autotvm.register_topi_compute("dense_cblas.x86")
 def dense_cblas(cfg, data, weight, bias=None, out_dtype=None):
     """Compute dense using cblas. This is an alias of matmul_nt operator."""
@@ -326,7 +314,7 @@ def dense_cblas(cfg, data, weight, bias=None, out_dtype=None):
 @autotvm.register_topi_schedule("dense_cblas.x86")
 def schedule_dense_cblas(_, outs):
     """Create schedule for dense_cblas. This is an alias of matmul_nt operator."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)
 
 
 @autotvm.register_topi_compute("dense_mkl.x86")
@@ -338,7 +326,7 @@ def dense_mkl(cfg, data, weight, bias=None, out_dtype=None):
 @autotvm.register_topi_schedule("dense_mkl.x86")
 def schedule_dense_mkl(_, outs):
     """Create schedule for dense_mkl. This is an alias of matmul_nt operator."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)
 
 
 @autotvm.register_topi_compute("dense_mkldnn.x86")
@@ -350,7 +338,7 @@ def dense_mkldnn(cfg, data, weight, bias=None, out_dtype=None):
 @autotvm.register_topi_schedule("dense_mkldnn.x86")
 def schedule_dense_mkldnn(_, outs):
     """Create schedule for dense_mkldnn. This is an alias of matmul_nt operator."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)
 
 
 @autotvm.register_topi_compute("matmul_cblas.x86")
@@ -366,7 +354,7 @@ def matmul_cblas(
 @autotvm.register_topi_schedule("matmul_cblas.x86")
 def schedule_matmul_cblas(_, outs):
     """Create schedule for matmul_cblas."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)
 
 
 @autotvm.register_topi_compute("matmul_mkl.x86")
@@ -382,7 +370,7 @@ def matmul_mkl(
 @autotvm.register_topi_schedule("matmul_mkl.x86")
 def schedule_matmul_mkl(_, outs):
     """Create schedule for matmul_mkl."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)
 
 
 @autotvm.register_topi_compute("matmul_mkldnn.x86")
@@ -398,4 +386,4 @@ def matmul_mkldnn(
 @autotvm.register_topi_schedule("matmul_mkldnn.x86")
 def schedule_matmul_mkldnn(_, outs):
     """Create schedule for matmul_mkldnn."""
-    return schedule_matmul_blas_common(outs)
+    return generic.schedule_extern(outs)