[MHLO] Init MHLO matmul op patterns

See RFC #999

Co-authored-by: Bairen Yi yibairen.byron@bytedance.com
Co-authored-by: Jiawei Wu xremold@gmail.com
Co-authored-by: Tianyou Guo tianyou.gty@alibaba-inc.com
Co-authored-by: Xu Yan yancey.yx@alibaba-inc.com
Co-authored-by: Ziheng Jiang ziheng.jiang@bytedance.com

lib/Conversion/TorchToMhlo/CMakeLists.txt

@@ -3,13 +3,15 @@ add_mlir_conversion_library(TorchMLIRTorchToMhlo
   MhloLegalizeUtils.cpp
   BasicOp.cpp
   GatherOp.cpp
+  MatmulOp.cpp
   ViewLikeOps.cpp
 
   ADDITIONAL_HEADER_DIRS
   ${PROJECT_SOURCE_DIR}/include/torch-mlir/Conversion/TorchToMhlo
 
   DEPENDS
   MhloDialect
+  ChloDialect
   TorchMLIRConversionPassIncGen
 
   LINK_COMPONENTS
@@ -19,6 +21,7 @@ add_mlir_conversion_library(TorchMLIRTorchToMhlo
   MLIRIR
   MLIRPass
   MhloDialect
+  ChloDialect
   TorchMLIRTorchDialect
 )