From 98e803e04f7057bd6bd1a6d3816b80054a7e354b Mon Sep 17 00:00:00 2001
From: Pei Yang <peiyang@baidu.com>
Date: Tue, 30 Mar 2021 20:20:48 +0800
Subject: [PATCH] map_matmul_to_mul_pass support 3dim (#31958)

---
 paddle/fluid/framework/ir/map_matmul_to_mul_pass.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/paddle/fluid/framework/ir/map_matmul_to_mul_pass.cc b/paddle/fluid/framework/ir/map_matmul_to_mul_pass.cc
index a2443c8698..c36123f65f 100644
--- a/paddle/fluid/framework/ir/map_matmul_to_mul_pass.cc
+++ b/paddle/fluid/framework/ir/map_matmul_to_mul_pass.cc
@@ -57,7 +57,7 @@ void MapMatmul2MulPass::ApplyImpl(ir::Graph* graph) const {
     std::vector<int64_t> y_shape = matmul_in_y->Var()->GetShape();
     size_t x_rank = x_shape.size();
     size_t y_rank = y_shape.size();
-    flag = flag && x_rank == 2 && y_rank == 2;
+    flag = flag && (x_rank == 2 || x_rank == 3) && y_rank == 2;
 
     std::vector<Node*>& next_ops = matmul_out->outputs;
     flag = flag && next_ops.size() == 1 &&
@@ -69,7 +69,7 @@ void MapMatmul2MulPass::ApplyImpl(ir::Graph* graph) const {
       desc.SetInput("X", {matmul_in_x->Name()});
       desc.SetInput("Y", {matmul_in_y->Name()});
       desc.SetOutput("Out", {matmul_out->Name()});
-      desc.SetAttr("x_num_col_dims", 1);
+      desc.SetAttr("x_num_col_dims", static_cast<int>(x_rank - 1));
       desc.SetAttr("y_num_col_dims", 1);
       if (matmul_op->Op()->HasAttr("enable_int8")) {
         desc.SetAttr("enable_int8", matmul_op->Op()->GetAttr("enable_int8"));
-- 
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