bug_fix_for_gemm_copy (#378)

* fixed a bug related to removing gemm copy

* clang format

* fix review comments

* clang format

* fix unit test failure

* fix review comments

* clang format

src/targets/gpu/lowering.cpp

@@ -198,26 +198,27 @@ struct miopen_apply
             auto&& op                         = any_cast<Op>(ins->get_operator());
             auto beta                         = op.beta;
             std::vector<instruction_ref> refs = ins->inputs();
-            if((refs.size() == 2) or (refs.size() == 3 and refs.back()->outputs().size() > 1) or
-               (ins == last))
-            {
-                auto output = insert_allocation(ins, ins->get_shape());
             if(refs.size() == 2)
             {
+                auto output = insert_allocation(ins, ins->get_shape());
                 beta        = 0;
                 refs.push_back(output);
             }
             else
             {
+                auto c_alias = instruction::get_output_alias(refs.back());
+                if(ins == last or refs.back()->outputs().size() > 1 or c_alias->inputs().empty())
+                {
+                    auto output   = insert_allocation(ins, ins->get_shape());
                     auto copy_out = prog->insert_instruction(ins, hip_copy{}, refs.back(), output);
                     refs.back()   = copy_out;
                     refs.push_back(copy_out);
                 }
-            }
                 else
                 {
                     refs.push_back(refs.back());
                 }
+            }
 
             return prog->replace_instruction(ins, rocblas_gemm<Op>{Op{op.alpha, beta}}, refs);
         });

test/gpu/ops_test.cpp

@@ -138,6 +138,7 @@ migraphx::argument run_gpu(migraphx::program& p)
     EXPECT(is_shared(ctx, p.get_context()));
     p.dry_run(m);
     EXPECT(is_shared(ctx, p.get_context()));
+    p.eval(m);
     return migraphx::gpu::from_gpu(p.eval(m));
 }
 
@@ -1052,6 +1053,24 @@ struct test_gemm : verify_program<test_gemm>
     }
 };
 
+struct test_gemm_copy : verify_program<test_gemm_copy>
+{
+    migraphx::program create_program() const
+    {
+        migraphx::program p;
+        migraphx::shape sa{migraphx::shape::float_type, {2, 16}};
+        migraphx::shape sb{migraphx::shape::float_type, {16, 8}};
+        migraphx::shape sc{migraphx::shape::float_type, {2, 8}};
+        auto pa = p.add_parameter("a", sa);
+        auto pb = p.add_parameter("b", sb);
+        auto pc = p.add_parameter("c", sc);
+        auto dr = p.add_instruction(migraphx::op::dot{}, pa, pb, pc);
+        p.add_instruction(migraphx::op::add{}, dr, dr);
+
+        return p;
+    }
+};
+
 struct test_gemm_ex : verify_program<test_gemm_ex>
 {
     migraphx::program create_program() const

test/gpu/quantization.cpp

@@ -15,55 +15,22 @@
 #include "test.hpp"
 #include <migraphx/half.hpp>
 
-TEST_CASE(target_copy)
+TEST_CASE(gpu_target_copy)
 {
-    auto run_prog = [](migraphx::program p,
-                       const migraphx::target& t,
-                       migraphx::program::parameter_map& m_in,
-                       std::vector<float>& res) {
-        p.compile(t);
-        migraphx::program::parameter_map m;
-        for(auto&& x : p.get_parameter_shapes())
-        {
-            if(m_in.count(x.first) > 0)
-            {
-                m[x.first] = t.copy_to(m_in[x.first]);
-            }
-            else
-            {
-                m[x.first] = t.allocate(x.second);
-            }
-        }
-
-        auto result = t.copy_from(p.eval(m));
-        result.visit([&](auto v) { res.assign(v.begin(), v.end()); });
-    };
-
-    auto create_program = [] {
-        migraphx::program p;
-        migraphx::shape s{migraphx::shape::float_type, {3, 3}};
-        auto p1 = p.add_parameter("x", s);
-        auto p2 = p.add_parameter("y", s);
-        p.add_instruction(migraphx::op::add{}, p1, p2);
-
-        return p;
-    };
-
-    {
-        auto p = create_program();
-        migraphx::program::parameter_map m;
-        migraphx::shape s{migraphx::shape::float_type, {3, 3}};
-        m["x"] = migraphx::generate_argument(s);
-        std::vector<float> cpu_result;
+    migraphx::target gpu_t = migraphx::gpu::target{};
     migraphx::target cpu_t = migraphx::cpu::target{};
-        run_prog(p, cpu_t, m, cpu_result);
+    migraphx::shape s{migraphx::shape::int8_type, {2, 3, 4, 5}};
 
-        std::vector<float> gpu_result;
-        migraphx::target gpu_t = migraphx::gpu::target{};
-        run_prog(p, gpu_t, m, gpu_result);
+    auto cpu_arg_orig  = migraphx::generate_argument(s, 0x123456L);
+    auto gpu_arg       = gpu_t.copy_to(cpu_arg_orig);
+    auto cpu_arg_final = gpu_t.copy_from(gpu_arg);
 
-        EXPECT(migraphx::verify_range(cpu_result, gpu_result));
-    }
+    std::vector<int8_t> val_orig;
+    cpu_arg_orig.visit([&](auto v) { val_orig.assign(v.begin(), v.end()); });
+    std::vector<int8_t> val_final;
+    cpu_arg_final.visit([&](auto v) { val_final.assign(v.begin(), v.end()); });
+
+    EXPECT(migraphx::verify_range(val_orig, val_final));
 }
 
 TEST_CASE(int8_quantization)
@@ -110,8 +77,10 @@ TEST_CASE(int8_quantization)
         auto p = create_program();
         migraphx::program::parameter_map m;
         migraphx::shape sa{migraphx::shape::float_type, {2, 16}};
+        migraphx::shape sb{migraphx::shape::float_type, {16, 8}};
         migraphx::shape sc{migraphx::shape::float_type, {2, 8}};
         m["a"] = migraphx::generate_argument(sa);
+        m["b"] = migraphx::generate_argument(sb);
         m["c"] = migraphx::generate_argument(sc);
         std::vector<float> cpu_result;
         migraphx::target cpu_t = migraphx::cpu::target{};