diff options
Diffstat (limited to 'src/cuda-sim')
| -rw-r--r-- | src/cuda-sim/cuda-sim.cc | 12 | ||||
| -rw-r--r-- | src/cuda-sim/ptx_ir.cc | 26 | ||||
| -rw-r--r-- | src/cuda-sim/ptx_ir.h | 5 |
3 files changed, 42 insertions, 1 deletions
diff --git a/src/cuda-sim/cuda-sim.cc b/src/cuda-sim/cuda-sim.cc index f51f57d..39a04dd 100644 --- a/src/cuda-sim/cuda-sim.cc +++ b/src/cuda-sim/cuda-sim.cc @@ -257,6 +257,8 @@ void function_info::ptx_assemble() fflush(stdout); printf("GPGPU-Sim PTX: finding reconvergence points for \'%s\'...\n", m_name.c_str() ); + //disable pdom analysis here and do it at runtime +#if 0 create_basic_blocks(); connect_basic_blocks(); bool modified = false; @@ -280,6 +282,7 @@ void function_info::ptx_assemble() print_postdominators(); print_ipostdominators(); } +#endif printf("GPGPU-Sim PTX: pre-decoding instructions for \'%s\'...\n", m_name.c_str() ); for ( unsigned ii=0; ii < n; ii += m_instr_mem[ii]->inst_size() ) { // handle branch instructions @@ -1801,6 +1804,15 @@ void gpgpu_cuda_ptx_sim_main_func( kernel_info_t &kernel, bool openCL ) //using a shader core object for book keeping, it is not needed but as most function built for performance simulation need it we use it here extern gpgpu_sim *g_the_gpu; + //before we execute, we should do PDOM analysis for functional simulation scenario. + function_info *kernel_func_info = kernel.entry(); + if (kernel_func_info->is_pdom_set()) { + printf("GPGPU-Sim PTX: PDOM analysis already done for %s \n", kernel.name().c_str() ); + } else { + printf("GPGPU-Sim PTX: finding reconvergence points for \'%s\'...\n", kernel.name().c_str() ); + kernel_func_info->do_pdom(); + kernel_func_info->set_pdom(); + } //we excute the kernel one CTA (Block) at the time, as synchronization functions work block wise while(!kernel.no_more_ctas_to_run()){ diff --git a/src/cuda-sim/ptx_ir.cc b/src/cuda-sim/ptx_ir.cc index 8ebdcf8..6a17eaf 100644 --- a/src/cuda-sim/ptx_ir.cc +++ b/src/cuda-sim/ptx_ir.cc @@ -575,6 +575,31 @@ bool function_info::connect_break_targets() //connecting break instructions with return modified; } +void function_info::do_pdom() { + create_basic_blocks(); + connect_basic_blocks(); + bool modified = false; + do { + find_dominators(); + find_idominators(); + modified = connect_break_targets(); + } while (modified == true); + + if ( g_debug_execution>=50 ) { + print_basic_blocks(); + print_basic_block_links(); + print_basic_block_dot(); + } + if ( g_debug_execution>=2 ) { + print_dominators(); + } + find_postdominators(); + find_ipostdominators(); + if ( g_debug_execution>=50 ) { + print_postdominators(); + print_ipostdominators(); + } +} void intersect( std::set<int> &A, const std::set<int> &B ) { // return intersection of A and B in A @@ -1305,6 +1330,7 @@ function_info::function_info(int entry_point ) m_kernel_info.smem = 0; m_local_mem_framesize = 0; m_args_aligned_size = -1; + pdom_done = false; //initialize it to false } unsigned function_info::print_insn( unsigned pc, FILE * fp ) const diff --git a/src/cuda-sim/ptx_ir.h b/src/cuda-sim/ptx_ir.h index 9ad1571..26a2839 100644 --- a/src/cuda-sim/ptx_ir.h +++ b/src/cuda-sim/ptx_ir.h @@ -1178,7 +1178,7 @@ public: //Muchnick's Adv. Compiler Design & Implemmntation Fig 7.15 void find_ipostdominators( ); void print_ipostdominators(); - + void do_pdom(); //function to call pdom analysis unsigned get_num_reconvergence_pairs(); @@ -1274,6 +1274,8 @@ public: m_local_mem_framesize = sz; } bool is_entry_point() const { return m_entry_point; } + bool is_pdom_set() const { return pdom_done; } //return pdom flag + void set_pdom() { pdom_done = true; } //set pdom flag private: unsigned m_uid; @@ -1281,6 +1283,7 @@ private: bool m_entry_point; bool m_extern; bool m_assembled; + bool pdom_done; //flag to check whether pdom is completed or not std::string m_name; ptx_instruction **m_instr_mem; unsigned m_start_PC; |