accelerate opencl compilation time test=develop (#1961)

* accelerate opencl compilation time test=develop

* fix style test=develop

mobile/src/framework/cl/cl_scope.h

@@ -29,7 +29,7 @@ limitations under the License. */
 namespace paddle_mobile {
 
 extern const std::map<std::string, std::vector<unsigned char>> opencl_kernels;
-extern const std::vector<std::string> need_conv_header_kernels;
+extern const std::map<std::string, std::vector<unsigned char>> opencl_headers;
 
 namespace framework {
 
@@ -48,7 +48,7 @@ class CLScope {
       const std::string &kernel_name, const std::string &file_name,
       const std::string &options) {
     DLOG << " to get program " << file_name;
-    auto program = Program(file_name, options);
+    auto program = Program(file_name, kernel_name, options);
     DLOG << " end get program ~ ";
     DLOG << " to create kernel: " << kernel_name;
     std::unique_ptr<_cl_kernel, CLKernelDeleter> kernel(
@@ -60,26 +60,24 @@ class CLScope {
 
   cl_context Context() { return context_; }
 
-  cl_program Program(const std::string &file_name, const std::string &options) {
-    std::string program_key = file_name;
-    if (!options.empty()) {
-      program_key += options;
-    }
-    auto it = programs_.find(program_key);
-    if (it != programs_.end()) {
-      return it->second.get();
-    }
-
-    if (opencl_kernels.find(file_name) != opencl_kernels.end()) {
-      auto it = opencl_kernels.find(file_name);
-      std::string source(it->second.begin(), it->second.end());
-      if (std::find(need_conv_header_kernels.begin(),
-                    need_conv_header_kernels.end(),
-                    file_name) != need_conv_header_kernels.end()) {
-        auto it = opencl_kernels.find("conv_kernel.inc.cl");
-        std::string header(it->second.begin(), it->second.end());
-        source = header + source;
+  cl_program Program(const std::string &file_name,
+                     const std::string &kernel_name,
+                     const std::string &options) {
+    if (opencl_kernels.find(kernel_name) != opencl_kernels.end() &&
+        opencl_headers.find(file_name) != opencl_headers.end()) {
+      std::string program_key = file_name + kernel_name;
+      if (!options.empty()) {
+        program_key += options;
+      }
+      auto it = programs_.find(program_key);
+      if (it != programs_.end()) {
+        return it->second.get();
       }
+      auto src_it = opencl_kernels.find(kernel_name);
+      std::string source(src_it->second.begin(), src_it->second.end());
+      auto header_it = opencl_headers.find(file_name);
+      std::string header(header_it->second.begin(), header_it->second.end());
+      source = header + "\n" + source;
       auto program = CLEngine::Instance()->CreateProgramWithSource(
           context_, source.c_str());
 
@@ -88,7 +86,16 @@ class CLScope {
       DLOG << " --- end build program -> " << program_key << " --- ";
 
       programs_[program_key] = std::move(program);
+      return programs_[program_key].get();
     } else {
+      std::string program_key = file_name;
+      if (!options.empty()) {
+        program_key += options;
+      }
+      auto it = programs_.find(program_key);
+      if (it != programs_.end()) {
+        return it->second.get();
+      }
       auto program = CLEngine::Instance()->CreateProgramWith(
           context_,
           CLEngine::Instance()->GetCLPath() + "/cl_kernel/" + file_name);
@@ -98,9 +105,8 @@ class CLScope {
       DLOG << " --- end build program -> " << program_key << " --- ";
 
       programs_[program_key] = std::move(program);
+      return programs_[program_key].get();
     }
-
-    return programs_[program_key].get();
   }
 
   CLLocalWorkSizeInfo LocalWorkSizeInfo() { return localWorkSizeInfo_; }

mobile/src/operators/kernel/cl/gen_code.py

@@ -24,11 +24,13 @@ def gen_opencl_kernels():
     #include <string>
     #include <vector>
     namespace paddle_mobile {
+        // func name => source
         extern const std::map<std::string, std::vector<unsigned char>> opencl_kernels = {
     %s
         };
-        extern const std::vector<std::string> need_conv_header_kernels = {
-            %s
+        // file name => header
+        extern const std::map<std::string, std::vector<unsigned char>> opencl_headers = {
+    %s
         };
     }
     #endif
@@ -41,66 +43,143 @@ def gen_opencl_kernels():
             hex_list.append(hex_)
         return hex_list
 
+    def clean_source(content):
+        new_content = re.sub(r"/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/", "", content, flags=re.DOTALL)
+        lines = new_content.split("\n")
+        new_lines = []
+        for i in range(len(lines)):
+            line = lines[i]
+            line = re.sub(r"//.*$", "", line)
+            line = line.strip()
+            if line == "":
+                continue
+            new_lines.append(line)
+        new_content = "\n".join(new_lines)
+        return new_content
+
     infile = open("cl_kernel/cl_common.h", "r")
     common_content = infile.read()
     infile.close()
-    common_content = re.sub(r"/\*[^*]*\*/", "", common_content, flags=re.DOTALL)
-    lines = common_content.split("\n")
-    new_lines = []
-    for i in range(len(lines)):
-        line = lines[i]
-        line = line.strip()
-        if line == "":
-            continue
-        if line.startswith("//"):
-            continue
-        line = re.sub(r"//.*$", "", line)
-        new_lines.append(line)
-    common_content = "\n".join(new_lines)
-
-    need_conv_header_kernels = []
-
-    cores = ""
+    common_content = clean_source(common_content)
+
+    infile = open("cl_kernel/conv_kernel.inc.cl", "r")
+    inc_content = infile.read()
+    infile.close()
+    inc_content = clean_source(inc_content)
+
+    def get_header_raw(content):
+        lines = content.split("\n")
+        new_lines = []
+        for line in lines:
+            if "__kernel void" in line:
+                break
+            new_lines.append(line)
+        header = "\n".join(new_lines)
+        return header
+    common_header = get_header_raw(common_content)
+    inc_header = get_header_raw(inc_content)
+
+    def get_header(content):
+        lines = content.split("\n")
+        new_lines = []
+        for line in lines:
+            if "__kernel void" in line:
+                break
+            new_lines.append(line)
+        for i in range(len(new_lines)):
+            if "#include \"conv_kernel.inc.cl\"" in new_lines[i]:
+                new_lines[i] = inc_header
+        header = "\n".join(new_lines)
+        new_lines = header.split("\n")
+        for i in range(len(new_lines)):
+            if "#include \"cl_common.h\"" in new_lines[i]:
+                new_lines[i] = common_header
+        header = "\n".join(new_lines)
+        return header
+
+    def get_funcs(content):
+        funcs = {}
+        lines = content.split("\n")
+        first_kernel_idx = None
+        for i in range(len(lines)):
+            if "__kernel void" in lines[i]:
+                first_kernel_idx = i
+                break
+        if first_kernel_idx is None:
+            return funcs
+        lines = lines[first_kernel_idx:]
+        func = []
+        name = ""
+        for line in lines:
+            if "__kernel void" in line:
+                if name != "":
+                    funcs[name] = "\n".join(func)
+                    name = ""
+                    func = []
+                pattern = re.compile("__kernel void ([^(]+)\(")
+                match = pattern.search(line)
+                name = match.group(1)
+            func.append(line)
+        if name != "":
+            funcs[name] = "\n".join(func)
+            name = ""
+            func = []
+        return funcs
+
     filenames = os.listdir("cl_kernel")
     file_count = len(filenames)
+
+    headers = {}
+    funcs = {}
     for i in range(file_count):
         filename = filenames[i]
         infile = open("cl_kernel/" + filename, "r")
-        new_lines = []
         content = infile.read()
-        content = re.sub(r"/\*[^*]*\*/", "", content, flags=re.DOTALL)
         infile.close()
-        lines = content.split("\n")
-        for i in range(len(lines)):
-            line = lines[i]
-            line = line.strip()
-            if line == "":
-                continue
-            if line.startswith("//"):
-                continue
-            line = re.sub(r"//.*$", "", line)
-            if "cl_common.h" in line:
-                line = common_content
-            elif "conv_kernel.inc.cl" in line:
-                need_conv_header_kernels.append("\"%s\"" % filename)
-                continue
-            new_lines.append(line)
-        content = "\n".join(new_lines)
+        content = clean_source(content)
+        header = get_header(content)
+        headers[filename] = header
+        funcs_temp = get_funcs(content)
+        for key in funcs_temp:
+            funcs[key] = funcs_temp[key]
+
+    core1 = ""
+    core2 = ""
+
+    for i in range(len(funcs)):
+        func_name = list(funcs.keys())[i]
+        content = funcs[func_name]
         if content == "":
             content = " "
         hexes = []
         for char in content:
             hexes.append(hex(ord(char)))
-        core = "        {\"%s\", {" % filename
+        core = "        {\"%s\", {" % func_name
         for item in hexes:
             core += str(item) + ", "
         core = core[: -2]
         core += "}}"
-        if i != file_count - 1:
+        if i != len(funcs) - 1:
             core += ",\n"
-        cores += core
+        core1 += core
 
-    source = source % (cores, ",".join(need_conv_header_kernels))
+    for i in range(len(headers)):
+        file_name = list(headers.keys())[i]
+        content = headers[file_name]
+        if content == "":
+            content = " "
+        hexes = []
+        for char in content:
+            hexes.append(hex(ord(char)))
+        core = "        {\"%s\", {" % file_name
+        for item in hexes:
+            core += str(item) + ", "
+        core = core[: -2]
+        core += "}}"
+        if i != len(headers) - 1:
+            core += ",\n"
+        core2 += core
+    source = source % (core1, core2)
     print(source)
 
 def gen_empty_opencl_kernels():
@@ -111,9 +190,11 @@ def gen_empty_opencl_kernels():
     #include <string>
     #include <vector>
     namespace paddle_mobile {
+        // func name => source
         extern const std::map<std::string, std::vector<unsigned char>> opencl_kernels = {
         };
-        extern const std::vector<std::string> need_conv_header_kernels = {
+        // file name => header
+        extern const std::map<std::string, std::vector<unsigned char>> opencl_headers = {
         };
     }
     #endif