Move ProgramStructure out the BMv2 folder such that it can be used in other back ends.

BUILD.bazel

@@ -263,13 +263,24 @@ cc_library(
     ],
 )
 
+cc_library(
+    name = "p4c_backends_common_lib",
+    srcs = glob(["backends/common/*.cpp"]),
+    hdrs = glob(["backends/common/*.h"]),
+    deps = [
+        ":ir_frontend_midend_control_plane",
+        ":lib",
+    ],
+)
+
 cc_library(
     name = "p4c_bmv2_common_lib",
     srcs = glob(["backends/bmv2/common/*.cpp"]),
     hdrs = glob(["backends/bmv2/common/*.h"]),
     deps = [
         ":ir_frontend_midend_control_plane",
         ":lib",
+        ":p4c_backends_common_lib",
     ],
 )
 
@@ -283,6 +294,7 @@ cc_library(
     deps = [
         ":ir_frontend_midend_control_plane",
         ":lib",
+        ":p4c_backends_common_lib",
         ":p4c_bmv2_common_lib",
     ],
 )
@@ -305,6 +317,7 @@ cc_binary(
     deps = [
         ":ir_frontend_midend_control_plane",
         ":lib",
+        ":p4c_backends_common_lib",
         ":p4c_bmv2_common_lib",
         ":p4c_bmv2_simple_lib",
     ],

CMakeLists.txt

@@ -459,6 +459,7 @@ add_subdirectory (control-plane)
 # share the same set of IR classes (frontend and backend). Backends such as the DPDK backend
 # can introduce additional IR classes and cpp sources which need to be added to
 # EXTENSION_IR_SOURCES.
+add_subdirectory(backends/common)
 if (ENABLE_BMV2)
     add_subdirectory (backends/bmv2)
 endif ()

backends/bmv2/CMakeLists.txt

@@ -36,8 +36,6 @@ set (BMV2_PSA_SWITCH_SRCS
     psa_switch/midend.h
     psa_switch/psaSwitch.cpp
     psa_switch/psaSwitch.h
-    psa_switch/psaProgramStructure.cpp
-    psa_switch/psaProgramStructure.h
     psa_switch/options.cpp
     psa_switch/options.h
     )
@@ -53,9 +51,7 @@ set (BMV2_BACKEND_COMMON_SRCS
   common/header.cpp
   common/helpers.cpp
   common/lower.cpp
-  common/metermap.cpp
   common/parser.cpp
-  common/programStructure.cpp
   )
 
 set (BMV2_BACKEND_COMMON_HDRS
@@ -73,18 +69,16 @@ set (BMV2_BACKEND_COMMON_HDRS
   common/header.h
   common/helpers.h
   common/lower.h
-  common/metermap.h
   common/midend.h
   common/options.h
   common/parser.h
-  common/programStructure.h
   common/sharedActionSelectorCheck.h
   )
 
 set (IR_DEF_FILES ${IR_DEF_FILES} ${CMAKE_CURRENT_SOURCE_DIR}/bmv2.def PARENT_SCOPE)
 
 add_library(bmv2backend STATIC ${BMV2_BACKEND_COMMON_SRCS})
-target_link_libraries(bmv2backend ir-generated frontend)
+target_link_libraries(bmv2backend ir-generated frontend backends-common)
 
 add_executable(p4c-bm2-ss ${BMV2_SIMPLE_SWITCH_SRCS})
 target_link_libraries (p4c-bm2-ss bmv2backend ${P4C_LIBRARIES} ${P4C_LIB_DEPS})

backends/bmv2/common/backend.h

@@ -31,7 +31,6 @@ limitations under the License.
 #include "lib/json.h"
 #include "lib/log.h"
 #include "lib/nullstream.h"
-#include "metermap.h"
 #include "midend/actionSynthesis.h"
 #include "midend/convertEnums.h"
 #include "midend/removeComplexExpressions.h"

backends/bmv2/common/expression.h

@@ -17,6 +17,7 @@ limitations under the License.
 #ifndef BACKENDS_BMV2_COMMON_EXPRESSION_H_
 #define BACKENDS_BMV2_COMMON_EXPRESSION_H_
 
+#include "backends/common/programStructure.h"
 #include "frontends/common/resolveReferences/referenceMap.h"
 #include "frontends/p4/coreLibrary.h"
 #include "frontends/p4/enumInstance.h"
@@ -26,7 +27,6 @@ limitations under the License.
 #include "lib/big_int_util.h"
 #include "lib/json.h"
 #include "lower.h"
-#include "programStructure.h"
 
 namespace BMV2 {
 
@@ -51,7 +51,7 @@ class ArithmeticFixup : public Transform {
 class ExpressionConverter : public Inspector {
     P4::ReferenceMap *refMap;
     P4::TypeMap *typeMap;
-    ProgramStructure *structure;
+    P4::ProgramStructure *structure;
     P4::P4CoreLibrary &corelib;
     cstring scalarsName;
 
@@ -68,8 +68,8 @@ class ExpressionConverter : public Inspector {
     bool withConstantWidths{false};
 
  public:
-    ExpressionConverter(P4::ReferenceMap *refMap, P4::TypeMap *typeMap, ProgramStructure *structure,
-                        cstring scalarsName)
+    ExpressionConverter(P4::ReferenceMap *refMap, P4::TypeMap *typeMap,
+                        P4::ProgramStructure *structure, cstring scalarsName)
         : refMap(refMap),
           typeMap(typeMap),
           structure(structure),

backends/bmv2/common/extern.h

@@ -17,10 +17,10 @@ limitations under the License.
 #ifndef BACKENDS_BMV2_COMMON_EXTERN_H_
 #define BACKENDS_BMV2_COMMON_EXTERN_H_
 
+#include "backends/common/programStructure.h"
 #include "frontends/p4/methodInstance.h"
 #include "helpers.h"
 #include "ir/ir.h"
-#include "programStructure.h"
 
 namespace BMV2 {
 

backends/bmv2/common/header.h

@@ -21,12 +21,12 @@ limitations under the License.
 
 #include "JsonObjects.h"
 #include "backends/bmv2/common/options.h"
+#include "backends/common/programStructure.h"
 #include "frontends/common/resolveReferences/referenceMap.h"
 #include "frontends/p4/typeMap.h"
 #include "helpers.h"
 #include "ir/ir.h"
 #include "lib/json.h"
-#include "programStructure.h"
 
 namespace BMV2 {
 

backends/bmv2/common/helpers.h

@@ -18,6 +18,7 @@ limitations under the License.
 #define BACKENDS_BMV2_COMMON_HELPERS_H_
 
 #include "JsonObjects.h"
+#include "backends/common/programStructure.h"
 #include "controlFlowGraph.h"
 #include "expression.h"
 #include "frontends/common/model.h"
@@ -26,7 +27,6 @@ limitations under the License.
 #include "lib/cstring.h"
 #include "lib/json.h"
 #include "lib/ordered_map.h"
-#include "programStructure.h"
 
 namespace BMV2 {
 
@@ -58,6 +58,17 @@ class V1ModelProperties {
     static const cstring validField;
 };
 
+// V1Model-specific blocks.
+enum class BlockConverted {
+    None,
+    Parser,
+    Ingress,
+    Egress,
+    Deparser,
+    ChecksumCompute,
+    ChecksumVerify
+};
+
 namespace Standard {
 
 /// We re-use as much code as possible between PSA and v1model. The two
@@ -268,7 +279,7 @@ struct ConversionContext {
     /// Block currently being converted.
     BlockConverted blockConverted;
     /// ProgramStructure pointer.
-    ProgramStructure *structure;
+    P4::ProgramStructure *structure;
     /// Expression converter is used in many places.
     ExpressionConverter *conv;
     /// Final json output.
@@ -286,7 +297,7 @@ struct ConversionContext {
     }
 
     ConversionContext(P4::ReferenceMap *refMap, P4::TypeMap *typeMap,
-                      const IR::ToplevelBlock *toplevel, ProgramStructure *structure,
+                      const IR::ToplevelBlock *toplevel, P4::ProgramStructure *structure,
                       ExpressionConverter *conv, JsonObjects *json)
         : refMap(refMap),
           typeMap(typeMap),

backends/bmv2/psa_switch/psaSwitch.cpp

@@ -253,7 +253,7 @@ void PsaSwitchBackend::convert(const IR::ToplevelBlock *tlb) {
     CHECK_NULL(tlb);
     PsaCodeGenerator structure(refMap, typeMap);
 
-    auto parsePsaArch = new ParsePsaArchitecture(&structure);
+    auto parsePsaArch = new P4::ParsePsaArchitecture(&structure);
     auto main = tlb->getMain();
     if (!main) return;
 
@@ -298,16 +298,16 @@ void PsaSwitchBackend::convert(const IR::ToplevelBlock *tlb) {
     program->apply(simplify);
 
     // map IR node to compile-time allocated resource blocks.
-    toplevel->apply(*new BMV2::BuildResourceMap(&structure.resourceMap));
+    toplevel->apply(*new P4::BuildResourceMap(&structure.resourceMap));
 
     main = toplevel->getMain();
     if (!main) return;  // no main
     main->apply(*parsePsaArch);
     if (::errorCount() > 0) return;
     program = toplevel->getProgram();
 
-    PassManager toJson = {new DiscoverStructure(&structure),
-                          new InspectPsaProgram(refMap, typeMap, &structure),
+    PassManager toJson = {new P4::DiscoverStructure(&structure),
+                          new P4::InspectPsaProgram(refMap, typeMap, &structure),
                           new ConvertPsaToJson(refMap, typeMap, toplevel, json, &structure)};
     for (const auto &pEnum : *enumMap) {
         auto name = pEnum.first->getName();
@@ -681,7 +681,7 @@ void ExternConverter_InternetChecksum::convertExternInstance(UNUSED ConversionCo
     cstring name = inst->controlPlaneName();
     auto trim = inst->controlPlaneName().find(".");
     auto block = inst->controlPlaneName().trim(trim);
-    auto psaStructure = static_cast<PsaProgramStructure *>(ctxt->structure);
+    auto psaStructure = static_cast<P4::PsaProgramStructure *>(ctxt->structure);
     auto ingressParser = psaStructure->parsers.at("ingress"_cs)->controlPlaneName();
     auto ingressDeparser = psaStructure->deparsers.at("ingress"_cs)->controlPlaneName();
     auto egressParser = psaStructure->parsers.at("egress"_cs)->controlPlaneName();

backends/bmv2/psa_switch/psaSwitch.h

@@ -25,7 +25,8 @@ limitations under the License.
 #include "backends/bmv2/common/helpers.h"
 #include "backends/bmv2/common/lower.h"
 #include "backends/bmv2/common/parser.h"
-#include "backends/bmv2/common/programStructure.h"
+#include "backends/common/programStructure.h"
+#include "backends/common/psaProgramStructure.h"
 #include "frontends/common/constantFolding.h"
 #include "frontends/common/resolveReferences/referenceMap.h"
 #include "frontends/p4/coreLibrary.h"
@@ -39,14 +40,13 @@ limitations under the License.
 #include "ir/ir.h"
 #include "lib/big_int_util.h"
 #include "lib/json.h"
-#include "psaProgramStructure.h"
 
 namespace BMV2 {
 
 class PsaSwitchExpressionConverter : public ExpressionConverter {
  public:
     PsaSwitchExpressionConverter(P4::ReferenceMap *refMap, P4::TypeMap *typeMap,
-                                 ProgramStructure *structure, cstring scalarsName)
+                                 P4::ProgramStructure *structure, cstring scalarsName)
         : BMV2::ExpressionConverter(refMap, typeMap, structure, scalarsName) {}
 
     void modelError(const char *format, const cstring field) {
@@ -56,7 +56,7 @@ class PsaSwitchExpressionConverter : public ExpressionConverter {
 
     Util::IJson *convertParam(UNUSED const IR::Parameter *param, cstring fieldName) override {
         cstring ptName = param->type->toString();
-        if (PsaProgramStructure::isCounterMetadata(ptName)) {  // check if its counter metadata
+        if (P4::PsaProgramStructure::isCounterMetadata(ptName)) {  // check if its counter metadata
             auto jsn = new Util::JsonObject();
             jsn->emplace("name"_cs, param->toString());
             jsn->emplace("type"_cs, "hexstr");
@@ -77,7 +77,8 @@ class PsaSwitchExpressionConverter : public ExpressionConverter {
                 return nullptr;
             }
             return jsn;
-        } else if (PsaProgramStructure::isStandardMetadata(ptName)) {  // check if its psa metadata
+        } else if (P4::PsaProgramStructure::isStandardMetadata(
+                       ptName)) {  // check if its psa metadata
             auto jsn = new Util::JsonObject();
 
             // encode the metadata type and field in json
@@ -94,10 +95,10 @@ class PsaSwitchExpressionConverter : public ExpressionConverter {
     }
 };
 
-class PsaCodeGenerator : public PsaProgramStructure {
+class PsaCodeGenerator : public P4::PsaProgramStructure {
  public:
     PsaCodeGenerator(P4::ReferenceMap *refMap, P4::TypeMap *typeMap)
-        : PsaProgramStructure(refMap, typeMap) {}
+        : P4::PsaProgramStructure(refMap, typeMap) {}
 
     void create(ConversionContext *ctxt);
     void createStructLike(ConversionContext *ctxt, const IR::Type_StructLike *st);

backends/bmv2/simple_switch/simpleSwitch.cpp

@@ -1199,7 +1199,7 @@ void SimpleSwitchBackend::convert(const IR::ToplevelBlock *tlb) {
     program->apply(simplify);
 
     // map IR node to compile-time allocated resource blocks.
-    toplevel->apply(*new BMV2::BuildResourceMap(&structure->resourceMap));
+    toplevel->apply(*new P4::BuildResourceMap(&structure->resourceMap));
 
     // field list and learn list ids in bmv2 are not consistent with ids for
     // other objects: they need to start at 1 (not 0) since the id is also used
@@ -1223,7 +1223,7 @@ void SimpleSwitchBackend::convert(const IR::ToplevelBlock *tlb) {
     if (!main) return;  // no main
     main->apply(*parseV1Arch);
     program = toplevel->getProgram();
-    program->apply(DiscoverStructure(structure));
+    program->apply(P4::DiscoverStructure(structure));
 
     /// generate error types
     for (const auto &p : structure->errorCodesMap) {

backends/bmv2/simple_switch/simpleSwitch.h

@@ -29,8 +29,8 @@ limitations under the License.
 #include "backends/bmv2/common/header.h"
 #include "backends/bmv2/common/options.h"
 #include "backends/bmv2/common/parser.h"
-#include "backends/bmv2/common/programStructure.h"
 #include "backends/bmv2/common/sharedActionSelectorCheck.h"
+#include "backends/common/programStructure.h"
 #include "frontends/common/constantFolding.h"
 #include "frontends/p4/evaluator/evaluator.h"
 #include "frontends/p4/fromv1.0/v1model.h"
@@ -40,7 +40,7 @@ limitations under the License.
 
 namespace BMV2 {
 
-class V1ProgramStructure : public ProgramStructure {
+class V1ProgramStructure : public P4::ProgramStructure {
  public:
     std::set<cstring> pipeline_controls;
     std::set<cstring> non_pipeline_controls;

backends/common/CMakeLists.txt

@@ -0,0 +1,15 @@
+set(BACKENDS_COMMON_SRCS
+    metermap.cpp
+    programStructure.cpp
+    psaProgramStructure.cpp
+)
+
+add_library(backends-common STATIC ${BACKENDS_COMMON_SRCS})
+
+target_link_libraries(backends-common
+  # These libraries are exposed by a header.
+  PUBLIC absl::bits
+  PUBLIC absl::strings
+  PUBLIC ${LIBGC_LIBRARIES}
+  PUBLIC ${P4C_LIBRARIES}
+)

backends/bmv2/common/metermap.cpp → backends/common/metermap.cpp

@@ -14,9 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-#include "metermap.h"
+#include "backends/common/metermap.h"
 
-namespace BMV2 {
+namespace P4 {
 
 /// @returns direct meter information from the direct meter map.
 DirectMeterMap::DirectMeterInfo *DirectMeterMap::createInfo(const IR::IDeclaration *meter) {
@@ -90,4 +90,4 @@ void DirectMeterMap::setSize(const IR::IDeclaration *meter, unsigned size) {
     info->tableSize = size;
 }
 
-}  // namespace BMV2
+}  // namespace P4