Merge commit '2ab71cf95df2fa3615909d24187b38715c20181d'

.drone.yml

@@ -0,0 +1,11 @@
+kind: pipeline
+type: docker
+name: llvmta-build
+steps:
+- name: Build
+  image: ls12-nvm-oma1:5000/cppdev
+  commands:
+  - mkdir build
+  - cd build
+  - cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=/usr ..
+  - ninja -j 2

.vscode/launch.json

@@ -4,21 +4,21 @@
   // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
-  {
+  // {
-      "type": "lldb",
+  //     "type": "lldb",
-      "request": "launch",
+  //     "request": "launch",
-      "name": "LLDB Unrolling",
+  //     "name": "LLDB Unrolling",
-      "program": "/usr/bin/opt",
+  //     "program": "/usr/bin/opt",
-      "args": [
+  //     "args": [
-        "-load-pass-plugin",
+  //       "-load-pass-plugin",
-        "${workspaceFolder}/build/libCacheAnalysisPass.so",
+  //       "${workspaceFolder}/build/libCacheAnalysisPass.so",
-        "-passes=lru-misses",
+  //       "-passes=lru-misses",
-        "${workspaceFolder}/test/cnt.ll",
+  //       "${workspaceFolder}/test/cnt.ll",
-        "-o",
+  //       "-o",
-        "/dev/null"
+  //       "/dev/null"
-      ],
+  //     ],
-      "cwd": "${workspaceFolder}"
+  //     "cwd": "${workspaceFolder}"
-    },
+  //   },
     {
       "type": "lldb",
       "request": "launch",

CMakeLists.txt

@@ -1,6 +1,19 @@
 cmake_minimum_required(VERSION 3.13.4)
 project(RTSA-lab01-CacheAnalysis)
 
+#===============================================================================
+# 0. Add GoogleTest
+#===============================================================================
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  URL 
+  URL https://github.com/google/googletest/archive/refs/heads/main.zip
+)
+# For Windows: Prevent overriding the parent project's compiler/linker settings
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
+
 #===============================================================================
 # 1. VERIFY LLVM INSTALLATION DIR
 # This is just a bit of a sanity checking.
@@ -108,4 +121,5 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib")
 # available for the sub-projects.
 #===============================================================================
 add_subdirectory(CacheAnalysisPass)  # Use your pass name here.
+add_subdirectory(UnitTest)
 #add_subdirectory(lib)

CacheAnalysisPass/CacheAnalysisPass.cpp

@@ -215,15 +215,15 @@ struct CacheAnalysisPass : PassInfoMixin<CacheAnalysisPass> {
   }
 
   PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM) {
-    FunctionAnalysisManager &FAM =
+    // FunctionAnalysisManager &FAM =
-        MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
+    //     MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
 
     addressCollector(M);
-    Function *EntryFunction;
+    // Function *EntryFunction;
     for (Function &F : M.getFunctionList()) {
       // Start iterating through CFG from entry point
       if (F.getName().equals(EntryPoint)) {
-        EntryFunction = &F;
+        // EntryFunction = &F;
         initEdges(F);
       }
       if (PrintAddresses)

README.md

@@ -1,10 +1,18 @@
 # RTSA-lab01-CacheAnalysis
 
+[![Build Status](http://129.217.34.203/api/badges/nils.hoelscher/RTSA-lab01-CacheAnalysis/status.svg)](http://129.217.34.203/nils.hoelscher/RTSA-lab01-CacheAnalysis)
+
 In this lab session you will learn how to implement a LRU cache in abstract representation.
-The Goal is to implement an LRU must Join in include/AbstractState.h.
+
-For this we assume a "Set-Associative LRU Cache", with 16 sets an associativity of 4 and a cacheline size of two times instruction size.
+## Exercise
+Implement a LRU Must-Join as described in the lecture, WCET - Cache Analysis.
+A 16 SetCache with an associativity of 4 Assumed, and cache lines can hold two memory words -> CacheSize 1024kB.
+In order to do so, complete the function "mustJoin" inside [include/AbstractState.h:138](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/include/AbstractState.h#L138).
+The goal is to join the inbound state into the "this" state.
+
 
 The Project can be build, tested and Evaluated with the "helper" script.
+The Setup and some nice to knows are described in the following sections.
 
 ## Disclaimer
 
@@ -82,6 +90,7 @@ This is my personally preferred IDE setup for C/C++ and by no means needed to ac
 clangd,
 Clang-Format,
 CodeLLDB,
+C++ TestMate,
 Docker and
 Remote Development
 
@@ -145,6 +154,12 @@ You can also set the following variables in the CacheAnalysisPass/CacheAnalysisP
 
 Helpful to understand what the program does but not very so much for the actual exercise.
 
+## UnitTest
+
+The best way to see what your function does is to use the [UnitTest.cpp](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/UnitTest/UnitTest.cpp).
+With "C++ TestMate" install you can simply run or debug the test from the side panel in VS Code (Flask Icon).
+The "C++ TestMate" is not installed in the VM as I just added this feature now.
+Please feel free to add more test cases to your liking in [UnitTest.cpp](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/UnitTest/UnitTest.cpp).
 ## Use the Helper script
 
 Again if you work on a Pool PC use poolhelper.sh insted of the helper.sh script.

UnitTest/CMakeLists.txt

@@ -0,0 +1,52 @@
+cmake_minimum_required(VERSION 3.13.4)
+project(UnitTest)
+
+#===============================================================================
+# 1. LOAD LLVM CONFIGURATION
+#===============================================================================
+# Set this to a valid LLVM installation dir
+set(LT_LLVM_INSTALL_DIR "" CACHE PATH "LLVM installation directory")
+
+# Add the location of LLVMConfig.cmake to CMake search paths (so that
+# find_package can locate it)
+list(APPEND CMAKE_PREFIX_PATH "${LT_LLVM_INSTALL_DIR}/lib/cmake/llvm/")
+
+# FIXME: This is a warkaround for #25. Remove once resolved and use
+# find_package(LLVM 11.0.0 REQUIRED CONFIG) instead.
+find_package(LLVM REQUIRED CONFIG)
+
+# UnitTest includes headers from LLVM - update the include paths accordingly
+include_directories(SYSTEM ${LLVM_INCLUDE_DIRS}, "${CMAKE_CURRENT_SOURCE_DIR}/../include")
+
+#===============================================================================
+# 2. LLVM-TUTOR BUILD CONFIGURATION
+#===============================================================================
+# Use the same C++ standard as LLVM does
+set(CMAKE_CXX_STANDARD 14 CACHE STRING "")
+
+# LLVM is normally built without RTTI. Be consistent with that.
+if(NOT LLVM_ENABLE_RTTI)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
+endif()
+
+#===============================================================================
+# 3. ADD THE TARGET
+#===============================================================================
+enable_testing()
+
+add_executable(UnitTest 
+    # List your source files here.
+    UnitTest.cpp
+)
+
+
+# Allow undefined symbols in shared objects on Darwin (this is the default
+# behaviour on Linux)
+target_link_libraries(UnitTest
+  "$<$<PLATFORM_ID:Darwin>:-undefined dynamic_lookup>")
+  target_link_libraries(
+  UnitTest
+  gtest_main
+)
+include(GoogleTest)
+gtest_discover_tests(UnitTest)

UnitTest/UnitTest.cpp

@@ -0,0 +1,174 @@
+#include <gtest/gtest.h>
+#include <sys/stat.h>
+
+#include "../include/AbstractCache.h"
+
+void fillSet(AbstractState &In, unsigned int Set) {
+  for (int I = 0; I < 4; I++) {
+    In.Sets[Set].Associativity[I].Blocks.push_front(I);
+  }
+}
+
+// Joined Set should remain the same
+TEST(MustJoinTests, MustJoinSameStates) {
+  AbstractCache AC;
+  AC.addEmptyNode(0);
+  fillSet(AC.Nodes[0], 0);
+  AC.addEmptyNode(1);
+  fillSet(AC.Nodes[1], 0);
+
+  AC.Nodes[0].mustJoin(AC.Nodes[1]);
+  for (auto B : AC.Nodes[0].Sets[0].Associativity) {
+    uint Age = B.first;
+    EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(),
+              AC.Nodes[1].Sets[0].Associativity[Age].Blocks.front());
+  }
+}
+
+void counterFillSet(AbstractState &In, unsigned int Set) {
+  for (int I = 0; I < 4; I++) {
+    In.Sets[Set].Associativity[I].Blocks.push_front((I + 1) % 4);
+  }
+}
+
+// Resulting state should be
+// Set[0]:
+//   Age[0]:
+//   Age[1]: 1
+//   Age[2]: 2
+//   Age[3]: 0 3
+TEST(MustJoinTests, MustJoinDifferentStates) {
+  AbstractCache AC;
+  AC.addEmptyNode(0);
+  counterFillSet(AC.Nodes[0], 0);
+  AC.addEmptyNode(1);
+  fillSet(AC.Nodes[1], 0);
+  std::cout << "==Before:==\n";
+  AC.Nodes[0].dumpSet(0);
+  AC.Nodes[1].dumpSet(0);
+
+  AC.Nodes[0].mustJoin(AC.Nodes[1]);
+  std::cout << "\n==After:==\n";
+  AC.Nodes[0].dumpSet(0);
+  for (auto B : AC.Nodes[0].Sets[0].Associativity) {
+    uint Age = B.first;
+    switch (Age) {
+    case 0:
+      EXPECT_TRUE(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.empty());
+      break;
+    case 1:
+      EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(), 1);
+      break;
+    case 2:
+      EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(), 2);
+      break;
+    case 3:
+      // this test is not very exact the Set 0 with age 3 should contain (0,3)
+      // in arbitrary order
+      EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.size(), 2);
+      break;
+    default:
+      // should never be reached!
+      EXPECT_TRUE(false);
+    }
+  }
+}
+
+void fillSetHighNumbers(AbstractState &In, unsigned int Set) {
+  for (int I = 0; I < 4; I++) {
+    In.Sets[Set].Associativity[I].Blocks.push_front(10 + I);
+  }
+}
+
+// resulting state should be empty
+TEST(MustJoinTests, MustJoinDisjunctStates) {
+  AbstractCache AC;
+  AC.addEmptyNode(0);
+  fillSetHighNumbers(AC.Nodes[0], 0);
+  AC.addEmptyNode(1);
+  fillSet(AC.Nodes[1], 0);
+  std::cout << "==Before:==\n";
+  AC.Nodes[0].dumpSet(0);
+  AC.Nodes[1].dumpSet(0);
+
+  AC.Nodes[0].mustJoin(AC.Nodes[1]);
+  std::cout << "\n==After:==\n";
+  AC.Nodes[0].dumpSet(0);
+  for (auto B : AC.Nodes[0].Sets[0].Associativity) {
+    uint Age = B.first;
+    EXPECT_TRUE(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.empty());
+  }
+}
+
+TEST(MustJoinTests, MustJoinDisjunctStatesAllSets) {
+  AbstractCache AC;
+  AC.addEmptyNode(0);
+  AC.addEmptyNode(1);
+  for (int I = 0; I < 16; I++) {
+    fillSetHighNumbers(AC.Nodes[0], I);
+    fillSet(AC.Nodes[1], I);
+  }
+
+  std::cout << "==Before:==\n";
+  AC.Nodes[0].dump();
+  AC.Nodes[1].dump();
+
+  AC.Nodes[0].mustJoin(AC.Nodes[1]);
+  std::cout << "\n==After:==\n";
+  AC.Nodes[0].dump();
+  for (auto Set : AC.Nodes[0].Sets) {
+    for (auto B : Set.second.Associativity) {
+      EXPECT_TRUE(B.second.Blocks.empty());
+    }
+  }
+}
+
+TEST(MustJoinTests, MustJoinDifferentStatesAllSets) {
+  AbstractCache AC;
+  AC.addEmptyNode(0);
+  AC.addEmptyNode(1);
+  for (int I = 0; I < 16; I++) {
+    if (I % 2)
+      counterFillSet(AC.Nodes[0], I);
+    fillSet(AC.Nodes[1], I);
+  }
+  std::cout << "==Before:==\n";
+  AC.Nodes[0].dump();
+  AC.Nodes[1].dump();
+
+  AC.Nodes[0].mustJoin(AC.Nodes[1]);
+
+  AC.Nodes[1].mustJoin(AC.Nodes[0]);
+  std::cout << "\n==After:==\n";
+  AC.Nodes[1].dump();
+  for (auto Set : AC.Nodes[1].Sets) {
+    for (auto B : Set.second.Associativity) {
+      uint SetNr = Set.first;
+      uint Age = B.first;
+      if (SetNr % 2) {
+        switch (Age) {
+        case 0:
+          EXPECT_TRUE(B.second.Blocks.empty());
+          break;
+        case 1:
+          EXPECT_EQ(B.second.Blocks.front(), 1);
+          break;
+        case 2:
+          EXPECT_EQ(B.second.Blocks.front(), 2);
+          break;
+        case 3:
+          // this test is not very exact the Set 0 with age 3 should contain
+          // (0,3) in arbitrary order
+          EXPECT_EQ(B.second.Blocks.size(), 2);
+          break;
+        default:
+          // should never be reached!
+          EXPECT_TRUE(false);
+        }
+      } else {
+        EXPECT_TRUE(B.second.Blocks.empty());
+      }
+    }
+  }
+  EXPECT_TRUE(AC.Nodes[1] == AC.Nodes[0]);
+}

helper.sh

@@ -11,7 +11,7 @@ config () {
   mkdir build
   cd build
   echo "==== Configuring cmake ===="
-  cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=$LLVM_DIR ../CacheAnalysisPass/
+  cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=/usr ..
   cd ..
   cp build/compile_commands.json compile_commands.json
   echo "==== Done! ===="
@@ -27,7 +27,7 @@ compile () {
 
 run () {
   echo "==== Running $1 ===="
-  opt -load-pass-plugin build/libCacheAnalysisPass.so \
+  opt -load-pass-plugin build/lib/libCacheAnalysisPass.so \
     -passes='lru-misses(function(loop-unroll-and-jam))' \
     test/$1.ll -o /dev/null
   #llvm-dis < out.bc > out.ll

include/AbstractCache.h

@@ -1,4 +1,3 @@
-
 #ifndef ABSTRACHTCACHESTATE_H
 #define ABSTRACHTCACHESTATE_H
 
@@ -11,9 +10,6 @@
 #include <ostream>
 #include <utility>
 
-#include <llvm/IR/BasicBlock.h>
-#include <llvm/Support/raw_ostream.h>
-
 #include "AbstractState.h"
 #include "Address.h"
 #include "ConcreteState.h"
@@ -92,7 +88,7 @@ public: // everything is public, because IDGAF
       }
       Visited[Visitor.first] = true;
     }
-    return false;
+    return Ret;
   }
 
   /**
@@ -104,8 +100,6 @@ public: // everything is public, because IDGAF
   void removeNestedLoops(
       std::list<unsigned int> LoopBodyIn,
       std::map<unsigned int, unsigned int> OrigNodeToUnrolledNode) {
-    unsigned int LoopHead = LoopBodyIn.front();
-    unsigned int LoopTail = LoopBodyIn.back();
     unsigned int NestLoopTail;
     for (unsigned int NodeNr : LoopBodyIn) {
       bool IsLoopHead = false;
@@ -294,34 +288,34 @@ public: // everything is public, because IDGAF
         removeNestedLoops(LoopBody, OrigNodeToUnrolledNode);
 
         if (Verbose && FoundLoopBody) {
-          llvm::outs() << "Found LoopHead @: " << NodeNr << "\n";
+          std::cout << "Found LoopHead @: " << NodeNr << "\n";
-          llvm::outs() << "With LoopTail @: " << LoopTail << "\n";
+          std::cout << "With LoopTail @: " << LoopTail << "\n";
-          llvm::outs() << "With Body: {\n";
+          std::cout << "With Body: {\n";
           int I = 1;
           for (auto Node : LoopBody) {
-            llvm::outs() << Node << ", ";
+            std::cout << Node << ", ";
             if (!(I++ % 5)) {
-              llvm::outs() << "\n";
+              std::cout << "\n";
             }
           }
-          llvm::outs() << "}\n";
+          std::cout << "}\n";
-          llvm::outs() << "Unrolled States: {\n";
+          std::cout << "Unrolled States: {\n";
           I = 1;
           for (auto Node : LoopBody) {
-            llvm::outs() << OrigNodeToUnrolledNode[Node] << ", ";
+            std::cout << OrigNodeToUnrolledNode[Node] << ", ";
             if (!(I++ % 5)) {
-              llvm::outs() << "\n";
+              std::cout << "\n";
             }
           }
-          llvm::outs() << "}\n";
+          std::cout << "}\n";
           I = 1;
-          llvm::outs() << "OrigNodeToUnrolledNode: {\n";
+          std::cout << "OrigNodeToUnrolledNode: {\n";
           for (auto Nr : OrigNodeToUnrolledNode) {
-            llvm::outs() << Nr.first << "->" << Nr.second << ", ";
+            std::cout << Nr.first << "->" << Nr.second << ", ";
             if (!(I++ % 3))
-              llvm::outs() << "\n";
+              std::cout << "\n";
           }
-          llvm::outs() << "}\n";
+          std::cout << "}\n";
         }
       }
     }
@@ -402,19 +396,19 @@ public: // everything is public, because IDGAF
    *
    */
   void dumpEdges() {
-    llvm::outs() << "Dumping Edges:\n";
+    std::cout << "Dumping Edges:\n";
     for (auto const &E : Edges) {
-      llvm::outs() << E.first;
+      std::cout << E.first;
       bool FirstPrint = true;
       for (unsigned int To : E.second) {
         if (FirstPrint) {
-          llvm::outs() << " -> " << To;
+          std::cout << " -> " << To;
           FirstPrint = false;
         } else {
-          llvm::outs() << ", " << To;
+          std::cout << ", " << To;
         }
       }
-      llvm::outs() << "\n";
+      std::cout << "\n";
     }
   }
 
@@ -455,5 +449,6 @@ public: // everything is public, because IDGAF
       Nodes[E.first].dump();
     }
   }
+
 };     // namespace
 #endif // ABSTRACHTCACHESTATE_H

include/AbstractState.h

@@ -12,8 +12,6 @@
 #include <sstream>
 #include <string>
 
-#include <llvm/Support/raw_ostream.h>
-
 #include "Address.h"
 // Forward declarations
 
@@ -103,8 +101,8 @@ public: // everything is public, because IDGAF
   void setUnrolled(unsigned int In) { Unrolled = In; }
 
   bool operator==(AbstractState In) {
-    for (int Index; Index < 16; Index++) {
+    for (int Index = 0; Index < 16; Index++) {
-      for (int Age; Age < 4; Age++) {
+      for (int Age = 0; Age < 4; Age++) {
         for (auto E1 : Sets[Index].Associativity[Age].Blocks) {
           // find E1 in In States Set and Age.
           if (std::find(In.Sets[Index].Associativity[Age].Blocks.begin(),
@@ -228,46 +226,60 @@ public: // everything is public, because IDGAF
       }
     }
     if (Verbose) {
-      llvm::outs() << "Before:\n";
+      std::cout << "Before:\n";
       this->dump();
     }
     // update this with PreAddr
     this->update(PreAddr);
     if (Verbose) {
-      llvm::outs() << "Update Tag: " << PreAddr.Tag << "\n";
+      std::cout << "Update Tag: " << PreAddr.Tag << "\n";
-      llvm::outs() << "Update Set: " << PreAddr.Index << "\n";
+      std::cout << "Update Set: " << PreAddr.Index << "\n";
-      llvm::outs() << "After:\n";
+      std::cout << "After:\n";
       this->dump();
     }
   }
 
-  void dump() {
+    void dumpSet(unsigned int Set) {
-    llvm::outs() << Addr << " {\n";
+    std::cout << Addr << " {\n";
-    llvm::outs() << "Unrolled: " << Unrolled << "\n";
-    llvm::outs() << "Computed: " << Computed << "\n";
-    llvm::outs() << "Predecessors: ";
-    for (auto PreNr : Predecessors) {
-      llvm::outs() << PreNr << " ";
-    }
-    llvm::outs() << "\n";
 
-    llvm::outs() << "Successors: ";
+      std::cout << "Set[" << Set << "]: \n";
-    for (auto SuccNr : Successors) {
+      for (auto EntryPair : this->Sets[Set].Associativity) {
-      llvm::outs() << SuccNr << " ";
+        std::cout << "  Age[" << EntryPair.first << "]: ";
+        for (auto Block : EntryPair.second.Blocks) {
+          std::cout << Block << " ";
+        }
+        std::cout << "\n";
+      }
+    std::cout << "}\n";
+  }
+
+  void dump() {
+    std::cout << Addr << " {\n";
+    std::cout << "Unrolled: " << Unrolled << "\n";
+    std::cout << "Computed: " << Computed << "\n";
+    std::cout << "Predecessors: ";
+    for (auto PreNr : Predecessors) {
+      std::cout << PreNr << " ";
     }
-    llvm::outs() << "\n";
+    std::cout << "\n";
+
+    std::cout << "Successors: ";
+    for (auto SuccNr : Successors) {
+      std::cout << SuccNr << " ";
+    }
+    std::cout << "\n";
 
     for (auto SetPair : Sets) {
-      llvm::outs() << "Set[" << SetPair.first << "]: \n";
+      std::cout << "Set[" << SetPair.first << "]: \n";
       for (auto EntryPair : SetPair.second.Associativity) {
-        llvm::outs() << "  Age[" << EntryPair.first << "]: ";
+        std::cout << "  Age[" << EntryPair.first << "]: ";
         for (auto Block : EntryPair.second.Blocks) {
-          llvm::outs() << Block << " ";
+          std::cout << Block << " ";
         }
-        llvm::outs() << "\n";
+        std::cout << "\n";
       }
     }
-    llvm::outs() << "}\n";
+    std::cout << "}\n";
   }
 };     // namespace
 #endif // STATE_H