Implement tracking of bytecode instruction size and the number of long

instructions generated.

llvm-svn: 14154

include/llvm/Bytecode/Analyzer.h

@@ -55,6 +55,8 @@ struct BytecodeAnalysis {
     ///< the file is more sparse.
   double   globalsDensity;  ///< density of global defs (bytes/definition)
   double   functionDensity; ///< Average density of functions (bytes/function)
+  unsigned instructionSize; ///< Size of instructions in bytes
+  unsigned longInstructions;///< Number of instructions > 4 bytes
   unsigned vbrCount32;      ///< Number of 32-bit vbr values
   unsigned vbrCount64;      ///< Number of 64-bit vbr values
   unsigned vbrCompBytes;    ///< Number of vbr bytes (compressed)
@@ -67,13 +69,15 @@ struct BytecodeAnalysis {
   /// an analysis of a single function.
   struct BytecodeFunctionInfo {
     std::string description;  ///< Function type description
-    std::string name;	      ///< Name of function if it has one
+    std::string name;         ///< Name of function if it has one
     unsigned byteSize;        ///< The size of the function in bytecode bytes
     unsigned numInstructions; ///< The number of instructions in the function
     unsigned numBasicBlocks;  ///< The number of basic blocks in the function
     unsigned numPhis;         ///< Number of Phi Nodes in Instructions
     unsigned numOperands;     ///< The number of operands in the function
     double   density;         ///< Density of function
+    unsigned instructionSize; ///< Size of instructions in bytes
+    unsigned longInstructions;///< Number of instructions > 4 bytes
     unsigned vbrCount32;      ///< Number of 32-bit vbr values
     unsigned vbrCount64;      ///< Number of 64-bit vbr values
     unsigned vbrCompBytes;    ///< Number of vbr bytes (compressed)

lib/Bytecode/Analyzer/Analyzer.cpp

@@ -52,6 +52,8 @@ public:
     bca.fileDensity = 0.0;
     bca.globalsDensity = 0.0;
     bca.functionDensity = 0.0;
+    bca.instructionSize = 0;
+    bca.longInstructions = 0;
     bca.vbrCount32 = 0;
     bca.vbrCount64 = 0;
     bca.vbrCompBytes = 0;
@@ -167,6 +169,8 @@ public:
     currFunc->numPhis = 0;
     currFunc->numOperands = 0;
     currFunc->density = 0.0;
+    currFunc->instructionSize = 0;
+    currFunc->longInstructions = 0;
     currFunc->vbrCount32 = 0;
     currFunc->vbrCount64 = 0;
     currFunc->vbrCompBytes = 0;
@@ -188,9 +192,13 @@ public:
     std::vector<unsigned>& Operands, unsigned Size) {
     bca.numInstructions++;
     bca.numValues++;
+    bca.instructionSize += Size;
+    if (Size > 4 ) bca.longInstructions++;
     bca.numOperands += Operands.size();
     if ( currFunc ) {
       currFunc->numInstructions++;
+      currFunc->instructionSize += Size;
+      if (Size > 4 ) currFunc->longInstructions++;
       if ( Opcode == Instruction::PHI ) currFunc->numPhis++;
     }
     return Instruction::isTerminator(Opcode); 

lib/Bytecode/Analyzer/AnalyzerWrappers.cpp

@@ -249,6 +249,10 @@ void llvm::PrintBytecodeAnalysis(BytecodeAnalysis& bca, std::ostream& Out )
   print(Out, "Number Of Operands",              bca.numOperands);
   print(Out, "Number Of Compaction Tables",     bca.numCmpctnTables);
   print(Out, "Number Of Symbol Tables",         bca.numSymTab);
+  print(Out, "Long Instructions", bca.longInstructions);
+  print(Out, "Instruction Size", bca.instructionSize);
+  print(Out, "Average Instruction Size", 
+    double(bca.instructionSize)/double(bca.numInstructions));
   print(Out, "Maximum Type Slot Number",        bca.maxTypeSlot);
   print(Out, "Maximum Value Slot Number",       bca.maxValueSlot);
   print(Out, "Bytes Thrown To Alignment",       double(bca.numAlignment), 
@@ -304,6 +308,10 @@ void llvm::PrintBytecodeAnalysis(BytecodeAnalysis& bca, std::ostream& Out )
       print(Out, "Type:", I->second.description);
       print(Out, "Byte Size", I->second.byteSize);
       print(Out, "Instructions", I->second.numInstructions);
+      print(Out, "Long Instructions", I->second.longInstructions);
+      print(Out, "Instruction Size", I->second.instructionSize);
+      print(Out, "Average Instruction Size", 
+        double(I->second.instructionSize)/double(I->second.numInstructions));
       print(Out, "Basic Blocks", I->second.numBasicBlocks);
       print(Out, "Operand", I->second.numOperands);
       print(Out, "Function Density", I->second.density);

lib/Bytecode/Reader/Analyzer.cpp

@@ -52,6 +52,8 @@ public:
     bca.fileDensity = 0.0;
     bca.globalsDensity = 0.0;
     bca.functionDensity = 0.0;
+    bca.instructionSize = 0;
+    bca.longInstructions = 0;
     bca.vbrCount32 = 0;
     bca.vbrCount64 = 0;
     bca.vbrCompBytes = 0;
@@ -167,6 +169,8 @@ public:
     currFunc->numPhis = 0;
     currFunc->numOperands = 0;
     currFunc->density = 0.0;
+    currFunc->instructionSize = 0;
+    currFunc->longInstructions = 0;
     currFunc->vbrCount32 = 0;
     currFunc->vbrCount64 = 0;
     currFunc->vbrCompBytes = 0;
@@ -188,9 +192,13 @@ public:
     std::vector<unsigned>& Operands, unsigned Size) {
     bca.numInstructions++;
     bca.numValues++;
+    bca.instructionSize += Size;
+    if (Size > 4 ) bca.longInstructions++;
     bca.numOperands += Operands.size();
     if ( currFunc ) {
       currFunc->numInstructions++;
+      currFunc->instructionSize += Size;
+      if (Size > 4 ) currFunc->longInstructions++;
       if ( Opcode == Instruction::PHI ) currFunc->numPhis++;
     }
     return Instruction::isTerminator(Opcode); 

lib/Bytecode/Reader/AnalyzerWrappers.cpp

@@ -249,6 +249,10 @@ void llvm::PrintBytecodeAnalysis(BytecodeAnalysis& bca, std::ostream& Out )
   print(Out, "Number Of Operands",              bca.numOperands);
   print(Out, "Number Of Compaction Tables",     bca.numCmpctnTables);
   print(Out, "Number Of Symbol Tables",         bca.numSymTab);
+  print(Out, "Long Instructions", bca.longInstructions);
+  print(Out, "Instruction Size", bca.instructionSize);
+  print(Out, "Average Instruction Size", 
+    double(bca.instructionSize)/double(bca.numInstructions));
   print(Out, "Maximum Type Slot Number",        bca.maxTypeSlot);
   print(Out, "Maximum Value Slot Number",       bca.maxValueSlot);
   print(Out, "Bytes Thrown To Alignment",       double(bca.numAlignment), 
@@ -304,6 +308,10 @@ void llvm::PrintBytecodeAnalysis(BytecodeAnalysis& bca, std::ostream& Out )
       print(Out, "Type:", I->second.description);
       print(Out, "Byte Size", I->second.byteSize);
       print(Out, "Instructions", I->second.numInstructions);
+      print(Out, "Long Instructions", I->second.longInstructions);
+      print(Out, "Instruction Size", I->second.instructionSize);
+      print(Out, "Average Instruction Size", 
+        double(I->second.instructionSize)/double(I->second.numInstructions));
       print(Out, "Basic Blocks", I->second.numBasicBlocks);
       print(Out, "Operand", I->second.numOperands);
       print(Out, "Function Density", I->second.density);