X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FInstruction.cpp;h=b72656bdc232bee0490fc076ca063ae68b39f4c5;hb=b576c94c15af9a440f69d9d03c2afead7971118c;hp=3bc642b6376d01d32755c5e016a9721355c3f180;hpb=c105645c16f77ee20b853baf717073ad393dd4aa;p=oota-llvm.git

diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp
index 3bc642b6376..b72656bdc23 100644
--- a/lib/VMCore/Instruction.cpp
+++ b/lib/VMCore/Instruction.cpp
@@ -1,4 +1,11 @@
-//===-- Instruction.cpp - Implement the Instruction class --------*- C++ -*--=//
+//===-- Instruction.cpp - Implement the Instruction class -----------------===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
 //
 // This file implements the Instruction class for the VMCore library.
 //
@@ -7,37 +14,57 @@
 #include "llvm/Function.h"
 #include "llvm/SymbolTable.h"
 #include "llvm/Type.h"
+#include "Support/LeakDetector.h"
 
-Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name) 
+Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
+                         Instruction *InsertBefore)
   : User(ty, Value::InstructionVal, Name) {
   Parent = 0;
   iType = it;
+
+  // Make sure that we get added to a basicblock
+  LeakDetector::addGarbageObject(this);
+
+  // If requested, insert this instruction into a basic block...
+  if (InsertBefore) {
+    assert(InsertBefore->getParent() &&
+           "Instruction to insert before is not in a basic block!");
+    InsertBefore->getParent()->getInstList().insert(InsertBefore, this);
+  }
+}
+
+void Instruction::setParent(BasicBlock *P) {
+  if (getParent())
+    LeakDetector::addGarbageObject(this);
+
+  Parent = P;
+
+  if (getParent())
+    LeakDetector::removeGarbageObject(this);
 }
 
 // Specialize setName to take care of symbol table majik
 void Instruction::setName(const std::string &name, SymbolTable *ST) {
   BasicBlock *P = 0; Function *PP = 0;
   assert((ST == 0 || !getParent() || !getParent()->getParent() || 
-	  ST == getParent()->getParent()->getSymbolTable()) &&
+	  ST == &getParent()->getParent()->getSymbolTable()) &&
 	 "Invalid symtab argument!");
   if ((P = getParent()) && (PP = P->getParent()) && hasName())
-    PP->getSymbolTable()->remove(this);
+    PP->getSymbolTable().remove(this);
   Value::setName(name);
-  if (PP && hasName()) PP->getSymbolTableSure()->insert(this);
+  if (PP && hasName()) PP->getSymbolTable().insert(this);
 }
 
 
 const char *Instruction::getOpcodeName(unsigned OpCode) {
   switch (OpCode) {
   // Terminators
-  case Ret: return "ret";
-  case Br: return "br";
+  case Ret:    return "ret";
+  case Br:     return "br";
   case Switch: return "switch";
   case Invoke: return "invoke";
+  case Unwind: return "unwind";
     
-  // Standard unary operators...
-  case Not: return "not";
-
   // Standard binary operators...
   case Add: return "add";
   case Sub: return "sub";
@@ -67,14 +94,72 @@ const char *Instruction::getOpcodeName(unsigned OpCode) {
   case GetElementPtr: return "getelementptr";
     
   // Other instructions...
-  case PHINode: return "phi";
+  case PHI:     return "phi";
   case Cast:    return "cast";
   case Call:    return "call";
   case Shl:     return "shl";
   case Shr:     return "shr";
-    
+  case VANext:  return "vanext";
+  case VAArg:   return "vaarg";
+
   default: return "<Invalid operator> ";
   }
   
   return 0;
 }
+
+
+/// isAssociative - Return true if the instruction is associative:
+///
+///   Associative operators satisfy:  x op (y op z) === (x op y) op z)
+///
+/// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when not
+/// applied to floating point types.
+///
+bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) {
+  if (Opcode == Add || Opcode == Mul ||
+      Opcode == And || Opcode == Or || Opcode == Xor) {
+    // Floating point operations do not associate!
+    return !Ty->isFloatingPoint();
+  }
+  return 0;
+}
+
+/// isCommutative - Return true if the instruction is commutative:
+///
+///   Commutative operators satisfy: (x op y) === (y op x)
+///
+/// In LLVM, these are the associative operators, plus SetEQ and SetNE, when
+/// applied to any type.
+///
+bool Instruction::isCommutative(unsigned op) {
+  switch (op) {
+  case Add:
+  case Mul:
+  case And: 
+  case Or:
+  case Xor:
+  case SetEQ:
+  case SetNE:
+    return true;
+  default:
+    return false;
+  }
+}
+
+
+/// isTrappingInstruction - Return true if the instruction may trap.
+///
+bool Instruction::isTrapping(unsigned op) {
+  switch(op) {
+  case Div:
+  case Rem:
+  case Load:
+  case Store:
+  case Call:
+  case Invoke:
+    return true;
+  default:
+    return false;
+  }
+}