X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FVMCore%2FInstruction.cpp;h=5ddf28435406b563a55e6b4ff141d3d44eb40c08;hb=e5828f1fa7c2691f747f5060ce11b8e55cea03ab;hp=ce1423a8631c636f69186e69666aa3d7c6ac732c;hpb=8f77daef04355c00b78b645f5aae5694e7a8b631;p=oota-llvm.git

diff --git a/lib/VMCore/Instruction.cpp b/lib/VMCore/Instruction.cpp
index ce1423a8631..5ddf2843540 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.
 //
@@ -8,15 +15,20 @@
 #include "llvm/SymbolTable.h"
 #include "llvm/Type.h"
 #include "Support/LeakDetector.h"
+using namespace llvm;
 
-Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
-                         Instruction *InsertBefore)
-  : User(ty, Value::InstructionVal, Name) {
-  Parent = 0;
-  iType = it;
-
+void Instruction::init()
+{
   // Make sure that we get added to a basicblock
   LeakDetector::addGarbageObject(this);
+}
+
+Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
+                         Instruction *InsertBefore)
+  : User(ty, Value::InstructionVal, Name),
+    Parent(0),
+    iType(it) {
+  init();
 
   // If requested, insert this instruction into a basic block...
   if (InsertBefore) {
@@ -26,14 +38,26 @@ Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
   }
 }
 
+Instruction::Instruction(const Type *ty, unsigned it, const std::string &Name,
+                         BasicBlock *InsertAtEnd)
+  : User(ty, Value::InstructionVal, Name),
+    Parent(0),
+    iType(it) {
+  init();
+
+  // append this instruction into the basic block
+  assert(InsertAtEnd && "Basic block to append to may not be NULL!");
+  InsertAtEnd->getInstList().push_back(this);
+}
+
 void Instruction::setParent(BasicBlock *P) {
-  if (getParent())
-    LeakDetector::addGarbageObject(this);
+  if (getParent()) {
+    if (!P) LeakDetector::addGarbageObject(this);
+  } else {
+    if (P) LeakDetector::removeGarbageObject(this);
+  }
 
   Parent = P;
-
-  if (getParent())
-    LeakDetector::removeGarbageObject(this);
 }
 
 // Specialize setName to take care of symbol table majik
@@ -56,6 +80,7 @@ const char *Instruction::getOpcodeName(unsigned OpCode) {
   case Br:     return "br";
   case Switch: return "switch";
   case Invoke: return "invoke";
+  case Unwind: return "unwind";
     
   // Standard binary operators...
   case Add: return "add";
@@ -86,12 +111,14 @@ 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 Select:  return "select";
   case Call:    return "call";
   case Shl:     return "shl";
   case Shr:     return "shr";
-  case VarArg:  return "va_arg";
+  case VANext:  return "vanext";
+  case VAArg:   return "vaarg";
 
   default: return "<Invalid operator> ";
   }
@@ -118,7 +145,7 @@ bool Instruction::isAssociative(unsigned Opcode, const Type *Ty) {
 
 /// isCommutative - Return true if the instruction is commutative:
 ///
-///   Commutative operators satistify: (x op y) === (y op x)
+///   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.
@@ -137,3 +164,36 @@ bool Instruction::isCommutative(unsigned op) {
     return false;
   }
 }
+
+/// isRelational - Return true if the instruction is a Set* instruction:
+///
+bool Instruction::isRelational(unsigned op) {
+  switch (op) {
+  case SetEQ:
+  case SetNE:
+  case SetLT:
+  case SetGT:
+  case SetLE:
+  case SetGE:
+    return true;
+  }
+  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;
+  }
+}