For now, don't split live intervals around x87 stack register barriers. FpGET_ST0_80...

[oota-llvm.git] / lib / Target / TargetInstrInfo.cpp

diff --git a/lib/Target/TargetInstrInfo.cpp b/lib/Target/TargetInstrInfo.cpp
index cc637ed4063926002d2cacf29638cc18714c2004..10a5cdb6247a9fb44aa02a660203960c72d6f2e1 100644 (file)
--- a/lib/Target/TargetInstrInfo.cpp
+++ b/lib/Target/TargetInstrInfo.cpp
@@ -2,8 +2,8 @@
 //
 //                     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 is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -12,65 +12,39 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/Constant.h"
 #include "llvm/DerivedTypes.h"
 using namespace llvm;
 
-namespace llvm {
-  // External object describing the machine instructions Initialized only when
-  // the TargetMachine class is created and reset when that class is destroyed.
-  //
-  // FIXME: UGLY SPARCV9 HACK!
-  const TargetInstrDescriptor* TargetInstrDescriptors = 0;
-}
-
-TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
-                                 unsigned numOpcodes)
-  : desc(Desc), NumOpcodes(numOpcodes) {
-  // FIXME: TargetInstrDescriptors should not be global
-  assert(TargetInstrDescriptors == NULL && desc != NULL
-         && "TargetMachine data structure corrupt; maybe you tried to create another TargetMachine? (only one may exist in a program)");
-  TargetInstrDescriptors = desc; // initialize global variable
-}
-
-TargetInstrInfo::~TargetInstrInfo() {
-  TargetInstrDescriptors = NULL; // reset global variable
-}
-
 /// findTiedToSrcOperand - Returns the operand that is tied to the specified
 /// dest operand. Returns -1 if there isn't one.
-int
-TargetInstrInfo::findTiedToSrcOperand(MachineOpCode Opc, unsigned OpNum) const {
-  for (unsigned i = 0, e = getNumOperands(Opc); i != e; ++i) {
+int TargetInstrDesc::findTiedToSrcOperand(unsigned OpNum) const {
+  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
     if (i == OpNum)
       continue;
-    int ti = getOperandConstraint(Opc, i, TIED_TO);
-    if (ti == (int)OpNum)
+    if (getOperandConstraint(i, TOI::TIED_TO) == (int)OpNum)
       return i;
   }
   return -1;
 }
 
 
-// commuteInstruction - The default implementation of this method just exchanges
-// operand 1 and 2.
-MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
-  assert(MI->getOperand(1).isRegister() && MI->getOperand(2).isRegister() &&
-         "This only knows how to commute register operands so far");
-  unsigned Reg1 = MI->getOperand(1).getReg();
-  unsigned Reg2 = MI->getOperand(2).getReg();
-  bool Reg1IsKill = MI->getOperand(1).isKill();
-  bool Reg2IsKill = MI->getOperand(2).isKill();
-  MI->getOperand(2).setReg(Reg1);
-  MI->getOperand(1).setReg(Reg2);
-  if (Reg1IsKill)
-    MI->getOperand(2).setIsKill();
-  else
-    MI->getOperand(2).unsetIsKill();
-  if (Reg2IsKill)
-    MI->getOperand(1).setIsKill();
-  else
-    MI->getOperand(1).unsetIsKill();
-  return MI;
+TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
+                                 unsigned numOpcodes)
+  : Descriptors(Desc), NumOpcodes(numOpcodes) {
+}
+
+TargetInstrInfo::~TargetInstrInfo() {
+}
+
+bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
+  const TargetInstrDesc &TID = MI->getDesc();
+  if (!TID.isTerminator()) return false;
+  
+  // Conditional branch is a special case.
+  if (TID.isBranch() && !TID.isBarrier())
+    return true;
+  if (!TID.isPredicable())
+    return true;
+  return !isPredicated(MI);
 }