Implement "AsCheapAsAMove" for some obviously cheap instructions: xor and the

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

diff --git a/lib/Target/TargetInstrInfo.cpp b/lib/Target/TargetInstrInfo.cpp
index d8d1578c72def0ce2e21f7e5461fe46ace0c3cc8..10a5cdb6247a9fb44aa02a660203960c72d6f2e1 100644 (file)
--- a/lib/Target/TargetInstrInfo.cpp
+++ b/lib/Target/TargetInstrInfo.cpp
@@ -18,8 +18,8 @@ using namespace llvm;
 
 /// findTiedToSrcOperand - Returns the operand that is tied to the specified
 /// dest operand. Returns -1 if there isn't one.
-int TargetInstrDescriptor::findTiedToSrcOperand(unsigned OpNum) const {
-  for (unsigned i = 0, e = numOperands; i != e; ++i) {
+int TargetInstrDesc::findTiedToSrcOperand(unsigned OpNum) const {
+  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
     if (i == OpNum)
       continue;
     if (getOperandConstraint(i, TOI::TIED_TO) == (int)OpNum)
@@ -29,23 +29,22 @@ int TargetInstrDescriptor::findTiedToSrcOperand(unsigned OpNum) const {
 }
 
 
-TargetInstrInfo::TargetInstrInfo(const TargetInstrDescriptor* Desc,
+TargetInstrInfo::TargetInstrInfo(const TargetInstrDesc* Desc,
                                  unsigned numOpcodes)
-  : desc(Desc), NumOpcodes(numOpcodes) {
+  : Descriptors(Desc), NumOpcodes(numOpcodes) {
 }
 
 TargetInstrInfo::~TargetInstrInfo() {
 }
 
 bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
-  const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
-  if (TID->Flags & M_TERMINATOR_FLAG) {
-    // Conditional branch is a special case.
-    if ((TID->Flags & M_BRANCH_FLAG) != 0 && (TID->Flags & M_BARRIER_FLAG) == 0)
-      return true;
-    if ((TID->Flags & M_PREDICABLE) == 0)
-      return true;
-    return !isPredicated(MI);
-  }
-  return false;
+  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);
 }