Remove/fix invalid README entries. The well thought out strcpy function doesn't retur...

[oota-llvm.git] / lib / CodeGen / TargetInstrInfoImpl.cpp

diff --git a/lib/CodeGen/TargetInstrInfoImpl.cpp b/lib/CodeGen/TargetInstrInfoImpl.cpp
index 56cb4b19b8cd0362c334f8dc5b26677f18a2fa9a..baad14c5c762331b99ea260ea5213fa57bd12003 100644 (file)
--- a/lib/CodeGen/TargetInstrInfoImpl.cpp
+++ b/lib/CodeGen/TargetInstrInfoImpl.cpp
@@ -22,8 +22,9 @@
 #include "llvm/CodeGen/MachineInstrBuilder.h"
 #include "llvm/CodeGen/MachineMemOperand.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
-#include "llvm/CodeGen/PostRAHazardRecognizer.h"
+#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
 #include "llvm/CodeGen/PseudoSourceValue.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
@@ -134,7 +135,7 @@ bool TargetInstrInfoImpl::PredicateInstruction(MachineInstr *MI,
   const TargetInstrDesc &TID = MI->getDesc();
   if (!TID.isPredicable())
     return false;
-  
+
   for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
     if (TID.OpInfo[i].isPredicate()) {
       MachineOperand &MO = MI->getOperand(i);
@@ -177,19 +178,6 @@ MachineInstr *TargetInstrInfoImpl::duplicate(MachineInstr *Orig,
   return MF.CloneMachineInstr(Orig);
 }
 
-unsigned
-TargetInstrInfoImpl::GetFunctionSizeInBytes(const MachineFunction &MF) const {
-  unsigned FnSize = 0;
-  for (MachineFunction::const_iterator MBBI = MF.begin(), E = MF.end();
-       MBBI != E; ++MBBI) {
-    const MachineBasicBlock &MBB = *MBBI;
-    for (MachineBasicBlock::const_iterator I = MBB.begin(),E = MBB.end();
-         I != E; ++I)
-      FnSize += GetInstSizeInBytes(I);
-  }
-  return FnSize;
-}
-
 // If the COPY instruction in MI can be folded to a stack operation, return
 // the register class to use.
 static const TargetRegisterClass *canFoldCopy(const MachineInstr *MI,
@@ -253,51 +241,44 @@ TargetInstrInfo::foldMemoryOperand(MachineBasicBlock::iterator MI,
   MachineFunction &MF = *MBB->getParent();
 
   // Ask the target to do the actual folding.
-  MachineInstr *NewMI = foldMemoryOperandImpl(MF, MI, Ops, FI);
+  if (MachineInstr *NewMI = foldMemoryOperandImpl(MF, MI, Ops, FI)) {
+    // Add a memory operand, foldMemoryOperandImpl doesn't do that.
+    assert((!(Flags & MachineMemOperand::MOStore) ||
+            NewMI->getDesc().mayStore()) &&
+           "Folded a def to a non-store!");
+    assert((!(Flags & MachineMemOperand::MOLoad) ||
+            NewMI->getDesc().mayLoad()) &&
+           "Folded a use to a non-load!");
+    const MachineFrameInfo &MFI = *MF.getFrameInfo();
+    assert(MFI.getObjectOffset(FI) != -1);
+    MachineMemOperand *MMO =
+      MF.getMachineMemOperand(
+                    MachinePointerInfo(PseudoSourceValue::getFixedStack(FI)),
+                              Flags, MFI.getObjectSize(FI),
+                              MFI.getObjectAlignment(FI));
+    NewMI->addMemOperand(MF, MMO);
 
-  // Straight COPY may fold as load/store.
-  if (!NewMI) {
-    if (!MI->isCopy() || Ops.size() != 1)
-      return 0;
-
-    const TargetRegisterClass *RC = canFoldCopy(MI, Ops[0]);
-    if (!RC)
-      return 0;
-
-    const MachineOperand &MO = MI->getOperand(1-Ops[0]);
-    MachineBasicBlock::iterator Pos = MI;
-    const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
-
-    if (Flags == MachineMemOperand::MOStore)
-      storeRegToStackSlot(*MBB, Pos, MO.getReg(), MO.isKill(), FI, RC, TRI);
-    else
-      loadRegFromStackSlot(*MBB, Pos, MO.getReg(), FI, RC, TRI);
-
-    NewMI = --Pos;
-  } else {
     // FIXME: change foldMemoryOperandImpl semantics to also insert NewMI.
-    NewMI = MBB->insert(MI, NewMI);
+    return MBB->insert(MI, NewMI);
   }
 
-  if (!NewMI) return 0;
+  // Straight COPY may fold as load/store.
+  if (!MI->isCopy() || Ops.size() != 1)
+    return 0;
 
+  const TargetRegisterClass *RC = canFoldCopy(MI, Ops[0]);
+  if (!RC)
+    return 0;
 
-  assert((!(Flags & MachineMemOperand::MOStore) ||
-          NewMI->getDesc().mayStore()) &&
-         "Folded a def to a non-store!");
-  assert((!(Flags & MachineMemOperand::MOLoad) ||
-          NewMI->getDesc().mayLoad()) &&
-         "Folded a use to a non-load!");
-  const MachineFrameInfo &MFI = *MF.getFrameInfo();
-  assert(MFI.getObjectOffset(FI) != -1);
-  MachineMemOperand *MMO =
-    MF.getMachineMemOperand(PseudoSourceValue::getFixedStack(FI),
-                            Flags, /*Offset=*/0,
-                            MFI.getObjectSize(FI),
-                            MFI.getObjectAlignment(FI));
-  NewMI->addMemOperand(MF, MMO);
+  const MachineOperand &MO = MI->getOperand(1-Ops[0]);
+  MachineBasicBlock::iterator Pos = MI;
+  const TargetRegisterInfo *TRI = MF.getTarget().getRegisterInfo();
 
-  return NewMI;
+  if (Flags == MachineMemOperand::MOStore)
+    storeRegToStackSlot(*MBB, Pos, MO.getReg(), MO.isKill(), FI, RC, TRI);
+  else
+    loadRegFromStackSlot(*MBB, Pos, MO.getReg(), FI, RC, TRI);
+  return --Pos;
 }
 
 /// foldMemoryOperand - Same as the previous version except it allows folding
@@ -435,23 +416,6 @@ bool TargetInstrInfoImpl::isSchedulingBoundary(const MachineInstr *MI,
 
 // Default implementation of CreateTargetPostRAHazardRecognizer.
 ScheduleHazardRecognizer *TargetInstrInfoImpl::
-CreateTargetPostRAHazardRecognizer(const InstrItineraryData &II) const {
-  return (ScheduleHazardRecognizer *)new PostRAHazardRecognizer(II);
-}
-
-// Default implementation of copyPhysReg using copyRegToReg.
-void TargetInstrInfoImpl::copyPhysReg(MachineBasicBlock &MBB,
-                                      MachineBasicBlock::iterator MI,
-                                      DebugLoc DL,
-                                      unsigned DestReg, unsigned SrcReg,
-                                      bool KillSrc) const {
-  assert(TargetRegisterInfo::isPhysicalRegister(DestReg));
-  assert(TargetRegisterInfo::isPhysicalRegister(SrcReg));
-  const TargetRegisterInfo *TRI = MBB.getParent()->getTarget().getRegisterInfo();
-  const TargetRegisterClass *DRC = TRI->getPhysicalRegisterRegClass(DestReg);
-  const TargetRegisterClass *SRC = TRI->getPhysicalRegisterRegClass(SrcReg);
-  if (!copyRegToReg(MBB, MI, DestReg, SrcReg, DRC, SRC, DL))
-    llvm_unreachable("Cannot emit physreg copy instruction");
-  if (KillSrc)
-    llvm::prior(MI)->addRegisterKilled(SrcReg, TRI, true);
+CreateTargetPostRAHazardRecognizer(const InstrItineraryData *II) const {
+  return (ScheduleHazardRecognizer *)new ScoreboardHazardRecognizer(II);
 }