Temporarily reverting r56683. This is causing a failure during the build of llvm-gcc:

/Volumes/Gir/devel/llvm/clean/llvm-gcc.obj/./gcc/xgcc -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.obj/./gcc/ -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/bin/ -B/Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/lib/ -isystem /Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/include -isystem /Volumes/Gir/devel/llvm/clean/llvm-gcc.install/i386-apple-darwin9.5.0/sys-include -mmacosx-version-min=10.4 -O2  -O2 -g -O2  -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED  -I. -I. -I../../llvm-gcc.src/gcc -I../../llvm-gcc.src/gcc/. -I../../llvm-gcc.src/gcc/../include -I./../intl -I../../llvm-gcc.src/gcc/../libcpp/include  -I../../llvm-gcc.src/gcc/../libdecnumber -I../libdecnumber -I/Volumes/Gir/devel/llvm/clean/llvm.obj/include -I/Volumes/Gir/devel/llvm/clean/llvm.src/include -fexceptions -fvisibility=hidden -DHIDE_EXPORTS -c ../../llvm-gcc.src/gcc/unwind-dw2-fde-darwin.c -o libgcc/./unwind-dw2-fde-darwin.o
Assertion failed: (TargetRegisterInfo::isVirtualRegister(regA) && TargetRegisterInfo::isVirtualRegister(regB) && "cannot update physical register live information"), function runOnMachineFunction, file /Volumes/Gir/devel/llvm/clean/llvm.src/lib/CodeGen/TwoAddressInstructionPass.cpp, line 311.
../../llvm-gcc.src/gcc/unwind-dw2.c:1527: internal compiler error: Abort trap
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://developer.apple.com/bugreporter> for instructions.
{standard input}:3521:non-relocatable subtraction expression, "_dwarf_reg_size_table" minus "L20$pb"
{standard input}:3521:symbol: "_dwarf_reg_size_table" can't be undefined in a subtraction expression
{standard input}:3520:non-relocatable subtraction expression, "_dwarf_reg_size_table" minus "L20$pb"
...

llvm-svn: 56703

include/llvm/CodeGen/MachineFrameInfo.h

@@ -118,10 +118,6 @@ class MachineFrameInfo {
   ///
   bool HasVarSizedObjects;
 
-  /// FrameAddressTaken - This boolean keeps track of whether there is a call
-  /// to builtin @llvm.frameaddress.
-  bool FrameAddressTaken;
-
   /// StackSize - The prolog/epilog code inserter calculates the final stack
   /// offsets for all of the fixed size objects, updating the Objects list
   /// above.  It then updates StackSize to contain the number of bytes that need
@@ -178,7 +174,6 @@ public:
   MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) {
     StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0;
     HasVarSizedObjects = false;
-    FrameAddressTaken = false;
     HasCalls = false;
     MaxCallFrameSize = 0;
     MMI = 0;
@@ -195,12 +190,6 @@ public:
   ///
   bool hasVarSizedObjects() const { return HasVarSizedObjects; }
 
-  /// isFrameAddressTaken - This method may be called any time after instruction
-  /// selection is complete to determine if there is a call to
-  /// @llvm.frameaddress in this function.
-  bool isFrameAddressTaken() const { return FrameAddressTaken; }
-  void setFrameAddressIsTaken(bool T) { FrameAddressTaken = T; }
-
   /// getObjectIndexBegin - Return the minimum frame object index...
   ///
   int getObjectIndexBegin() const { return -NumFixedObjects; }

lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp

@@ -3483,13 +3483,10 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     setValue(&I, DAG.getNode(ISD::RETURNADDR, TLI.getPointerTy(),
                              getValue(I.getOperand(1))));
     return 0;
-  case Intrinsic::frameaddress: {
-    MachineFrameInfo *MFI = CurMBB->getParent()->getFrameInfo();
-    MFI->setFrameAddressIsTaken(true);
+  case Intrinsic::frameaddress:
     setValue(&I, DAG.getNode(ISD::FRAMEADDR, TLI.getPointerTy(),
                              getValue(I.getOperand(1))));
     return 0;
-  }
   case Intrinsic::setjmp:
     return "_setjmp"+!TLI.usesUnderscoreSetJmp();
     break;

lib/Target/ARM/ARMRegisterInfo.cpp

@@ -209,9 +209,7 @@ ARMRegisterInfo::requiresRegisterScavenging(const MachineFunction &MF) const {
 /// or if frame pointer elimination is disabled.
 ///
 bool ARMRegisterInfo::hasFP(const MachineFunction &MF) const {
-  const MachineFrameInfo *MFI = MF.getFrameInfo();
-  return NoFramePointerElim || MFI->hasVarSizedObjects() ||
-    MFI->isFrameAddressTaken();
+  return NoFramePointerElim || MF.getFrameInfo()->hasVarSizedObjects();
 }
 
 // hasReservedCallFrame - Under normal circumstances, when a frame pointer is

lib/Target/Alpha/AlphaRegisterInfo.cpp

@@ -104,7 +104,7 @@ BitVector AlphaRegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 //
 bool AlphaRegisterInfo::hasFP(const MachineFunction &MF) const {
   const MachineFrameInfo *MFI = MF.getFrameInfo();
-  return MFI->hasVarSizedObjects() || MFI->isFrameAddressTaken();
+  return MFI->hasVarSizedObjects();
 }
 
 void AlphaRegisterInfo::

lib/Target/CellSPU/SPURegisterInfo.cpp

@@ -294,8 +294,7 @@ BitVector SPURegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 //
 static bool needsFP(const MachineFunction &MF) {
   const MachineFrameInfo *MFI = MF.getFrameInfo();
-  return NoFramePointerElim || MFI->hasVarSizedObjects() ||
-    MFI->isFrameAddressTaken();
+  return NoFramePointerElim || MFI->hasVarSizedObjects();
 }
 
 //--------------------------------------------------------------------------

lib/Target/IA64/IA64RegisterInfo.cpp

@@ -75,9 +75,7 @@ BitVector IA64RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
 // if frame pointer elimination is disabled.
 //
 bool IA64RegisterInfo::hasFP(const MachineFunction &MF) const {
-  const MachineFrameInfo *MFI = MF.getFrameInfo();
-  return NoFramePointerElim || MFI->hasVarSizedObjects() ||
-    MFI->isFrameAddressTaken();
+  return NoFramePointerElim || MF.getFrameInfo()->hasVarSizedObjects();
 }
 
 void IA64RegisterInfo::

lib/Target/Mips/MipsRegisterInfo.cpp

@@ -324,9 +324,7 @@ void MipsRegisterInfo::adjustMipsStackFrame(MachineFunction &MF) const
 // if frame pointer elimination is disabled.
 bool MipsRegisterInfo::
 hasFP(const MachineFunction &MF) const {
-  const MachineFrameInfo *MFI = MF.getFrameInfo();
-  return NoFramePointerElim || MFI->hasVarSizedObjects() ||
-    MFI->isFrameAddressTaken();
+  return (NoFramePointerElim || MF.getFrameInfo()->hasVarSizedObjects());
 }
 
 // This function eliminate ADJCALLSTACKDOWN, 

lib/Target/PowerPC/PPCRegisterInfo.cpp

@@ -333,7 +333,6 @@ PPCRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const {
 static bool needsFP(const MachineFunction &MF) {
   const MachineFrameInfo *MFI = MF.getFrameInfo();
   return NoFramePointerElim || MFI->hasVarSizedObjects() ||
-    MFI->isFrameAddressTaken() ||
     (PerformTailCallOpt && MF.getInfo<PPCFunctionInfo>()->hasFastCall());
 }
 

lib/Target/X86/X86ISelLowering.cpp

@@ -5645,13 +5645,13 @@ SDValue X86TargetLowering::LowerRETURNADDR(SDValue Op, SelectionDAG &DAG) {
 }
 
 SDValue X86TargetLowering::LowerFRAMEADDR(SDValue Op, SelectionDAG &DAG) {
-  unsigned Depth = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
-  unsigned FrameReg = Subtarget->is64Bit() ? X86::RBP : X86::EBP;
-  SDValue FrameAddr = DAG.getRegister(FrameReg, getPointerTy());
-  while (Depth--)
-    FrameAddr = DAG.getLoad(getPointerTy(), DAG.getEntryNode(), FrameAddr,
-                            NULL, 0);
-  return FrameAddr;
+  // Depths > 0 not supported yet!
+  if (cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue() > 0)
+    return SDValue();
+
+  SDValue RetAddrFI = getReturnAddressFrameIndex(DAG);
+  return DAG.getNode(ISD::SUB, getPointerTy(), RetAddrFI,
+                     DAG.getIntPtrConstant(TD->getPointerSize()));
 }
 
 SDValue X86TargetLowering::LowerFRAME_TO_ARGS_OFFSET(SDValue Op,

lib/Target/X86/X86RegisterInfo.cpp

@@ -299,7 +299,6 @@ bool X86RegisterInfo::hasFP(const MachineFunction &MF) const {
   return (NoFramePointerElim ||
           needsStackRealignment(MF) ||
           MFI->hasVarSizedObjects() ||
-          MFI->isFrameAddressTaken() ||
           MF.getInfo<X86MachineFunctionInfo>()->getForceFramePointer() ||
           (MMI && MMI->callsUnwindInit()));
 }

test/CodeGen/X86/x86-64-frameaddr.ll

@@ -1,6 +1,7 @@
-; RUN: llvm-as < %s | llc -march=x86-64 | grep movq | grep rbp
+; RUN: llvm-as < %s | llc -march=x86-64 | grep {leaq	-8(%rsp), %rax}
+@llvm.noinline = appending global [1 x i8*] [ i8* bitcast (i64* ()* @stack_end_address to i8*) ], section "llvm.metadata"
 
-define i64* @stack_end_address() nounwind  {
+define internal i64* @stack_end_address() nounwind  {
 entry:
 	tail call i8* @llvm.frameaddress( i32 0 )
 	bitcast i8* %0 to i64*

test/CodeGen/X86/x86-frameaddr.ll

@@ -1,4 +1,5 @@
 ; RUN: llvm-as < %s | llc -march=x86 | grep mov | grep ebp
+; XFAIL: *
 
 define i8* @t() nounwind {
 entry:

test/CodeGen/X86/x86-frameaddr2.ll

@@ -1,4 +1,5 @@
 ; RUN: llvm-as < %s | llc -march=x86 | grep mov | count 3
+; XFAIL: *
 
 define i8* @t() nounwind {
 entry: