x86_64: Fix calls to __morestack under the large code model.

[oota-llvm.git] / lib / Target / X86 / X86RegisterInfo.cpp

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 40796546a2adf1954244fbb426f1342ee4cc6a37..09e651cebfb926122011d2d18e96e9c41c6a94ed 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -122,7 +122,7 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
 const TargetRegisterClass*
 X86RegisterInfo::getLargestLegalSuperClass(const TargetRegisterClass *RC) const{
   // Don't allow super-classes of GR8_NOREX.  This class is only used after
-  // extrating sub_8bit_hi sub-registers.  The H sub-registers cannot be copied
+  // extracting sub_8bit_hi sub-registers.  The H sub-registers cannot be copied
   // to the full GR8 register class in 64-bit mode, so we cannot allow the
   // reigster class inflation.
   //
@@ -443,10 +443,8 @@ bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const {
 bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
   const MachineFrameInfo *MFI = MF.getFrameInfo();
   const Function *F = MF.getFunction();
-  unsigned StackAlign = MF.getTarget()
-                            .getSubtargetImpl()
-                            ->getFrameLowering()
-                            ->getStackAlignment();
+  unsigned StackAlign =
+    MF.getSubtarget().getFrameLowering()->getStackAlignment();
   bool requiresRealignment =
     ((MFI->getMaxAlignment() > StackAlign) ||
      F->getAttributes().hasAttribute(AttributeSet::FunctionIndex,
@@ -537,6 +535,14 @@ unsigned X86RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
   return TFI->hasFP(MF) ? FramePtr : StackPtr;
 }
 
+unsigned X86RegisterInfo::getPtrSizedFrameRegister(
+    const MachineFunction &MF) const {
+  unsigned FrameReg = getFrameRegister(MF);
+  if (Subtarget.isTarget64BitILP32())
+    FrameReg = getX86SubSuperRegister(FrameReg, MVT::i32, false);
+  return FrameReg;
+}
+
 namespace llvm {
 unsigned getX86SubSuperRegister(unsigned Reg, MVT::SimpleValueType VT,
                                 bool High) {