Fix for bug reported by Evzen Muller on llvm-commits: make sure to correctly

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

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 0703bdb7bb5310547754b0efec37c23ad8a61001..9fd41fdbd5bff9634772d2e1603aaab314bf342c 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -193,6 +193,12 @@ unsigned X86RegisterInfo::getX86RegNum(unsigned RegNo) {
   case X86::DR7:
     return 7;
 
+  // Pseudo index registers are equivalent to a "none"
+  // scaled index (See Intel Manual 2A, table 2-3)
+  case X86::EIZ:
+  case X86::RIZ:
+    return 4;
+
   default:
     assert(isVirtualRegister(RegNo) && "Unknown physical register!");
     llvm_unreachable("Register allocator hasn't allocated reg correctly yet!");
@@ -456,9 +462,8 @@ bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const {
 bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
   const MachineFrameInfo *MFI = MF.getFrameInfo();
   const Function *F = MF.getFunction();
-  bool requiresRealignment =
-    RealignStack && ((MFI->getMaxAlignment() > StackAlign) ||
-                     F->hasFnAttr(Attribute::StackAlignment));
+  bool requiresRealignment = ((MFI->getMaxAlignment() > StackAlign) ||
+                               F->hasFnAttr(Attribute::StackAlignment));
 
   // FIXME: Currently we don't support stack realignment for functions with
   //        variable-sized allocas.
@@ -470,12 +475,12 @@ bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
   return requiresRealignment && canRealignStack(MF);
 }
 
-bool X86RegisterInfo::hasReservedCallFrame(MachineFunction &MF) const {
+bool X86RegisterInfo::hasReservedCallFrame(const MachineFunction &MF) const {
   return !MF.getFrameInfo()->hasVarSizedObjects();
 }
 
-bool X86RegisterInfo::hasReservedSpillSlot(MachineFunction &MF, unsigned Reg,
-                                           int &FrameIdx) const {
+bool X86RegisterInfo::hasReservedSpillSlot(const MachineFunction &MF,
+                                           unsigned Reg, int &FrameIdx) const {
   if (Reg == FramePtr && hasFP(MF)) {
     FrameIdx = MF.getFrameInfo()->getObjectIndexBegin();
     return true;