[llvm-commits] [llvm] r70704 - in /llvm/trunk/lib/Target/MSP430: MSP430ISelLowering.cpp MSP430RegisterInfo.cpp

[Anton Korobeynikov]

Author: asl
Date: Sun May  3 08:00:11 2009
New Revision: 70704

URL: http://llvm.org/viewvc/llvm-project?rev=70704&view=rev
Log:
Provide set of reserved registers

Modified:
    llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp
    llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp

Modified: llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp?rev=70704&r1=70703&r2=70704&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430ISelLowering.cpp Sun May  3 08:00:11 2009
@@ -80,8 +80,8 @@
 /// generate load operations for arguments places on the stack.
 // FIXME: struct return stuff
 // FIXME: varargs
-SDValue MSP430TargetLowering:: LowerCCCArguments(SDValue Op,
-                                                 SelectionDAG &DAG) {
+SDValue MSP430TargetLowering::LowerCCCArguments(SDValue Op,
+                                                SelectionDAG &DAG) {
   MachineFunction &MF = DAG.getMachineFunction();
   MachineFrameInfo *MFI = MF.getFrameInfo();
   MachineRegisterInfo &RegInfo = MF.getRegInfo();
@@ -193,8 +193,8 @@
     Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
                              Op.getOperand(i*2+1), Flag);
 
-    // guarantee that all emitted copies are
-    // stuck together, avoiding something bad
+    // Guarantee that all emitted copies are stuck together,
+    // avoiding something bad.
     Flag = Chain.getValue(1);
   }
 

Modified: llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp?rev=70704&r1=70703&r2=70704&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430RegisterInfo.cpp Sun May  3 08:00:11 2009
@@ -38,7 +38,19 @@
 
 BitVector
 MSP430RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
-  assert(0 && "Not implemented yet!");
+  BitVector Reserved(getNumRegs());
+
+  // Mark 4 special registers as reserved.
+  Reserved.set(MSP430::PC);
+  Reserved.set(MSP430::SP);
+  Reserved.set(MSP430::SR);
+  Reserved.set(MSP430::CG);
+
+  // Mark frame pointer as reserved if needed.
+  if (hasFP(MF))
+    Reserved.set(MSP430::FP);
+
+  return Reserved;
 }
 
 bool MSP430RegisterInfo::hasFP(const MachineFunction &MF) const {