Liveness Analysis Pass

[oota-llvm.git] / include / llvm / CodeGen / MachineOperand.h

diff --git a/include/llvm/CodeGen/MachineOperand.h b/include/llvm/CodeGen/MachineOperand.h
index 40f3580bfdb49a9e40d9dd157aa4c44d8cd1a214..c2a0f65666324338aaf9248fd1ebfc478a814ef7 100644 (file)
--- a/include/llvm/CodeGen/MachineOperand.h
+++ b/include/llvm/CodeGen/MachineOperand.h
@@ -56,6 +56,7 @@ public:
     MO_GlobalAddress,          ///< Address of a global value
     MO_BlockAddress,           ///< Address of a basic block
     MO_RegisterMask,           ///< Mask of preserved registers.
+    MO_RegisterLiveOut,        ///< Mask of live-out registers.
     MO_Metadata,               ///< Metadata reference (for debug info)
     MO_MCSymbol                ///< MCSymbol reference (for debug/eh info)
   };
@@ -153,7 +154,7 @@ private:
     const ConstantFP *CFP;    // For MO_FPImmediate.
     const ConstantInt *CI;    // For MO_CImmediate. Integers > 64bit.
     int64_t ImmVal;           // For MO_Immediate.
-    const uint32_t *RegMask;  // For MO_RegisterMask.
+    const uint32_t *RegMask;  // For MO_RegisterMask and MO_RegisterLiveOut.
     const MDNode *MD;         // For MO_Metadata.
     MCSymbol *Sym;            // For MO_MCSymbol
 
@@ -246,6 +247,8 @@ public:
   bool isBlockAddress() const { return OpKind == MO_BlockAddress; }
   /// isRegMask - Tests if this is a MO_RegisterMask operand.
   bool isRegMask() const { return OpKind == MO_RegisterMask; }
+  /// isRegLiveOut - Tests if this is a MO_RegisterLiveOut operand.
+  bool isRegLiveOut() const { return OpKind == MO_RegisterLiveOut; }
   /// isMetadata - Tests if this is a MO_Metadata operand.
   bool isMetadata() const { return OpKind == MO_Metadata; }
   bool isMCSymbol() const { return OpKind == MO_MCSymbol; }
@@ -476,6 +479,12 @@ public:
     return Contents.RegMask;
   }
 
+  /// getRegLiveOut - Returns a bit mask of live-out registers.
+  const uint32_t *getRegLiveOut() const {
+    assert(isRegLiveOut() && "Wrong MachineOperand accessor");
+    return Contents.RegMask;
+  }
+
   const MDNode *getMetadata() const {
     assert(isMetadata() && "Wrong MachineOperand accessor");
     return Contents.MD;
@@ -659,6 +668,12 @@ public:
     Op.Contents.RegMask = Mask;
     return Op;
   }
+  static MachineOperand CreateRegLiveOut(const uint32_t *Mask) {
+    assert(Mask && "Missing live-out register mask");
+    MachineOperand Op(MachineOperand::MO_RegisterLiveOut);
+    Op.Contents.RegMask = Mask;
+    return Op;
+  }
   static MachineOperand CreateMetadata(const MDNode *Meta) {
     MachineOperand Op(MachineOperand::MO_Metadata);
     Op.Contents.MD = Meta;