[llvm-commits] CVS: llvm/lib/CodeGen/MachineInstr.cpp

[Evan Cheng]

Changes in directory llvm/lib/CodeGen:

MachineInstr.cpp updated: 1.136 -> 1.137
---
Log message:

Move copyKillDeadInfo out-of-line. Add findRegisterUseOperand().

---
Diffs of the changes:  (+31 -0)

 MachineInstr.cpp |   31 +++++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+)


Index: llvm/lib/CodeGen/MachineInstr.cpp
diff -u llvm/lib/CodeGen/MachineInstr.cpp:1.136 llvm/lib/CodeGen/MachineInstr.cpp:1.137
--- llvm/lib/CodeGen/MachineInstr.cpp:1.136	Thu Nov 30 01:08:44 2006
+++ llvm/lib/CodeGen/MachineInstr.cpp	Wed Dec  6 02:27:42 2006
@@ -169,6 +169,37 @@
   }
 }
 
+/// findRegisterUseOperand() - Returns the MachineOperand that is a use of
+/// the specific register or NULL if it is not found.
+MachineOperand *MachineInstr::findRegisterUseOperand(unsigned Reg) {
+  for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
+    MachineOperand &MO = getOperand(i);
+    if (MO.isReg() && MO.isUse() && MO.getReg() == Reg)
+      return &MO;
+  }
+  return NULL;
+}
+  
+/// copyKillDeadInfo - Copies kill / dead operand properties from MI.
+///
+void MachineInstr::copyKillDeadInfo(const MachineInstr *MI) {
+  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+    const MachineOperand &MO = MI->getOperand(i);
+    if (!MO.isReg() || (!MO.isKill() && !MO.isDead()))
+      continue;
+    for (unsigned j = 0, ee = getNumOperands(); j != ee; ++j) {
+      MachineOperand &MOp = getOperand(j);
+      if (!MOp.isIdenticalTo(MO))
+        continue;
+      if (MO.isKill())
+        MOp.setIsKill();
+      else
+        MOp.setIsDead();
+      break;
+    }
+  }
+}
+
 void MachineInstr::dump() const {
   llvm_cerr << "  " << *this;
 }