[llvm] r252678 - MachineInstr: addRegisterDefReadUndef() => setRegisterDefReadUndef()

[Matthias Braun via llvm-commits]

Author: matze
Date: Tue Nov 10 18:41:58 2015
New Revision: 252678

URL: http://llvm.org/viewvc/llvm-project?rev=252678&view=rev
Log:
MachineInstr: addRegisterDefReadUndef() => setRegisterDefReadUndef()

This way we can not only add but also remove read undef flags.

Modified:
    llvm/trunk/include/llvm/CodeGen/MachineInstr.h
    llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
    llvm/trunk/lib/CodeGen/MachineInstr.cpp

Modified: llvm/trunk/include/llvm/CodeGen/MachineInstr.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/MachineInstr.h?rev=252678&r1=252677&r2=252678&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/MachineInstr.h (original)
+++ llvm/trunk/include/llvm/CodeGen/MachineInstr.h Tue Nov 10 18:41:58 2015
@@ -1063,7 +1063,7 @@ public:
   /// Mark all subregister defs of register @p Reg with the undef flag.
   /// This function is used when we determined to have a subregister def in an
   /// otherwise undefined super register.
-  void addRegisterDefReadUndef(unsigned Reg);
+  void setRegisterDefReadUndef(unsigned Reg, bool IsUndef = true);
 
   /// We have determined MI defines a register. Make sure there is an operand
   /// defining Reg.

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=252678&r1=252677&r2=252678&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Tue Nov 10 18:41:58 2015
@@ -490,7 +490,7 @@ bool LiveIntervals::computeDeadValues(Li
     if (MRI->shouldTrackSubRegLiveness(VReg)) {
       if ((I == LI.begin() || std::prev(I)->end < Def) && !VNI->isPHIDef()) {
         MachineInstr *MI = getInstructionFromIndex(Def);
-        MI->addRegisterDefReadUndef(VReg);
+        MI->setRegisterDefReadUndef(VReg);
         DeadBeforeDef = true;
       }
     }

Modified: llvm/trunk/lib/CodeGen/MachineInstr.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineInstr.cpp?rev=252678&r1=252677&r2=252678&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineInstr.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineInstr.cpp Tue Nov 10 18:41:58 2015
@@ -1933,11 +1933,11 @@ void MachineInstr::clearRegisterDeads(un
   }
 }
 
-void MachineInstr::addRegisterDefReadUndef(unsigned Reg) {
+void MachineInstr::setRegisterDefReadUndef(unsigned Reg, bool IsUndef) {
   for (MachineOperand &MO : operands()) {
     if (!MO.isReg() || !MO.isDef() || MO.getReg() != Reg || MO.getSubReg() == 0)
       continue;
-    MO.setIsUndef();
+    MO.setIsUndef(IsUndef);
   }
 }