- Remove calls to copyKillDeadInfo which is an N^2 function. Instead, propagate kill / dead markers as new instructions are constructed in foldMemoryOperand, convertToThressAddress, etc.

- Also remove LiveVariables::instructionChanged, etc. Replace all calls with cheaper calls which update VarInfo kill list.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53097 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 7 deletions

diff --git a/lib/Target/Sparc/SparcInstrInfo.cpp b/lib/Target/Sparc/SparcInstrInfo.cpp
index 79fc912919..67df87b5f0 100644
--- a/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -247,16 +247,19 @@ MachineInstr *SparcInstrInfo::foldMemoryOperand(MachineFunction &MF,
     isFloat = true;
     // FALLTHROUGH
   case SP::FMOVD:
-    if (OpNum == 0)  // COPY -> STORE
+    if (OpNum == 0) { // COPY -> STORE
+      unsigned SrcReg = MI->getOperand(1).getReg();
+      bool isKill = MI->getOperand(1).isKill();
       NewMI = BuildMI(get(isFloat ? SP::STFri : SP::STDFri))
-               .addFrameIndex(FI).addImm(0).addReg(MI->getOperand(1).getReg());
-    else             // COPY -> LOAD
-      NewMI = BuildMI(get(isFloat ? SP::LDFri : SP::LDDFri),
-                     MI->getOperand(0).getReg()).addFrameIndex(FI).addImm(0);
+        .addFrameIndex(FI).addImm(0).addReg(SrcReg, false, false, isKill);
+    } else {             // COPY -> LOAD
+      unsigned DstReg = MI->getOperand(0).getReg();
+      bool isDead = MI->getOperand(0).isDead();
+      NewMI = BuildMI(get(isFloat ? SP::LDFri : SP::LDDFri))
+        .addReg(DstReg, true, false, false, isDead).addFrameIndex(FI).addImm(0);
+    }
     break;
   }
 
-  if (NewMI)
-    NewMI->copyKillDeadInfo(MI);
   return NewMI;
 }