Move function-live-in-handling code from the sdisel code to the scheduler.

This code should be emitted after legalize, so it can't be in sdisel.

Note that the EmitFunctionEntryCode hook should be updated to operate on the
DAG.  The X86 backend is the only one currently using this hook.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28315 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 14 deletions

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index cc34d51969..1cac134187 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -3150,24 +3150,11 @@ LowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL,
       }
     }
 
-  // Next, if the function has live ins that need to be copied into vregs,
-  // emit the copies now, into the top of the block.
-  MachineFunction &MF = SDL.DAG.getMachineFunction();
-  if (MF.livein_begin() != MF.livein_end()) {
-    SSARegMap *RegMap = MF.getSSARegMap();
-    const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo();
-    for (MachineFunction::livein_iterator LI = MF.livein_begin(),
-         E = MF.livein_end(); LI != E; ++LI)
-      if (LI->second)
-        MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second,
-                         LI->first, RegMap->getRegClass(LI->second));
-  }
-    
   // Finally, if the target has anything special to do, allow it to do so.
+  // FIXME: this should insert code into the DAG!
   EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction());
 }
 
-
 void SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
        std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate,
                                          FunctionLoweringInfo &FuncInfo) {