Instead of adding copyfromreg's to handle physical definitions. Now isel can

simply specify them as results and let scheduledag handle them. That
is, instead of
SDOperand Flag = DAG.getTargetNode(Opc, MVT::i32, MVT::Flag, ...)
SDOperand Result = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, Flag)

Just write:
SDOperand Result = DAG.getTargetNode(Opc, MVT::i32, MVT::i32, ...)

And let scheduledag emit the move from X86::EAX to a virtual register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40710 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/ScheduleDAG.h b/include/llvm/CodeGen/ScheduleDAG.h
index fd72aeb..d52936a 100644
--- a/include/llvm/CodeGen/ScheduleDAG.h
+++ b/include/llvm/CodeGen/ScheduleDAG.h
@@ -245,7 +245,16 @@ namespace llvm {
     /// EmitNoop - Emit a noop instruction.
     ///
     void EmitNoop();
+
+    /// EmitCopyFromReg - Generate machine code for an CopyFromReg node or an
+    /// implicit physical register output.
+    void EmitCopyFromReg(SDNode *Node, unsigned ResNo, unsigned SrcReg,
+                         DenseMap<SDOperand, unsigned> &VRBaseMap);
     
+    void CreateVirtualRegisters(SDNode *Node, MachineInstr *MI,
+                                const TargetInstrDescriptor &II,
+                                DenseMap<SDOperand, unsigned> &VRBaseMap);
+
     void EmitSchedule();
 
     void dumpSchedule() const;