Add definition of function MipsTargetLowering::passArgOnStack which emits nodes

for passing a function call argument on a stack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167041 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index 4479c48a91565d324ee265fc127b170a10d18f0f..77f1bac87766335cb43a35e2b2bd25d5e07fc19c 100644 (file)
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -2676,6 +2676,24 @@ IsEligibleForTailCallOptimization(const MipsCC &MipsCCInfo, bool IsVarArg,
   return MipsCCInfo.reservedArgArea() == NextStackOffset;
 }
 
+SDValue
+MipsTargetLowering::passArgOnStack(SDValue StackPtr, unsigned Offset,
+                                   SDValue Chain, SDValue Arg, DebugLoc DL,
+                                   bool IsTailCall, SelectionDAG &DAG) const {
+  if (!IsTailCall) {
+    SDValue PtrOff = DAG.getNode(ISD::ADD, DL, getPointerTy(), StackPtr,
+                                 DAG.getIntPtrConstant(Offset));
+    return DAG.getStore(Chain, DL, Arg, PtrOff, MachinePointerInfo(), false,
+                        false, 0);
+  }
+
+  MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo();
+  int FI = MFI->CreateFixedObject(Arg.getValueSizeInBits() / 8, Offset, false);
+  SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
+  return DAG.getStore(Chain, DL, Arg, FIN, MachinePointerInfo(),
+                      /*isVolatile=*/ true, false, 0);
+}
+
 /// LowerCall - functions arguments are copied from virtual regs to
 /// (physical regs)/(stack frame), CALLSEQ_START and CALLSEQ_END are emitted.
 SDValue

diff --git a/lib/Target/Mips/MipsISelLowering.h b/lib/Target/Mips/MipsISelLowering.h
index 9e8c659829fa35d9bf1c668ea1255ee8fef84192..4f1ce0cd1c6ad1e7c64af079bfa6402760a57eca 100644 (file)
--- a/lib/Target/Mips/MipsISelLowering.h
+++ b/lib/Target/Mips/MipsISelLowering.h
@@ -309,6 +309,10 @@ namespace llvm {
                            DebugLoc dl, SelectionDAG &DAG,
                            SmallVectorImpl<SDValue> &InVals) const;
 
+    SDValue passArgOnStack(SDValue StackPtr, unsigned Offset, SDValue Chain,
+                           SDValue Arg, DebugLoc DL, bool IsTailCall,
+                           SelectionDAG &DAG) const;
+
     virtual SDValue
       LowerCall(TargetLowering::CallLoweringInfo &CLI,
                 SmallVectorImpl<SDValue> &InVals) const;