Target: change member from reference to pointer

This is a preliminary step to help ease the construction of CallLoweringInfo.
Changing the construction to a chained function pattern requires that the
parameter be nullable.  However, rather than copying the vector, save a pointer
rather than the reference to permit a late binding of the arguments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@209080 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 15 insertions, 10 deletions

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index dc2c74a835..63a95411b5 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -2111,7 +2111,7 @@ public:
     unsigned NumFixedArgs;
     CallingConv::ID CallConv;
     SDValue Callee;
-    ArgListTy &Args;
+    ArgListTy *Args;
     SelectionDAG &DAG;
     SDLoc DL;
     ImmutableCallSite *CS;
@@ -2131,7 +2131,7 @@ public:
       DoesNotReturn(cs.doesNotReturn()),
       IsReturnValueUsed(!cs.getInstruction()->use_empty()),
       IsTailCall(isTailCall), NumFixedArgs(FTy->getNumParams()),
-      CallConv(cs.getCallingConv()), Callee(callee), Args(args), DAG(dag),
+      CallConv(cs.getCallingConv()), Callee(callee), Args(&args), DAG(dag),
       DL(dl), CS(&cs) {}
 
     /// Constructs a call lowering context based on the provided call
@@ -2145,7 +2145,12 @@ public:
       IsVarArg(isVarArg), IsInReg(isInReg), DoesNotReturn(doesNotReturn),
       IsReturnValueUsed(isReturnValueUsed), IsTailCall(isTailCall),
       NumFixedArgs(numFixedArgs), CallConv(callConv), Callee(callee),
-      Args(args), DAG(dag), DL(dl), CS(nullptr) {}
+      Args(&args), DAG(dag), DL(dl), CS(nullptr) {}
+
+    ArgListTy &getArgs() {
+      assert(Args && "Arguments must be set before accessing them");
+      return *Args;
+    }
   };
 
   /// This function lowers an abstract call to a function into an actual call.
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index ef4f266719..08b5182d4b 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -7124,7 +7124,7 @@ TargetLowering::LowerCallTo(TargetLowering::CallLoweringInfo &CLI) const {
   // Handle all of the outgoing arguments.
   CLI.Outs.clear();
   CLI.OutVals.clear();
-  ArgListTy &Args = CLI.Args;
+  ArgListTy &Args = CLI.getArgs();
   for (unsigned i = 0, e = Args.size(); i != e; ++i) {
     SmallVector<EVT, 4> ValueVTs;
     ComputeValueVTs(*this, Args[i].Ty, ValueVTs);
diff --git a/lib/Target/ARM64/ARM64ISelLowering.cpp b/lib/Target/ARM64/ARM64ISelLowering.cpp
index 3554fff28a..5554245ca7 100644
--- a/lib/Target/ARM64/ARM64ISelLowering.cpp
+++ b/lib/Target/ARM64/ARM64ISelLowering.cpp
@@ -2172,7 +2172,7 @@ SDValue ARM64TargetLowering::LowerCall(CallLoweringInfo &CLI,
     for (unsigned i = 0; i != NumArgs; ++i) {
       MVT ValVT = Outs[i].VT;
       // Get type of the original argument.
-      EVT ActualVT = getValueType(CLI.Args[Outs[i].OrigArgIndex].Ty,
+      EVT ActualVT = getValueType(CLI.getArgs()[Outs[i].OrigArgIndex].Ty,
                                   /*AllowUnknown*/ true);
       MVT ActualMVT = ActualVT.isSimple() ? ActualVT.getSimpleVT() : ValVT;
       ISD::ArgFlagsTy ArgFlags = Outs[i].Flags;
diff --git a/lib/Target/Mips/Mips16ISelLowering.cpp b/lib/Target/Mips/Mips16ISelLowering.cpp
index 0c7dc91ec4..9102450dc5 100644
--- a/lib/Target/Mips/Mips16ISelLowering.cpp
+++ b/lib/Target/Mips/Mips16ISelLowering.cpp
@@ -492,9 +492,9 @@ getOpndList(SmallVectorImpl<SDValue> &Ops,
                              std::end(HardFloatLibCalls), Find))
         LookupHelper = false;
     }
-    if (LookupHelper) Mips16HelperFunction =
-      getMips16HelperFunction(CLI.RetTy, CLI.Args, NeedMips16Helper);
-
+    if (LookupHelper)
+      Mips16HelperFunction =
+        getMips16HelperFunction(CLI.RetTy, CLI.getArgs(), NeedMips16Helper);
   }
 
   SDValue JumpTarget = Callee;
diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index f3a6910fa3..7badc50780 100644
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -2329,7 +2329,7 @@ MipsTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
 
   MipsCCInfo.analyzeCallOperands(Outs, IsVarArg,
                                  Subtarget->mipsSEUsesSoftFloat(),
-                                 Callee.getNode(), CLI.Args);
+                                 Callee.getNode(), CLI.getArgs());
 
   // Get a count of how many bytes are to be pushed on the stack.
   unsigned NextStackOffset = CCInfo.getNextStackOffset();
diff --git a/lib/Target/NVPTX/NVPTXISelLowering.cpp b/lib/Target/NVPTX/NVPTXISelLowering.cpp
index e6860a9b26..b0943befa8 100644
--- a/lib/Target/NVPTX/NVPTXISelLowering.cpp
+++ b/lib/Target/NVPTX/NVPTXISelLowering.cpp
@@ -636,7 +636,7 @@ SDValue NVPTXTargetLowering::LowerCall(TargetLowering::CallLoweringInfo &CLI,
   SDValue Chain = CLI.Chain;
   SDValue Callee = CLI.Callee;
   bool &isTailCall = CLI.IsTailCall;
-  ArgListTy &Args = CLI.Args;
+  ArgListTy &Args = CLI.getArgs();
   Type *retTy = CLI.RetTy;
   ImmutableCallSite *CS = CLI.CS;