diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -4292,7 +4292,7 @@
 
   // If the function takes variable number of arguments, make a frame index for
   // the start of the first vararg value... for expansion of llvm.va_start.
-  if (isVarArg) {
+  if (isVarArg && MFI.hasVAStart()) {
     int Depth = ArgOffset;
 
     FuncInfo->setVarArgsFrameIndex(
@@ -4309,7 +4309,7 @@
       SDValue Store =
           DAG.getStore(Val.getValue(1), dl, Val, FIN, MachinePointerInfo());
       MemOps.push_back(Store);
-      // Increment the address by four for the next argument to store
+      // Increment the address by PtrByteSize for the next argument to store.
       SDValue PtrOff = DAG.getConstant(PtrByteSize, dl, PtrVT);
       FIN = DAG.getNode(ISD::ADD, dl, PtrOff.getValueType(), FIN, PtrOff);
     }
diff --git a/llvm/test/CodeGen/PowerPC/ppc64-varargs.ll b/llvm/test/CodeGen/PowerPC/ppc64-varargs.ll
--- a/llvm/test/CodeGen/PowerPC/ppc64-varargs.ll
+++ b/llvm/test/CodeGen/PowerPC/ppc64-varargs.ll
@@ -7,29 +7,12 @@
 define i32 @f(...) nounwind {
 ; BE-LABEL: f:
 ; BE:       # %bb.0: # %entry
-; BE-NEXT:    mr r11, r3
 ; BE-NEXT:    li r3, 0
-; BE-NEXT:    std r11, 48(r1)
-; BE-NEXT:    std r4, 56(r1)
-; BE-NEXT:    std r5, 64(r1)
-; BE-NEXT:    std r6, 72(r1)
-; BE-NEXT:    std r7, 80(r1)
-; BE-NEXT:    std r8, 88(r1)
-; BE-NEXT:    std r9, 96(r1)
-; BE-NEXT:    std r10, 104(r1)
 ; BE-NEXT:    blr
 ;
 ; LE-LABEL: f:
 ; LE:       # %bb.0: # %entry
-; LE-NEXT:    std r3, 32(r1)
 ; LE-NEXT:    li r3, 0
-; LE-NEXT:    std r4, 40(r1)
-; LE-NEXT:    std r5, 48(r1)
-; LE-NEXT:    std r6, 56(r1)
-; LE-NEXT:    std r7, 64(r1)
-; LE-NEXT:    std r8, 72(r1)
-; LE-NEXT:    std r9, 80(r1)
-; LE-NEXT:    std r10, 88(r1)
 ; LE-NEXT:    blr
 entry:
   ret i32 0