Revert 84315 for now. Re-thinking the patch.

llvm-svn: 84321
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
index f0ea93c..07e0d83 100644
--- a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
@@ -322,7 +322,7 @@
       // from this parameter
       SDValue FIN = DAG.getFrameIndex(FI, getPointerTy());
       ArgValue = DAG.getLoad(LocVT, dl, Chain, FIN,
-                             PseudoSourceValue::getStackObject(FI), 0);
+                             PseudoSourceValue::getFixedStack(FI), 0);
     }
 
     // If this is an 8/16/32-bit value, it is really passed promoted to 64