Add ISD::UNDEF node
Teach the SelectionDAG code how to expand and promote it
Have PPC32 LowerCallTo generate ISD::UNDEF for int arg regs used up by fp
arguments, but not shadowing their value. This allows us to do the right
thing with both fixed and vararg floating point arguments.
llvm-svn: 20988
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index edc5b8c..023848a 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1112,6 +1112,7 @@
case ISD::CopyToReg: return "CopyToReg";
case ISD::CopyFromReg: return "CopyFromReg";
case ISD::ImplicitDef: return "ImplicitDef";
+ case ISD::UNDEF: return "undef";
case ISD::ADD: return "add";
case ISD::SUB: return "sub";