Add support for byval function whose argument is not 32 bit aligned.

To do this it is necessary to add a "always inline" argument to the
memcpy node. For completeness I have also added this node to memmove
and memset.  I have also added getMem* functions, because the extra
argument makes it cumbersome to use getNode and because I get confused
by it :-)

llvm-svn: 43172

1 files changed, 24 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index e6ce2eb9951..09e8b579a0f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2269,6 +2269,30 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
   return getNode(Opcode, VT, Ops, 5);
 }
 
+SDOperand SelectionDAG::getMemcpy(SDOperand Chain, SDOperand Dest,
+                                  SDOperand Src, SDOperand Size,
+                                  SDOperand Align,
+                                  SDOperand AlwaysInline) {
+  SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
+  return getNode(ISD::MEMCPY, MVT::Other, Ops, 6);
+}
+
+SDOperand SelectionDAG::getMemmove(SDOperand Chain, SDOperand Dest,
+                                  SDOperand Src, SDOperand Size,
+                                  SDOperand Align,
+                                  SDOperand AlwaysInline) {
+  SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
+  return getNode(ISD::MEMMOVE, MVT::Other, Ops, 6);
+}
+
+SDOperand SelectionDAG::getMemset(SDOperand Chain, SDOperand Dest,
+                                  SDOperand Src, SDOperand Size,
+                                  SDOperand Align,
+                                  SDOperand AlwaysInline) {
+  SDOperand Ops[] = { Chain, Dest, Src, Size, Align, AlwaysInline };
+  return getNode(ISD::MEMSET, MVT::Other, Ops, 6);
+}
+
 SDOperand SelectionDAG::getLoad(MVT::ValueType VT,
                                 SDOperand Chain, SDOperand Ptr,
                                 const Value *SV, int SVOffset,