[RDF] Differentiate between defining and clobbering nodes

Defining nodes should not alias with one another, while clobbering
nodes can. When pushing defs on stacks, push clobbers first, link
non-clobbering defs, then push the defs.

The data flow in a statement is now: uses -> clobbers -> defs.

llvm-svn: 295356

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Target/Hexagon/RDFCopy.cpp b/llvm/lib/Target/Hexagon/RDFCopy.cpp
index 392871628d9..392ab7af6c2 100644
--- a/llvm/lib/Target/Hexagon/RDFCopy.cpp
+++ b/llvm/lib/Target/Hexagon/RDFCopy.cpp
@@ -104,7 +104,7 @@ bool CopyPropagation::scanBlock(MachineBasicBlock *B) {
     }
 
     updateMap(IA);
-    DFG.pushDefs(IA, DefM);
+    DFG.pushAllDefs(IA, DefM);
   }
 
   MachineDomTreeNode *N = MDT.getNode(B);