commit 4c82a9e7d041c69528a715edaf4cc4bc1017e646
author Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 03 00:04:37 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 03 00:04:37 2010 +0000
tree 507212f1a595b90b230f8441d629605ee50230f1
parent ece6906ea0e3e189e6a2a94c9fd10cbadd7d368b

Detect and handle COPY in many places.

This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.

llvm-svn: 107547

llvm/lib/CodeGen/PreAllocSplitting.cpp

diff --git a/llvm/lib/CodeGen/PreAllocSplitting.cpp b/llvm/lib/CodeGen/PreAllocSplitting.cpp
index 8784dc9..fbe9918 100644
--- a/llvm/lib/CodeGen/PreAllocSplitting.cpp
+++ b/llvm/lib/CodeGen/PreAllocSplitting.cpp
@@ -677,10 +677,12 @@
     
     // If the def is a move, set the copy field.
     unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
-    if (TII->isMoveInstr(*DI, SrcReg, DstReg, SrcSubIdx, DstSubIdx))
+    if (TII->isMoveInstr(*DI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)) {
       if (DstReg == LI->reg)
         NewVN->setCopy(&*DI);
-    
+    } else if (DI->isCopyLike() && DI->getOperand(0).getReg() == LI->reg)
+      NewVN->setCopy(&*DI);
+
     NewVNs[&*DI] = NewVN;
   }