commit c0075cce7cf6682af8a09126709106866b2f5971
author Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 10 22:42:53 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Sat Jul 10 22:42:53 2010 +0000
tree 473f3bff12029c08fd281fcd5a0dbe73e7150bea
parent a8dab36f3dfdfcd3f74224afa4ffb32776674c93

Only collect subreg extracting copies for later coalescing.
This also avoids fatal copies from physregs.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108061 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/TwoAddressInstructionPass.cpp

diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 00dec66..681473b 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1434,7 +1434,7 @@
       IsImpDef = false;
 
       // Remember COPY sources. These might be candidate for coalescing.
-      if (DefMI->isCopy())
+      if (DefMI->isCopy() && DefMI->getOperand(1).getSubReg())
         RealSrcs.push_back(DefMI->getOperand(1).getReg());
 
       if (!Seen.insert(SrcReg) ||