commit 7c699f92cd54a82d5abe7cb9db1d2d24c56f2690
author Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Mar 09 03:56:06 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Tue Mar 09 03:56:06 2010 +0000
tree 1416b971d2a016715654ae13c57ca73ee62debe3
parent 19e44b4510c565433ba0e74a4312b52000b90ade

Don't do illegal cross-class coalescing.

llvm-svn: 98044

llvm/lib/CodeGen/MachineCSE.cpp

diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp
index ada95cd..68407c8 100644
--- a/llvm/lib/CodeGen/MachineCSE.cpp
+++ b/llvm/lib/CodeGen/MachineCSE.cpp
@@ -95,7 +95,7 @@
         !SrcSubIdx && !DstSubIdx) {
       const TargetRegisterClass *SRC = MRI->getRegClass(SrcReg);
       const TargetRegisterClass *RC  = MRI->getRegClass(Reg);
-      if (SRC == RC || SRC->hasSubClass(RC) || RC->hasSubClass(SRC)) {
+      if (SRC == RC || RC->hasSubClass(SRC)) {
         DEBUG(dbgs() << "Coalescing: " << *DefMI);
         DEBUG(dbgs() << "*** to: " << *MI);
         MO.setReg(SrcReg);