commit 1552cccc76c62513a1b38dc1d6fac2c11897cebe
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 2f33312e118e596b9d970fd68ed4d3c95f871816
parent 31f94c7c22cbf59753764bc17130dca6a73c0b4e

Don't do illegal cross-class coalescing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98044 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/MachineCSE.cpp

diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index ada95cd..68407c8 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/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);