From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Tue, 9 Mar 2010 03:56:06 +0000 (+0000)
Subject: Don't do illegal cross-class coalescing.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=1552cccc76c62513a1b38dc1d6fac2c11897cebe;p=oota-llvm.git

Don't do illegal cross-class coalescing.

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

diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp
index ada95cd6da5..68407c88d8e 100644
--- a/lib/CodeGen/MachineCSE.cpp
+++ b/lib/CodeGen/MachineCSE.cpp
@@ -95,7 +95,7 @@ bool MachineCSE::PerformTrivialCoalescing(MachineInstr *MI,
         !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);