From c1e2f39b3503869bd471a867c177f6486da5fee0 Mon Sep 17 00:00:00 2001
From: Krzysztof Parzyszek <kparzysz@codeaurora.org>
Date: Tue, 18 Sep 2018 16:10:51 +0000
Subject: [PostRASink] Make sure to remove subregisters from live-ins as well

llvm-svn: 342492
---
 llvm/lib/CodeGen/MachineSink.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

(limited to 'llvm/lib/CodeGen/MachineSink.cpp')

diff --git a/llvm/lib/CodeGen/MachineSink.cpp b/llvm/lib/CodeGen/MachineSink.cpp
index d52e6198d4e..1d2e85accbc 100644
--- a/llvm/lib/CodeGen/MachineSink.cpp
+++ b/llvm/lib/CodeGen/MachineSink.cpp
@@ -1037,8 +1037,11 @@ static void clearKillFlags(MachineInstr *MI, MachineBasicBlock &CurBB,
 static void updateLiveIn(MachineInstr *MI, MachineBasicBlock *SuccBB,
                          SmallVectorImpl<unsigned> &UsedOpsInCopy,
                          SmallVectorImpl<unsigned> &DefedRegsInCopy) {
-  for (auto DefReg : DefedRegsInCopy)
-    SuccBB->removeLiveIn(DefReg);
+  MachineFunction &MF = *SuccBB->getParent();
+  const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
+  for (unsigned DefReg : DefedRegsInCopy)
+    for (MCSubRegIterator S(DefReg, TRI, true); S.isValid(); ++S)
+      SuccBB->removeLiveIn(*S);
   for (auto U : UsedOpsInCopy) {
     unsigned Reg = MI->getOperand(U).getReg();
     if (!SuccBB->isLiveIn(Reg))
-- 
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