Overwritten with: 0cd3f3e [AMDGPU] Don't remove short branches over k…

…ills

Based on upstream llvm : b54aa05 Update clang-interpreter example to incorporate changes in ce2207a.

Local changes since 861404a:
0cd3f3e [AMDGPU] Don't remove short branches over kills

Added AMD modification notices and removed some GPL files.

Change-Id: I500f5772f5b844856a726845d2fbd4e84493fe80

llvm/lib/Target/AMDGPU/SIRemoveShortExecBranches.cpp

@@ -3,6 +3,8 @@
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+// Modifications Copyright (c) 2019 Advanced Micro Devices, Inc. All rights reserved.
+// Notified per clause 4(b) of the license.
 //
 //===----------------------------------------------------------------------===//
 //
@@ -96,6 +98,9 @@ bool SIRemoveShortExecBranches::mustRetainExeczBranch(
       if (TII->hasUnwantedEffectsWhenEXECEmpty(*I))
         return true;
 
+      if (TII->isKillTerminator(I->getOpcode()))
+        return true;
+
       // These instructions are potentially expensive even if EXEC = 0.
       if (TII->isSMRD(*I) || TII->isVMEM(*I) || TII->isFLAT(*I) ||
           I->getOpcode() == AMDGPU::S_WAITCNT)