From: Evan Cheng <evan.cheng@apple.com>
Date: Sat, 7 Jan 2012 02:55:54 +0000 (+0000)
Subject: Copy implicit defs (e.g. r0) when changing tBX_RET to tPOP_RET. This bug is
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ccec74738d0fc34f4bc2ac6909324e62705f1c38;p=oota-llvm.git

Copy implicit defs (e.g. r0) when changing tBX_RET to tPOP_RET. This bug is
exposed with an upcoming change will would delete the copy to return register
because there is no use! It's amazing anything works.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147715 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/Thumb1FrameLowering.cpp b/lib/Target/ARM/Thumb1FrameLowering.cpp
index e171b274deb..16c7cbc4a0d 100644
--- a/lib/Target/ARM/Thumb1FrameLowering.cpp
+++ b/lib/Target/ARM/Thumb1FrameLowering.cpp
@@ -350,6 +350,7 @@ restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
         continue;
       Reg = ARM::PC;
       (*MIB).setDesc(TII.get(ARM::tPOP_RET));
+      MIB->copyImplicitOps(&*MI);
       MI = MBB.erase(MI);
     }
     MIB.addReg(Reg, getDefRegState(true));