commit 673b347e5a4aa8ca382dfb38e0cc3e9ead6c68fe
author Krzysztof Parzyszek <kparzysz@codeaurora.org> Mon Aug 22 14:50:12 2016 +0000
committer Krzysztof Parzyszek <kparzysz@codeaurora.org> Mon Aug 22 14:50:12 2016 +0000
tree 035c027f964b23efda10e5eca39ecf6fe6be17ad
parent ed87d788d610063e7c6e74a12565001ce77a0d73

Reset isUndef when removing subreg from a def operand

llvm-svn: 279437

llvm/lib/CodeGen/MachineInstr.cpp

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index f860bac..12081a9 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -93,6 +93,8 @@
     // Note that getSubReg() may return 0 if the sub-register doesn't exist.
     // That won't happen in legal code.
     setSubReg(0);
+    if (isDef())
+      setIsUndef(false);
   }
   setReg(Reg);
 }