commit 4a5d8196785e44506e1cfd024388dc8ae50bb219
author Marcin Koscielnicki <koriakin@0x04.net> Thu May 05 00:37:30 2016 +0000
committer Marcin Koscielnicki <koriakin@0x04.net> Thu May 05 00:37:30 2016 +0000
tree 8e3ab737ed3678babeebbca277ec2b790855f547
parent 12329871702d45f8d7861465ce28e6f1b61dfc3c

[SystemZ] Implement backchain attribute (recommit with fix).

This introduces a SystemZ-specific "backchain" attribute on function, which
enables writing the frame backchain link as specified by the ABI.  This will
be used to implement -mbackchain option in clang.

Differential Revision: http://reviews.llvm.org/D19889

Fixed in this version: added RegState::Define and RegState::Kill on R1D
in prologue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268581 91177308-0d34-0410-b5e6-96231b3b80d8