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4 Commits

Author SHA1 Message Date
Jonas Paulsson
da3da48a1c [SystemZ] Enable machine scheduler. 
The machine scheduler (before register allocation) is enabled by default for
SystemZ.

The SelectionDAG scheduling preference now becomes source order scheduling
(was regpressure).

Review: Ulrich Weigand
https://reviews.llvm.org/D37977

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315063 91177308-0d34-0410-b5e6-96231b3b80d8
 2017-10-06 13:59:28 +00:00
Marcin Koscielnicki
4a5d819678 [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
 2016-05-05 00:37:30 +00:00
Marcin Koscielnicki
a8d416d07d Revert "[SystemZ] Implement backchain attribute." 
This reverts commit rL268571.

It caused failures in register scavenger.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268576 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-05-04 23:54:53 +00:00
Marcin Koscielnicki
b4420ea315 [SystemZ] Implement backchain attribute. 
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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268571 91177308-0d34-0410-b5e6-96231b3b80d8
 2016-05-04 23:31:20 +00:00