tree 19da149de8ab58ec6d30d9cef24dabb3328651e8
parent acd27440af3db9930ecc2fcfe2b9bdcc40fc12b9
author Sean Fertile <sfertile@ca.ibm.com> 1539630357 +0000
committer Sean Fertile <sfertile@ca.ibm.com> 1539630357 +0000

[PPC64] Add split - stack support.

This support is slightly different then the X86_64 implementation in that calls
to __morestack don't need to get rewritten to calls to __moresatck_non_split
when a split-stack caller calls a non-split-stack callee. Instead the size of
the stack frame requested by the caller is adjusted prior to the call to
__morestack. The size the stack-frame will be adjusted by is tune-able through a
new --split-stack-adjust-size option.

Differential Revision: https://reviews.llvm.org/D52099

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@344544 91177308-0d34-0410-b5e6-96231b3b80d8