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[X86] for split stack, not save/restore nested arg if unused

Authored by thanm on Jul 19 2019, 5:54 AM.

Description

[X86] for split stack, not save/restore nested arg if unused

Summary:
For split-stack, if the nested argument (i.e. R10) is not used, no need to save/restore it in the prologue.

Reviewers: thanm

Reviewed By: thanm

Subscribers: mstorsjo, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64673

llvm-svn: 366569

Details

Committed
thanmJul 19 2019, 5:54 AM
Reviewer
thanm
Differential Revision
D64673: [X86] for split stack, not save/restore nested arg if unused
Parents
rG20a0e7caaf39: [Clangd] Fixed ExtractVariable test
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