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[clang][slh] add attribute for speculative load hardening

Description

[clang][slh] add attribute for speculative load hardening

Summary:
LLVM IR already has an attribute for speculative_load_hardening. Before
this commit, when a user passed the -mspeculative-load-hardening flag to
Clang, every function would have this attribute added to it. This Clang
attribute will allow users to opt into SLH on a function by function basis.

This can be applied to functions and Objective C methods.

Reviewers: chandlerc, echristo

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D54555

Details

Committed
zbridNov 26 2018, 11:41 AM
Differential Revision
D54555: [clang][slh] add attribute for speculative load hardening
Parents
rL347585: [libcxx] Fix XFAILs for aligned allocation tests
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