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

Description

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

Summary:
Resubmit this with no changes because I think the build was broken

by a different diff.

The prior diff had to be reverted because there were two tests
that failed. I updated the two tests in this diff

clang/test/Misc/pragma-attribute-supported-attributes-list.test
clang/test/SemaCXX/attr-speculative-load-hardening.cpp

  • Summary from Previous Diff (Still Accurate) -----

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, kristof.beyls, aaron.ballman

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D54915

Details

Committed
zbridNov 27 2018, 11:56 AM
Differential Revision
D54915: [clang][slh] add attribute for speculative load hardening
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