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# 43b055f8 09-Mar-2018 Peter Collingbourne <[email protected]>

cfi: Disable simple-pass.cpp on Darwin.

-mretpoline does not work yet on Darwin.

llvm-svn: 327168
# 2974856a 09-Mar-2018 Peter Collingbourne <[email protected]>

Use branch funnels for virtual calls when retpoline mitigation is enabled.

The retpoline mitigation for variant 2 of CVE-2017-5715 inhibits the
branch predictor, and as a result it can lead to a mea

Use branch funnels for virtual calls when retpoline mitigation is enabled.

The retpoline mitigation for variant 2 of CVE-2017-5715 inhibits the
branch predictor, and as a result it can lead to a measurable loss of
performance. We can reduce the performance impact of retpolined virtual
calls by replacing them with a special construct known as a branch
funnel, which is an instruction sequence that implements virtual calls
to a set of known targets using a binary tree of direct branches. This
allows the processor to speculately execute valid implementations of the
virtual function without allowing for speculative execution of of calls
to arbitrary addresses.

This patch extends the whole-program devirtualization pass to replace
certain virtual calls with calls to branch funnels, which are
represented using a new llvm.icall.jumptable intrinsic. It also extends
the LowerTypeTests pass to recognize the new intrinsic, generate code
for the branch funnels (x86_64 only for now) and lay out virtual tables
as required for each branch funnel.

The implementation supports full LTO as well as ThinLTO, and extends the
ThinLTO summary format used for whole-program devirtualization to
support branch funnels.

For more details see RFC:
http://lists.llvm.org/pipermail/llvm-dev/2018-January/120672.html

Differential Revision: https://reviews.llvm.org/D42453

llvm-svn: 327163

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Revision tags: llvmorg-6.0.0, llvmorg-6.0.0-rc3, llvmorg-6.0.0-rc2, llvmorg-6.0.0-rc1, llvmorg-5.0.1, llvmorg-5.0.1-rc3, llvmorg-5.0.1-rc2, llvmorg-5.0.1-rc1
# 3ccd23e1 02-Oct-2017 Filipe Cabecinhas <[email protected]>

Use %run for running CFI tests

Reviewers: pcc, krasin, eugenis

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D38412

llvm-svn: 314659
Revision tags: llvmorg-5.0.0, llvmorg-5.0.0-rc5, llvmorg-5.0.0-rc4, llvmorg-5.0.0-rc3, llvmorg-5.0.0-rc2, llvmorg-5.0.0-rc1, llvmorg-4.0.1, llvmorg-4.0.1-rc3, llvmorg-4.0.1-rc2, llvmorg-4.0.1-rc1, llvmorg-4.0.0, llvmorg-4.0.0-rc4, llvmorg-4.0.0-rc3, llvmorg-4.0.0-rc2, llvmorg-4.0.0-rc1, llvmorg-3.9.1, llvmorg-3.9.1-rc3, llvmorg-3.9.1-rc2, llvmorg-3.9.1-rc1, llvmorg-3.9.0, llvmorg-3.9.0-rc3, llvmorg-3.9.0-rc2
# 8de920cf 05-Aug-2016 Ivan Krasin <[email protected]>

Reverting r277632 as it breaks the build on MacOS.

Reviewers: kcc

Differential Revision: https://reviews.llvm.org/D23190

llvm-svn: 277798
# 9535cebb 03-Aug-2016 Ivan Krasin <[email protected]>

Add CFI tests for -lowertypetests-bitsets-level.

Summary:
-lowertypetests-bitsets-level controls which kinds of bitsets
are generated, as introduced in r277556. This change adds tests
to compiler-rt

Add CFI tests for -lowertypetests-bitsets-level.

Summary:
-lowertypetests-bitsets-level controls which kinds of bitsets
are generated, as introduced in r277556. This change adds tests
to compiler-rt.

Reviewers: kcc

Differential Revision: https://reviews.llvm.org/D23103

llvm-svn: 277632

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Revision tags: llvmorg-3.9.0-rc1, llvmorg-3.8.1, llvmorg-3.8.1-rc1, llvmorg-3.8.0, llvmorg-3.8.0-rc3, llvmorg-3.8.0-rc2, llvmorg-3.8.0-rc1, llvmorg-3.7.1, llvmorg-3.7.1-rc2, llvmorg-3.7.1-rc1, llvmorg-3.7.0, llvmorg-3.7.0-rc4, llvmorg-3.7.0-rc3, llvmorg-3.7.0-rc2, llvmorg-3.7.0-rc1, llvmorg-3.6.2, llvmorg-3.6.2-rc1, llvmorg-3.6.1, llvmorg-3.6.1-rc1
# 7881648a 02-Apr-2015 Peter Collingbourne <[email protected]>

Add tests for non-virtual call checking.

Differential Revision: http://reviews.llvm.org/D8792

llvm-svn: 233876
Revision tags: llvmorg-3.5.2, llvmorg-3.5.2-rc1, llvmorg-3.6.0
# f1d13da2 21-Feb-2015 Peter Collingbourne <[email protected]>

CFI: Add tests for 32-bit, 64-bit and memory bitsets. Break optimization in more places.

llvm-svn: 230116
# e0c4f7eb 20-Feb-2015 Peter Collingbourne <[email protected]>

Add test suite for the Control Flow Integrity feature.

Differential Revision: http://reviews.llvm.org/D7738

llvm-svn: 230056