Summary:
This patch starts the implementation as discuss in the following RFC: http://lists.llvm.org/pipermail/llvm-dev/2016-October/106532.html
When optimization duplicates code that will scale down the execution count of a basic block, we will record the duplication factor as part of discriminator so that the offline process tool can find the duplication factor and collect the accurate execution frequency of the corresponding source code. Two important optimization that fall into this category is loop vectorization and loop unroll. This patch records the duplication factor for these 2 optimizations.
The recording will be guarded by a flag encode-duplication-in-discriminators, which is off by default.
Reviewers: probinson, aprantl, davidxl, hfinkel, echristo
Reviewed By: hfinkel
Subscribers: mehdi_amini, anemet, mzolotukhin, llvm-commits
Differential Revision: https://reviews.llvm.org/D26420
llvm-svn: 294782
The pygments syntax highlighting package used by sphinx fails to parse
newer LLVM constructs or valid (at least to me) gas constructs like
`.secrel32 _function_name + 0`.
Disable this particular warning so the build doesn't abort as fixing
pygments doesn't seem a workable option here.
Differential Revision: https://reviews.llvm.org/D29794
llvm-svn: 294672
Summary:
Documentation update to reflect the changes that occured in the allocator:
- additional architectures support;
- modification of the header;
- options default values for 32 & 64-bit.
Reviewers: kcc, alekseyshl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D29592
llvm-svn: 294595
1. Added missing substitutions to the documentation in docs/TestingGuide.rst
2. Modified docs/CommandGuide/lit.rst to only document the "base" set of substitutions and to refer the reader to docs/TestingGuide.rst for more detailed info on substitutions.
Patch by bd1976llvm
Differential Revision: https://reviews.llvm.org/D29281
llvm-svn: 294586
Summary:
The intrinsic, marked as returning it's first argument, has no code
generation effect (though currently not every optimization pass knows
that intrinsics with the returned attribute can be looked through).
It is about to be used to by the PredicateInfo pass to attach
predicate information to existing operands, and be able to tell what
the predicate information affects.
We deliberately do not attach any info through a second operand so
that the intrinsics do not need to dominate the comparisons/etc (since
in the case of assume, we may want to push them up the post-dominator
tree).
Reviewers: davide, sanjoy
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D29517
llvm-svn: 294341
Summary:
This change allows usage of store instruction for implicit null check.
Memory Aliasing Analisys is not used and change conservatively supposes
that any store and load may access the same memory. As a result
re-ordering of store-store, store-load and load-store is prohibited.
Patch by Serguei Katkov!
Reviewers: reames, sanjoy
Reviewed By: sanjoy
Subscribers: atrick, llvm-commits
Differential Revision: https://reviews.llvm.org/D29400
llvm-svn: 294338
Summary:
This also adds docs to suggest that maintainers of buildbots for
experimental backends should use this buildmaster.
Reviewers: dsanders, grosser, asb, mehdi_amini
Reviewed By: grosser
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D29560
llvm-svn: 294144
@ABS8 can be applied to symbols which appear as immediate operands to
instructions that have a 8-bit immediate form for that operand. It causes
the assembler to use the 8-bit form and an 8-bit relocation (e.g. R_386_8
or R_X86_64_8) for the symbol.
Differential Revision: https://reviews.llvm.org/D28688
llvm-svn: 293667
Summary: Change B type from double to pointer to double.
Reviewers: delena, sanjoy
Reviewed By: sanjoy
Subscribers: sanjoy, llvm-commits
Differential Revision: https://reviews.llvm.org/D29009
llvm-svn: 293467
Summary:
Some frontends emit a speculate-and-select idiom for sqrt, wherein they compute
sqrt(x), check if x is negative, and select NaN if it is:
%cmp = fcmp olt double %a, -0.000000e+00
%sqrt = call double @llvm.sqrt.f64(double %a)
%ret = select i1 %cmp, double 0x7FF8000000000000, double %sqrt
This is technically UB as the LangRef is written today if %a is ever less than
-0. But emitting code that's compliant with the current definition of sqrt
would require a branch, which would then prevent us from matching this idiom in
SelectionDAG (which we do today -- ISD::FSQRT has defined behavior on negative
inputs), because SelectionDAG looks at one BB at a time.
Nothing in LLVM takes advantage of this undefined behavior, as far as we can
tell, and the fact that llvm.sqrt has UB dates from its initial addition to the
LangRef.
Reviewers: arsenm, mehdi_amini, hfinkel
Subscribers: wdng, llvm-commits
Differential Revision: https://reviews.llvm.org/D28797
llvm-svn: 293242
This commit introduces a set of experimental intrinsics intended to prevent
optimizations that make assumptions about the rounding mode and floating point
exception behavior. These intrinsics will later be extended to specify
flush-to-zero behavior. More work is also required to model instruction
dependencies in machine code and to generate these instructions from clang
(when required by pragmas and/or command line options that are not currently
supported).
Differential Revision: https://reviews.llvm.org/D27028
llvm-svn: 293226
Summary: Fix the example of equivalent expansion for when mask is all ones.
Reviewers: delena
Reviewed By: delena
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D29179
llvm-svn: 293206
Document the current practice regarding dropping metadata on modules,
functions and global variables.
Differential Revision: https://reviews.llvm.org/D29110
llvm-svn: 293101
and UNSUPPORTED"
After r292904 llvm-lit fails to emit the test results in the XML format for
Apple's internal buildbots.
rdar://30164800
llvm-svn: 292942
A `lit` condition line is now a comma-separated list of boolean expressions.
Comma-separated expressions act as if each expression were on its own
condition line:
For REQUIRES, if every expression is true then the test will run.
For UNSUPPORTED, if every expression is false then the test will run.
For XFAIL, if every expression is false then the test is expected to succeed.
As a special case "XFAIL: *" expects the test to fail.
Examples:
# Test is expected fail on 64-bit Apple simulators and pass everywhere else
XFAIL: x86_64 && apple && !macosx
# Test is unsupported on Windows and on non-Ubuntu Linux
# and supported everywhere else
UNSUPPORTED: linux && !ubuntu, system-windows
Syntax:
* '&&', '||', '!', '(', ')'. 'true' is true. 'false' is false.
* Each test feature is a true identifier.
* Substrings of the target triple are true identifiers for UNSUPPORTED
and XFAIL, but not for REQUIRES. (This matches the current behavior.)
* All other identifiers are false.
* Identifiers are [-+=._a-zA-Z0-9]+
Differential Revision: https://reviews.llvm.org/D18185
llvm-svn: 292904
A `lit` condition line is now a comma-separated list of boolean expressions.
Comma-separated expressions act as if each expression were on its own
condition line:
For REQUIRES, if every expression is true then the test will run.
For UNSUPPORTED, if every expression is false then the test will run.
For XFAIL, if every expression is false then the test is expected to succeed.
As a special case "XFAIL: *" expects the test to fail.
Examples:
# Test is expected fail on 64-bit Apple simulators and pass everywhere else
XFAIL: x86_64 && apple && !macosx
# Test is unsupported on Windows and on non-Ubuntu Linux
# and supported everywhere else
UNSUPPORTED: linux && !ubuntu, system-windows
Syntax:
* '&&', '||', '!', '(', ')'. 'true' is true. 'false' is false.
* Each test feature is a true identifier.
* Substrings of the target triple are true identifiers for UNSUPPORTED
and XFAIL, but not for REQUIRES. (This matches the current behavior.)
* All other identifiers are false.
* Identifiers are [-+=._a-zA-Z0-9]+
Differential Revision: https://reviews.llvm.org/D18185
llvm-svn: 292896
Since r279760, we've been marking as legal operations on narrow integer
types that have wider legal equivalents (for instance, G_ADD s8).
Compared to legalizing these operations, this reduced the amount of
extends/truncates required, but was always a weird legalization decision
made at selection time.
So far, we haven't been able to formalize it in a way that permits the
selector generated from SelectionDAG patterns to be sufficient.
Using a wide instruction (say, s64), when a narrower instruction exists
(s32) would introduce register class incompatibilities (when one narrow
generic instruction is selected to the wider variant, but another is
selected to the narrower variant).
It's also impractical to limit which narrow operations are matched for
which instruction, as restricting "narrow selection" to ranges of types
clashes with potentially incompatible instruction predicates.
Concerns were also raised regarding MIPS64's sign-extended register
assumptions, as well as wrapping behavior.
See discussions in https://reviews.llvm.org/D26878.
Instead, legalize the operations.
Should we ever revert to selecting these narrow operations, we should
try to represent this more accurately: for instance, by separating
a "concrete" type on operations, and an "underlying" type on vregs, we
could move the "this narrow-looking op is really legal" decision to the
legalizer, and let the selector use the "underlying" vreg type only,
which would be guaranteed to map to a register class.
In any case, we eventually should mitigate:
- the performance impact by selecting no-op extract/truncates to COPYs
(which we currently do), and the COPYs to register reuses (which we
don't do yet).
- the compile-time impact by optimizing away extract/truncate sequences
in the legalizer.
llvm-svn: 292827
Summary:
Docs for clang::Decl and clang::TemplateSpecializationType have
not been generated since LLVM_ALIGNAS was added to them.
Tell Doxygen to expand LLVM_ALIGNAS to nothing as described at
https://www.stack.nl/~dimitri/doxygen/manual/preprocessing.html
Reviewers: aaron.ballman, klimek, alexfh
Subscribers: ioeric, cfe-commits
Differential Revision: https://reviews.llvm.org/D28850
llvm-svn: 292483
Summary:
This change equips lit.py with two new options, --num-shards=M and
--run-shard=N (set by default from env vars LIT_NUM_SHARDS and LIT_RUN_SHARD).
The options must be used together, and N must be in 1..M.
Together these options effect only test selection: they partition the testsuite
into M equal-sized "shards", then select only the Nth shard. They can be used
in a cluster of test machines to achieve a very crude (static) form of
parallelism, with minimal configuration work.
Reviewers: modocache, ddunbar
Reviewed By: ddunbar
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28789
llvm-svn: 292417
Summary:
Previously there were three ways to inform the NVVMReflect pass whether
you wanted to flush denormals to zero:
* An LLVM command-line option
* Parameters to the NVVMReflect constructor
* Metadata on the module itself.
This change removes the first two, leaving only the third.
The motivation for this change, aside from simplifying things, is that
we want LLVM to be aware of whether it's operating in FTZ mode, so other
passes can use this information. Ideally we'd have a target-generic
piece of metadata on the module. This change moves us in that
direction.
Reviewers: tra
Subscribers: jholewinski, llvm-commits
Differential Revision: https://reviews.llvm.org/D28700
llvm-svn: 292068
Summary:
This string parameter is passed to -fuse-ld when linking. It can be
an absolute path to your custom linker, otherwise clang will look for
`ld.{name}`.
Reviewers: davide, tejohnson, pcc
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D28738
llvm-svn: 292047
Add an explicit LLVM_ENABLE_DIA_SDK option to control building support
for DIA SDK-based debugging. Control its value to match whether DIA SDK
support was found and expose it in LLVMConfig (alike LLVM_ENABLE_ZLIB).
Its value is needed for LLDB to determine whether to run tests requiring
DIA support. Currently it is obtained from llvm/Config/config.h;
however, this file is not available for standalone builds. Following
this change, LLDB will be modified to use the value from LLVMConfig.
Differential Revision: https://reviews.llvm.org/D26255
llvm-svn: 290818
Summary: Update the Phabricator docs to clarify how changes are merged for contributors without commit access.
Reviewers: delcypher, aaron.ballman
Subscribers: aaron.ballman, anmol, llvm-commits
Differential Revision: https://reviews.llvm.org/D28184
llvm-svn: 290767
Summary:
gep 0, 0 is equivalent to bitcast. LLVM canonicalizes it
to getelementptr because it make SROA can then handle it.
Simple case like
void g(A &a) {
z(a);
if (glob)
a.foo();
}
void testG() {
A a;
g(a);
}
was not devirtualized with -fstrict-vtable-pointers because luck of
handling for gep 0 in Memory Dependence Analysis
Reviewers: dberlin, nlewycky, chandlerc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D28126
llvm-svn: 290763
This change adds a new intrinsic which is intended to provide memcpy functionality
with additional atomicity guarantees. Please refer to the review thread
or language reference for further details.
Differential Revision: https://reviews.llvm.org/D27133
llvm-svn: 290708
Summary:
This replaces the format member search, which was quite complicated, with a more
direct approach to detecting whether a class should be formatted using the
format-member method. Instead we use a special type llvm::format_adapter, which
every adapter must inherit from. Then the search can be simply implemented with
the is_base_of type trait.
Aside from the simplification, I like this way more because it makes it more
explicit that you are supposed to use this type only for adapter-like
formattings, and the other approach (format_provider overloads) should be used
as a default (a mistake I made when first trying to use this library).
The only slight change in behaviour here is that now choose the format-adapter
branch even if the format member invocation will fail to compile (e.g. because it is a
non-const member function and we are passing a const adapter), whereas
previously we would have gone on to search for format_providers for the type.
However, I think that is actually a good thing, as it probably means the
programmer did something wrong.
Reviewers: zturner, inglorion
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D27679
llvm-svn: 289795
There was an efficiency problem with how we processed @llvm.assume in
ValueTracking (and other places). The AssumptionCache tracked all of the
assumptions in a given function. In order to find assumptions relevant to
computing known bits, etc. we searched every assumption in the function. For
ValueTracking, that means that we did O(#assumes * #values) work in InstCombine
and other passes (with a constant factor that can be quite large because we'd
repeat this search at every level of recursion of the analysis).
Several of us discussed this situation at the last developers' meeting, and
this implements the discussed solution: Make the values that an assume might
affect operands of the assume itself. To avoid exposing this detail to
frontends and passes that need not worry about it, I've used the new
operand-bundle feature to add these extra call "operands" in a way that does
not affect the intrinsic's signature. I think this solution is relatively
clean. InstCombine adds these extra operands based on what ValueTracking, LVI,
etc. will need and then those passes need only search the users of the values
under consideration. This should fix the computational-complexity problem.
At this point, no passes depend on the AssumptionCache, and so I'll remove
that as a follow-up change.
Differential Revision: https://reviews.llvm.org/D27259
llvm-svn: 289755
Summary:
Attaching !absolute_symbol to a global variable does two things:
1) Marks it as an absolute symbol reference.
2) Specifies the value range of that symbol's address.
Teach the X86 backend to allow absolute symbols to appear in place of
immediates by extending the relocImm and mov64imm32 matchers. Start using
relocImm in more places where it is legal.
As previously proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105800.html
Differential Revision: https://reviews.llvm.org/D25878
llvm-svn: 289087
The relocations for `DIEEntry::EmitValue` were wrong for Win64
(emitting FK_Data_4 instead of FK_SecRel_4). This corrects that
oversight so that the DWARF data is correct in Win64 COFF files.
Fixes PR15393.
Patch by Jameson Nash <jameson@juliacomputing.com> based on a patch
by David Majnemer.
Differential Revision: https://reviews.llvm.org/D21731
llvm-svn: 289013
Now that PointerType is no longer a SequentialType, all SequentialTypes
have an associated number of elements, so we can move that information to
the base class, allowing for a number of simplifications.
Differential Revision: https://reviews.llvm.org/D27122
llvm-svn: 288464
As proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/106640.html
This is for a couple of reasons:
- Values of type PointerType are unlike the other SequentialTypes (arrays
and vectors) in that they do not hold values of the element type. By moving
PointerType we can unify certain aspects of how the other SequentialTypes
are handled.
- PointerType will have no place in the SequentialType hierarchy once
pointee types are removed, so this is a necessary step towards removing
pointee types.
Differential Revision: https://reviews.llvm.org/D26595
llvm-svn: 288462
While reading the LTO docs I fixed few small typos and whitespace issues.
Patch by: Jonas Devlieghere <jonas@devlieghere.com>
Differential Revision: https://reviews.llvm.org/D27196
llvm-svn: 288171
The previously used "names" are rather descriptions (they use multiple
words and contain spaces), use short programming language identifier
like strings for the "names" which should be used when exporting to
machine parseable formats.
Also removed a unused TimerGroup from Hexxagon.
Differential Revision: https://reviews.llvm.org/D25583
llvm-svn: 287369
Summary:
We update the documentation to define what the requirements are for the
provided XRay log handler. This is to make it clear that the function
pointer provided must do internal synchronisation and that there are no
guarantees provided by XRay on when the function shall be invoked once
it has been installed as a log handler.
Reviewers: rSerge, rengolin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D26651
llvm-svn: 287073
`shl nsw i8 1, i8 8` is poison, but `mul i8 1, i8 128` is not.
This was discussed previously here:
http://lists.llvm.org/pipermail/llvm-dev/2015-April/084195.html. From
the discussion, it was not clear which semantics we want for `shl`, but
for now at least make the language reference more accurate.
llvm-svn: 286785
This introduces a new type-safe general purpose formatting
library. It provides compile-time type safety, does not require
a format specifier (since the type is deduced), and provides
mechanisms for extending the format capability to user defined
types, and overriding the formatting behavior for existing types.
This patch additionally adds documentation for the API to the
LLVM programmer's manual.
Mailing List Thread:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105836.html
Differential Revision: https://reviews.llvm.org/D25587
llvm-svn: 286682
If the inrange keyword is present before any index, loading from or
storing to any pointer derived from the getelementptr has undefined
behavior if the load or store would access memory outside of the bounds of
the element selected by the index marked as inrange.
This can be used, e.g. for alias analysis or to split globals at element
boundaries where beneficial.
As previously proposed on llvm-dev:
http://lists.llvm.org/pipermail/llvm-dev/2016-July/102472.html
Differential Revision: https://reviews.llvm.org/D22793
llvm-svn: 286514
Summary:
This is the initial version of the documentation for how to use XRay as
it stands in LLVM, Clang, and compiler-rt. We leave some room for later
expansion mentioining what is work in progress and what could be
expected moving forward.
We also give a high level overview of future work that's both ongoing
and planned.
Reviewers: echristo, dblaikie, chandlerc
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D26386
llvm-svn: 286319
programmer's manual.
ExitOnError is often a better alternative to handleErrors for tool code. This
patch makes it easier to find the ExitOnError discussion when reading the
handleErrors section.
Thanks to Peter Collingbourne for the suggestion.
llvm-svn: 286167
Summary:
This allows to have clang and llvm and the other subprojects
side-by-side instead of nested. This can be used with the monorepo or
multiple repos.
It will help having a single set of sources checked out but allows to
have a build directory with llvm and another one with llvm+clang.
Basically it abstracts LLVM_EXTERNAL_xxxx_SOURCE_DIR making it more
convenient by adopting a convention.
Reviewers: bogner, beanz, jlebar
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D26365
llvm-svn: 286162
Summary:
Some changes are made to cmake, especially the addition of a new
LLVM_ENABLE_PROJECTS option that makes the build system aware of
the monorepo directory structure.
Also a new script is added in llvm/utils/git-svn/. When present in
the $PATH, it enables a `git llvm` command. It is providing at this
point only the ability to push from the git monorepo: `git llvm push`.
It is intended to evolves with more features, for instance I plan on
features like `git llvm show r284955` to help working with sequential
revision numbers.
The push feature is taken from Justin Lebar's script available here:
https://github.com/jlebar/llvm-repo-tools/
Reviewers: jlebar
Subscribers: mgorny, modocache, llvm-commits
Differential Revision: https://reviews.llvm.org/D26334
llvm-svn: 286123
Summary:
This kill various depreacated API related to attribute :
- The deprecated C API attribute based on LLVMAttribute enum.
- The Raw attribute set format (planned to be removed in 4.0).
Reviewers: bkramer, echristo, mehdi_amini, void
Subscribers: mehdi_amini, llvm-commits
Differential Revision: https://reviews.llvm.org/D23039
llvm-svn: 286062
This reflects the current state of Global ISel. As progress is
made, we'll document our design decisions in it.
Comments very welcome!
llvm-svn: 286002
This contains just enough for lib/Target/RISCV to compile. Notably a basic
RISCVTargetMachine and RISCVTargetInfo. At this point you can attempt llc
-march=riscv32 myinput.ll and will find it fails due to the lack of
MCAsmInfo.
See http://lists.llvm.org/pipermail/llvm-dev/2016-August/103748.html for
further discussion
Differential Revision: https://reviews.llvm.org/D23560
llvm-svn: 285712
DW_TAG_atomic_type was already included in Dwarf.defs and emitted correctly,
however Verifier didn't recognize it as valid.
Thus we introduce the following changes:
* Make DW_TAG_atomic_type valid tag for IR and DWARF (enabled only with -gdwarf-5)
* Add it to related docs
* Add DebugInfo tests
Differential Revision: https://reviews.llvm.org/D26144
llvm-svn: 285624
* Assume that clang passes non-zero alignment value to DIBuilder
only in case when it was forced by C++11 'alignas', C11 '_Alignas'
or compiler attribute '__attribute__((aligned (N)))'.
* Emit DW_AT_alignment if alignment is specified for type/object.
Differential Revision: https://reviews.llvm.org/D24425
llvm-svn: 285189
* Assume that clang passes non-zero alignment value to DIBuilder
only in case when it was forced by C++11 'alignas', C11 '_Alignas'
or compiler attribute '__attribute__((aligned (N)))'.
* Emit DW_AT_alignment if alignment is specified for type/object.
Differential Revision: https://reviews.llvm.org/D24425
llvm-svn: 285181
This patch updates some of the existing Error examples, expands on the
documentation for handleErrors, and includes new sections that cover
a number of helpful utilities and common error usage idioms.
llvm-svn: 285122
Summary:
The RFC proposal sent to increase the minimum required GCC version
to 4.8 received a lot of support. See the following thread:
http://lists.llvm.org/pipermail/llvm-dev/2016-October/105955.html,
This patch implements that by updating the docs. I believe the
references to libstdc++ 4.7 issues can be removed as well, please
let me know if that is not the case or if they should be updated
a different way.
Reviewers: rengolin
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D25683
llvm-svn: 284497
Uses of this have all been updated to use LLVM_NODISCARD, which
matches the C++17 [[nodiscard]] semantics rather than those of GCC's
__attribute__((warn_unused_result)).
llvm-svn: 284367
Summary:
* Describe new (3.3) parameter attribute group encoding, leaving old encoding there with a note about legacy
* Bring TYPE_BLOCK docs up to date
* Remove docs about obsolete (pre 3.0) TYPE_SYMTAB_BLOCK, TST_CODE_ENTRY
* Fix a couple of incorrect comments and remove one unused enum definition along the way
This addresses https://llvm.org/bugs/show_bug.cgi?id=28941.
Patch by: Ismail Badawi <ibadawi@cisco.com>
Differential Revision: https://reviews.llvm.org/D25623
llvm-svn: 284246
Added relocation names:
- R_AMDGPU_GOTPCREL32_LO
- R_AMDGPU_GOTPCREL32_HI
- R_AMDGPU_REL32_LO
- R_AMDGPU_REL32_HI
AMDGPU isa only supports 32-bit immediates. In order to access 64-bit address we need to generate 32-bit lo/hi relocations, and do the right math (separate patch). Currently we only generate one 32 bit relocation for lower bits for each access, losing higher bits. Hence we need relocations listed above.
Differential Revision: https://reviews.llvm.org/D25546
llvm-svn: 284191
This document describes the proposal to move to GitHub, and
compare the two proposals through various workflow examples,
presenting the current set of commands following by the ones
involved in each of the two proposals.
It is intended to supersede the previous "submodule proposal"
document entirely, and drive the discussion at the BoF during
the next Dev Meeting.
Differential Revision: https://reviews.llvm.org/D24167
llvm-svn: 284077
Summary: We need a new LLVM intrinsic to implement MS _AddressOfReturnAddress builtin on 64-bit Windows.
Reviewers: majnemer, rnk
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D25293
llvm-svn: 284061
Aaron Ballman