be exported from a dylib if their containing object file were linked into one.
No test case: No command line tools query this flag, and there are no Object
unit tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226217 91177308-0d34-0410-b5e6-96231b3b80d8
The change used C++11 features not supported by MSVC 2012. I will fix
the change to use things supported MSVC 2012 and recommit shortly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226216 91177308-0d34-0410-b5e6-96231b3b80d8
IRCE eliminates range checks of the form
0 <= A * I + B < Length
by splitting a loop's iteration space into three segments in a way
that the check is completely redundant in the middle segment. As an
example, IRCE will convert
len = < known positive >
for (i = 0; i < n; i++) {
if (0 <= i && i < len) {
do_something();
} else {
throw_out_of_bounds();
}
}
to
len = < known positive >
limit = smin(n, len)
// no first segment
for (i = 0; i < limit; i++) {
if (0 <= i && i < len) { // this check is fully redundant
do_something();
} else {
throw_out_of_bounds();
}
}
for (i = limit; i < n; i++) {
if (0 <= i && i < len) {
do_something();
} else {
throw_out_of_bounds();
}
}
IRCE can deal with multiple range checks in the same loop (it takes
the intersection of the ranges that will make each of them redundant
individually).
Currently IRCE does not do any profitability analysis. That is a
TODO.
Please note that the status of this pass is *experimental*, and it is
not part of any default pass pipeline. Having said that, I will love
to get feedback and general input from people interested in trying
this out.
Differential Revision: http://reviews.llvm.org/D6693
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TargetLibraryAnalysis pass.
There are actually no direct tests of this already in the tree. I've
added the most basic test that the pass manager bits themselves work,
and the TLI object produced will be tested by an upcoming patches as
they port passes which rely on TLI.
This is starting to point out the awkwardness of the invalidate API --
it seems poorly fitting on the *result* object. I suspect I will change
it to live on the analysis instead, but that's not for this change, and
I'd rather have a few more passes ported in order to have more
experience with how this plays out.
I believe there is only one more analysis required in order to start
porting instcombine. =]
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The pass is really just a means of accessing a cached instance of the
TargetLibraryInfo object, and this way we can re-use that object for the
new pass manager as its result.
Lots of delta, but nothing interesting happening here. This is the
common pattern that is developing to allow analyses to live in both the
old and new pass manager -- a wrapper pass in the old pass manager
emulates the separation intrinsic to the new pass manager between the
result and pass for analyses.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226157 91177308-0d34-0410-b5e6-96231b3b80d8
While the term "Target" is in the name, it doesn't really have to do
with the LLVM Target library -- this isn't an abstraction which LLVM
targets generally need to implement or extend. It has much more to do
with modeling the various runtime libraries on different OSes and with
different runtime environments. The "target" in this sense is the more
general sense of a target of cross compilation.
This is in preparation for porting this analysis to the new pass
manager.
No functionality changed, and updates inbound for Clang and Polly.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226078 91177308-0d34-0410-b5e6-96231b3b80d8
The transform is somewhat involved, but the basic idea is simple: find
derived pointers that have been offset from the base pointer using gep
and replace the relocate of the derived pointer with a gep to the
relocated base pointer (with the same offset).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226060 91177308-0d34-0410-b5e6-96231b3b80d8
This commit moves `MDLocation`, finishing off PR21433. There's an
accompanying clang commit for frontend testcases. I'll attach the
testcase upgrade script I used to PR21433 to help out-of-tree
frontends/backends.
This changes the schema for `DebugLoc` and `DILocation` from:
!{i32 3, i32 7, !7, !8}
to:
!MDLocation(line: 3, column: 7, scope: !7, inlinedAt: !8)
Note that empty fields (line/column: 0 and inlinedAt: null) don't get
printed by the assembly writer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226048 91177308-0d34-0410-b5e6-96231b3b80d8
Sometimes teardown happens before the debug info graph is complete
(e.g., when clang throws an error). In that case, `MDNode`s will still
have RAUW, so deleting constants that the `MDNode`s point at will be
relatively expensive -- it'll cause re-uniquing all up the chain (what
I've been referring to as "teardown madness").
So, drop references *before* deleting constants. We need to drop a few
more references now: the metadata side of the metadata/value bridges
needs to be dropped off the cliff along with the rest of it (previously,
the bridges were cleaned before we did anything with the `MDNode`s).
There's no real functionality change here -- state before and after
`LLVMContextImpl::~LLVMContextImpl()` is unchanged -- so no testcase.
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I haven't looked closely at exactly why the side effect is required, but
this seems better than not mentioning it at all.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226030 91177308-0d34-0410-b5e6-96231b3b80d8
utils/sort_includes.py.
I clearly haven't done this in a while, so more changed than usual. This
even uncovered a missing include from the InstrProf library that I've
added. No functionality changed here, just mechanical cleanup of the
include order.
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Now that the passes are wrappers around this, we no longer need
a vtable, virtual destructor, and other associated mess. This is
particularly nice to me as this is a class template. =]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225970 91177308-0d34-0410-b5e6-96231b3b80d8
This adds the domtree analysis to the new pass manager. The analysis
returns the same DominatorTree result entity used by the old pass
manager and essentially all of the code is shared. We just have
different boilerplate for running and printing the analysis.
I've converted one test to run in both modes just to make sure this is
exercised while both are live in the tree.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225969 91177308-0d34-0410-b5e6-96231b3b80d8
into the new pass manager's analysis cache which stores results
by-value.
Technically speaking, the dom trees were originally not movable but
copyable! This, unsurprisingly, didn't work at all -- the copy was
shallow and just resulted in rampant memory corruption. This change
explicitly forbids copying (as it would need to be a deep copy) and
makes them explicitly movable with the unsurprising boiler plate to
member-wise move them because we can't rely on MSVC to generate this
code for us. =/
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225966 91177308-0d34-0410-b5e6-96231b3b80d8
When processing an array, every Elt has the same layout, it is
useless to recursively call each ComputeLinearIndex on each element.
Just do it once and multiply by the number of elements.
Differential Revision: http://reviews.llvm.org/D6832
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class members are implicitly "inline", no key word needed.
Naturally, this could change how LLVM inlines these functions because
<GRR>, but that's not an excuse to use the keyword. ;]
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225939 91177308-0d34-0410-b5e6-96231b3b80d8
significantly. Clean it up with the help of clang-format.
I've touched this up by hand in a couple of places that weren't quite
right (IMO). I think most of these actually have bugs open about
already.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225938 91177308-0d34-0410-b5e6-96231b3b80d8
Now that the source and destination types can be specified,
allow doing an expansion that doesn't use an EXTLOAD of the
result type. Try to do a legal extload to an intermediate type
and extend that if possible.
This generalizes the special case custom lowering of extloads
R600 has been using to work around this problem.
This also happens to fix a bug that would incorrectly use more
aligned loads than should be used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225925 91177308-0d34-0410-b5e6-96231b3b80d8
A pass that adds random noops to X86 binaries to introduce diversity with the goal of increasing security against most return-oriented programming attacks.
Command line options:
-noop-insertion // Enable noop insertion.
-noop-insertion-percentage=X // X% of assembly instructions will have a noop prepended (default: 50%, requires -noop-insertion)
-max-noops-per-instruction=X // Randomly generate X noops per instruction. ie. roll the dice X times with probability set above (default: 1). This doesn't guarantee X noop instructions.
In addition, the following 'quick switch' in clang enables basic diversity using default settings (currently: noop insertion and schedule randomization; it is intended to be extended in the future).
-fdiversify
This is the llvm part of the patch.
clang part: D3393
http://reviews.llvm.org/D3392
Patch by Stephen Crane (@rinon)
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This adds handling for ExceptionHandling::MSVC, used by the
x86_64-pc-windows-msvc triple. It assumes that filter functions have
already been outlined in either the frontend or the backend. Filter
functions are used in place of the landingpad catch clause type info
operands. In catch clause order, the first filter to return true will
catch the exception.
The C specific handler table expects the landing pad to be split into
one block per handler, but LLVM IR uses a single landing pad for all
possible unwind actions. This patch papers over the mismatch by
synthesizing single instruction BBs for every catch clause to fill in
the EH selector that the landing pad block expects.
Missing functionality:
- Accessing data in the parent frame from outlined filters
- Cleanups (from __finally) are unsupported, as they will require
outlining and parent frame access
- Filter clauses are unsupported, as there's no clear analogue in SEH
In other words, this is the minimal set of changes needed to write IR to
catch arbitrary exceptions and resume normal execution.
Reviewers: majnemer
Differential Revision: http://reviews.llvm.org/D6300
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225904 91177308-0d34-0410-b5e6-96231b3b80d8
It turns out, all callsites of the simplifier are guarded by a check for
CallInst::getCalledFunction (i.e., to make sure the callee is direct).
This check wasn't done when trying to further optimize a simplified fortified
libcall, introduced by a refactoring in r225640.
Fix that, add a testcase, and document the requirement.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225895 91177308-0d34-0410-b5e6-96231b3b80d8
a print method.
This was formulated on a bad idea, but sadly I didn't uncover how bad
this was until I got further down the path. I had hoped that we could
provide a low boilerplate way of printing analyses, but it just doesn't
seem like this really fits the needs of the analyses. Not all analyses
really want to do printing, and those that do don't all use the same
interface. Instead, with the new pass manager let's just take advantage
of the fact that creating an explicit printer pass like the LCG has is
pretty low boilerplate already and rely on that for testing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225861 91177308-0d34-0410-b5e6-96231b3b80d8
I'm adding generic analysis printing utility pass support which will
require such a method (or a specialization) so this will let the
existing printing logic satisfy that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225854 91177308-0d34-0410-b5e6-96231b3b80d8
and expose the necessary hooks in the API directly.
This makes it much cleaner for example to log the usage of a pass
manager from a library. It also makes it more obvious that this
functionality isn't "optional" or "asserts-only" for the pass manager.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225841 91177308-0d34-0410-b5e6-96231b3b80d8
referring to and give them nice comments.
Previously, these were used, but now things use the generic form of the
AnalysisManager.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225833 91177308-0d34-0410-b5e6-96231b3b80d8
This adds assembly and bitcode support for `MDLocation`. The assembly
side is rather big, since this is the first `MDNode` subclass (that
isn't `MDTuple`). Part of PR21433.
(If you're wondering where the mountains of testcase updates are, we
don't need them until I update `DILocation` and `DebugLoc` to actually
use this class.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225830 91177308-0d34-0410-b5e6-96231b3b80d8
This requires a new hook to prevent expanding sqrt in terms
of rsqrt and reciprocal. v_rcp_f32, v_rsq_f32, and v_sqrt_f32 are
all the same rate, so this expansion would just double the number
of instructions and cycles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225828 91177308-0d34-0410-b5e6-96231b3b80d8
Add a new subclass of `UniquableMDNode`, `MDLocation`. This will be the
IR version of `DebugLoc` and `DILocation`. The goal is to rename this
to `DILocation` once the IR classes supersede the `DI`-prefixed
wrappers.
This isn't used anywhere yet. Part of PR21433.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225824 91177308-0d34-0410-b5e6-96231b3b80d8
No functional changes, I'm just going to be doing a lot of work in these files and it would be helpful if they had more current LLVM style.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225817 91177308-0d34-0410-b5e6-96231b3b80d8
While, generally speaking, the process of lowering arguments for a patchpoint
is the same as lowering a regular indirect call, on some targets it may not be
exactly the same. Targets may not, for example, want to add additional register
dependencies that apply only to making cross-DSO calls through linker stubs,
may not want to load additional registers out of function descriptors, and may
not want to add additional side-effect-causing instructions that cannot be
removed later with the call itself being generated.
The PowerPC target will use this in a future commit (for all of the reasons
stated above).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225806 91177308-0d34-0410-b5e6-96231b3b80d8
Some targets, PowerPC for example, have pseudo-registers (such as that used to
represent the rounding mode), that don't have DWARF register numbers or a
register class. These are used only for internal dependency tracking, and
should not appear in the recorded live-outs. This adds a callback allowing the
target to pre-process the live-out mask in order to remove these kinds of
registers so that the StackMaps code does not complain about them and/or
attempt to include them in the output.
This will be used by the PowerPC target in a future commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225805 91177308-0d34-0410-b5e6-96231b3b80d8
a nested class template for the PassModel, and use the T-suffix for the
two typedefs to match the code in the AnalysisManager.
This is the last of the fairly fundamental code cleanups here. Will be
focusing on the printing of analyses next to finish that aspect off.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225785 91177308-0d34-0410-b5e6-96231b3b80d8
of templates in the new pass manager.
The analysis manager is now itself just a template predicated on the IR
unit. This makes lots of the templates really trivial and more clear:
they are all parameterized on a single type, the IR unit's type.
Everything else is a function of that. To me, this is a really nice
cleanup of the APIs and removes a layer of 'magic' and 'indirection'
that really wasn't there and just got in the way of understanding what
is going on here.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225784 91177308-0d34-0410-b5e6-96231b3b80d8
the generic functionality of the pass managers themselves.
In the new infrastructure, the pass "manager" isn't actually interesting
at all. It just pipelines a single chunk of IR through N passes. We
don't need to know anything about the IR or the passes to do this really
and we can replace the 3 implementations of the exact same functionality
with a single generic PassManager template, complementing the single
generic AnalysisManager template.
I've left typedefs in place to give convenient names to the various
obvious instantiations of the template.
With this, I think I've nuked almost all of the redundant logic in the
managers, and I think the overall design is actually simpler for having
single templates that clearly indicate there is no special logic here.
The logging is made somewhat more annoying by this change, but I don't
think the difference is worth having heavy-weight traits to help log
things.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225783 91177308-0d34-0410-b5e6-96231b3b80d8
Peephole optimizer is scanning a basic block forward. At some point it
needs to answer the question "given a pointer to an MI in the current
BB, is it located before or after the current instruction".
To perform this, it keeps a set of the MIs already seen during the scan,
if a MI is not in the set, it is assumed to be after.
It means that newly created MIs have to be inserted in the set as well.
This commit passes the set as an argument to the target-dependent
optimizeSelect() so that it can properly update the set with the
(potentially) newly created MIs.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225772 91177308-0d34-0410-b5e6-96231b3b80d8
The functions {pred,succ,use,user}_{begin,end} exist, but many users
have to check *_begin() with *_end() by hand to determine if the
BasicBlock or User is empty. Fix this with a standard *_empty(),
demonstrating a few usecases.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225760 91177308-0d34-0410-b5e6-96231b3b80d8
template.
This consolidates three copies of nearly the same core logic. It adds
"complexity" to the ModuleAnalysisManager in that it makes it possible
to share a ModuleAnalysisManager across multiple modules... But it does
so by deleting *all of the code*, so I'm OK with that. This will
naturally make fixing bugs in this code much simpler, etc.
The only down side here is that we have to use 'typename' and 'this->'
in various places, and the implementation is lifted into the header.
I'll take that for the code size reduction.
The convenient names are still typedef-ed and used throughout so that
users can largely ignore this aspect of the implementation.
The follow-up change to this will do the exact same refactoring for the
PassManagers. =D
It turns out that the interesting different code is almost entirely in
the adaptors. At the end, that should be essentially all that is left.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225757 91177308-0d34-0410-b5e6-96231b3b80d8
