This patch adds a simple const_iterator implementation for SmallSet by
delegating to either a SmallVector::const_iterator or
std::set::const_iterator, depending on which storage is used by the
SmallSet.
Reviewers: dblaikie, craig.topper
Reviewed By: dblaikie
Differential Revision: https://reviews.llvm.org/D47942
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334887 91177308-0d34-0410-b5e6-96231b3b80d8
This simplifies some code which had StringRefs to begin with, and
makes other code more complicated which had const char* to begin
with.
In the end, I think this makes for a more idiomatic and platform
agnostic API. Not all platforms launch process with null terminated
c-string arrays for the environment pointer and argv, but the api
was designed that way because it allowed easy pass-through for
posix-based platforms. There's a little additional overhead now
since on posix based platforms we'll be takign StringRefs which
were constructed from null terminated strings and then copying
them to null terminate them again, but from a readability and
usability standpoint of the API user, I think this API signature
is strictly better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334518 91177308-0d34-0410-b5e6-96231b3b80d8
This is a recommit of r333506, which was reverted in r333518.
The original commit message is below.
In r325551 many calls of malloc/calloc/realloc were replaces with calls of
their safe counterparts defined in the namespace llvm. There functions
generate crash if memory cannot be allocated, such behavior facilitates
handling of out of memory errors on Windows.
If the result of *alloc function were checked for success, the function was
not replaced with the safe variant. In these cases the calling function made
the error handling, like:
T *NewElts = static_cast<T*>(malloc(NewCapacity*sizeof(T)));
if (NewElts == nullptr)
report_bad_alloc_error("Allocation of SmallVector element failed.");
Actually knowledge about the function where OOM occurred is useless. Moreover
having a single entry point for OOM handling is convenient for investigation
of memory problems. This change removes custom OOM errors handling and
replaces them with calls to functions `llvm::safe_*alloc`.
Declarations of `safe_*alloc` are moved to a separate include file, to avoid
cyclic dependency in SmallVector.h
Differential Revision: https://reviews.llvm.org/D47440
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334344 91177308-0d34-0410-b5e6-96231b3b80d8
Summary: Add `StringRef::rsplit(StringRef Separator)` to achieve the function of getting the tail substring according to the separator. A typical usage is to get `data` in `std::basic_string::data`.
Reviewers: mehdi_amini, zturner, beanz, xbolva00, vsk
Reviewed By: zturner, xbolva00, vsk
Subscribers: vsk, xbolva00, llvm-commits, MTC
Differential Revision: https://reviews.llvm.org/D47406
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334283 91177308-0d34-0410-b5e6-96231b3b80d8
Because immutable data structures are, well, immutable, methods like "append",
"add", "set" create a copy of the list (set, map) instead of mutating the
existing map. If the updated object is discarded, it clearly indicates a bug.
Such bugs are introduced frequently, hence the warn_unused_result annotation.
Differential Revision: https://reviews.llvm.org/D47496
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333672 91177308-0d34-0410-b5e6-96231b3b80d8
As noted by Adrian on llvm-commits, PrintHTMLEscaped and PrintEscaped in
StringExtras did not conform to the LLVM coding guidelines. This commit
rectifies that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333669 91177308-0d34-0410-b5e6-96231b3b80d8
When printing string in the Plist, we weren't escaping the characters
which lead to invalid XML. This patch adds the escape logic to
StringExtras.
rdar://39785334
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333565 91177308-0d34-0410-b5e6-96231b3b80d8
This is a recommit of r333390, which was reverted in r333395, because it
caused cyclic dependency when building shared library `LLVMDemangle.so`.
In this commit `ItaniumDemangler.cpp` was not changed.
The original commit message is below.
In r325551 many calls of malloc/calloc/realloc were replaces with calls of
their safe counterparts defined in the namespace llvm. There functions
generate crash if memory cannot be allocated, such behavior facilitates
handling of out of memory errors on Windows.
If the result of *alloc function were checked for success, the function was
not replaced with the safe variant. In these cases the calling function made
the error handling, like:
T *NewElts = static_cast<T*>(malloc(NewCapacity*sizeof(T)));
if (NewElts == nullptr)
report_bad_alloc_error("Allocation of SmallVector element failed.");
Actually knowledge about the function where OOM occurred is useless. Moreover
having a single entry point for OOM handling is convenient for investigation
of memory problems. This change removes custom OOM errors handling and
replaces them with calls to functions `llvm::safe_*alloc`.
Declarations of `safe_*alloc` are moved to a separate include file, to avoid
cyclic dependency in SmallVector.h
Differential Revision: https://reviews.llvm.org/D47440
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333506 91177308-0d34-0410-b5e6-96231b3b80d8
In r325551 many calls of malloc/calloc/realloc were replaces with calls of
their safe counterparts defined in the namespace llvm. There functions
generate crash if memory cannot be allocated, such behavior facilitates
handling of out of memory errors on Windows.
If the result of *alloc function were checked for success, the function was
not replaced with the safe variant. In these cases the calling function made
the error handling, like:
T *NewElts = static_cast<T*>(malloc(NewCapacity*sizeof(T)));
if (NewElts == nullptr)
report_bad_alloc_error("Allocation of SmallVector element failed.");
Actually knowledge about the function where OOM occurred is useless. Moreover
having a single entry point for OOM handling is convenient for investigation
of memory problems. This change removes custom OOM errors handling and
replaces them with calls to functions `llvm::safe_*alloc`.
Declarations of `safe_*alloc` are moved to a separate include file, to avoid
cyclic dependency in SmallVector.h
Differential Revision: https://reviews.llvm.org/D47440
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@333390 91177308-0d34-0410-b5e6-96231b3b80d8
This commit adds a wrapper for std::distance() which works with ranges.
As it would be a common case to write `distance(predecessors(BB))`, this
also introduces `pred_size()` and `succ_size()` helpers to make that
easier to write.
Differential Revision: https://reviews.llvm.org/D46668
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332057 91177308-0d34-0410-b5e6-96231b3b80d8
This is a follow-up to r331272.
We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.
Patch produced by
for i in $(git grep -l '\@brief'); do perl -pi -e 's/\@brief //g' $i & done
https://reviews.llvm.org/D46290
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331275 91177308-0d34-0410-b5e6-96231b3b80d8
We've been running doxygen with the autobrief option for a couple of
years now. This makes the \brief markers into our comments
redundant. Since they are a visual distraction and we don't want to
encourage more \brief markers in new code either, this patch removes
them all.
Patch produced by
for i in $(git grep -l '\\brief'); do perl -pi -e 's/\\brief //g' $i & done
Differential Revision: https://reviews.llvm.org/D46290
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@331272 91177308-0d34-0410-b5e6-96231b3b80d8
This makes it possible to reverse a filtered range. For example, here's
a way to visit memory accesses in a BasicBlock in reverse order:
auto MemInsts = reverse(make_filter_range(BB, [](Instruction &I) {
return isa<StoreInst>(&I) || isa<LoadInst>(&I);
}));
for (auto &MI : MemInsts)
...
To implement this functionality, I factored out forward iteration
functionality into filter_iterator_base, and added a specialization of
filter_iterator_impl which supports bidirectional iteration. Thanks to
Tim Shen, Zachary Turner, and others for suggesting this design and
providing feedback! This version of the patch supersedes the original
(https://reviews.llvm.org/D45792).
This was motivated by a problem we encountered in D45657: we'd like to
visit the non-debug-info instructions in a BasicBlock in reverse order.
Testing: check-llvm, check-clang
Differential Revision: https://reviews.llvm.org/D45853
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330875 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
It was removed about a year ago in r300477. Bring it back, along with
its unittest, when the MSVC STL is in use. The MSVC STL performs
self-assignment in std::shuffle. These days, llvm::sort calls
std::shuffle when expensive checks are enabled to help find
non-determinism bugs.
Reviewers: craig.topper, chandlerc
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D46028
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330776 91177308-0d34-0410-b5e6-96231b3b80d8
Richard Smith noted that `typedef typename iplist::iplist_impl_type
iplist_impl_type` is incorrect, per
http://eel.is/c++draft/basic.scope#class-2
It seems that neither clang nor gcc get too angry about this, but a
newer version of msvc does.
Thanks to jcmac on IRC for pointing this out!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330639 91177308-0d34-0410-b5e6-96231b3b80d8
Previously MapVector assumed `Map::mapped_type` was `unsigned`.
This caused problems when using MapVector with a user-specified
map where this didn't hold (For example StringMap<unsigned>).
This patch adjusts MapVector to use the same type as the underlying
map, avoiding reference binding errors in functions like `insert`.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329523 91177308-0d34-0410-b5e6-96231b3b80d8
- Remove use of the opencl and amdopencl environment member of the target triple for the AMDGPU target.
- Use function attribute to communicate to the AMDGPU backend to add implicit arguments for OpenCL kernels for the AMDHSA OS.
Differential Revision: https://reviews.llvm.org/D43736
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328349 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
std::sort and array_pod_sort both use non-stable sorting algorithms.
This means that the relative order of elements with the same key is
undefined. This patch is an attempt to uncover such scenarios by
randomly shuffling all containers before sorting, if EXPENSIVE_CHECKS
is enabled.
Here's the bugzilla for this: https://bugs.llvm.org/show_bug.cgi?id=35135
Reviewers: dblaikie, dexonsmith, chandlerc, efriedma, RKSimon
Reviewed By: RKSimon
Subscribers: fhahn, davide, RKSimon, vsk, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D39245
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327219 91177308-0d34-0410-b5e6-96231b3b80d8
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
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327163 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
Most of the time, compiler statistics can be obtained using a process that
performs a single compilation and terminates such as llc. However, this isn't
always the case. JITs for example, perform multiple compilations over their
lifetime and STATISTIC() will record cumulative values across all of them.
Provide tools like this with the facilities needed to measure individual
compilations by allowing them to reset the STATISTIC() values back to zero using
llvm::ResetStatistics(). It's still the tools responsibility to ensure that they
perform compilations in such a way that the results are meaningful to their
intended use.
Reviewers: qcolombet, rtereshin, bogner, aditya_nandakumar
Reviewed By: bogner
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D44181
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326981 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
It can be useful for tools to be able to retrieve the values of variables
declared via STATISTIC() directly without having to emit them and parse
them back. Use cases include:
* Needing to report specific statistics to a test harness
* Wanting to post-process statistics. For example, to produce a percentage of
functions that were fully selected by GlobalISel
Make this possible by adding llvm::GetStatistics() which returns an
iterator_range that can be used to inspect the statistics that have been
touched during execution. When statistics are disabled (NDEBUG and not
LLVM_ENABLE_STATISTICS) this method will return an empty range.
This patch doesn't address the effect of multiple compilations within the same
process. In such situations, the statistics will be cumulative for all
compilations up to the GetStatistics() call.
Reviewers: qcolombet, rtereshin, aditya_nandakumar, bogner
Reviewed By: rtereshin, bogner
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D43901
This re-commit fixes a missing include of <vector> which it seems clang didn't
mind but G++ and MSVC objected to. It seems that, clang was ok with std::vector
only being forward declared at the point of use since it was fully defined
eventually but G++/MSVC both rejected it at the point of use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326738 91177308-0d34-0410-b5e6-96231b3b80d8
Despite building cleanly on my machine in three separate configs, it's failing on pretty much all bots due to missing includes among other things. Investigating.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326726 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
It can be useful for tools to be able to retrieve the values of variables
declared via STATISTIC() directly without having to emit them and parse
them back. Use cases include:
* Needing to report specific statistics to a test harness
* Wanting to post-process statistics. For example, to produce a percentage of
functions that were fully selected by GlobalISel
Make this possible by adding llvm::GetStatistics() which returns an
iterator_range that can be used to inspect the statistics that have been
touched during execution. When statistics are disabled (NDEBUG and not
LLVM_ENABLE_STATISTICS) this method will return an empty range.
This patch doesn't address the effect of multiple compilations within the same
process. In such situations, the statistics will be cumulative for all
compilations up to the GetStatistics() call.
Reviewers: qcolombet, rtereshin, aditya_nandakumar, bogner
Reviewed By: rtereshin, bogner
Subscribers: llvm-commits, mgorny
Differential Revision: https://reviews.llvm.org/D43901
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326723 91177308-0d34-0410-b5e6-96231b3b80d8
Emulated TLS is enabled by llc flag -emulated-tls,
which is passed by clang driver.
When llc is called explicitly or from other drivers like LTO,
missing -emulated-tls flag would generate wrong TLS code for targets
that supports only this mode.
Now use useEmulatedTLS() instead of Options.EmulatedTLS to decide whether
emulated TLS code should be generated.
Unit tests are modified to run with and without the -emulated-tls flag.
Differential Revision: https://reviews.llvm.org/D42999
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326341 91177308-0d34-0410-b5e6-96231b3b80d8
This change improves incremental rebuild performance on dual Xeon 8168
machines by 54%. This change also improves run time code gen by not
forcing the case values to be lvalues.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326109 91177308-0d34-0410-b5e6-96231b3b80d8
This patch removes the HashString function from StringExtraces and
replaces its uses with calls to djbHash from DJB.h.
This change is *almost* NFC. While the algorithm is identical, the
djbHash implementation in StringExtras used 0 as its default seed while
the implementation in DJB uses 5381. The latter has been shown to result
in less collisions and improved avalanching and is used by the DWARF
accelerator tables.
Because some test were implicitly relying on the hash order, I've
reverted to using zero as a seed for the following two files:
lld/include/lld/Core/SymbolTable.h
llvm/lib/Support/StringMap.cpp
Differential revision: https://reviews.llvm.org/D43615
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326091 91177308-0d34-0410-b5e6-96231b3b80d8
It looks like some of our tests depend on the ordering of hashed values.
I'm reverting my changes while I try to reproduce and fix this locally.
Failing builds:
lab.llvm.org:8011/builders/lld-x86_64-darwin13/builds/18388
lab.llvm.org:8011/builders/clang-cmake-x86_64-sde-avx512-linux/builds/6743
lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/15607
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326082 91177308-0d34-0410-b5e6-96231b3b80d8
This removes the HashString function from StringExtraces and replaces
its uses with calls to djbHash from DJB.h
This is *almost* NFC. While the algorithm is identical, the djbHash
implementation in StringExtras used 0 as its seed while the
implementation in DJB uses 5381. The latter has been shown to result in
less collisions and improved avalanching.
https://reviews.llvm.org/D43615
(cherry picked from commit 77f7f965bc9499a9ae768a296ca5a1f7347d1d2c)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326081 91177308-0d34-0410-b5e6-96231b3b80d8
This is the second part of recommit of r325224. The previous part was
committed in r325426, which deals with C++ memory allocation. Solution
for C memory allocation involved functions `llvm::malloc` and similar.
This was a fragile solution because it caused ambiguity errors in some
cases. In this commit the new functions have names like `llvm::safe_malloc`.
The relevant part of original comment is below, updated for new function
names.
Analysis of fails in the case of out of memory errors can be tricky on
Windows. Such error emerges at the point where memory allocation function
fails, but manifests itself when null pointer is used. These two points
may be distant from each other. Besides, next runs may not exhibit
allocation error.
In some cases memory is allocated by a call to some of C allocation
functions, malloc, calloc and realloc. They are used for interoperability
with C code, when allocated object has variable size and when it is
necessary to avoid call of constructors. In many calls the result is not
checked for null pointer. To simplify checks, new functions are defined
in the namespace 'llvm': `safe_malloc`, `safe_calloc` and `safe_realloc`.
They behave as corresponding standard functions but produce fatal error if
allocation fails. This change replaces the standard functions like 'malloc'
in the cases when the result of the allocation function is not checked
for null pointer.
Finally, there are plain C code, that uses malloc and similar functions. If
the result is not checked, assert statement is added.
Differential Revision: https://reviews.llvm.org/D43010
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325551 91177308-0d34-0410-b5e6-96231b3b80d8
Analysis of fails in the case of out of memory errors can be tricky on
Windows. Such error emerges at the point where memory allocation function
fails, but manifests itself when null pointer is used. These two points
may be distant from each other. Besides, next runs may not exhibit
allocation error.
Usual programming practice does not require checking result of 'operator
new' because it throws 'std::bad_alloc' in the case of allocation error.
However, LLVM is usually built with exceptions turned off, so 'new' can
return null pointer. This change installs custom new handler, which causes
fatal error in the case of out of memory. The handler is installed
automatically prior to call to 'main' during construction of a static
object defined in 'lib/Support/ErrorHandling.cpp'. If the application does
not use this file, the handler may be installed manually by a call to
'llvm::install_out_of_memory_new_handler', declared in
'include/llvm/Support/ErrorHandling.h".
There are calls to C allocation functions, malloc, calloc and realloc.
They are used for interoperability with C code, when allocated object has
variable size and when it is necessary to avoid call of constructors. In
many calls the result is not checked against null pointer. To simplify
checks, new functions are defined in the namespace 'llvm' with the
same names as these C function. These functions produce fatal error if
allocation fails. User should use 'llvm::malloc' instead of 'std::malloc'
in order to use the safe variant. This change replaces 'std::malloc'
in the cases when the result of allocation function is not checked against
null pointer.
Finally, there are plain C code, that uses malloc and similar functions. If
the result is not checked, assert statements are added.
Differential Revision: https://reviews.llvm.org/D43010
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325224 91177308-0d34-0410-b5e6-96231b3b80d8
This is a bit faster in theory, in practice it's cold code that's only
active in !NDEBUG, so it probably doesn't make a difference. This is one
of the last users of our homegrown Atomic.h.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323999 91177308-0d34-0410-b5e6-96231b3b80d8
Summary:
This change is mostly adding comments to GraphTraits describing
interfaces to iterate over children edges of a node. These will
have to be implemented by specializations of GraphTraits. The
non-comment change is the addition of children_edges template
function that returns an iterator range.
The motivation for this is to use it in synthetic count propagation
algorithm and remove the CallGraphTraits class that provide similar
interfaces.
Reviewers: dberlin, davidxl
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D42698
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323990 91177308-0d34-0410-b5e6-96231b3b80d8
This brings it in line with std::optional. My recent changes to
make Optional of trivial types trivially copyable introduced
diverging behavior depending on the type, which is bad. Now all
types have the same moving behavior.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323445 91177308-0d34-0410-b5e6-96231b3b80d8
While the memmove workaround fixed it for GCC 6.3. GCC 4.8 and GCC 7.1
are still broken. I have no clue what's going on, just blacklist GCC for
now.
Needless to say this code is ubsan, asan and msan-clean.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322862 91177308-0d34-0410-b5e6-96231b3b80d8
I've seen random crashes with GCC 4.8, GCC 6.3 and GCC 7.3, triggered by
my Optional change. All of them affect a different set of targets. This
change fixes the instance of the problem I'm seeing on my local machine,
let's hope it's good enough for the other instances too.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322859 91177308-0d34-0410-b5e6-96231b3b80d8
This makes uses of Optional more transparent to the compiler (and
clang-tidy) and generates slightly smaller code.
This is a re-land of r317019, which had issues with GCC 4.8 back then.
Those issues don't reproduce anymore, but I'll watch the buildbots
closely in case anything goes wrong.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322838 91177308-0d34-0410-b5e6-96231b3b80d8
