Not sure how I missed that in my testing, but obvious enough - this
causes segfaults when attempting to dereference the Error in end
iterators.
llvm-svn: 348814
m_loc_is_constant_data was uninitialized, so unless someone
explicitly called SetLocIsConstantData(), this would be UB.
I think every existing call-site would always call the proper
function to initialize the value, so there were no existing
bugs, but I encountered this when I tried to use it without
calling this function and encountered this.
llvm-svn: 348813
Using an Error as an out parameter from an indirect operation like
iteration as described in the documentation (
http://llvm.org/docs/ProgrammersManual.html#building-fallible-iterators-and-iterator-ranges
) seems to be a little fussy - so here's /one/ possible solution, though
I'm not sure it's the right one.
Alternatively such APIs may be better off being switched to a standard
algorithm style, where they take a lambda to do the iteration work that
is then called back into (eg: "Error e = obj.for_each_note([](const
Note& N) { ... });"). This would be safer than having an unwritten
assumption that the user of such an iteration cannot return early from
the inside of the function - and must always exit through the gift
shop... I mean error checking. (even though it's guaranteed that if
you're mid-way through processing an iteration, it's not in an error
state).
Alternatively we'd need some other (the super untrustworthy/thing we've
generally tried to avoid) error handling primitive that actually clears
the error state entirely so it's safe to ignore.
Fleshed this solution out a bit further during review - it now relies on
op==/op!= comparison as the equivalent to "if (Err)" testing the Error.
So just like an Error must be checked (even if it's in a success state),
the Error hiding in the iterator must be checked after each increment
(including by comparison with another iterator - perhaps this could be
constrained to only checking if the iterator is compared to the end
iterator? Not sure it's too important).
So now even just creating the iterator and not incrementing it at all
should still assert because the Error has not been checked.
Reviewers: lhames, jakehehrlich
Differential Revision: https://reviews.llvm.org/D55235
llvm-svn: 348811
Mucking about simplifying a test case ( https://reviews.llvm.org/D55261 ) I stumbled across something I've hit before - that LLVM's (GCC's does too, FWIW) assembly output includes a hardcode length for a DWARF unit in its header. Instead we could emit a label difference - making the assembly easier to read/edit (though potentially at a slight (I haven't tried to observe it) performance cost of delaying/sinking the length computation into the MC layer).
Reviewers: JDevlieghere, probinson, ABataev
Differential Revision: https://reviews.llvm.org/D55281
llvm-svn: 348806
A dependency on TestingSupport was introduced in rL348735 but
library was not incldued in the LLVM_LINK_LLVM_DYLIB build.
Differential Revision: https://reviews.llvm.org/D55526
llvm-svn: 348803
- Check if an operand is an immediate before calling getImm. Some operands
that take constant values can actually have global symbols or other
constant expressions.
- When a load-constant instruction can be folded into users, make sure to
only delete it when all users have been successfully converted.
llvm-svn: 348802
Summary: Don't add a child just for the label.
Reviewers: aaron.ballman
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D55495
llvm-svn: 348794
Summary:
Almost all code review comments on new checkers {D55433} {D48866} {D54349} seem to ask for the release notes to be added alphabetically, plus I've seen commits by @Eugene.Zelenko reordering the lists
Make add_new_check.py add those release notes alphabetically based on checker name
If include-fixer section is seen add it at the end
Minor change in the message format to prevent double newlines added before the checker.
Do the tools themselves have unit tests? (sorry new to this game)
- Tested adding new checker at the beginning
- Tested on adding new checker in the middle
- Tested on empty ReleasesNotes.rst (as we would see after RC)
Patch by MyDeveloperDay.
Reviewers: alexfh, JonasToth, curdeius, aaron.ballman, benhamilton, hokein
Reviewed By: JonasToth
Subscribers: cfe-commits, xazax.hun, Eugene.Zelenko
Tags: #clang-tools-extra
Differential Revision: https://reviews.llvm.org/D55508
llvm-svn: 348793
Summary: The APFloat and Constant APIs taking an APInt allow arbitrary payloads,
and that's great. There's a convenience API which takes an unsigned, and that's
silly because it then directly creates a 64-bit APInt. Just change it to 64-bits
directly.
At the same time, add ConstantFP NaN getters which match the APFloat ones (with
getQNaN / getSNaN and APInt parameters).
Improve the APFloat testing to set more payload bits.
Reviewers: scanon, rjmccall
Subscribers: jkorous, dexonsmith, kristina, llvm-commits
Differential Revision: https://reviews.llvm.org/D55460
llvm-svn: 348791
Implement support for try-catch blocks in constexpr functions, as
proposed in http://wg21.link/P1002 and voted in San Diego for c++20.
The idea is that we can still never throw inside constexpr, so the catch
block is never entered. A try-catch block like this:
try { f(); } catch (...) { }
is then morally equivalent to just
{ f(); }
Same idea should apply for function/constructor try blocks.
rdar://problem/45530773
Differential Revision: https://reviews.llvm.org/D55097
llvm-svn: 348789
This patch restricts the capability of G_MERGE_VALUES, and uses the new
G_BUILD_VECTOR and G_CONCAT_VECTORS opcodes instead in the appropriate places.
This patch also includes AArch64 support for selecting G_BUILD_VECTOR of <4 x s32>
and <2 x s64> vectors.
Differential Revisions: https://reviews.llvm.org/D53629
llvm-svn: 348788
If all the demanded elements of the SimplifyDemandedVectorElts are known to be UNDEF, we can simplify to an ISD::UNDEF node.
Zero constant folding will be handled in a future patch - its a little trickier as we often have bitcasted zero values.
Differential Revision: https://reviews.llvm.org/D55511
llvm-svn: 348784
Fix two build issues:
1) Recent commit 348756 accidentally included Unix clang compilers
to use immintrin.h when only clang-cl should be using it leading
to the following error:
openmp-llvm/runtime/src/kmp_lock.cpp:2035:25: error: always_
inline function '_xbegin' requires target feature 'rtm', but would be inlined into function
'__kmp_test_adaptive_lock_only' that is compiled without support for 'rtm'
kmp_uint32 status = _xbegin();
This patch changes the guard to use immintrin.h to only use clang-cl instead of all clang
2) gcc-8 gives a warning about multiline comment in kmp_runtime.cpp:
This patch just changes it to a two line comment
openmp-llvm/runtime/src/kmp_runtime.cpp:7697:8: warning: multi-line comment [-Wcomment]
#endif // KMP_OS_LINUX || KMP_OS_DRAGONFLY || KMP_OS_FREEBSD || KMP_OS_NETBSD \
llvm-svn: 348783
As discussed on D55511, this caused an issue if the inner node deletes a node that the outer node depends upon. As it doesn't affect any lit-tests and I've only been able to expose this with the D55511 change I'm committing this now.
llvm-svn: 348781
Patch from Jordan Soyke (jsoyke@google.com)
Reviewed as D55520
This change adds a new internal class, called __value_func, that adds
a minimal subset of value-type semantics to the internal __func interface.
The change is NFC, and is cleanup for the upcoming ABI v2 function implementation (D55045).
llvm-svn: 348778
Summary:
SSE2 vectorization was added in 2012, but it is 2018 now and I can't
observe any performance boost (testing clang -E [all Sema/* CodeGen/* with proper -I options]) with the existing _mm_movemask_epi8+countTrailingZeros or the following SSE4.2 (compiling with -msse4.2):
__m128i C = _mm_setr_epi8('\r','\n',0,0,0,0,0,0,0,0,0,0,0,0,0,0);
_mm_cmpestri(C, 2, Chunk, 16, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_POSITIVE_POLARITY | _SIDD_LEAST_SIGNIFICANT)
Delete the vectorization to simplify the code.
Also simplify the code a bit and don't check the line ending sequence \n\r
Reviewers: bkramer, #clang
Reviewed By: bkramer
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D55484
llvm-svn: 348777
This should really be generalized to allow increment and/or
we should replace it by using ISD::matchUnaryPredicate().
See D55515 for context.
llvm-svn: 348776
Summary: Instead use a more reasonable value to start and rely on the fact that SmallString will resize if necessary.
Reviewers: labath, asmith
Reviewed By: labath
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D55457
llvm-svn: 348775
Refactor the scheduling predicates based on `MCInstPredicate`. In this
case, for the Exynos processors.
Differential revision: https://reviews.llvm.org/D55345
llvm-svn: 348774
This re-commits r348592, which was reverted due to a failing test on
macos.
The issue was that I was passing a null pointer for the
"CreateMemoryInstance" callback when registering ObjectFileBreakpad,
which caused crashes when attemping to load modules from memory. The
correct thing to do is to pass a callback which always returns a null
pointer (as breakpad files are never loaded in inferior memory).
It turns out that there is only one test which exercises this code path,
and it's mac-only, so I've create a new test which should run everywhere
(except windows, as one cannot delete an executable which is being run).
Unfortunately, this test still fails on linux for other reasons, but at
least it gives us something to aim for.
The original commit message was:
This patch adds the scaffolding necessary for lldb to recognise symbol
files generated by breakpad. These (textual) files contain just enough
information to be able to produce a backtrace from a crash
dump. This information includes:
- UUID, architecture and name of the module
- line tables
- list of symbols
- unwind information
A minimal breakpad file could look like this:
MODULE Linux x86_64 0000000024B5D199F0F766FFFFFF5DC30 a.out
INFO CODE_ID 00000000B52499D1F0F766FFFFFF5DC3
FILE 0 /tmp/a.c
FUNC 1010 10 0 _start
1010 4 4 0
1014 5 5 0
1019 5 6 0
101e 2 7 0
PUBLIC 1010 0 _start
STACK CFI INIT 1010 10 .cfa: $rsp 8 + .ra: .cfa -8 + ^
STACK CFI 1011 $rbp: .cfa -16 + ^ .cfa: $rsp 16 +
STACK CFI 1014 .cfa: $rbp 16 +
Even though this data would normally be considered "symbol" information,
in the current lldb infrastructure it is assumed every SymbolFile object
is backed by an ObjectFile instance. So, in order to better interoperate
with the rest of the code (particularly symbol vendors).
In this patch I just parse the breakpad header, which is enough to
populate the UUID and architecture fields of the ObjectFile interface.
The rough plan for followup patches is to expose the individual parts of
the breakpad file as ObjectFile "sections", which can then be used by
other parts of the codebase (SymbolFileBreakpad ?) to vend the necessary
information.
Reviewers: clayborg, zturner, lemo, amccarth
Subscribers: mgorny, fedor.sergeev, markmentovai, lldb-commits
Differential Revision: https://reviews.llvm.org/D55214
llvm-svn: 348773
Summary:
Use the original shuffle implementation for __kmpc_shuffle_int64 since
default implementation uses the same implementation.
Reviewers: gtbercea
Subscribers: guansong, caomhin, openmp-commits
Differential Revision: https://reviews.llvm.org/D55514
llvm-svn: 348772
This commit changes which l1 flush instruction is used for AMDPAL and
MESA3d workloads to flush the entire l1 cache instead of just the
volatile lines.
Differential Revision: https://reviews.llvm.org/D55367
llvm-svn: 348771
Refactor the scheduling predicates based on `MCInstPredicate`. Augment the
number of helper predicates used by processor specific predicates.
Differential revision: https://reviews.llvm.org/D55375
llvm-svn: 348768
David Blaikie