This basically reverts r280696 in favor of using extra patterns as mentioned as an alternative in that commit message. For now I've only added the cases we have test cases for, but it should be easy to add more in the future.
This will help to convert VPERMI2PS/VPERMT2PS intrinsics to use a single ISD node opcode. And hopefully allow some intrinsics to be removed.
llvm-svn: 333365
Summary:
For a block with WQM on entry and exit and containing no exact mode
code, but containing some WWM code, the WQM pass forgot to process the
block at all and so did not insert code to enter and leave WWM.
This commit fixes that.
Subscribers: arsenm, kzhuravl, wdng, nhaehnle, yaxunl, dstuttard, t-tye, llvm-commits
Differential Revision: https://reviews.llvm.org/D47027
Change-Id: I044792eead1293bed4203fb26ce75f47878afeb6
llvm-svn: 333362
Upcoming changes to FileCheck will modify CHECK-DAG to not match
overlapping regions of the input. This test was found to be affected
because it expects to find four threads to invoke events of type
ompt_event_implicit_task_begin. It turns out this is wrong because
OMP_THREAD_LIMIT is set to 2, so there are only two threads. The
rest of the test got it right so it went unnoticed until now.
(Rewrite test and apply clang-format to it as discussed in the past.)
Differential Revision: https://reviews.llvm.org/D47119
llvm-svn: 333361
This is a simple implementation of the unroll-and-jam classical loop
optimisation.
The basic idea is that we take an outer loop of the form:
for i..
ForeBlocks(i)
for j..
SubLoopBlocks(i, j)
AftBlocks(i)
Instead of doing normal inner or outer unrolling, we unroll as follows:
for i... i+=2
ForeBlocks(i)
ForeBlocks(i+1)
for j..
SubLoopBlocks(i, j)
SubLoopBlocks(i+1, j)
AftBlocks(i)
AftBlocks(i+1)
Remainder
So we have unrolled the outer loop, then jammed the two inner loops into
one. This can lead to a simpler inner loop if memory accesses can be shared
between the now-jammed loops.
To do this we have to prove that this is all safe, both for the memory
accesses (using dependence analysis) and that ForeBlocks(i+1) can move before
AftBlocks(i) and SubLoopBlocks(i, j).
Differential Revision: https://reviews.llvm.org/D41953
llvm-svn: 333358
The argument was used as an additional negative condition and can be
expressed in the if conditional without needing to pass it down.
Update bss commentary around main use.
llvm-svn: 333357
Summary:
FastDemangle gives us a C-string that we own (which is allocated in SymbolDemangler::GetDemangledCopy).
As we are not deleting the string, we leak memory whenever we call SubsPrimitiveParmItanium.
Reviewers: javed.absar
Subscribers: kristof.beyls, chrib, lldb-commits
Differential Revision: https://reviews.llvm.org/D47418
llvm-svn: 333353
That's r333325, as well as follow-up "Fix GCC handling of ATOMIC_VAR_INIT"
r333327.
Marshall asked to revert:
Let's have a discussion about how to implement this so that it is more friendly
to people with installed code bases. We've had *extremely* loud responses to
unilaterally adding warnings - especially ones that can't be easily disabled -
to the libc++ code base in the past.
llvm-svn: 333351
When requesting to dump both the parent chain and children, we used to
print the DIE more than once because we propagated the dump options to
the parent without clearing the respective flags. This commit fixes this
oversight and adds a test.
rdar://39415292
Differential revision: https://reviews.llvm.org/D47263
llvm-svn: 333350
Summary:
We only need to use 512 bit vectors all the way through v8i64 reductions since those max instructions are new to avx512f and only available in 512 bits until SKX.
For v16i32 and floating point we have legacy 128/256 bit instructions we can use.
I've tried to use other intrinsics to reduce the verbosity of the code and avoid having to mention all the shuffles. I've also removed all the -1 shuffle indices so the output sequence is fully specified and not left to backend optimization.
Reviewers: RKSimon, spatel, GBuella
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D47401
llvm-svn: 333347
Summary: When compiling with modules, these missing includes cause the build to fail (as the header can't be compiled into a module).
Subscribers: ki.stfu, lldb-commits
Differential Revision: https://reviews.llvm.org/D47412
llvm-svn: 333345
Summary: This resolves unnecessary the header dependency from
Core to DataFormatters. Patch is necessary for the introduction of
C++ modules to the LLDB build system.
Subscribers: lldb-commits
Differential Revision: https://reviews.llvm.org/D47409
llvm-svn: 333342
Fix a few more bot failures due to r333335:
- don't match path other than file name, since the delimiter is
different for Windows
- The summary IDs in thinlto-function-summary-refgraph.ll may vary
and therefore can't be matched exactly, because the ordering depends
on the iteration order of the index map which is keyed by GUID. The GUID
for private values will depend on the path.
llvm-svn: 333338
Summary:
Implements AsmWriter support for printing the module summary index to
assembly with the format discussed in the RFC "LLVM Assembly format for
ThinLTO Summary".
Implements just enough of the parsing support to recognize and ignore
the summary entries. As agreed in the RFC thread, this will be the
behavior when assembling the IR. A follow on change will implement
parsing/assembling of the summary entries for use by tools that
currently build the summary index from bitcode.
Reviewers: dexonsmith, pcc
Subscribers: inglorion, eraman, steven_wu, dblaikie, llvm-commits
Differential Revision: https://reviews.llvm.org/D46699
llvm-svn: 333335
Style guide says `else`s after returns are iffy, and I agree. I also
don't know what broke the comments here and in CFLAA, but *shrug*.
llvm-svn: 333332
Fuchsia's _zx_port_wait no longer takes the count argument. This
change also updates all symbol uses to use the underscored versions.
Differential Revision: https://reviews.llvm.org/D47403
llvm-svn: 333328
r333325 from D47225 added warning checks, and the test was written to be C++11 correct by using ATOMIC_VAR_INIT (note that the committee fixed that recently...). It seems like GCC can't handle ATOMIC_VAR_INIT well because it generates 'type 'std::atomic<int>' cannot be initialized with an initializer list' on bot libcxx-libcxxabi-x86_64-linux-ubuntu-cxx03. Drop the ATOMIC_VAR_INITs since they weren't required to test the diagnostics.
llvm-svn: 333327
These functions are obsolete. The analyzer would advice to replace them with
memcmp(), memcpy() or memmove(), or memset().
Patch by Tom Rix!
Differential Revision: https://reviews.llvm.org/D41881
llvm-svn: 333326
Summary:
The atomic non-member functions accept pointers to std::atomic / std::atomic_flag as well as to the non-atomic value. These are all dereferenced unconditionally when lowered, and therefore will fault if null. It's a tiny gotcha for new users, especially when they pass in NULL as expected value (instead of passing a pointer to a NULL value). We can therefore use the nonnull attribute to denote that:
- A warning should be generated if the argument is null
- It is undefined behavior if the argument is null (because a dereference will segfault)
This patch adds support for this attribute for clang and GCC, and sticks to the subset of the syntax both supports. In particular, work around this GCC oddity:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60625
The attributes are documented:
- https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Function-Attributes.html
- https://clang.llvm.org/docs/AttributeReference.html#nullability-attributes
I'm authoring a companion clang patch for the __c11_* and __atomic_* builtins, which currently only warn on a subset of the pointer parameters.
In all cases the check needs to be explicit and not use the empty nonnull list, because some of the overloads are for atomic<T*> and the values themselves are allowed to be null.
<rdar://problem/18473124>
Reviewers: arphaman, EricWF
Subscribers: aheejin, christof, cfe-commits
Differential Revision: https://reviews.llvm.org/D47225
llvm-svn: 333325
Reverting this to see if this is causing the failures of the
clang-with-thin-lto-ubuntu bot.
[IPSCCP] Use PredicateInfo to propagate facts from cmp instructions.
This patch updates IPSCCP to use PredicateInfo to propagate
facts to true branches predicated by EQ and to false branches
predicated by NE.
As a follow up, we should be able to extend it to also propagate additional
facts about nonnull.
Reviewers: davide, mssimpso, dberlin, efriedma
Reviewed By: davide, dberlin
Differential Revision: https://reviews.llvm.org/D45330
llvm-svn: 333323
Craig Topper