The plan is to eventually make this logic simpler, however I expect it to
be a little tricky for the foreseeable future (at least until we're rid of
pointee types), so move it here so that it can be reused to build a summary
index for devirtualization.
Differential Revision: http://reviews.llvm.org/D20005
llvm-svn: 269081
An example from Hexagon where things went wrong:
%R0<def> = L2_loadrigp <ga:@fp04> ; load function address
J2_callr %R0<kill>, ..., %R0<imp-def> ; call *R0, return value in R0
ScheduleDAGInstrs::buildSchedGraph would visit all instructions going
backwards, and in each instruction it would visit all operands in their
order on the operand list. In the case of this call, it visited the use
of R0 first, then removed it from the set Uses after it visited the def.
This caused the DAG to be missing the data dependence edge on R0 between
the load and the call.
Differential Revision: http://reviews.llvm.org/D20102
llvm-svn: 269076
Currently, SelectionDAG assumes 8/16-bit cmpxchg returns either a sign
extended result, or a zero extended result. SystemZ takes a third
option by returning junk in the high bits (rotated contents of the other
bytes in the memory word). In that case, don't use Assert*ext, and
zero-extend the result ourselves if a comparison is needed.
Differential Revision: http://reviews.llvm.org/D19800
llvm-svn: 269075
If a profitable run is performed we will check if the SCoP seems to be
profitable after creation but before e.g., dependence are computed. This is
needed as SCoP detection only approximates the actual SCoP representation.
In the end this should allow us to be less conservative during the SCoP
detection while keeping the compile time in check.
llvm-svn: 269074
Summary:
Currently libc++experimental builds with C++11. This patch changes that to C++14 when supported by the compiler. Although nothing currently requires C++14 the upcoming <experimental/memory_resource> implementation would benefit from it. [1]
Note that libc++.so continues to build with C++11 and is unaffected by this change.
[1] <experimental/memory_resource> provides global resources which must exist for the entire lifetime of the program. In order to ensure that a global resource can be used during program termination there destructors must never be invoked. The only way to do this, while also allowing "constant initialization", is to use a C++14 union.
Reviewers: mclow.lists
Subscribers: pete, cfe-commits
Differential Revision: http://reviews.llvm.org/D19992
llvm-svn: 269070
Summary:
Add support for emission of plaintext lists of the imported files for
each distributed backend compilation. Used for distributed build file
staging.
Invoked with new gold-plugin thinlto-emit-imports-files option, which is
only valid with thinlto-index-only (i.e. for distributed builds), or
from llvm-lto with new -thinlto-action=emitimports value.
Depends on D19556.
Reviewers: joker.eph
Subscribers: llvm-commits, joker.eph
Differential Revision: http://reviews.llvm.org/D19636
llvm-svn: 269067
This is the option which sorts relocs to optimize dynamic linker performance.
-z combelocs is the default in gold, also it ignores -z nocombreloc,
this patch do the same.
Patch sorts relocations by symbols only and do not create any
DT_REL[A]COUNT entries. That is different with what gold/bfd do.
More information about option is here:
http://www.airs.com/blog/archives/186http://people.redhat.com/jakub/prelink.pdf, p.2
Differential revision: http://reviews.llvm.org/D19528
llvm-svn: 269066
Summary:
Lift some common code used by multiple checkers.
This function is also used by checkers that are coming.
It is quite common for a checker to parse a list of names.
Reviewers: alexfh
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D19846
llvm-svn: 269065
Regions with one affine loop can be profitable if the loop is
distributable. To this end we will allow them to be treated as
profitable if they contain at least two non-trivial basic blocks.
llvm-svn: 269064
Seems like my sphynx version is different than the one in the bot, as it
accepted everything locally. I think this is the right fix...
llvm-svn: 269062
The assumption attached to an llvm.assume in the SCoP needs to be
combined with the domain of the surrounding statement but can
nevertheless be used to refine the context.
This fixes the problems mentioned in PR27067.
llvm-svn: 269060
This restores commit r268627:
Summary:
When launching ThinLTO backends in a distributed build (currently
supported in gold via the thinlto-index-only plugin option), emit
an individual index file for each backend process as described here:
http://lists.llvm.org/pipermail/llvm-dev/2016-April/098272.html
...
Differential Revision: http://reviews.llvm.org/D19556
Address msan failures by avoiding std::prev on map.end(), the
theory is that this is causing issues due to some known UB problems
in __tree.
llvm-svn: 269059
Clear() log message was claiming it was the destructor, which had me very confused when looking
at the log messages. Fix the message, and add a log message to the real destructor.
Also noticed that the destructor was needlessly locking the broadcaster mutex (as Clear was
locking it again anyway), so remove that as well.
llvm-svn: 269058
This patches makes the propagation of complexity problems during
domain generation consistent. Additionally, it makes it less likely to
encounter ill-formed domains later, e.g., during schedule generation.
llvm-svn: 269055
HowToCrossCompile was outdated and generating too much traffic on the mailing
list with similar queries. This change helps offset most of the problems that
were reported recently including:
* Removing the -ccc-gcc-name, adding --sysroot
* Making references to Debian's multiarch for target libraries
* Expanding -DCMAKE_CXX_FLAGS for both GCC and Clang
* Some formatting and clarifications in the text
llvm-svn: 269054
Before this patch we generated error-restrictions only for
error-blocks, thus blocks (or regions) containing a not represented
function call. However, the same reasoning is needed if the invalid
domain of a statement subsumes its actual domain. To this end we move
the generation of error-restrictions after the propagation of the
invalid domains. Consequently, error-statements are now defined more
general as statements that are assumed to be not executed.
Additionally, we do not record an empty domain for such statements but
a nullptr instead. This allows to distinguish between error-statements
and dead-statements.
llvm-svn: 269053
This removes a redundant stride versioning step (we already
do it in getPtrStride, so it has no effect) and uses PSE to
get the SCEV expressions for the source and destination
(this might have changed when getPtrStride was called).
I discovered this through code inspection, and couldn't
produce a regression test for it.
llvm-svn: 269052
directives.
OpenMP 4.5 supports clause 'priority' in task-based directives. Patch
adds initial codegen support for this clause in codegen.
llvm-svn: 269050
We now use context information to simplify the domains and access
functions of the SCoP instead of just aligning them with the parameter
space.
llvm-svn: 269048
Following post-commit comments on r268900 from Rafael Espindola:
The missing relocations are now explicitly listed in the switch statement with
appropriate FIXME comments and the default path is now unreachable. The
temporary exception to this is that compound relocations for N64 still have a
default path that returns true. This is because fixing that case ought to be a
separate patch.
Also make R_MIPS_NONE return false since it has no effect on the section data.
llvm-svn: 269047
Previously we checked the number of pieces to decide whether or not a
invariant load was to complex to be generated. However, there are
cases when e.g., divisions cause the complexity to spike regardless of
the number of pieces. To this end we now check the number of totally
involved dimensions which will increase with the number of pieces but
also the number of divisions.
llvm-svn: 269045
This exposes the functionality to interpret a SCEV, or better the
piece-wise function created from the SCEV, as an unsigned value
instead of a signed one.
llvm-svn: 269044
Another stack where we try to free sync objects,
but don't have a processors is:
// ResetRange
// __interceptor_munmap
// __deallocate_stack
// start_thread
// clone
Again, it is a latent bug that lead to memory leaks.
Also, increase amount of memory we scan in MetaMap::ResetRange.
Without that the test does not fail, as we fail to free
the sync objects on stack.
llvm-svn: 269041
If private variables require destructors call at the deletion of the
task, additional flag in task flags must be set. Patch fixes this
problem.
llvm-svn: 269039
schedule modifiers.
Runtime library expects some additional data in schedule argument for
loop-based directives, that have additional schedule modifiers
'monotonic|nonmonotonic'.
llvm-svn: 269035
Loop rotation clones instruction from the old header into the preheader. If
there were uses of values produced by these instructions that were outside
the loop, we have to insert PHI nodes to merge the two values. If the values
are used by DbgIntrinsics they will be used as a MetadataAsValue of a
ValueAsMetadata of the original values, and iterating all of the uses of the
original value will not update the DbgIntrinsics. The new code checks if the
values are used by DbgIntrinsics and if so, updates them using essentially
the same logic as the original code.
The attached testcase demonstrates the issue. Without the fix, the
DbgIntrinic outside the loop uses values computed inside the loop, even
though these values do not dominate the DbgIntrinsic.
Author: Thomas Jablin (tjablin)
Reviewers: dblaikie aprantl kbarton hfinkel cycheng
http://reviews.llvm.org/D19564
llvm-svn: 269034
When a va_start or va_copy is immediately followed by a va_end (ignoring
debug information or other start/end in between), then it is safe to
remove the pair. As this code shares some commonalities with the lifetime
markers, this has been factored to helper functions.
This InstCombine pattern kicks-in 3 times when running the LLVM test
suite.
llvm-svn: 269033
Added test to check LeonItineraries are being applied by code checked-in two weeks ago in r267121.
Phabricator Review: http://reviews.llvm.org/D19359
llvm-svn: 269032
Peter Collingbourne