Promoting it from InstCombine's tryToReuseConstantFromSelectInComparison().
Return true if this constant and a constant 'Y' are element-wise equal.
This is identical to just comparing the pointers, with the exception that
for vectors, if only one of the constants has an `undef` element in some
lane, the constants still match.
llvm-svn: 369842
Summary: Removes a not so useful function from DataLayout and cleans up Support/MathExtras.h
Reviewers: courbet
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66691
llvm-svn: 369824
I noticed another instance of the issue where references to aliases were
being replaced with aliasees, this time in InstCombine. In the instance that
I saw it turned out to be only a QoI issue (a symbol ended up being missing
from the symbol table due to the last reference to the alias being removed,
preventing HWASAN from symbolizing a global reference), but it could easily
have manifested as incorrect behaviour.
Since this is the third such issue encountered (previously: D65118, D65314)
it seems to be time to address this common error/QoI issue once and for all
and make the strip* family of functions not look through aliases.
Includes a test for the specific issue that I saw, but no doubt there are
other similar bugs fixed here.
As with D65118 this has been tested to make sure that the optimization isn't
load bearing. I built Clang, Chromium for Linux, Android and Windows as well
as the test-suite and there were no size regressions.
Differential Revision: https://reviews.llvm.org/D66606
llvm-svn: 369697
Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.
llvm-svn: 369013
Summary: This exposes `CallInst`'s tail call kind via new `LLVMGetTailCallKind` and `LLVMSetTailCallKind` functions. The motivation for this is to be able to see `musttail` for languages that require mandatory tail calls for correctness. Today only the weaker `LLVMSetTail` is exposed and there is no way to set `GuaranteedTailCallOpt` via the C API.
Reviewers: CodaFi, jyknight, deadalnix, rnk
Reviewed By: CodaFi
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66061
llvm-svn: 368945
Summary:
This is a tweak to r368311 and r368646 which auto upgrades the calls to
objc runtime functions to objc runtime intrinsics, in order to make sure
that the auto upgrader does not trigger with up-to-date bitcode.
It is possible for bitcode that is up-to-date to contain direct calls to
objc runtime function and those are not inserted by compiler as part of
ARC and they should not be upgraded. Now auto upgrader only triggers as
when the old style of ARC marker is used so it is guaranteed that it
won't trigger on update-to-date bitcode.
This also means it won't do this upgrade for bitcode from llvm-8 and
llvm-9, which preserves the behavior of those releases. Ideally they
should be upgraded as well but it is more important to make sure
AutoUpgrader will not trigger on up-to-date bitcode.
Reviewers: ahatanak, rjmccall, dexonsmith, pete
Reviewed By: dexonsmith
Subscribers: hiraditya, jkorous, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D66153
llvm-svn: 368730
to intrinsic calls
This fixes a bug in r368311.
It turns out that the ARC runtime functions in the IR can have pointer
parameter types that are not i8* or i8**. Instead of RAUWing normal
functions with intrinsics, manually bitcast the arguments before passing
them to the intrinsic functions and bitcast the return value back to the
type of the original call instruction.
This recommits r368634, which was reverted in r368637. The loop in the
patch was iterating over uses of a function and deleting function calls
inside it, which caused bots to crash.
rdar://problem/54125406
Differential Revision: https://reviews.llvm.org/D66047
llvm-svn: 368646
to intrinsic calls
This fixes a bug in r368311.
It turns out that the ARC runtime functions in the IR can have pointer
parameter types that are not i8* or i8**. Instead of RAUWing normal
functions with intrinsics, manually bitcast the arguments before passing
them to the intrinsic functions and bitcast the return value back to the
type of the original call instruction.
rdar://problem/54125406
llvm-svn: 368634
the bitcode has the arm64 retainAutoreleasedReturnValue marker
The ARC middle-end passes stopped optimizing or transforming bitcode
that has been compiled with old compilers after we started emitting
calls to ARC runtime functions as intrinsic calls instead of normal
function calls in the front-end and made changes to teach the ARC
middle-end passes about those intrinsics (see r349534). This patch
converts calls to ARC runtime functions that are not intrinsic functions
to intrinsic function calls if the bitcode has the arm64
retainAutoreleasedReturnValue marker. Checking for the presence of the
marker is necessary to make sure we aren't changing ARC function calls
that were originally MRR message sends (see r349952).
rdar://problem/53280660
Differential Revision: https://reviews.llvm.org/D65902
llvm-svn: 368311
This patch turns on the prof branch_weights metadata consistency
check in SwitchInstProfUpdateWrapper.
If this patch causes a failure then please before reverting do report
the IR that hits the assertion and try identifying the pass that
introduces the inconsistency. We have to fix all such passes.
See also the upcoming change https://reviews.llvm.org/D61179
in the Verifier.
Reviewers: davidx, nikic, eraman, reames, chandlerc
Reviewed By: davidx
Differential Revision: https://reviews.llvm.org/D64061
llvm-svn: 368129
This check is only meaningful for COFF and it is perfectly valid to create
such a GlobalValue in ELF.
Differential Revision: https://reviews.llvm.org/D65686
llvm-svn: 368094
For consistency with normal instructions and clarity when reading IR,
it's best to print the %0, %1, ... names of function arguments in
definitions.
Also modifies the parser to accept IR in that form for obvious reasons.
llvm-svn: 367755
Summary:
While there is always a `Value::replaceAllUsesWith()`,
sometimes the replacement needs to be conditional.
I have only cleaned a few cases where `replaceUsesWithIf()`
could be used, to both add test coverage,
and show that it is actually useful.
Reviewers: jdoerfert, spatel, RKSimon, craig.topper
Reviewed By: jdoerfert
Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, aheejin, george.burgess.iv, asbirlea, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D65528
llvm-svn: 367548
Add a new serializer, using a binary format based on the LLVM bitstream
format.
This format provides a way to serialize the remarks in two modes:
1) Separate mode: the metadata is separate from the remark entries.
2) Standalone mode: the metadata and the remark entries are in the same
file.
The format contains:
* a meta block: container version, container type, string table,
external file path, remark version
* a remark block: type, remark name, pass name, function name, debug
file, debug line, debug column, hotness, arguments (key, value, debug
file, debug line, debug column)
A string table is required for this format, which will be dumped in the
meta block to be consumed before parsing the remark blocks.
On clang itself, we noticed a size reduction of 13.4x compared to YAML,
and a compile-time reduction of between 1.7% and 3.5% on CTMark.
Differential Revision: https://reviews.llvm.org/D63466
Original llvm-svn: 367364
Revert llvm-svn: 367370
llvm-svn: 367372
Add a new serializer, using a binary format based on the LLVM bitstream
format.
This format provides a way to serialize the remarks in two modes:
1) Separate mode: the metadata is separate from the remark entries.
2) Standalone mode: the metadata and the remark entries are in the same
file.
The format contains:
* a meta block: container version, container type, string table,
external file path, remark version
* a remark block: type, remark name, pass name, function name, debug
file, debug line, debug column, hotness, arguments (key, value, debug
file, debug line, debug column)
A string table is required for this format, which will be dumped in the
meta block to be consumed before parsing the remark blocks.
On clang itself, we noticed a size reduction of 13.4x compared to YAML,
and a compile-time reduction of between 1.7% and 3.5% on CTMark.
Differential Revision: https://reviews.llvm.org/D63466
llvm-svn: 367364
The default mode is separate, where the metadata is serialized
separately from the remarks.
Another mode is the standalone mode, where the metadata is serialized
before the remarks, on the same stream.
llvm-svn: 367328
Put the list of fixed metadata kinds in one place.
Testing: check-llvm with+without LLVM_ENABLE_MODULES=On
Differential Revision: https://reviews.llvm.org/D64437
llvm-svn: 367257
For aliases, any expression that lowers at the MC level to global_object or
global_object+constant is valid at the object file level. getBaseObject()
should return a result if the aliasee ends up being of that form even if
the IR used to produce it is somewhat unconventional.
Note that this is different from what stripInBoundsOffsets() and that family
of functions is doing. Those functions are concerned about semantic properties
of IR, whereas here we only care about the lowering result.
Therefore reimplement getBaseObject() in a way that matches the lowering
result. This fixes a crash when producing a summary for aliases such as
that in the included test case.
Differential Revision: https://reviews.llvm.org/D65115
llvm-svn: 366952
This exposes better support to use a string table with a format through
an actual new remark::Format, called yaml-strtab.
This can now be used with -fsave-optimization-record=yaml-strtab.
llvm-svn: 366849
Summary:
Allow IntToPtrInst to carry !dereferenceable metadata tag.
This is valid since !dereferenceable can be only be applied to
pointer type values.
Change-Id: If8a6e3c616f073d51eaff52ab74535c29ed497b4
Subscribers: llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D64954
llvm-svn: 366826
This causes sections with relative pointers to be marked as read only,
which means that they won't end up sharing pages with writable data.
Differential Revision: https://reviews.llvm.org/D64948
llvm-svn: 366494
Before, everything was based on some kind of type erased parser
implementation which container a lot of boilerplate code when multiple
formats were to be supported.
This simplifies it by:
* the remark now owns its arguments
* *always* returning an error from the implementation side
* working around the way the YAML parser reports errors: catch them through
callbacks and re-insert them in a proper llvm::Error
* add a CParser wrapper that is used when implementing the C API to
avoid cluttering the C++ API with useless state
* LLVMRemarkParserGetNext now returns an object that needs to be
released to avoid leaking resources
* add a new API to dispose of a remark entry: LLVMRemarkEntryDispose
llvm-svn: 366217
Add "memtag" sanitizer that detects and mitigates stack memory issues
using armv8.5 Memory Tagging Extension.
It is similar in principle to HWASan, which is a software implementation
of the same idea, but there are enough differencies to warrant a new
sanitizer type IMHO. It is also expected to have very different
performance properties.
The new sanitizer does not have a runtime library (it may grow one
later, along with a "debugging" mode). Similar to SafeStack and
StackProtector, the instrumentation pass (in a follow up change) will be
inserted in all cases, but will only affect functions marked with the
new sanitize_memtag attribute.
Reviewers: pcc, hctim, vitalybuka, ostannard
Subscribers: srhines, mehdi_amini, javed.absar, kristof.beyls, hiraditya, cryptoad, steven_wu, dexonsmith, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D64169
llvm-svn: 366123
Summary: We are going to add a function attribute number 64.
Reviewers: pcc, jdoerfert, lebedev.ri
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D64663
llvm-svn: 365980
