SB (Speculative Barrier) is only mandatory from 8.5
onwards but is optional from Armv8.0-A. This patch adds a command
line option to enable SB, as it was previously only possible to
enable by selecting -march=armv8.5-a.
This patch also moves to FeatureSB the old FeatureSpecRestrict.
Reviewers: pbarrio, olista01, t.p.northover, LukeCheeseman
Differential Revision: https://reviews.llvm.org/D55921
llvm-svn: 350126
Summary:
Added a pair of APIs for encoding/decoding the 3 components of a DWARF discriminator described in http://lists.llvm.org/pipermail/llvm-dev/2016-October/106532.html: the base discriminator, the duplication factor (useful in profile-guided optimization) and the copy index (used to identify copies of code in cases like loop unrolling)
The encoding packs 3 unsigned values in 32 bits. This CL addresses 2 issues:
- communicates overflow back to the user
- supports encoding all 3 components together. Current APIs assume a sequencing of events. For example, creating a new discriminator based on an existing one by changing the base discriminator was not supported.
Reviewers: davidxl, danielcdh, wmi, dblaikie
Reviewed By: dblaikie
Subscribers: zzheng, dmgreen, aprantl, JDevlieghere, llvm-commits
Differential Revision: https://reviews.llvm.org/D55681
llvm-svn: 349973
Weak symbols are supposed to be supported in the ELF TextAPI
implementation, but the YAML handler didn't read or write the `Weak`
member of ELFSymbol. This change adds the YAML mapping and updates tests
to ensure correct behavior.
Differential Revision: https://reviews.llvm.org/D56020
llvm-svn: 349950
Summary:
This function checks whether the mappings in the interval map overlap
with the given range [a;b]. The motivation is to enable checking for
overlap before inserting a new interval into the map.
Reviewers: vsk, dblaikie
Subscribers: dexonsmith, kristina, llvm-commits
Differential Revision: https://reviews.llvm.org/D55760
llvm-svn: 349898
Summary:
This function is very similar to add_llvm_library(), so this patch merges it
into add_llvm_library() and replaces all calls to add_llvm_loadable_module(lib ...)
with add_llvm_library(lib MODULE ...)
Reviewers: philip.pfaffe, beanz, chandlerc
Reviewed By: philip.pfaffe
Subscribers: chapuni, mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D51748
llvm-svn: 349839
We need to keep the underlying profile reader alive as long as the
profile data, because the profile data may contain StringRefs referring
to strings in the reader's name table.
llvm-svn: 349600
Summary:
This allows us to register it with the MachineFunction delegate and be
notified automatically about erasure and creation of instructions. However,
we still need explicit notification for modifications such as those caused
by setReg() or replaceRegWith().
There is a catch with this though. The notification for creation is
delivered before any operands can be added. While appropriate for
scheduling combiner work. This is unfortunate for debug output since an
opcode by itself doesn't provide sufficient information on what happened.
As a result, the work list remembers the instructions (when debug output is
requested) and emits a more complete dump later.
Another nit is that the MachineFunction::Delegate provides const pointers
which is inconvenient since we want to use it to schedule future
modification. To resolve this GISelWorkList now has an optional pointer to
the MachineFunction which describes the scope of the work it is permitted
to schedule. If a given MachineInstr* is in this function then it is
permitted to schedule work to be performed on the MachineInstr's. An
alternative to this would be to remove the const from the
MachineFunction::Delegate interface, however delegates are not permitted
to modify the MachineInstr's they receive.
In addition to this, the observer has three interface changes.
* erasedInstr() is now erasingInstr() to indicate it is about to be erased
but still exists at the moment.
* changingInstr() and changedInstr() have been added to report changes
before and after they are made. This allows us to trace the changes
in the debug output.
* As a convenience changingAllUsesOfReg() and
finishedChangingAllUsesOfReg() will report changingInstr() and
changedInstr() for each use of a given register. This is primarily useful
for changes caused by MachineRegisterInfo::replaceRegWith()
With this in place, both combine rules have been updated to report their
changes to the observer.
Finally, make some cosmetic changes to the debug output and make Combiner
and CombinerHelp
Reviewers: aditya_nandakumar, bogner, volkan, rtereshin, javed.absar
Reviewed By: aditya_nandakumar
Subscribers: mgorny, rovka, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D52947
llvm-svn: 349167
Summary:
In addition to knowing that an instruction is changed. It's also useful to
know when it's about to change. For example, it might print the instruction so
you can track the changes in a debug log, it might remove it from some queue
while it's being worked on, or it might want to change several instructions as
a single transaction and act on all the changes at once.
Added changingInstr() to all existing uses of changedInstr()
Reviewers: aditya_nandakumar
Reviewed By: aditya_nandakumar
Subscribers: rovka, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D55623
llvm-svn: 348992
Summary:
There's little of interest that can be done to an already-erased instruction.
You can't inspect it, write it to a debug log, etc. It ought to be notification
that we're about to erase it. Rename the function to clarify the timing of the
event and reflect current usage.
Also fixed one case where we were trying to print an erased instruction.
Reviewers: aditya_nandakumar
Reviewed By: aditya_nandakumar
Subscribers: rovka, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D55611
llvm-svn: 348976
IR-printing AfterPass instrumentation might be called on a loop
that has just been invalidated. We should skip printing it to
avoid spurious asserts.
Reviewed By: chandlerc, philip.pfaffe
Differential Revision: https://reviews.llvm.org/D54740
llvm-svn: 348887
This change makes DT_SONAME treated as an optional trait for ELF TextAPI
stubs. This change accounts for the fact that shared objects aren't
guaranteed to have a DT_SONAME entry. Tests have been updated to check
for correct behavior of an optional soname.
Differential Revision: https://reviews.llvm.org/D55533
llvm-svn: 348817
https://reviews.llvm.org/D55294
Previously MachineIRBuilder::buildInstr used to accept variadic
arguments for sources (which were either unsigned or
MachineInstrBuilder). While this worked well in common cases, it doesn't
allow us to build instructions that have multiple destinations.
Additionally passing in other optional parameters in the end (such as
flags) is not possible trivially. Also a trivial call such as
B.buildInstr(Opc, Reg1, Reg2, Reg3)
can be interpreted differently based on the opcode (2defs + 1 src for
unmerge vs 1 def + 2srcs).
This patch refactors the buildInstr to
buildInstr(Opc, ArrayRef<DstOps>, ArrayRef<SrcOps>)
where DstOps and SrcOps are typed unions that know how to add itself to
MachineInstrBuilder.
After this patch, most invocations would look like
B.buildInstr(Opc, {s32, DstReg}, {SrcRegs..., SrcMIBs..});
Now all the other calls (such as buildAdd, buildSub etc) forward to
buildInstr. It also makes it possible to build instructions with
multiple defs.
Additionally in a subsequent patch, we should make it possible to add
flags directly while building instructions.
Additionally, the main buildInstr method is now virtual and other
builders now only have to override buildInstr (for say constant
folding/cseing) is straightforward.
Also attached here (https://reviews.llvm.org/F7675680) is a clang-tidy
patch that should upgrade the API calls if necessary.
llvm-svn: 348815
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
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
The list generated in the target parser tests is the
same as the one in the AArch64 target parser.
Use that one instead.
Differential Revision: https://reviews.llvm.org/D55509
llvm-svn: 348757
Since TBEHandler doesn't maintain state or otherwise have any need to be
a class right now, the read and write functions have been moved out and
turned into standalone functions. Additionally, the TBE read function
has been updated to return an Expected value for better error handling.
Tests have been updated to reflect these changes.
Differential Revision: https://reviews.llvm.org/D55450
llvm-svn: 348735
When CodeExtractor outlines values which are used by the original
function, it must store those values in some in-out parameter. This
store instruction must not be inserted in between a PHI and an EH pad
instruction, as that results in invalid IR.
This fixes the following verifier failure seen while outlining within
ObjC methods with live exit values:
The unwind destination does not have an exception handling instruction!
%call35 = invoke i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend to i8* (i8*, i8*)*)(i8* %exn.adjusted, i8* %1)
to label %invoke.cont34 unwind label %lpad33, !dbg !4183
The unwind destination does not have an exception handling instruction!
invoke void @objc_exception_throw(i8* %call35) #12
to label %invoke.cont36 unwind label %lpad33, !dbg !4184
LandingPadInst not the first non-PHI instruction in the block.
%3 = landingpad { i8*, i32 }
catch i8* null, !dbg !1411
rdar://46540815
llvm-svn: 348562
https://reviews.llvm.org/D54980
This provides a standard API across GISel passes to observe and notify
passes about changes (insertions/deletions/mutations) to MachineInstrs.
This patch also removes the recordInsertion method in MachineIRBuilder
and instead provides method to setObserver.
Reviewed by: vkeles.
llvm-svn: 348406
Like the already existing zip_shortest/zip_first iterators, zip_longest
iterates over multiple iterators at once, but has as many iterations as
the longest sequence.
This means some iterators may reach the end before others do.
zip_longest uses llvm::Optional's None value to mark a
past-the-end value.
zip_longest is not reverse-iteratable because the tuples iterated over
would be different for different length sequences (IMHO for the same
reason neither zip_shortest nor zip_first should be reverse-iteratable;
one can still reverse the ranges individually if that's the expected
behavior).
In contrast to zip_shortest/zip_first, zip_longest tuples contain
rvalues instead of references. This is because llvm::Optional cannot
contain reference types and the value-initialized default does not have
a memory location a reference could point to.
The motivation for these iterators is to use C++ foreach to compare two
lists of ordered attributes in D48100 (SemaOverload.cpp and
ASTReaderDecl.cpp).
Idea by @hfinkel.
This re-commits r348301 which was reverted by r348303.
The compilation error by gcc 5.4 was resolved using make_tuple in the in
the initializer_list.
The compileration error by msvc14 was resolved by splitting
ZipLongestValueType (which already was a workaround for msvc15) into
ZipLongestItemType and ZipLongestTupleType.
Differential Revision: https://reviews.llvm.org/D48348
llvm-svn: 348323
Like the already existing zip_shortest/zip_first iterators, zip_longest
iterates over multiple iterators at once, but has as many iterations as
the longest sequence.
This means some iterators may reach the end before others do.
zip_longest uses llvm::Optional's None value to mark a
past-the-end value.
zip_longest is not reverse-iteratable because the tuples iterated over
would be different for different length sequences (IMHO for the same
reason neither zip_shortest nor zip_first should be reverse-iteratable;
one can still reverse the ranges individually if that's the expected
behavior).
In contrast to zip_shortest/zip_first, zip_longest tuples contain
rvalues instead of references. This is because llvm::Optional cannot
contain reference types and the value-initialized default does not have
a memory location a reference could point to.
The motivation for these iterators is to use C++ foreach to compare two
lists of ordered attributes in D48100 (SemaOverload.cpp and
ASTReaderDecl.cpp).
Idea by @hfinkel.
Differential Revision: https://reviews.llvm.org/D48348
llvm-svn: 348301
If a PHI node out of extracted region has multiple incoming values from it,
split this PHI on two parts. First PHI has incomings only from region and
extracts with it (they are placed to the separate basic block that added to the
list of outlined), and incoming values in original PHI are replaced by first
PHI. Similar solution is already used in CodeExtractor for PHIs in entry block
(severSplitPHINodes method). It covers PR39433 bug.
Patch by Sergei Kachkov!
Differential Revision: https://reviews.llvm.org/D55018
llvm-svn: 348205
http://lists.llvm.org/pipermail/llvm-dev/2018-September/126472.html
TextAPI is a library and accompanying tool that allows conversion between binary shared object stubs and textual counterparts. The motivations and uses cases for this are explained thoroughly in the llvm-dev proposal [1]. This initial commit proposes a potential structure for the TAPI library, also including support for reading/writing text-based ELF stubs (.tbe) in addition to preliminary support for reading binary ELF files. The goal for this patch is to ensure the project architecture appropriately welcomes integration of Mach-O stubbing from Apple's TAPI [2].
Added:
- TextAPI library
- .tbe read support
- .tbe write (to raw_ostream) support
[1] http://lists.llvm.org/pipermail/llvm-dev/2018-September/126472.html
[2] https://github.com/ributzka/tapi
Differential Revision: https://reviews.llvm.org/D53051
llvm-svn: 348170
Summary:
SSBS (Speculative Store Bypass Safe) is only mandatory from 8.5
onwards but is optional from Armv8.0-A. This patch adds a command
line option to enable SSBS, as it was previously only possible to
enable by selecting -march=armv8.5-a.
Similar patch upstream in GNU binutils:
https://sourceware.org/ml/binutils/2018-09/msg00274.html
Reviewers: olista01, samparker, aemerson
Reviewed By: samparker
Subscribers: javed.absar, kristof.beyls, kristina, llvm-commits
Differential Revision: https://reviews.llvm.org/D54629
llvm-svn: 348137
If the shift amount is known, we can determine the known bits of the
output based on the known bits of two inputs.
This is essentially the same functionality as implemented in D54869,
but for ValueTracking rather than InstCombine SimplifyDemandedBits.
Differential Revision: https://reviews.llvm.org/D55140
llvm-svn: 348091
Generalize the existing MatchSelectPatternTest class to also work
with other types of tests. This reduces the amount of boilerplate
necessary to write ValueTracking tests in general, and computeKnownBits
tests in particular.
The inherited convention is that the function must be @test and the
tested instruction %A.
Differential Revision: https://reviews.llvm.org/D55141
llvm-svn: 348043
Moving to PlatformType from BinaryFormat had some UB fallout when handing
unknown platforms or malformed input files.
This should fix the sanitizer bots.
llvm-svn: 347836
Add the required target triples to LLVMSupport to support Hurd
in LLVM (formally `pc-hurd-gnu`).
Patch by sthibaul (Samuel Thibault)
Differential Revision: https://reviews.llvm.org/D54378
llvm-svn: 347832
Add basic infrastructure for reading and writting TBD files (version 1 - 3).
The TextAPI library is not used by anything yet (besides the unit tests). Tool
support will be added in a separate commit.
The TBD format is currently documented in the implementation file (TextStub.cpp).
https://reviews.llvm.org/D53945
Update: This contains changes to fix issues discovered by the bots:
- add parentheses to silence warnings.
- rename variables
- use PlatformType from BinaryFormat
llvm-svn: 347823
Add basic infrastructure for reading and writting TBD files (version 1 - 3).
The TextAPI library is not used by anything yet (besides the unit tests). Tool
support will be added in a separate commit.
The TBD format is currently documented in the implementation file (TextStub.cpp).
https://reviews.llvm.org/D53945
llvm-svn: 347808
extract_symbols.py (introduced in D18826) expects all of its library arguments
to be in the same directory - typically <config>/lib. DynamicLibraryLib.lib is
instead to be found in lib/<config>.
This patch intended to make DynamicLibraryLib.lib be created in <config>/lib
alongside most of the other libraries.
I previously tried passing absolute paths to extract_symbols.py but this
generated command lines that were too long for Visual Studio 2015: D54587
Differential Revision: https://reviews.llvm.org/D54701
llvm-svn: 347764
separate files to enable future changes.
This moves ARM and AArch64 target parsing into their
own files. They are still accessible through
TargetParser.h as before.
Several functions in AArch64 which were just forwarders to ARM
have been removed. All except AArch64::getFPUName were unused,
and that was only used in a test. Which itself was overlapping
one in ARM, so it has also been removed.
Differential revision: https://reviews.llvm.org/D53980
llvm-svn: 347741
Summary:
This (very specialized) function was added to enable an LLDB use case.
Now that a more generic interface (overriding of parser functions -
D52992) is available, and LLDB has been converted to use that (D54074),
the function is unused and can be removed.
Reviewers: erik.pilkington, sgraenitz, rsmith
Subscribers: mgorny, hiraditya, christof, libcxx-commits, llvm-commits
Differential Revision: https://reviews.llvm.org/D54893
llvm-svn: 347670
We can now select CLZ via the TableGen'erated code, so support G_CTLZ
and G_CTLZ_ZERO_UNDEF throughout the pipeline for types <= s32.
Legalizer:
If the CLZ instruction is available, use it for both G_CTLZ and
G_CTLZ_ZERO_UNDEF. Otherwise, use a libcall for G_CTLZ_ZERO_UNDEF and
lower G_CTLZ in terms of it.
In order to achieve this we need to add support to the LegalizerHelper
for the legalization of G_CTLZ_ZERO_UNDEF for s32 as a libcall (__clzsi2).
We also need to allow lowering of G_CTLZ in terms of G_CTLZ_ZERO_UNDEF
if that is supported as a libcall, as opposed to just if it is Legal or
Custom. Due to a minor refactoring of the helper function in charge of
this, we will also allow the same behaviour for G_CTTZ and G_CTPOP.
This is not going to be a problem in practice since we don't yet have
support for treating G_CTTZ and G_CTPOP as libcalls (not even in
DAGISel).
Reg bank select:
Map G_CTLZ to GPR. G_CTLZ_ZERO_UNDEF should not make it to this point.
Instruction select:
Nothing to do.
llvm-svn: 347545
The `expandTildeExpr` routine just replaces a tilde by a home dir path.
If the home dir has a trailing slash, the result of substitution will
contain double slashes. For example, `HOME=/foo/ ~/bar` gives `/foo//bar`.
That corresponds to (at least) Bash behaviour because the following
command `$HOME=/foo/ echo ~/bar` prints `/foo//bar`.
The `ExpandTilde` test constructs a path expected as the `fs::expand_tilde`
call result by calling `path::append` and the expected path has a single
slash. This patch fixes that and allows to pass the unittest on hosts where
the `HOME` is `/`.
Differential Revision: http://reviews.llvm.org/D54752
llvm-svn: 347346
Skip all MappedMemoryTest variants that rely on memory pages being
mapped for MF_WRITE|MF_EXEC when MPROTECT is enabled on NetBSD. W^X
protection causes all those mmap() calls to fail, causing the tests
to fail.
Differential Revision: https://reviews.llvm.org/D54080
llvm-svn: 347337
This adds the sadd_sat, uadd_sat, ssub_sat, usub_sat methods for performing saturating additions and subtractions to APInt.
Split out from D54237.
Patch by: nikic (Nikita Popov)
Differential Revision: https://reviews.llvm.org/D54332
llvm-svn: 347324
This patch fixes the issue noticed in D54532.
The problem is that cst_pred_ty-based matchers like m_Zero() currently do not match
scalar undefs (as expected), but *do* match vector undefs. This may lead to optimization
inconsistencies in rare cases.
There is only one existing test for which output changes, reverting the change from D53205.
The reason here is that vector fsub undef, %x is no longer matched as an m_FNeg(). While I
think that the new output is technically worse than the previous one, it is consistent with
scalar, and I don't think it's really important either way (generally that undef should have
been folded away prior to reassociation.)
I've also added another test case for this issue based on InstructionSimplify. It took some
effort to find that one, as in most cases undef folds are either checked first -- and in the
cases where they aren't it usually happens to not make a difference in the end. This is the
only case I was able to come up with. Prior to this patch the test case simplified to undef
in the scalar case, but zeroinitializer in the vector case.
Patch by: @nikic (Nikita Popov)
Differential Revision: https://reviews.llvm.org/D54631
llvm-svn: 347318
Apply review comments of https://reviews.llvm.org/D54185 to other target as well, specifically:
1. make anonymous namespaces as small as possible, avoid using static inside anonymous namespaces
2. Add missing header to some files
3. GetLoadImmediateOpcodem-> getLoadImmediateOpcode
4. Fix typo
Differential Revision: https://reviews.llvm.org/D54343
llvm-svn: 347309
Diogo N. Sampaio