This is an alternative to D53080 since I think using a BEXTR for a shifted mask is definitely an improvement when the shl can be absorbed into addressing mode. The other cases I'm less sure about.
We already have several tricks for handling an and of a shift in address matching. This adds a new case for BEXTR.
I've moved the BEXTR matching code back to X86ISelDAGToDAG to allow it to match. I suppose alternatively we could directly emit a X86ISD::BEXTR node that isel could pattern match. But I'm trying to view BEXTR matching as an isel concern so DAG combine can see 'and' and 'shift' operations that are well understood. We did lose a couple cases from tbm_patterns.ll, but I think there are ways to recover that.
I've also put back the manual load folding code in matchBEXTRFromAnd that I removed a few months ago in r324939. This gives us some more freedom to make decisions based on the ability to fold a load. I haven't done anything with that yet.
Differential Revision: https://reviews.llvm.org/D53126
llvm-svn: 344270
While it doesn't make a *ton* of sense for POSIX paths to be
in PDBs, it's possible to occur in real scenarios involving
cross compilation.
The tools need to be able to handle this, because certain types
of debugging scenarios are possible without a running process
and so don't necessarily require you to be on a Windows system.
These include post-mortem debugging and binary forensics (e.g.
using a debugger to disassemble functions and examine symbols
without running the process).
There's changes in clang, LLD, and lldb in this patch. After
this the cross-platform disassembly and source-list tests pass
on Linux.
Furthermore, the behavior of LLD can now be summarized by a much
simpler rule than before: Unless you specify /pdbsourcepath and
/pdbaltpath, the PDB ends up with paths that are valid within
the context of the machine that the link is performed on.
Differential Revision: https://reviews.llvm.org/D53149
llvm-svn: 344269
error() in llvm-nm intentionally does not return so that the callee can move on to future files/slices. When printing the archive map, this is not currently handled (the caller assumes that error() returns), so processing continues despite there being an error.
Also, change one return to a break, so that symbols can be printed even if the archive map is corrupt.
llvm-svn: 344268
InstCombine keeps a worklist and assumes that optimizations don't
eraseFromParent() the instruction, which SimplifyLibCalls violates. This change
adds a new callback to SimplifyLibCalls to let clients specify their own hander
for erasing actions.
Differential Revision: https://reviews.llvm.org/D52729
llvm-svn: 344251
The ARM64 elf emitter would omit printing data
symbol for zero filled constant data. This patch
overrides the emitFill method as to enforce that
the symbol is correctly printed.
Differential revision: https://reviews.llvm.org/D53132
llvm-svn: 344248
This commit modifies an existing IR verifier check that
assumes all functions will be located in the default address
space 0.
Rather than using the default paramater value getPointerTo(AddrSpace=0),
explicitly specify the program memory address space from the data layout.
This only affects targets that specify a nonzero address space
in their data layouts. The only in-tree target that does this
is AVR.
llvm-svn: 344243
This is the umin alternative to the umax code from rL344237. We use
DeMorgans law on the umax case to bring us to the same thing on umin,
but using countLeadingOnes, not countLeadingZeros.
Differential Revision: https://reviews.llvm.org/D53036
llvm-svn: 344239
Use the demanded bits of umax(A,C) to prove we can just use A so long as the
lowest non-zero bit of DemandMask is higher than the highest non-zero bit of C
Differential Revision: https://reviews.llvm.org/D53033
llvm-svn: 344237
We assign indices sequentially for seen instructions, so we can just use
a vector and push back the seen instructions. No need for using a
DenseMap.
Reviewers: hsaito, rengolin, nadav, dcaballe
Reviewed By: rengolin
Differential Revision: https://reviews.llvm.org/D53089
llvm-svn: 344233
We can avoid doing some unnecessary work by skipping debug instructions
in a few loops. It also helps to ensure debug instructions do not
prevent vectorization, although I do not have any concrete test cases
for that.
Reviewers: rengolin, hsaito, dcaballe, aprantl, vsk
Reviewed By: rengolin, dcaballe
Differential Revision: https://reviews.llvm.org/D53091
llvm-svn: 344232
Summary:
Right now there is no hit counter on the line of function.
So the idea is add the line of the function to all the lines covered by the entry block.
Tests in compiler-rt/profile will be fixed in another patch: https://reviews.llvm.org/D49854
Reviewers: marco-c, davidxl
Reviewed By: marco-c
Subscribers: sylvestre.ledru, llvm-commits
Differential Revision: https://reviews.llvm.org/D49853
llvm-svn: 344228
Summary:
As discussed in D48491, we can't really do this in the TableGen,
since we need to produce *two* instructions. This only implements
one single pattern. The other 3 patterns will be in follow-ups.
I'm not sure yet if we want to also fuse shift into here
(i.e `(x >> start) & ...`)
Reviewers: RKSimon, craig.topper, spatel
Reviewed By: craig.topper
Differential Revision: https://reviews.llvm.org/D52304
llvm-svn: 344224
There is a transform that may replace `lshr (x+1), 1` with `lshr x, 1` in case
if it can prove that the result will be the same. However the initial instruction
might have an `exact` flag set, and it now should be dropped unless we prove
that it may hold. Incorrectly set `exact` attribute may then produce poison.
Differential Revision: https://reviews.llvm.org/D53061
Reviewed By: sanjoy
llvm-svn: 344223
libtool requires this text to be present, in order to conclude that
the tool supports response files. Also add an explicit test of using
response files with llvm-nm.
Differential Revision: https://reviews.llvm.org/D53064
llvm-svn: 344222
All uses of this option have been removed, and the intent is to change the purpose and default value of this option. To prevent it from having impacts on users, this patch temporarily removes the option and purges it from CMake caches. In a few days, once this has propagated to contributors I will re-introduce the option with the new default value.
llvm-svn: 344219
Previously adding header and table gen files was conditional on using an IDE. Since these files have the `HEADER_FILE_ONLY` attribute applied they are ignored as sources by all non-IDE generators, so there is really no reason not to include them.
Additionally having the CMake always include these files allows the CMake-server to include them in the sources list for targets, which is valuable to anyone using CMake-server integrated tools.
llvm-svn: 344218
Summary:
The script to generate code coverage reports supports passing filter paths to llvm-cov when generating the HTML reports, but doesn't pass those paths to the summary generation as well. This results in a summary report that doesn't match the HTML report.
This patch addresses the problem by also passing the filter paths to the summary report generation.
Reviewers: vsk
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D53110
llvm-svn: 344217
llvm::detail is not the only namespace named detail. So if
someone has done a `using namespace llvm::support`, for example,
this will fail with an ambiguous namespace name. Granted
people generally shouldn't be using large namespaces like that,
but it's common at local function scopes.
llvm-svn: 344216
Summary:
Although the saturating float to int instructions are already
emitted from normal IR, the fpto{s,u}i instructions produce poison
values if the argument cannot fit in the result type. These intrinsics
are therefore necessary to get guaranteed defined saturating behavior.
Reviewers: aheejin, dschuff
Subscribers: sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D53004
llvm-svn: 344204
Add thin shims to C interface to provide access to DebugLoc info for
Instructions, GlobalVariables and Functions. Patch by Josh Berdine!
llvm-svn: 344202
This can be used to preserve profiling information across codebase
changes that have widespread impact on mangled names, but across which
most profiling data should still be usable. For example, when switching
from libstdc++ to libc++, or from the old libstdc++ ABI to the new ABI,
or even from a 32-bit to a 64-bit build.
The user can provide a remapping file specifying parts of mangled names
that should be treated as equivalent (eg, std::__1 should be treated as
equivalent to std::__cxx11), and profile data will be treated as
applying to a particular function if its name is equivalent to the name
of a function in the profile data under the provided equivalences. See
the documentation change for a description of how this is configured.
Remapping is supported for both sample-based profiling and instruction
profiling. We do not support remapping indirect branch target
information, but all other profile data should be remapped
appropriately.
Support is only added for the new pass manager. If someone wants to also
add support for this for the old pass manager, doing so should be
straightforward.
This is the LLVM side of Clang r344199.
Reviewers: davidxl, tejohnson, dlj, erik.pilkington
Subscribers: mehdi_amini, steven_wu, dexonsmith, llvm-commits
Differential Revision: https://reviews.llvm.org/D51249
llvm-svn: 344200
Given a library call that is represented as an llvm intrinsic call, but
later transformed to an actual call, if an overriding definition of that
library routine is provided indirectly via an alias, prevent LTO from
eliminating the definition.
This is a fix for PR38547.
Differential Revision: https://reviews.llvm.org/D52836
llvm-svn: 344198
Summary:
Global variables might declare themselves to be in explicit sections.
Calculate the entity size always to prevent assembler warnings
"entity size for SHF_MERGE not specified" when sections are to be
marked merge-able.
Fixes PR31828.
Reviewers: rnk, echristo
Reviewed By: rnk
Subscribers: llvm-commits, pirama, srhines
Differential Revision: https://reviews.llvm.org/D53056
llvm-svn: 344197
Remove tryFoldVecLoad since tryFoldLoad would call IsProfitableToFold and pick up the new check.
This saves about 5K out of ~600K on the generated isel table.
llvm-svn: 344189
Moving away from UnknownSize is part of the effort to migrate us to
LocationSizes (e.g. the cleanup promised in D44748).
This doesn't entirely remove all of the uses of UnknownSize; some uses
require tweaks to assume that UnknownSize isn't just some kind of int.
This patch is intended to just be a trivial replacement for all places
where LocationSize::unknown() will Just Work.
llvm-svn: 344186
* Support writing the DARWIN64 symbol table format.
* In darwin archives, emit a symbol table whenever requested, even
when there are no members, as the apple linker will abort if given
an archive without a symbol table.
Added tests for same, and also simplified and moved the GNU 64-bit
symbol table test into archive-symtab.test.
llvm-svn: 344183
Summary:
By moving that line into the `I` multiclass.
Reviewers: aheejin
Subscribers: dschuff, sbc100, jgravelle-google, sunfish, llvm-commits
Differential Revision: https://reviews.llvm.org/D53093
llvm-svn: 344180
Summary:
As discussed in [[ https://bugs.llvm.org/show_bug.cgi?id=38938 | PR38938 ]],
we fail to emit `BEXTR` if the mask is shifted.
We can't deal with that in `X86DAGToDAGISel` `before the address mode for the inc is selected`,
and we can't really do it in the normal DAGCombine, because we don't have generic `ISD::BitFieldExtract` node,
and if we simply turn the shifted mask into a normal mask + shift-left, it will be folded back.
So it would seem X86ISelLowering is the place to handle this.
This patch only moves the matchBEXTRFromAnd()
from X86DAGToDAGISel to X86ISelLowering.
It does not add support for the 'shifted mask' pattern.
Reviewers: RKSimon, craig.topper, spatel
Reviewed By: RKSimon
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D52426
llvm-svn: 344179
Adding a new reduction pattern match for vectorizing code similar to TSVC s3111:
for (int i = 0; i < N; i++)
if (a[i] > b)
sum += a[i];
This patch adds support for fadd, fsub and fmull, as well as multiple
branches and different (but compatible) instructions (ex. add+sub) in
different branches.
I have forwarded to trunk, added fsub and fmul functionality and
additional tests, but the credit goes to Takahiro, who did most of the
actual work.
Differential Revision: https://reviews.llvm.org/D49168
Patch by Takahiro Miyoshi <takahiro.miyoshi@linaro.org>.
llvm-svn: 344172
Add a library that parses optimization remarks (currently YAML, so based
on the YAMLParser).
The goal is to be able to provide tools a remark parser that is not
completely dependent on YAML, in case we decide to change the format
later.
It exposes a C API which takes a handler that is called with the remark
structure.
It adds a libLLVMOptRemark.a static library, and it's used in-tree by
the llvm-opt-report tool (from which the parser has been mostly moved
out).
Differential Revision: https://reviews.llvm.org/D52776
Fixed the tests by removing the usage of C++11 strings, which seems not
to be supported by gcc 4.8.4 if they're used as a macro argument.
llvm-svn: 344171
Summary:
GlobalISel generates incorrect code because the legalizer artifact
combiner assumes `G_[SZ]EXT (G_IMPLICIT_DEF)` is equivalent to
`G_IMPLICIT_DEF `.
Replace `G_[SZ]EXT (G_IMPLICIT_DEF)` with 0 because the top bits
will be 0 for G_ZEXT and 0/1 for the G_SEXT.
Reviewers: aditya_nandakumar, dsanders, aemerson, javed.absar
Reviewed By: aditya_nandakumar
Subscribers: rovka, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D52996
llvm-svn: 344163
