The number of SCEV expressions is usually linear in the number of IR
instructions being modeled. However, a naive SCEV visitor is not. For
an expression like x*x, "x" will be visited twice. If x is itself an
expression like x*x, that will be visited twice, etc, and the overall
runtime is O(2^N) in the number of SCEV expressions.
To prevent this from happening, add a cache, so we only visit each SCEV
expression once.
Not sure this is the best solution. Maybe we can instead check whether
the SCEV is scop-invariant (in which case we never need to map the
value). But we don't have a utility for that at the moment.
Differential Revision: https://reviews.llvm.org/D47087
llvm-svn: 335783
conversions are only applied to operands of class type, and the second
standard conversion sequence is not applied.
When diagnosing an invalid builtin binary operator, talk about the
original types rather than the converted types. If these differ by a
user-defined conversion, tell the user what happened.
llvm-svn: 335781
Using @import in framework headers inhibit the use of such headers
when not using modules, this is specially bad for headers that end
up in the SDK (or any other system framework). Add a warning to give
users some indication that this is discouraged.
rdar://problem/39192894
llvm-svn: 335780
The android buildbot moves the build outputs to a different directory
and rewrites the executable path, the DSO passed as an argument does not
get re-written. Use rpaths to load the DSO the same way the
test/cfi/cross-dso/ tests do and test the DSO name differently.
llvm-svn: 335777
When running the test suite with .debug_names a bunch of tests were
failing because GetCompleteObjCClass was not yet implemented for
DebugNamesDWARFIndex. This patch adds the required logic.
We use the .debug_names to find the Objective-C class and then rely on
DW_AT_APPLE_objc_complete_type to find the complete type. If we can't
find it or the attribute is not supported, we return a list of potential
complete types.
Differential revision: https://reviews.llvm.org/D48596
llvm-svn: 335776
Summary:
HIP should link the bitcodes with caller functions before callee functions. Also added lit test to check the ordering of the linked bitcodes is matches.
Reviewers: yaxunl, b-sumner
Reviewed By: yaxunl, b-sumner
Subscribers: cfe-commits, yaxunl, b-sumner, scchan
Differential Revision: https://reviews.llvm.org/D48667
llvm-svn: 335774
Summary:
The instantiation of the drop_begin function template usually fails because the functions begin() and end() do not exist. Only when using on a container from the std namespace (or `llvm::iterator_range`s of something derived from `std::iterator`), they are matched to std::begin() and std::end() due to Koenig-lookup.
Explicitly use llvm::adl_begin and llvm::adl_end to make drop_begin applicable to anything iterable (including C-style arrays).
A solution for general `llvm::iterator_range`s was already tried in r244620, but got reverted in r244621 due to MSVC not liking it.
Reviewers: dblaikie, grosbach, aaron.ballman, ruiu
Reviewed By: dblaikie, aaron.ballman
Subscribers: aaron.ballman, llvm-commits
Differential Revision: https://reviews.llvm.org/D48598
llvm-svn: 335772
Summary:
This PR adds a few acronyms related to hashing algorithms to the standard
list in `objc-property-declaration`.
Reviewers: Wizard
Reviewed By: Wizard
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D48652
llvm-svn: 335770
The %eiz/%riz are dummy registers that force the encoder to emit a SIB byte when it normally wouldn't. By emitting them in the disassembly output we ensure that assembling the disassembler output would also produce a SIB byte.
This should match the behavior of objdump from binutils.
llvm-svn: 335768
Now that we have the ability to legalize based on MMO's. Add support for
legalizing based on AtomicOrdering and use it to correct the legalization
of the atomic instructions.
Also extend all() to be a variadic template as this ruleset now requires
3 and 4 argument versions.
llvm-svn: 335767
Fix test changes added in r335760. Even though we are invoking llvm-lto2
in single threaded mode, the order of processing the modules in the
backend is apparently not deterministic. Handle the expected debug
messages in any order. (The determinism would be good to fix, but not
related to this change.)
This also undoes the change I made in r335764 to help debug this.
llvm-svn: 335766
Summary:
Use oclc_daz_opt_on.amdgcn.bc bitcode when option fcuda-flush-denormal-to-zero is enabled, otherwise use oclc_daz_opt_off.amdgcn.bc bitcode. Added lit tests to verify that the correct bitcode is linked when -fcuda-flush-denormal-to-zero option is enabled or disabled.
Reviewers: yaxunl, scchan, b-sumner
Reviewed By: yaxunl, scchan, b-sumner
Subscribers: cfe-commits, yaxunl
Differential Revision: https://reviews.llvm.org/D48493
llvm-svn: 335765
I am getting bot failures from r335760 that are difficult to diagnose
since the stderr is getting redirected to FileCheck. Save and dump the
debug output to stderr to help debug the issue.
llvm-svn: 335764
This matches the way NVCC does it. Doing module cleanup at global
destructor phase used to work, but is, apparently, too late for
the CUDA runtime in CUDA-9.2, which ends up crashing with double-free.
Differential Revision: https://reviews.llvm.org/D48613
llvm-svn: 335763
Summary:
Setting UBSAN_OPTIONS=silence_unsigned_overflow=1 will silence all UIO
reports. This feature, combined with
-fsanitize-recover=unsigned-integer-overflow, is useful for providing
fuzzing signal without the excessive log output.
Helps with https://github.com/google/oss-fuzz/issues/910.
Reviewers: kcc, vsk
Reviewed By: vsk
Subscribers: vsk, kubamracek, Dor1s, llvm-commits
Differential Revision: https://reviews.llvm.org/D48660
llvm-svn: 335762
As noted in the D44909 review, the transform from (fptosi+sitofp) to ftrunc
can produce -0.0 where the original code does not:
#include <stdio.h>
int main(int argc) {
float x;
x = -0.8 * argc;
printf("%f\n", (float)((int)x));
return 0;
}
$ clang -O0 -mavx fp.c ; ./a.out
0.000000
$ clang -O1 -mavx fp.c ; ./a.out
-0.000000
Ideally, we'd use IR/node flags to predicate the transform, but the IR parser
doesn't currently allow fast-math-flags on the cast instructions. So for now,
just use the function attribute that corresponds to clang's "-fno-signed-zeros"
option.
Differential Revision: https://reviews.llvm.org/D48085
llvm-svn: 335761
Summary:
Rather than just print the GUID, when it is available in the index,
print the global name as well in the function import thin link debug
messages. Names will be available when the combined index is being
built by the same process, e.g. a linker or "llvm-lto2 run".
Reviewers: davidxl
Subscribers: mehdi_amini, inglorion, eraman, steven_wu, llvm-commits
Differential Revision: https://reviews.llvm.org/D48612
llvm-svn: 335760
If you've already loaded an IRObjectFile and need access to the
Modules themselves you shouldn't have to reparse a byte stream to do
it. Adds an accessor for the modules in IRObjectFile.
llvm-svn: 335759
It isn't safe to outline sequences of instructions where x16/x17/nzcv live
across the sequence.
This teaches the outliner to check whether or not a specific canidate has
x16/x17/nzcv live across it and discard the candidate in the case that that is
true.
https://bugs.llvm.org/show_bug.cgi?id=37573https://reviews.llvm.org/D47655
llvm-svn: 335758
As brought up during the discussion of the DWARF5 accelerator tables,
there is currently no way to associate Objective-C methods with the
interface they belong to, other than the .apple_objc accelerator table.
After due consideration we came to the conclusion that it makes more
sense to follow Pavel's suggestion of just emitting this information in
the .debug_info section. One concern was that categories were
emitted in the .apple_names as well, but it turns out that LLDB doesn't
rely on the accelerator tables for this information.
This patch changes the codegen behavior to emit subprograms for
structure types, like we do for C++. This will result in the
DW_TAG_subprogram being nested as a child under its
DW_TAG_structure_type. This behavior is only enabled for DWARF5 and
later, so we can have a unique code path in LLDB with regards to
obtaining the class methods.
This was tested on the LLDB side and doesn't lead to a regression.
There's already code in place to deal with member functions in C++,
which deals with this transparently.
For more background please refer to the discussion on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-June/123986.html
Differential revision: https://reviews.llvm.org/D48241
llvm-svn: 335757
If we are just modifying a single bit at a variable bit position we can use the BT* instructions to make the change instead of shifting a 1(or rotating a -1) and doing a binop. These instruction also ignore the upper bits of their index input so we can also remove an and if one is present on the index.
Fixes PR37938.
llvm-svn: 335754
Summary:
AliasSet::print uses `I->printAsOperand` to print UnknownInstructions. The problem is that not all UnknownInstructions have names (e.g. call instructions). When such instructions are printed, they appear as `<badref>` in AliasSets, which is very confusing, as the values are perfectly valid.
This patch fixes that by printing UnknownInstructions without a name using `print` instead of `printAsOperand`.
Reviewers: asbirlea, chandlerc, sanjoy, grosser
Reviewed By: asbirlea
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D48609
llvm-svn: 335751
This patch splits off some abstractions used by dsymutil's dwarf linker
and moves them into separate header and implementation files. This
almost halves the number of LOC in DwarfLinker.cpp and makes it a lot
easier to understand what functionality lives where.
Differential revision: https://reviews.llvm.org/D48647
llvm-svn: 335749
Summary:
This patch removes a few callbacks from Pipeline. It comes at the cost of
registering Listeners with all Stages. Not all stages need listeners or issue
callbacks, this registration is a bit redundant. However, as we build-out the
API, this redundancy can disappear.
The main purpose here is to move callback code from the Pipeline and into the
stages that actually issue those callbacks. This removes the back-pointer to
the Pipeline that was put into a few Stage subclasses.
Reviewers: andreadb, courbet, RKSimon
Reviewed By: andreadb, courbet
Subscribers: tschuett, gbedwell, llvm-commits
Differential Revision: https://reviews.llvm.org/D48576
llvm-svn: 335748
On Darwin/x86_64, asan may report the crashing line of NullDeref as line
19 (i.e the closing brace of the function), whereas on other targets we
see line 15 ("ptr[10]++").
The optimized debug info here isn't reliable enough to check.
rdar://problem/41526369
llvm-svn: 335747
I think the intrinsics named 'avx512.mask.' should refer to the previous behavior of taking a mask argument in the intrinsic instead of using a 'select' or 'and' instruction in IR to accomplish the masking. This is more consistent with the goal that eventually we will have no intrinsics that have masking builtin. When we reach that goal, we should have no intrinsics named "avx512.mask".
llvm-svn: 335744
If a source of rcp instruction is a result of any conversion from
an integer convert it into rcp_iflag instruction. No FP exception
can ever happen except division by zero if a single precision rcp
argument is a representation of an integral number.
Differential Revision: https://reviews.llvm.org/D48569
llvm-svn: 335742
On some ARM platforms this test depends on debug locations being
present on constant materialization code, which was eliminated in
r335497.
Relax the test to allow two outcomes: the backtrace either contains the
right line numbers, or no line numbers.
llvm-svn: 335741
Summary:
Add an extension point to allow registration of statically-linked Clang Static
Analyzer checkers that are not a part of the Clang tree. This extension point
employs the mechanism used when checkers are registered from dynamically loaded
plugins.
Reviewers: george.karpenkov, NoQ, xazax.hun, dcoughlin
Reviewed By: george.karpenkov
Subscribers: mgorny, mikhail.ramalho, rnkovacs, xazax.hun, szepet, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D45718
llvm-svn: 335740
Currently, ICF does not enable threading if we have less than 1024
sections in each equivalence class.
And the following code is uncovered by our test cases:
https://github.com/llvm-mirror/lld/blob/master/ELF/ICF.cpp#L404
This patch adds a test case that triggers the mentioned code to execute.
llvm-svn: 335738
Summary:
(Originally started as a clang-tidy check but there's already D45444 so shifted to just adding ExprMutationAnalyzer)
`ExprMutationAnalyzer` is a generally useful helper that can be used in different clang-tidy checks for checking whether a given expression is (potentially) mutated within a statement (typically the enclosing compound statement.)
This is a more general and more powerful/accurate version of isOnlyUsedAsConst, which is used in ForRangeCopyCheck, UnnecessaryCopyInitialization.
It should also be possible to construct checks like D45444 (suggest adding const to variable declaration) or https://bugs.llvm.org/show_bug.cgi?id=21981 (suggest adding const to member function) using this helper function.
This function is tested by itself and is intended to stay generally useful instead of tied to any particular check.
Reviewers: hokein, alexfh, aaron.ballman, ilya-biryukov, george.karpenkov
Reviewed By: aaron.ballman
Subscribers: lebedev.ri, shuaiwang, rnkovacs, hokein, alexfh, aaron.ballman, a.sidorin, Eugene.Zelenko, xazax.hun, JonasToth, klimek, mgorny, cfe-commits
Tags: #clang-tools-extra
Patch by Shuai Wang.
Differential Revision: https://reviews.llvm.org/D45679
llvm-svn: 335736
Fangrui Song