I want to reuse this code in SimplifyDemandedBits handling of Add/Sub. This will make that easier.
Wonder if we should use it in SelectionDAG's computeKnownBits too.
Differential Revision: https://reviews.llvm.org/D36433
llvm-svn: 310378
Summary:
Tools like clang that use RemoveFileOnSignal on their output files
weren't actually able to clean up their outputs before this change. Now
the call to llvm::sys::fs::remove succeeds and the temporary file is
deleted. This is a stop-gap to fix clang before implementing the
solution outlined in PR34070.
Reviewers: davide
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D36337
llvm-svn: 310137
Summary:
It was added to support clang warnings about includes with case
mismatches, but it ended up not being necessary.
Reviewers: twoh, rafael
Subscribers: hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D36328
llvm-svn: 310078
The full story is in the comments:
// Do not attempt to close stdout or stderr. We used to try to maintain the
// property that tools that support writing file to stdout should not also
// write informational output to stdout, but in practice we were never able to
// maintain this invariant. Many features have been added to LLVM and clang
// (-fdump-record-layouts, optimization remarks, etc) that print to stdout, so
// users must simply be aware that mixed output and remarks is a possibility.
NFC, I am just updating comments to reflect reality.
llvm-svn: 310016
The file is called "intrin.h". When building targeting Windows on a Linux
system, with the SDK mounted in a case-insensitive file system, "Intrin.h" will
miss clang's intrin.h header (because that's not in a case-insensitive file
system) but then find intrin.h in the Microsoft SDK. clang can't handle the
SDK's intrin.h.
https://reviews.llvm.org/D36281
llvm-svn: 309980
Found it during work on LLD, it would crash on following
linker script:
SECTIONS { .foo : { *("*®") } }
That happens because ® has int value -82. And chars are used as
array index in code, and are signed by default.
Differential revision: https://reviews.llvm.org/D35891
llvm-svn: 309549
Summary:
Using c++11 enum classes ensures that only valid enum values are used
for ArchKind, ProfileKind, VersionKind and ISAKind. This removes the
need for checks that the provided values map to a proper enum value,
allows us to get rid of AK_LAST and prevents comparing values from
different enums. It also removes a bunch of static_cast
from unsigned to enum values and vice versa, at the cost of introducing
static casts to access AArch64ARCHNames and ARMARCHNames by ArchKind.
FPUKind and ArchExtKind are the only remaining old-style enum in
TargetParser.h. I think it's beneficial to keep ArchExtKind as old-style
enum, but FPUKind can be converted too, but this patch is quite big, so
could do this in a follow-up patch. I could also split this patch up a
bit, if people would prefer that.
Reviewers: rengolin, javed.absar, chandlerc, rovka
Reviewed By: rovka
Subscribers: aemerson, kristof.beyls, llvm-commits
Differential Revision: https://reviews.llvm.org/D35882
llvm-svn: 309287
This patch improves our guessing of unknown Intel CPUs to support Goldmont and skylake-avx512.
Differential Revision: https://reviews.llvm.org/D35161
llvm-svn: 309246
Summary:
Previously were in support. Since many many things depend on support,
were all forced to also depend on libxml2, which we only want in a few cases.
This puts all the libxml2 deps in a separate lib to be used only in a few
places.
Reviewers: ruiu, thakis, rnk
Subscribers: mgorny, hiraditya, llvm-commits
Differential Revision: https://reviews.llvm.org/D35819
llvm-svn: 309070
Summary:
Does a simple merge, where mergeable elements are combined, all others
are appended. Does not apply trickly namespace rules.
Subscribers: llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35753
llvm-svn: 309047
Summary: Implement parsing and writing of a single xml manifest file.
Subscribers: mgorny, llvm-commits, hiraditya
Differential Revision: https://reviews.llvm.org/D35425
llvm-svn: 308679
As a follow up of the bad alloc handler patch, this patch introduces nullptr checks on pointers returned from the
malloc/realloc/calloc functions. In addition some memory size assignments are moved behind the allocation
of the corresponding memory to fulfill exception safe memory management (RAII).
patch by Klaus Kretzschmar
Differential Revision: https://reviews.llvm.org/D35414
llvm-svn: 308576
It was warning like:
../llvm-project/llvm/lib/Support/ErrorHandling.cpp:172:51: warning:
ignoring return value of ‘ssize_t write(int, const void*, size_t)’,
declared with attribute warn_unused_result [-Wunused-result]
(void)::write(2, OOMMessage, strlen(OOMMessage));
Work around the warning by storing the return value in a variable and
casting that to void instead. We already did this for the other write()
call in this file.
llvm-svn: 308483
This patch series adds support for the IBM z14 processor. This part includes:
- Basic support for the new processor and its features.
- Support for new instructions (except vector 32-bit float and 128-bit float).
- CodeGen for new instructions, including new LLVM intrinsics.
- Scheduler description for the new processor.
- Detection of z14 as host processor.
Support for the new 32-bit vector float and 128-bit vector float
instructions is provided by separate patches.
llvm-svn: 308194
Summary:
The current yaml::Input constructor takes a StringRef of data as its
first parameter, discarding any filename information that may have been
present when a YAML file was opened. Add an alterate yaml::Input
constructor that takes a MemoryBufferRef, which can have a filename
associated with it. This leads to clearer diagnostic messages.
Sponsored By: DARPA, AFRL
Reviewed By: arphaman
Differential Revision: https://reviews.llvm.org/D35398
Patch by: Jonathan Anderson (trombonehero)
llvm-svn: 308172
We're already using it in 64-bit builds because 64-bit MSVC doesn't support inline assembly.
As far as I know we were using inline assembly because at the time the code was added we had to support MSVC 2008 pre-SP1 while the intrinsic was added to MSVC in SP1. Now that we don't have to support that we should be able to just use the intrinsic.
llvm-svn: 308163
As far as I can tell we can simply distinguish based on features rather than model number. Many of the strings we were previously using are treated the same by the backend.
llvm-svn: 307884
Summary: Different JITs and other clients of LLVM may have different needs in how symbol resolution should occur.
Reviewers: v.g.vassilev, lhames, karies
Reviewed By: v.g.vassilev
Subscribers: pcanal, llvm-commits
Differential Revision: https://reviews.llvm.org/D33529
llvm-svn: 307849
ManagedStatic<sys::Mutex> would lazilly allocate a sys::Mutex to lock
when reporting an OOM, which is a bad idea.
The three STL implementations that I know of use pthread_mutex_lock and
EnterCriticalSection to implement std::mutex. I'm pretty sure that
neither of those allocate heap memory.
It seems that we unconditionally use std::mutex without testing
LLVM_ENABLE_THREADS elsewhere in the codebase, so this should be
portable.
llvm-svn: 307827
This adds all the feature bits libgcc has. They will soon be added to compiler-rt as well. This adds a second 32 bit feature variable to hold the bits that are needed by getHostCPUName that are not in libgcc. libgcc had already used 31 of the 32 bits in the existing variable and we needed 3 bits so at minimum 2 bits would spill over. I chose to move all 3.
llvm-svn: 307758
Summary:
A space was added between '-' and 'help' when emitting help output.
See https://reviews.llvm.org/D22621 for details.
Reviewers: MaggieYi, vsk
Reviewed By: vsk
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D35283
llvm-svn: 307745
Summary:
Patch by Klaus Kretzschmar
We would like to introduce a new type of llvm error handler for handling
bad alloc fault situations. LLVM already provides a fatal error handler
for serious non-recoverable error situations which by default writes
some error information to stderr and calls exit(1) at the end (functions
are marked as 'noreturn').
For long running processes (e.g. a server application), exiting the
process is not an acceptable option, especially not when the system is
in a temporary resource bottleneck with a good chance to recover from
this fault situation. In such a situation you would rather throw an
exception to stop the current compilation and try to overcome the
resource bottleneck. The user should be aware of the problem of throwing
an exception in bad alloc situations, e.g. you must not do any
allocations in the unwind chain. This is especially true when adding
exceptions in existing unfamiliar code (as already stated in the comment
of the current fatal error handler)
So the new handler can also be used to distinguish from general fatal
error situations where recovering is no option. It should be used in
cases where a clean unwind after the allocation is guaranteed.
This patch contains:
- A report_bad_alloc function which calls a user defined bad alloc
error handler. If no user handler is registered the
report_fatal_error function is called. This function is not marked as
'noreturn'.
- A install/restore_bad_alloc_error_handler to install/restore the bad
alloc handler.
- An example (in Mutex.cpp) where the report_bad_alloc function is
called in case of a malloc returns a nullptr.
If this patch gets accepted we would create similar patches to fix
corresponding malloc/calloc usages in the llvm code.
Reviewers: chandlerc, greened, baldrick, rnk
Reviewed By: rnk
Subscribers: llvm-commits, MatzeB
Differential Revision: https://reviews.llvm.org/D34753
llvm-svn: 307673
These asserts could only occur if we fail to properly detect the compiler, but an assert is not a good way to do that because it doesn't work in release builds.
I wonder if we could use #error?
llvm-svn: 307520
Users of getHostCPUName should also use getHostCPUFeatures which will take care of making sure avx512 is disabled if the CPU doesn't support it. This is consistent with what we do for other CPUs.
llvm-svn: 307495
Summary:
(re)definition of _RESTRICT_KYWD rightfully causes a warning message during the Solaris build.
This hack is not needed if build compiler is properly configured (.e.g /usr/bin/gcc) so just remove it.
Reviewers: ro, mgorny, krytarowski, joerg
Reviewed By: joerg
Subscribers: quenelle, llvm-commits
Patch by Fedor Sergeev (Oracle).
Differential Revision: https://reviews.llvm.org/D35054
llvm-svn: 307469
The CPU name is really just used for scheduler and other microarchitectural optimizations. The feature flags should be determined by getHostCPUFeatures which should always be used with getHostCPUName. Trying to alter CPU name strings to control features just isn't practical.
Most of these types of things were removed from Intel CPUs a while ago.
This is part of my plan to bring compiler-rt's cpu_model.c file up to date with the equivalent functionality in libgcc. A lot of the code in that file is copied from Host.cpp and we want to keep them reasonably in sync.
llvm-svn: 307467
the system's version of macOS
sys::getProcessTriple returns LLVM_HOST_TRIPLE, whose system version might not
be the actual version of the system on which the compiler running. This commit
ensures that, for macOS, sys::getProcessTriple returns a triple with the
system's macOS version.
rdar://33177551
Differential Revision: https://reviews.llvm.org/D34446
llvm-svn: 307372
This is a short-term fix for PR33650 aimed to get the modules build bots green again.
Remove all the places where we use the LLVM_YAML_IS_(FLOW_)?SEQUENCE_VECTOR
macros to try to locally specialize a global template for a global type. That's
not how C++ works.
Instead, we now centrally define how to format vectors of fundamental types and
of string (std::string and StringRef). We use flow formatting for the former
cases, since that's the obvious right thing to do; in the latter case, it's
less clear what the right choice is, but flow formatting is really bad for some
cases (due to very long strings), so we pick block formatting. (Many of the
cases that were using flow formatting for strings are improved by this change.)
Other than the flow -> block formatting change for some vectors of strings,
this should result in no functionality change.
Differential Revision: https://reviews.llvm.org/D34907
Corresponding updates to clang, clang-tools-extra, and lld to follow.
llvm-svn: 306878
The difference from the previous version is the use of decltype, as the
implementation of std::result_of in libc++ did not work correctly for
variadic function like open(2).
Original summary:
This function retries an operation if it was interrupted by a signal
(failed with EINTR). It's inspired by the TEMP_FAILURE_RETRY macro in
glibc, but I've turned that into a template function. I've also added a
fail-value argument, to enable the function to be used with e.g.
fopen(3), which is documented to fail for any reason that open(2) can
fail (which includes EINTR).
The main user of this function will be lldb, but there were also a
couple of uses within llvm that I could simplify using this function.
Reviewers: zturner, silvas, joerg
Subscribers: mgorny, llvm-commits
Differential Revision: https://reviews.llvm.org/D33895
llvm-svn: 306671
Ananas is a home-brew operating system, mainly for amd64 machines. After
using GCC for quite some time, it has switched to clang and never looked
back - yet, having to manually patch things is annoying, so it'd be much
nicer if this was in the official tree.
More information:
https://github.com/zhmu/ananas/https://rink.nu/projects/ananas.html
Submitted by: Rink Springer
Differential Revision: https://reviews.llvm.org/D32937
llvm-svn: 306237
Benjamin Kramer