The condition used to decide if need to copy probability should be reversed.

Differential Revision: https://reviews.llvm.org/D87417

Before tackling http://llvm.org/PR38722, make sure there is a baseline
benchmark.

Differential Revision: https://reviews.llvm.org/D62778

This is a follow up commit for the issue raised in
https://reviews.llvm.org/D86879

The summary and very short discussion in D82122 summarizes whats happening here.

In short, liveness talks about variables, or expressions, anything that
has a value. Well, statements just simply don't have a one.

Differential Revision: https://reviews.llvm.org/D82598

Add a verifier for the loop op in the OpenACC dialect. Check basic restriction
from 2.9 Loop construct from the OpenACC 3.0 specs.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D87546

Forward declare AAResults instead of the (old) AliasAnalysis type.

Remove includes from SLPVectorizer.cpp that are already included in SLPVectorizer.h.

[libc++] Use allocator_traits to consistently allocate/deallocate/construct/destroy objects in std::any

https://llvm.org/PR45099 notes (correctly) that we're inconsistent in memory
allocation in `std::any`. We allocate memory with `std::allocator<T>::allocate`,
construct with placement new, destroy by calling the destructor directly, and
deallocate by calling `delete`. Most of those are customizable by the user,
but in different ways.

The standard is silent on how these things are to be accomplished.
This patch makes it so we use `allocator_traits<allocator<T>>` for all
of these operations (allocate, construct, destruct, deallocate).
This is, at least, consistent.

Fixes https://llvm.org/PR45099.

Differential Revision: https://reviews.llvm.org/D81133

If the constant operand is the opposite of the min/max value,
then the result must be the other value.

This is based on the similar codegen transform proposed in:
D87571

Differential Revision: https://reviews.llvm.org/D86532

[llvm-readobj/elf] - Don't crash when the size of s dynamic symbol table, inferred from the hash table, is broken.

Currently we might derive the dynamic symbol table size from the DT_HASH hash table (using its `nchain` field).
It is possible to crash dumpers with a broken relocation that refers to a symbol with an index
that is too large. To trigger it, the inferred size of the dynamic symbol table should go past the end of the object.

This patch adds a size validation + warning.

Differential revision: https://reviews.llvm.org/D86923

Add the BufferSize argument constraint to fread and fwrite. This change
itself makes it possible to discover a security critical case, described
in SEI-CERT ARR38-C.

We also add the not-null constraint on the 3rd arguments.

In this patch, I also remove those lambdas that don't take any
parameters (Fwrite, Fread, Getc), thus making the code better
structured.

Differential Revision: https://reviews.llvm.org/D87081

Differential Revision: https://reviews.llvm.org/D87689

Differential Revision: https://reviews.llvm.org/D87690

Differential Revision: https://reviews.llvm.org/D87687

Add Thread Local Storage Local Exec support to LLD. This is to support PC Relative addressing of Local Exec.
The patch teaches LLD to handle:
```
paddi r9, r13, x1@tprel
```
The relocation is:
```
R_PPC_TPREL34
```

Reviewed By: NeHuang, MaskRay

Differential Revision: https://reviews.llvm.org/D86608

2508ef01 doesn't totally fix the issue since we did not handle the case
when unused temporary negated result is the same with the result, which
is found by address sanitizer.

GetElementPtrInst::Create returns a GetElementPtrInst* so we don't need to cast. Similarly IntegerType inherits from the Type base class.

Also, I've used auto* in a few places to cleanup the code.

Helps fix some clang-tidy warnings which saw the dyn_casts and warned that these can return null.

The FailureReason input parameter maybe null, we check this in all other cases in the method but this one was missed somehow.

Fixes clang-tidy warning.

This patch adds the missing print for the vector_length in the parallel operation.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D87630

This add canonicalizer for

- extracting an element from a dynamic_tensor_from_elements
- propagating constant operands to the type of dynamic_tensor_from_elements

Differential Revision: https://reviews.llvm.org/D87525

There at least one other bug related to pow -> sqrt transforms:
http://lists.llvm.org/pipermail/llvm-dev/2020-September/145051.html
...but we probably can't solve that without fixing this first.

The code drops the sqrt op instead of bailing out,
so this is very wrong.

This is not a valid transform unless we can prove
that the program does not read errno after the pow
call and before some other function changes it.

This test tries to create a 2 GiB std::string, catching the bad_alloc
exception if the allocation fails. However, for no-exceptions builds
there is no way for the error to be reported, so this crashes with a
null pointer dereference.

Differential revision: https://reviews.llvm.org/D87682

With https://reviews.llvm.org/D87537 we made it an error
to import or export a mutable global with the +mutable-globals
feature present.  However the scan was of the entire symbol
table rather than just the imports or exports and the filter
didn't match exaclyt meaning the `__stack_pointer` (a mutable
global) was always triggering with error when the `--export-all`
flag was used.

This also revealed that we didn't have any test coverage for
the `--export-all` flag.

This change fixes the current breakage on the emscripten-releases
roller.

Differential Revision: https://reviews.llvm.org/D87663

Adds a new GettingInvolved page to documentation which provides details about
mailing list, chats and calls.

Adds a sidebar page which provides common links on
all documentation pages.
The links include:
-  Getting Started
-  Getting Involved
-  Github Repository
-  Bug Reports
-  Code Review

Depends on https://reviews.llvm.org/D87242

Reviewed By: richard.barton.arm

Differential Revision: https://reviews.llvm.org/D87270

This patch adds a isConditionImplied function that
takes a constraint and returns true if the constraint
is implied by the current constraints in the system.

Reviewed By: spatel

Differential Revision: https://reviews.llvm.org/D84545

Restrict UnnecessaryCopyInitialization check to variables initialized from free functions without arguments

This restriction avoids cases where an alias is returned to an argument and
which could lead to to a false positive change.

Setting _LIBCPP_HAS_NO_THREADS is needed when building libcxxabi without
threads in standalone mode. This is useful when target WASM. Otherwise,
you get an error like "No thread API" when building libcxxabi.

It would be better to link against a properly-configured libc++ headers
CMake target when building libc++abi instead, but we don't generate such
targets yet.

Thanks to Matthew Bauer for the patch.

Differential Revision: https://reviews.llvm.org/D60743

More remaining dependencies down to LoopCacheAnalysis.cpp

Forward declare AAResults instead of the (old) AliasAnalysis type.

These are all directly included in AliasSetTracker.h

Loop tripcount expressions have a positive range, so use unsigned SCEV ranges
for them.

Differential Revision: https://reviews.llvm.org/D87608

The "takeName" logic in ScalarizerVisitor::gather did not consider
that the value vector could refer to non-instructions, such as
global variables. This patch make sure that we avoid changing the
name of a value if it isn't an instruction.

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D87685

qemu calls the "fp" and "lr" registers via their generic names
(x29/x30). This mismatch manifested itself as not being able to unwind
or display values of some local variables.

lldbUtilityHelpers does not depend on lldbSymbolHelpers. Remove that
dependency, and add direct lldbSymbolHelpers dependencies where needed.