llvm-svn: 365691

Since we have distinct types for pointers and scalars, G_INTTOPTRs can sometimes
obstruct attempts to find constant source values. These usually come about when
try to do some kind of null pointer check. Teaching getConstantVRegValWithLookThrough
about this operation allows the CBZ/CBNZ optimization to catch more cases.

This change also improves the case where we can't find a constant source at all.
Previously we would emit a cmp, cset and tbnz for that. Now we try to just emit
a cmp and conditional branch, saving an instruction.

The cumulative code size improvement of this change plus D64354 is 5.5% geomean
on arm64 CTMark -O0.

Differential Revision: https://reviews.llvm.org/D64377

llvm-svn: 365690

llvm-svn: 365689

Python 3.6 and 3.7 have been released.

Differential Revision: https://reviews.llvm.org/D64444

Patch from Christian Biesinger <cbiesinger@google.com>!

llvm-svn: 365688

Implements an HTML generator.
Nodes are used to represent each part of the HTML file. There are TagNodes that
represent every HTML tag (p, h1, div, ...) and they have children nodes, which
can be TagNodes or TextNodes (these nodes only have text).
Proper indentation is rendered within the files generated by tool.
No styling (CSS) is included.

Committed on behalf of Diego Astiazarán (diegoaat97@gmail.com)

Differential Revision: https://reviews.llvm.org/D63857

llvm-svn: 365687

Reverting du to reverting r365618

This reverts commit b1e76d1d41c2303f70b53e352bdefbff2a2a9d37.

llvm-svn: 365686

This reverts commit 8507eca1647118e73435b0ce1de8a1952a021d01.

Reveting due to some suspicious failurse in santizer-x86_64-linux.

llvm-svn: 365685

Some minor cleanup.

This function in Utils does the same thing as `findMIFromReg`. It also looks
through copies, which `findMIFromReg` didn't.

Delete `findMIFromReg` and use `getOpcodeDef` instead. This only happens in
`tryOptVectorDup` right now.

Update opt-shuffle-splat to show that we can look through the copies now, too.

Differential Revision: https://reviews.llvm.org/D64520

llvm-svn: 365684

There are a few places where we walk over copies throughout
AArch64InstructionSelector.cpp. In Utils, there's a function that does exactly
this which we can use instead.

Note that the utility function works with the case where we run into a COPY
from a physical register. We've run into bugs with this a couple times, so using
it should defend us from similar future bugs.

Also update opt-fold-compare.mir to show that we still handle physical registers
properly.

Differential Revision: https://reviews.llvm.org/D64513

llvm-svn: 365683

The DetectLibcxxIncludePath function had been using
llvm::sys::fs::directory_iterator, and this updates it to use
llvm::vfs::directory_iterator.

Differential Revision: https://reviews.llvm.org/D64381

llvm-svn: 365682

llvm-svn: 365681

This broke some PPC prefetching tests.

This reverts commit 9fdfb045.

llvm-svn: 365680

Move three folds for FADD, FSUB and FMUL in the DAG combiner away from Unsafe to more aligned checks that reflect context

Summary: Unsafe does not map well alone for each of these three cases as it is missing NoNan context when accessed directly with clang.  I have migrated the fold guards to reflect the expectations of handing nan and zero contexts directly (NoNan, NSZ) and some tests with it.  Unsafe does include NSZ, however there is already precedent for using the target option directly to reflect that context. 

Reviewers: spatel, wristow, hfinkel, craig.topper, arsenm

Reviewed By: arsenm

Subscribers: michele.scandale, wdng, javed.absar

Differential Revision: https://reviews.llvm.org/D64450

llvm-svn: 365679

This reverts commit d5214dfa.

It's causing failures, both in our local CI and the PS4 Windows bot.

http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/26872/steps/test/logs/stdio

llvm-svn: 365678

There are pre-made utilities doing this. If somebody finds an
use for it and wants to resurrect, I would recommend to revise
the error messages.

llvm-svn: 365677

Rework the TTI cache and software prefetching APIs to prepare for the
introduction of a general system model.  Changes include:

- Marking existing interfaces const and/or override as appropriate
- Adding comments
- Adding BasicTTIImpl interfaces that delegate to a subtarget
  implementation
- Adding a default "no information" subtarget implementation

Only a handful of targets use these interfaces currently: AArch64,
Hexagon, PPC and SystemZ.  AArch64 already has a custom subtarget
implementation, so its custom TTI implementation is migrated to use
the new facilities in BasicTTIImpl to invoke its custom subtarget
implementation.  The custom TTI implementations continue to exist for
the other targets with this change.  They are not moved over to
subtarget-based implementations.

The end goal is to have the default subtarget implementation defer to
the system model defined by the target.  With this change, the default
subtarget implementation essentially returns "no information" for
these interfaces.  None of the existing users of TTI will hit that
implementation because they define their own custom TTI
implementations and won't use the BasicTTIImpl implementations.

Once system models are in place for the targets that use these
interfaces, their custom TTI implementations can be removed.

Differential Revision: https://reviews.llvm.org/D63614

llvm-svn: 365676

Previously reverted in 364141 due to buildbot breakage, and fixed here
by making GeneralCategory global a ManagedStatic.

Summary:
This change processes `OptionCategory`s and `SubCommand`s as they
are seen instead of caching them in the Option class and processing
them later.  Doing so simplifies the work needed to be done by the Global
parser and significantly reduces the size of the Option class to a mere 64
bytes.

Removing  the `OptionCategory` cache saved 24 bytes, and removing
the `SubCommand` cache saved an additional 48 bytes, for a total of a
72 byte reduction.

Reviewed By: serge-sans-paille

Tags: #llvm, #clang

Differential Revision: https://reviews.llvm.org/D62105

llvm-svn: 365675

Determine the element/load size calculations earlier and assert that they are whole bytes in size.

llvm-svn: 365674

Summary:
The map kept in loop rotate is used for instruction remapping, in order
to simplify the clones of instructions. Thus, if an instruction can be
simplified, its simplified value is placed in the map, even when the
clone is added to the IR. MemorySSA in contrast needs to know about that
clone, so it can add an access for it.
To resolve this: keep a different map for MemorySSA.

Reviewers: george.burgess.iv

Subscribers: jlebar, Prazek, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D63680

llvm-svn: 365672

LLJITBuilder now has a setCompileFunctionCreator method which can be used to
construct a CompileFunction for the LLJIT instance being created. The motivating
use-case for this is supporting ObjectCaches, which can now be set up at
compile-function construction time. To demonstrate this an example project,
LLJITWithObjectCache, is included.

llvm-svn: 365671

Hasn't been regenerated since the update script could merge 32/64-bit checks.

llvm-svn: 365670

[X86] Change the IR sequence for _mm_storeh_pi and _mm_storel_pi to perform the store as a <2 x float> instead of i64.

This is similar to what we do for loadl_pi and loadh_pi.

llvm-svn: 365669

[X86] Add guards to some of the x86 intrinsic tests to skip 64-bit mode only intrinsics when compiled for 32-bit mode.

All the command lines are for 64-bit mode, but sometimes I compile
the tests in 32-bit mode to see what assembly we get and we need
to skip these to do that.

llvm-svn: 365668

llvm-svn: 365667

Differential Revision: https://reviews.llvm.org/D63846

llvm-svn: 365666

Summary:
While investigating breakages caused by D63110, I noticed we were
building the short options strings in three places. Some of them used a
leading ':' to detect missing arguments, and some didn't. This was the
indirect cause of D63110. Here, I move the common code into a utility
function.

Also, unify the code which appends the sentinel value at the end of the
option vector, and make it harder for users to pass invalid argc-argv
combos to getopt (another component of D63110) by having the
OptionParser::Parse function take a (Mutable)ArrayRef.

This unification has uncovered that we don't handle missing arguments
while building aliases, However, it's not possible to write an effective
test for this, as right now it is not possible to return an error out of
the alias parsing code (which means we are printing the generic
"failure" message even after this patch).

Reviewers: mgorny, aprantl

Reviewed By: mgorny

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D63770

llvm-svn: 365665

Summary:
This allows passing address of labels to inline assembly "i" input
constraints.

Fixes pr/42502.

Reviewers: ostannard

Reviewed By: ostannard

Subscribers: void, echristo, nathanchance, ostannard, javed.absar, hiraditya, llvm-commits, srhines

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D64167

llvm-svn: 365664

llvm-svn: 365663

Differential Revision: https://reviews.llvm.org/D64456

llvm-svn: 365662

Differential Revision: https://reviews.llvm.org/D64455

llvm-svn: 365661

An alloca which can be sunk into the extraction region may have more
than one bitcast use. Move these uses along with the alloca to prevent
use-before-def.

Testing: check-llvm, stage2 build of clang

Fixes llvm.org/PR42451.

Differential Revision: https://reviews.llvm.org/D64463

llvm-svn: 365660

Split getLifetimeMarkers out into its own method and have it return a
struct.

Differential Revision: https://reviews.llvm.org/D64467

llvm-svn: 365659

llvm-svn: 365658

llvm-svn: 365657

We've already checked that each element is the correct contributory size for VT when we inspect the elements for Undef/Zero/Load.

llvm-svn: 365656

This renames the type so it doesn't sound like its based off the load size - as we're moving towards supporting combining loads of different sizes.

llvm-svn: 365655

With this style, a compressed section is indicated by a "z" in the section
name, instead of a section header flag. This patch consists of two small tweaks:
- use an llvm Decompressor method in order to properly detect compressed sections
- make sure we recognise .zdebug_info (and friends) when classifying section types.

llvm-svn: 365654

llvm-svn: 365653

As discussed in the original review, this may be useful,
so let's just do it.

llvm-svn: 365652

llvm-svn: 365651