Add support for the PPC64_GLINK dynamic tag which is used in the ElfV2 abi.

Differential Revision: https://reviews.llvm.org/D45574

llvm-svn: 330038

[llvm-mca] Ensure that instructions with a schedule read-advance are always issued in the right order.

Normally, the Scheduler prioritizes older instructions over younger instructions
during the instruction issue stage. In one particular case where a dependent
instruction had a schedule read-advance associated to one of the input operands,
this rule was not correctly applied.

This patch fixes the issue and adds a test to verify that we don't regress that
particular case.

llvm-svn: 330032

Reviewers: gchatelet

Subscribers: tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D45625

llvm-svn: 330026

Summary: This enables debug fission on implicit ThinLTO when linked with gold. It will put the .dwo files in a directory specified by user. 

Reviewers: tejohnson, pcc, dblaikie

Reviewed By: pcc

Subscribers: JDevlieghere, mehdi_amini, inglorion

Differential Revision: https://reviews.llvm.org/D44792

llvm-svn: 329988

Summary:
llvm-diff incorrectly reports that there's a diff when input IR contains undef/zeroinitializer/constantvector/indirectbr.
(This happens even if two identical files are given, e.g. `llvm-diff x.ll x.ll`)

This is fix to the bug report https://bugs.llvm.org/show_bug.cgi?id=33623 .



Reviewers: dexonsmith, rjmccall

Reviewed By: rjmccall

Subscribers: chenwj, mgrang, llvm-commits

Differential Revision: https://reviews.llvm.org/D34856

llvm-svn: 329957

Differential Revision: https://reviews.llvm.org/D45579

llvm-svn: 329947

llvm-svn: 329895

TableGen seems to work differently on windows. I'll need to revert this

This reverts commit 7a153ddea067b24da59f6a66c733d79205969501.

llvm-svn: 329867

Swithces from using the command line library to using TableGen. This will allow
llvm-strip to exist and allow refinements of the command line syntax.

Differential Revision: https://reviews.llvm.org/D44236

llvm-svn: 329863

These aren't the .def style files used in LLVM that require a macro
defined before their inclusion - they're just basic non-modular includes
to stamp out command line flag variables.

llvm-svn: 329840

[llvm-mca] Let the Scheduler notify dispatch stall events caused by the lack of scheduling resources.

This patch moves part of the logic that notifies dispatch stall events from the
DispatchUnit to the Scheduler.

The main goal of this patch is to remove (yet another) dependency between the
DispatchUnit and the Scheduler. Before this patch, the DispatchUnit had to know
about `Scheduler::Event` and how to classify stalls due to the lack of scheduling
resources. This patch removes that knowledge and simplifies the logic in
DispatchUnit::checkScheduler.

This is another change done in preparation for the work to fix PR36663.

No functional change intended.

llvm-svn: 329835

It caused a buildbot failure (clang-ppc64le-linux-multistage - build #6424)

llvm-svn: 329812

llvm-svn: 329807

llvm-svn: 329796

Also, removed flag -verbose in favor of flag -retire-stats.

llvm-svn: 329794

Added flag -scheduler-stats to print scheduler related statistics.

llvm-svn: 329792

Summary: Fixes PR37053.

Reviewers: uabelho, gchatelet

Subscribers: mgorny, tschuett, llvm-commits

Differential Revision: https://reviews.llvm.org/D45436

llvm-svn: 329781

llvm-svn: 329767

llvm-svn: 329711

[llvm-mca] Move the logic that prints dispatch unit statistics from BackendStatistics to its own view.

This patch moves the logic that collects and analyzes dispatch events to the
DispatchStatistics view.

Added flag -dispatch-stats to print statistics related to the dispatch logic.

llvm-svn: 329708

llvm-svn: 329707

llvm-svn: 329694

This reapplies r329403 with a fix for the floating point rounding issue.

llvm-svn: 329680

Summary:
Subtargets can define the libpfm counter names that can be used to
measure cycles and uops issued on ProcResUnits.
This allows making llvm-exegesis available on more targets.
Fixes PR36984.

Reviewers: gchatelet, RKSimon, andreadb, craig.topper

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45360

llvm-svn: 329675

Differential Revision: https://reviews.llvm.org/D44808

llvm-svn: 329658

reviewer: zturner
llvm-svn: 329646

This change adds support for the LF_PRECOMP and LF_ENDPRECOMP records required
to read/write Microsoft precompiled types .objs.
See https://en.wikipedia.org/wiki/Precompiled_header#Microsoft_Visual_C_and_C++

This also adds handling for the .debug$P section, which is actually a .debug$T
section in disguise, found only in precompiled .objs.

Differential Revision: https://reviews.llvm.org/D45283

llvm-svn: 329613

llvm-svn: 329592

This patch teaches llvm-mca how to parse code comments in search for special
"markers" used to select regions of code.

Example:

# LLVM-MCA-BEGIN My Code Region
  ....
# LLVM-MCA-END

The MCAsmLexer now delegates to an object of class MCACommentParser (i.e. an
AsmCommentConsumer) the parsing of code comments to search for begin/end code
region markers.

A comment starting with substring "LLVM-MCA-BEGIN" marks the beginning of a new
region of code.  A comment starting with substring "LLVM-MCA-END" marks the end
of the last region.

This implementation doesn't allow regions to overlap. Each region can have a
optional description; internally, each region is identified by a range of source
code locations (SMLoc).

MCInst objects are added to a region R only if the source location for the
MCInst is in the range of locations specified by R.

By default, the tool allocates an implicit "Default" code region which contains
every source location.  See new tests llvm-mca-marker-*.s for a few examples.

A new Backend object is created for every region. So, the analysis is conducted
on every parsed code region.  The final report is the union of the reports
generated for every code region.  Note that empty regions are skipped.

Special "[#] Code Region - ..." strings are used in the report to mark the
portion which is specific to a code region only. For example, see
llvm-mca-markers-5.s.

Differential Revision: https://reviews.llvm.org/D45433

llvm-svn: 329590

Summary:
The option is helpful for large projects where it's not feasible to specify sources which
user would like to see in the report. Instead, it allows to black-list specific sources via
regular expressions (e.g. now it's possible to skip all files that have "test" in its name).

This also partially fixes https://bugs.llvm.org/show_bug.cgi?id=34277

Reviewers: vsk, morehouse, liaoyuke

Reviewed By: vsk

Subscribers: kcc, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D43907

llvm-svn: 329581

This made AArch64/CortexA57/direct-branch.s fail on Windows, e.g.
http://lab.llvm.org:8011/builders/clang-x86-windows-msvc2015/builds/11251

> Also, update a few tests to minimize the diff in D45369.
> No functional change intended.

llvm-svn: 329569

llvm-svn: 329554

With the threading refactoring, loading of object files happens before
checking whether we're dealing with a swift AST. While that's not an
issue per se, it causes a warning to be printed:

  warning: /path/to/a.swiftmodule: The file was not recognized as a valid object file
  note: while processing /path/to/a.swiftmodule

This suppresses the warning by checking for a Swift AST before
attempting to load is as an object file.

rdar://39240444

llvm-svn: 329553

Add some additional checks so we don't crash on empty compile units.

llvm-svn: 329537

llvm-svn: 329532

[llvm-exegesis] Fix unused return value warning and add a useful error message for event counter reads.

llvm-svn: 329496

Summary: Move LLVMDIBuilderCreateFunction , LLVMDIBuilderCreateLexicalBlock, and LLVMDIBuilderCreateLexicalBlockFile from Go to LLVM-C.

Reviewers: whitequark, harlanhaskins, deadalnix

Reviewed By: whitequark, harlanhaskins

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45352

llvm-svn: 329488

It was reported that this change measurably regressed -plugin-opt=O3
performance.

There is an ongoing discussion on llvm-dev about the correct way to
set the CG opt level, see thread "[llvm-dev] [RFC] Adding function
attributes to represent codegen optimization level".

llvm-svn: 329458

Also, update a few tests to minimize the diff in D45369.
No functional change intended.

llvm-svn: 329403

Summary:
- Add a missing getter for module-level inline assembly
- Add a missing append function for module-level inline assembly
- Deprecate LLVMSetModuleInlineAsm and replace it with LLVMSetModuleInlineAsm2 which takes an explicit length parameter
- Deprecate LLVMConstInlineAsm and replace it with LLVMGetInlineAsm, a function that allows passing a dialect and is not mis-classified as a constant operation

Reviewers: whitequark, deadalnix

Reviewed By: whitequark

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D45346

llvm-svn: 329369