This patch gives elfabi the ability to read DT_NEEDED entries from ELF binaries
to populate NeededLibs in TextAPI's ELFStub.

Differential Revision: https://reviews.llvm.org/D55852

llvm-svn: 351592

llvm-svn: 351591

The existing tests already show a sub-optimal transform,
but this should make it clear that we can't just match
an 'and' op when creating movmsk instructions.

llvm-svn: 351590

To see if this helps flaky bot failures in PR40351.

llvm-svn: 351589

llvm-svn: 351584

Make sure CodeGenPrepare doesn't emit multiple inttoptr instructions of
the same integer value while sinking address computations, but rather
CSEs them on the fly: excessive inttoptr's confuse SCEV into thinking
that related pointers have nothing to do with each other.

This problem blocks LoadStoreVectorizer from vectorizing some of the
loads / stores in a downstream target.

Reviewed By: hfinkel

Differential Revision: https://reviews.llvm.org/D56838

llvm-svn: 351582

[X86] Lower avx2/avx512f gather intrinsics to X86MaskedGatherSDNode instead of going directly to MachineSDNode.:

This sends these intrinsics through isel in a much more normal way. This should allow addressing mode matching in isel to make better use of the displacement field.

Differential Revision: https://reviews.llvm.org/D56827

llvm-svn: 351570

This commit adds some missing intrinsics into the isAlwaysUniform list
for the AMDGPU backend.

Differential Revision: https://reviews.llvm.org/D56845

llvm-svn: 351562

Set the test to properly require aarch64 instead of arm. Otherwise, this test fails with LLVM_TARGETS_TO_BUILD='ARM;X86'

bin/llvm-mc: : error: unable to get target for 'arm64-apple-ios7.0.0'

Committed on behalf of @easyaspi314 (Devin)

Differential Revision: https://reviews.llvm.org/D56472

llvm-svn: 351560

See bug 39332: https://bugs.llvm.org/show_bug.cgi?id=39332

Reviewers: artem.tamazov, arsenm

Differential Revision: https://reviews.llvm.org/D56794

llvm-svn: 351555

See bug 39319: https://bugs.llvm.org/show_bug.cgi?id=39319

Reviewers: artem.tamazov, arsenm, rampitec

Differential Revision: https://reviews.llvm.org/D56847

llvm-svn: 351549

When -all-headers is given it is supposed to dump all headers,
but now it skips the archive headers for no reason.

The patch fixes that.

Differential revision: https://reviews.llvm.org/D56780

llvm-svn: 351547

Prior to this patch, the AVR::LDWRdPtr instruction was always lowered to
instructions of this pattern:

    ld  $GPR8, [PTR:XYZ]+
    ld  $GPR8, [PTR]+1

This has a problem; the [PTR] is incremented in-place once, but never
decremented.

Future uses of the same pointer will use the now clobbered value,
leading to the pointer being incorrect by an offset of one.

This patch modifies the expansion code of the LDWRdPtr pseudo
instruction so that the pointer variable is not silently clobbered in
future uses in the same live range.

Patch by Keshav Kini.

llvm-svn: 351544

Now that the CBR alias has lower priority than ANDI, the assembly
printer uses ANDI instead.

Original broken in r351526.

llvm-svn: 351539

We should not pre-scheduled the node has ADJCALLSTACKDOWN parent,
or else, when bottom-up scheduling, ADJCALLSTACKDOWN and
ADJCALLSTACKUP may hold CallResource too long and make other
calls can't be scheduled. If there's no other available node
to schedule, the scheduler will try to rename the register by
creating copy to avoid the conflict which will fail because
CallResource is not a real physical register.

llvm-svn: 351527

Remove DBG_LABELs in LiveDebugVariables and generate them in
VirtRegRewriter.

This bug is reported in
https://bugs.chromium.org/p/chromium/issues/detail?id=898152.

Differential Revision: https://reviews.llvm.org/D54465

llvm-svn: 351525

This change modifies the LLVM ISel lowering settings so that
8-bit/16-bit multiplication is expanded to calls into the compiler
runtime library if the MCU being targeted does not support
multiplication in hardware.

Before this, MUL instructions would be generated on CPUs like the
ATtiny85, triggering a CPU reset due to an illegal instruction at
runtime.

First raised in https://github.com/avr-rust/rust/issues/124.

llvm-svn: 351523

[X86] Add test cases showing failure to fold a global variable address into the gather addressing mode when using the target specific intrinsics. NFC

llvm-svn: 351522

[X86] Change avx512-gather-scatter-intrin.ll to use x86_64-unknown-unknown instead of x86_64-apple-darwin. NFC

Will help with an upcoming patch.

llvm-svn: 351521

llvm/tools sets LLVM_TOOL_LTO_BUILD to Off if LLVM_ENABLE_PIC=OFF, but that's
not visible in llvm/test.

r289662 added the llvm_tool_lto_build lit parameter, there the intent was to
use it with an explicit -DLLVM_TOOL_LTO_BUILD=OFF, which is visible globally.
On the review for that (D27739), a mild preference was expressed for using a
lit parameter over checking the existence of libLTO.dylib. Since that works
with the LLVM_ENABLE_PIC=OFF case too and since it matches what we do for the
gold plugin, switch to that approach.

Differential Revision: https://reviews.llvm.org/D56805

llvm-svn: 351515

Reviewers: aheejin, dschuff, sbc100

Subscribers: aprantl, jgravelle-google, hiraditya, sunfish

Differential Revision: https://reviews.llvm.org/D56889

llvm-svn: 351507

llvm-svn: 351494

Prior to r348205, extracting code regions with live output values was
disabled because of a miscompilation (PR39433). Lift the restriction as
PR39433 has been addressed.

Tested on LNT+externals, on a run of check-llvm in a stage2 build, and
with a full build of iOS (with hot/cold splitting enabled).

As a drive-by, remove an errant TODO.

llvm-svn: 351492

Resuming exception unwinding is roughly as unlikely as throwing an
exception.

Tested on LNT+externals (in particular, the C++ EH regression tests
provide end-to-end test coverage), as well as with a full build of iOS.

llvm-svn: 351491

The callee address is added as an optional operand (MCSymbol) in
AdjustInstrPostInstrSelection() and then used by asm printer to insert:
'.reloc tmplabel, R_MIPS_JALR, symbol
tmplabel:'.
Controlled with '-mips-jalr-reloc', default is true.

Differential revision: https://reviews.llvm.org/D56694

llvm-svn: 351485

Relaxing this requirement creates opportunities to split code dominated
by an EH pad.

Tested on LNT+externals.

llvm-svn: 351483

This gets rid of the brittle/mysterious calls to @sink()/@sideeffect()
peppered throughout the test cases. They are no longer needed to force
splitting to occur.

llvm-svn: 351480

If the sample profile has no inlining hierachy information included, we call
the sample profile is flattened. For flattened profile, in ThinLTO postlink
phase, SampleProfileLoader's hot function inlining and profile annotation will
do nothing, so it is better to save the effort to read in the profile and run
the sample profile loader pass. It is helpful for reducing compile time when
the flattened profile is huge.

Differential Revision: https://reviews.llvm.org/D54819

llvm-svn: 351476

Summary:
InstCombine's sinking algorithm only thinks about memory. It doesn't
think about non-memory constraints like stack object lifetime. It can
sink dynamic allocas across a stacksave call, which may be used with
stackrestore, which can incorrectly reduce the lifetime of the dynamic
alloca.

Fixes PR40365

Reviewers: hfinkel, efriedma

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D56872

llvm-svn: 351475

EXPENSIVE_CHECKS buildbots are failing due to r351404.

Add x1 as live in to the funclet basic block for SEH funclets, as well as
-verify-machineinstrs to the test case that triggered the failure.

llvm-svn: 351472

llvm-svn: 351465

The `llc` invocation was missing `-start-before=machine-cp`.

llvm-svn: 351464

Summary:
objdump was interpreting the function header containing the locals
declaration as instructions. To parse these without injecting target
specific code in objdump, MCDisassembler::onSymbolStart was added to
be implemented by the WebAssembly implemention.

WasmObjectFile now returns a code offset for the "address" of a symbol,
rather than the index. This is also more in-line with what other
targets do.

Also ensured that the AsmParser correctly puts each function
in its own segment to enable this test case.

Reviewers: sbc100, dschuff

Subscribers: jgravelle-google, aheejin, sunfish, rupprecht, llvm-commits

Differential Revision: https://reviews.llvm.org/D56684

llvm-svn: 351460

Mistaken commit of something still under review!

This reverts commit r351453.

llvm-svn: 351455

To help diagnose flaky bot failures in PR40351.

llvm-svn: 351454

Summary:
If LTOUnit splitting is disabled, the module summary analysis computes
the summary information necessary to perform single implementation
devirtualization during the thin link with the index and no IR. The
information collected from the regular LTO IR in the current hybrid WPD
algorithm is summarized, including:
1) For vtable definitions, record the function pointers and their offset
within the vtable initializer (subsumes the information collected from
IR by tryFindVirtualCallTargets).
2) A record for each type metadata summarizing the vtable definitions
decorated with that metadata (subsumes the TypeIdentiferMap collected
from IR).

Also added are the necessary bitcode records, and the corresponding
assembly support.

The index-based WPD will be sent as a follow-on.

Depends on D53890.

Reviewers: pcc

Subscribers: mehdi_amini, Prazek, inglorion, eraman, steven_wu, dexonsmith, arphaman, llvm-commits

Differential Revision: https://reviews.llvm.org/D54815

llvm-svn: 351453

This change adds demangling support to the ELF side of llvm-readobj,
under the switch --demangle/-C.

The following places are demangled: symbol table dumps (static and
dynamic), relocation dumps (static and dynamic), addrsig dumps, call
graph profile dumps, and group section signature symbols.

Although GNU readelf doesn't support demangling, it is still a useful
feature to have, and brings it on a par with llvm-objdump's
capabilities.

This fixes https://bugs.llvm.org/show_bug.cgi?id=40054.

Reviewed by: grimar, rupprecht

Differential Revision: https://reviews.llvm.org/D56791

llvm-svn: 351450

During the transforms in LoopSimplifyCFG, when we remove a dead exiting edge, the
parent loop may stop being reachable from the child loop, and therefore they become
siblings. If the former child loop had uses of some values from its former parent loop,
now such uses will require LCSSA Phis, even if they weren't needed before. So we must
form LCSSA for all loops that stopped being ancestors of the current loop in this case.

Differential Revision: https://reviews.llvm.org/D56144
Reviewed By: fedor.sergeev

llvm-svn: 351434

Function `DeleteDeadBlock` requires that all predecessors of a block
being deleted have already been deleted, with the exception of a
single-block loop. When we use it for removal of dead subloops that
contain more than one block, we may not fulfull this requirement and
fail an assertion.

This patch replaces invocation of `DeleteDeadBlock` with a generalized
version `DeleteDeadBlocks` that is able to deal with multiple dead blocks,
even if they contain some cycles.

Differential Revision: https://reviews.llvm.org/D56121
Reviewed By: fedor.sergeev

llvm-svn: 351433

llvm-svn: 351430