They were breaking the Windows build when using MSBuild, see the
discussion on D56781.

r351833: "Use response file when generating LLVM-C.dll"

> Use response file when generating LLVM-C.dll
>
> As discovered in D56774 the command line gets to long, so use a response file to give the script the libs. This change has been tested and is confirmed working for me.
>
> Commited on behalf of Jakob Bornecrantz
>
> Differential Revision: https://reviews.llvm.org/D56781

r352250: "Build LLVM-C.dll by default on windows and enable in release package"

>  Build LLVM-C.dll by default on windows and enable in release package
>
>  With the fixes to the building of LLVM-C.dll in D56781 this should now
>  be safe to land. This will greatly simplify dealing with LLVM for people
>  that just want to use the C API on windows. This is a follow up from
>  D35077.
>
>  Patch by Jakob Bornecrantz!
>
>  Differential revision: https://reviews.llvm.org/D56774

llvm-svn: 352492

During the lowering of a switch that would result in the generation of a 
jump table, a range check is performed before indexing into the jump 
table, for the switch value being outside the jump table range and a 
conditional branch is inserted to jump to the default block. In case the 
default block is unreachable, this conditional jump can be omitted. This 
patch implements omitting this conditional branch for unreachable 
defaults.

Review ID: D52002
Reviewers: Hans Wennborg, Eli Freidman, Roman Lebedev

llvm-svn: 352484

llvm-svn: 352480

Re-enable the code to rewrite main-function signatures into
"int main(int argc, char *argv[])", but limited to only handling
the case of "int main(void)", so that it doesn't silently strip
an argument in the "int main(int argc, char *argv[], char *envp[])"
case.

This allows main to be called by C startup code, since WebAssembly
requires caller and callee signatures to match, so it can't rely
on passing main a different number of arguments than it expects.

Differential Revision: https://reviews.llvm.org/D57323

llvm-svn: 352479

The address isn't dynamically relocated. The object is.

llvm-svn: 352477

Differential Revision: https://reviews.llvm.org/D57301

llvm-svn: 352476

This attempts to optimise negative values used in load/store operands
a little. We currently try to selct them as rr, materialising the
negative constant using a MOV/MVN pair. This instead selects ri with
an immediate of 0, forcing the add node to become a simpler sub.

Differential Revision: https://reviews.llvm.org/D57121

llvm-svn: 352475

Adds note requested in D57301 and fixes some missing GOTPCREL addressmath checks

llvm-svn: 352474

llvm-svn: 352472

This test started XPASSing with r352467, and the change in behaviour
performed by that patch does appear to fix the cause of the original XFAIL
(missing FrameIndex DBG_VALUE), which I've replicated locally with
-mtriple=powerpc64--.

I'll write this up in PR21881 which documents the XFAIL, and seek
confirmation I haven't overlooked something here.

llvm-svn: 352471

Summary:
This patch avoids an assert in IPConstantPropagation when
there is a argument count/type mismatch between the caller and
the callee.

While this is actually UB on C-level (clang emits a warning),
the IR verifier seems to accept it. I'm not sure what other
frontends/languages might think about this, so simply bailing out
to avoid hitting an assert (in CallSiteBase<>::getArgOperand or
Value::doRAUW) seems like a simple solution.

The problem is exposed by the fact that AbstractCallSites will look
through a bitcast at the callee position of a call/invoke.

Reviewers: jdoerfert, reames, efriedma

Reviewed By: jdoerfert, efriedma

Subscribers: eli.friedman, efriedma, llvm-commits

Differential Revision: https://reviews.llvm.org/D57052

llvm-svn: 352469

A FrameIndex should be valid throughout a block regardless of what instructions
get selected in that block -- therefore we shouldn't harness dbg.values that
refer to FrameIndexes to an SDNode. There are numerous codegen reasons why
an SDNode never appears or doesn't become a location that a DBG_VALUE can
refer to. None of them actually affect the variable location.

Therefore, before any other tests to encode dbg_values in a SelectionDAG,
identify FrameIndex operands and encode them unattached to any SDNode.

Differential Revision: https://reviews.llvm.org/D57328

llvm-svn: 352467

llvm-svn: 352466

Windows ARM64 has PIC relocation model and uses jump table kind
EK_LabelDifference32. This produces jump table entry as
".word LBB123 - LJTI1_2" which represents the distance between the block
and jump table.

A new relocation type (IMAGE_REL_ARM64_REL32) is needed to do the fixup
correctly if they are in different COFF section.

This change saves the jump table to the same COFF section as the
associated code. An ideal fix could be utilizing IMAGE_REL_ARM64_REL32
relocation type.

Patch by Tom Tan!

Differential Revision: https://reviews.llvm.org/D57277

llvm-svn: 352465

This patch makes sure that a debug value that is after the bitcast in
dupRetToEnableTailCallOpts() is also skipped.

The reduced test case is from SPEC-2006 on SystemZ.

Review: Vedant Kumar, Wolfgang Pieb
https://reviews.llvm.org/D57050

llvm-svn: 352462

This should have had a target triple in it, my mistake.

llvm-svn: 352460

Without the fix we get the following (with -Werror):

../lib/Target/X86/X86ISelLowering.cpp:14181:58: error: suggest braces around initialization of subobject [-Werror,-Wmissing-braces]
  SmallVector<std::array<int, 2>, 2> LaneSrcs(NumLanes, {-1, -1});
                                                         ^~~~~~
                                                         {     }
1 error generated.

llvm-svn: 352455

I had a local change I hadn't realized when submitting that auto-update.  As such, the auto-update was wrong.  This should fix it, and with that, it's clearly time to stop submitting changes and go to bed.

llvm-svn: 352454

This file appears to have been manually editted at some point after being auto-updated. A future change adjusts this file slightly, and all of the updates makes the diff super confusing.

llvm-svn: 352453

[Test] Add tests for gather/maked.load demanded elements, and convert the whole file to auto generated checks.

llvm-svn: 352452

The code of AddRec simplification is using wrong loop when it creates a new
AddRecExpr. It should be using AddRecLoop which we have saved and against which
all gate checks are made, and not calling AddRec->getLoop() over and over
again because AddRec may change and become an AddRecurrency from outer loop
during the transform iterations.

Considering this change trivial, commiting for postcommit review.

llvm-svn: 352451

llvm-svn: 352450

New test added in r352441 getting a bot failure which I believe is
due to different ordering in the dumping which isn't being handled
well. Try to make test more resilient to ordering differences.

llvm-svn: 352446

Previously we were only handling bitcast operations, however
prototypeless functions can also appear in other places such as
comparisons and as function params.

Switch to using replaceAllUsesWith() to replace the prototype-less
function uses.  This new approach results in some redundant bitcasting
but is much simpler and handles all cases.

Differential Revision: https://reviews.llvm.org/D56938

llvm-svn: 352445

Move the CC analysis implementation to its own .cpp file instead of
duplicating it and artificually using functions in PPCISelLowering.cpp
and PPCFastISel.cpp. Follow-up to the same change done for X86, ARM, and
AArch64.

llvm-svn: 352444

Reviewers: aheejin

Subscribers: dschuff, sbc100, jgravelle-google, hiraditya, sunfish

Differential Revision: https://reviews.llvm.org/D57276

llvm-svn: 352442

Summary:
I found that there currently isn't a way to invoke exportToDot from
the command line for a per-module summary index, and therefore no
testing of that case. Add an internal option and use it to test dumping
of per module summary indexes.

In particular, I am looking at fixing the limitation that causes the
aliasee GUID in the per-module summary to be 0, and want to be able to
test that change.

Reviewers: evgeny777

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

Differential Revision: https://reviews.llvm.org/D57206

llvm-svn: 352441

GEPs can produce either scalar or vector results. If we're extracting only a subset of the vector lanes, simplifying the operands is helpful in eliminating redundant computation, and (eventually) allowing further optimizations

Differential Revision: https://reviews.llvm.org/D57177

llvm-svn: 352440

llvm-svn: 352439

Summary:
A recent fix to the ThinLTO whole program dead code elimination (D56117)
increased the thin link time on a large MSAN'ed binary by 2x.
It's likely that the time increased elsewhere, but was more noticeable
here since it was already large and ended up timing out.

That change made it so we would repeatedly scan all copies of linkonce
symbols for liveness every time they were encountered during the graph
traversal. This was needed since we only mark one copy of an aliasee as
live when we encounter a live alias. This patch fixes the issue in a
more efficient manner by simply proactively visiting the aliasee (thus
marking all copies live) when we encounter a live alias.

Two notes: One, this requires a hash table lookup (finding the aliasee
summary in the index based on aliasee GUID). However, the impact of this
seems to be small compared to the original pre-D56117 thin link time. It
could be addressed if we keep the aliasee ValueInfo in the alias summary
instead of the aliasee GUID, which I am exploring in a separate patch.

Second, we only populate the aliasee GUID field when reading summaries
from bitcode (whether we are reading individual summaries and merging on
the fly to form the compiled index, or reading in a serialized combined
index). Thankfully, that's currently the only way we can get to this
code as we don't yet support reading summaries from LLVM assembly
directly into a tool that performs the thin link (they must be converted
to bitcode first). I added a FIXME, however I have the fix under test
already. The easiest fix is to simply populate this field always, which
isn't hard, but more likely the change I am exploring to store the
ValueInfo instead as described above will subsume this. I don't want to
hold up the regression fix for this though.

Reviewers: trentxintong

Subscribers: mehdi_amini, inglorion, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D57203

llvm-svn: 352438

llvm-svn: 352437

Recommit r352255 "[SelectionDAG][X86] Don't use SEXTLOAD for promoting masked loads in the type legalizer"

This did not cause the buildbot failure it was previously reverted for.

Original commit message:

I'm not sure why we were using SEXTLOAD. EXTLOAD seems more appropriate since we don't care about the upper bits.

This patch changes this and then modifies the X86 post legalization combine to emit a extending shuffle instead of a sign_extend_vector_inreg. Could maybe use an any_extend_vector_inre

On AVX512 targets I think we might be able to use a masked vpmovzx and not have to expand this at all.

llvm-svn: 352433

This patch tried to address the following use case.
  . bcc (https://github.com/iovisor/bcc

) utilizes llvm JIT to
    compile for BTF target.
  . with -g, .BTF and .BTF.ext sections (BPF debug info)
    will be generated by LLVM.
  . .BTF does not have relocations and .BTF.ext has some
    relocations.
  . With ProcessAllSections, .BTF.ext is loaded by JIT dynamic linker
    and is available to application. But .BTF is not loaded.

The bcc application needs both .BTF.ext and .BTF for debugging
purpose, and .BTF is not loaded. This patch addressed this issue
by iterating over all sections and loading any missing
sections, after symbol/relocation processing in loadObjectImpl().

Signed-off-by: Yonghong Song <yhs@fb.com>

Differential Revision: https://reviews.llvm.org/D55943

llvm-svn: 352432

Create ARMCallingConv.cpp and emit code for calling convention analysis
from there.

llvm-svn: 352431

Summary:
Avoids duplicating generated static helpers for calling convention
analysis.

This also means you can modify AArch64CallingConv.td without recompiling
the AArch64ISelLowering.cpp monolith, so it provides faster incremental
rebuilds.

Saves 12K in llc.exe, but adds a new object file, which is large.

Reviewers: efriedma, t.p.northover

Subscribers: mgorny, javed.absar, kristof.beyls, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D56948

llvm-svn: 352430

This adds support for legalizing G_FLOG into a RTLib call.

It adds a legalizer test, and updates the existing floating point tests.

https://reviews.llvm.org/D57347

llvm-svn: 352429

I forgot that our undef matching hasn't been completed in the previous commit.

llvm-svn: 352424

llvm-svn: 352423

Since these pass the pointer in m0 unlike other DS instructions, these
need to worry about whether the address is uniform or not. This
assumes the address is dynamically uniform, and just uses
readfirstlane to get a copy into an SGPR.

I don't know if these have the same 16-bit add for the addressing mode
offset problem on SI or not, but I've just assumed they do.

Also includes some misc. changes to avoid test differences between the
LDS and GDS versions.

llvm-svn: 352422

gn build: Add get.py script to download prebuilt gn, make gn.py run downloaded gn if gn is not on PATH

Prebuilts are available for x86_64 Linux, macOS, Windows. The script always
pulls the latest GN version.

Differential Revision: https://reviews.llvm.org/D57256

llvm-svn: 352420