platform/upstream/llvm.git
4 years ago[clangd] Reland LSP latency test
Kadir Cetinkaya [Sun, 3 May 2020 19:06:51 +0000 (21:06 +0200)]
[clangd] Reland LSP latency test

4 years ago[Attributor] Bitcast constant to the returned value type if it has different type
Sergey Dmitriev [Sun, 3 May 2020 18:28:53 +0000 (11:28 -0700)]
[Attributor] Bitcast constant to the returned value type if it has different type

Reviewers: jdoerfert, sstefan1, uenoku

Reviewed By: jdoerfert

Subscribers: hiraditya, uenoku, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79277

4 years agoRevert "[InstSimplify] Remove known bits constant folding"
Nikita Popov [Sun, 3 May 2020 18:45:10 +0000 (20:45 +0200)]
Revert "[InstSimplify] Remove known bits constant folding"

This reverts commit 08556afc54e7ddfa7cc2fdd69c615ad417722517.

This breaks some AMDGPU tests.

4 years ago[InstSimplify] Remove known bits constant folding
Nikita Popov [Fri, 20 Mar 2020 10:57:20 +0000 (11:57 +0100)]
[InstSimplify] Remove known bits constant folding

If SimplifyInstruction() does not succeed in simplifying the
instruction, it will compute the known bits of the instruction
in the hope that all bits are known and the instruction can be
folded to a constant. I have removed a similar optimization
from InstCombine in D75801, and would like to drop this one as well.

On average, we spend ~1% of total compile-time performing this
known bits calculation. However, if we introduce some additional
statistics for known bits computations and how many of them succeed
in simplifying the instruction we get (on test-suite):

    instsimplify.NumKnownBits: 216
    instsimplify.NumKnownBitsComputed: 13828375
    valuetracking.NumKnownBitsComputed: 45860806

Out of ~14M known bits calculations (accounting for approximately
one third of all known bits calculations), only 0.0015% succeed in
producing a constant. Those cases where we do succeed to compute
all known bits will get folded by other passes like InstCombine
later. On test-suite, only lencod.test and GCC-C-execute-pr44858.test
show a hash difference after this change. On lencod we see an
improvement (a loop phi is optimized away), on the GCC torture
test a regression (a function return value is determined only
after IPSCCP, preventing propagation from a noinline function.)

There are various regressions in InstSimplify tests. However, all
of these cases are already handled by InstCombine, and corresponding
tests have already been added there.

Differential Revision: https://reviews.llvm.org/D79294

4 years ago[libc++][test] Use a non-narrowing conversion in assign_pair.pass.cpp
Casey Carter [Sun, 3 May 2020 17:59:10 +0000 (10:59 -0700)]
[libc++][test] Use a non-narrowing conversion in assign_pair.pass.cpp

...to avoid warnings, e.g., from MSVC.

4 years ago[ICP] Handling must tail calls in indirect call promotion
Hongtao Yu [Fri, 1 May 2020 19:44:46 +0000 (12:44 -0700)]
[ICP] Handling must tail calls in indirect call promotion

Per the IR convention, a musttail call must precede a ret with an optional bitcast. This was violated by the indirect call promotion optimization which could result an IR like:

    ; <label>:2192:
      br i1 %2198, label %2199, label %2201, !dbg !226012, !prof !229483

    ; <label>:2199:                                   ; preds = %2192
      musttail call fastcc void @foo(i8* %2195), !dbg !226012
      br label %2202, !dbg !226012

    ; <label>:2201:                                   ; preds = %2192
      musttail call fastcc void %2197(i8* %2195), !dbg !226012
      br label %2202, !dbg !226012

    ; <label>:2202:                                   ; preds = %605, %2201, %2199
      ret void, !dbg !229485

This is being fixed in this change where the return statement goes together with the promoted indirect call. The code generated is like:

    ; <label>:2192:
      br i1 %2198, label %2199, label %2201, !dbg !226012, !prof !229483

    ; <label>:2199:                                   ; preds = %2192
      musttail call fastcc void @foo(i8* %2195), !dbg !226012
      ret void, !dbg !229485

    ; <label>:2201:                                   ; preds = %2192
      musttail call fastcc void %2197(i8* %2195), !dbg !226012
      ret void, !dbg !229485

Differential Revision: https://reviews.llvm.org/D79258

4 years ago[llvm][NFC] Inliner: factor cost and reporting out of inlining process
Mircea Trofin [Fri, 1 May 2020 20:27:43 +0000 (13:27 -0700)]
[llvm][NFC] Inliner: factor cost and reporting out of inlining process

Summary:
This factors cost and reporting out of the inlining workflow, thus
making it easier to reuse when driving inlining from the upcoming
InliningAdvisor.

Depends on: D79215

Reviewers: davidxl, echristo

Subscribers: eraman, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79275

4 years ago[VPlan] Remove unused & undefined print method (NFC).
Florian Hahn [Sun, 26 Apr 2020 16:52:49 +0000 (17:52 +0100)]
[VPlan] Remove unused & undefined print method (NFC).

4 years ago[Attributor][NFC] Encode IRPositions in the bits of a single pointer
Johannes Doerfert [Fri, 17 Apr 2020 23:03:04 +0000 (18:03 -0500)]
[Attributor][NFC] Encode IRPositions in the bits of a single pointer

This reduces memory consumption for IRPositions by eliminating the
vtable pointer and the `KindOrArgNo` integer. Since each abstract
attribute has an associated IRPosition, the 12-16 bytes we save add up
quickly.

No functional change is intended.

---

Single run of the Attributor module and then CGSCC pass (oldPM)
for SPASS/clause.c (~10k LLVM-IR loc):

Before:
```
calls to allocation functions: 469545 (260135/s)
temporary memory allocations: 77137 (42735/s)
peak heap memory consumption: 30.50MB
peak RSS (including heaptrack overhead): 119.50MB
total memory leaked: 269.07KB
```

After:
```
calls to allocation functions: 468999 (274108/s)
temporary memory allocations: 77002 (45004/s)
peak heap memory consumption: 28.83MB
peak RSS (including heaptrack overhead): 118.05MB
total memory leaked: 269.07KB
```

Difference:
```
calls to allocation functions: -546 (5808/s)
temporary memory allocations: -135 (1436/s)
peak heap memory consumption: -1.67MB
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B
```

---

CTMark 15 runs

Metric: compile_time

Program                                        lhs    rhs    diff
 test-suite...:: CTMark/sqlite3/sqlite3.test    25.07  24.09 -3.9%
 test-suite...Mark/mafft/pairlocalalign.test    14.58  14.14 -3.0%
 test-suite...-typeset/consumer-typeset.test    21.78  21.58 -0.9%
 test-suite :: CTMark/SPASS/SPASS.test          21.95  22.03  0.4%
 test-suite :: CTMark/lencod/lencod.test        25.43  25.50  0.3%
 test-suite...ark/tramp3d-v4/tramp3d-v4.test    23.88  23.83 -0.2%
 test-suite...TMark/7zip/7zip-benchmark.test    60.24  60.11 -0.2%
 test-suite :: CTMark/kimwitu++/kc.test         15.69  15.69 -0.0%
 test-suite...:: CTMark/ClamAV/clamscan.test    25.43  25.42 -0.0%
 test-suite :: CTMark/Bullet/bullet.test        37.63  37.62 -0.0%
 Geomean difference                                          -0.8%

---

Reviewed By: lebedev.ri

Differential Revision: https://reviews.llvm.org/D78722

4 years ago[Attributor][NFC] Let AbstractAttribute be an IRPosition
Johannes Doerfert [Thu, 23 Apr 2020 03:03:44 +0000 (22:03 -0500)]
[Attributor][NFC] Let AbstractAttribute be an IRPosition

Since every AbstractAttribute so far, and for the foreseeable future,
corresponds to a single IRPosition we can simplify the class structure.
We already did this for IRAttribute but there is no reason to stop
there.

4 years agoRevert "Optimize path::remove_dots"
Nico Weber [Sun, 3 May 2020 16:46:46 +0000 (12:46 -0400)]
Revert "Optimize path::remove_dots"

This reverts commit 53913a65b408ade2956061b4c0aaed6bba907403.
Breaks VFSFromYAMLTest.DirectoryIterationSameDirMultipleEntries
in SupportTests on non-Windows.

4 years ago[X86] Add tests showing failure to fold mul(abs(x),abs(x)) -> mul(x,x) (PR39476)
Simon Pilgrim [Sun, 3 May 2020 16:38:57 +0000 (17:38 +0100)]
[X86] Add tests showing failure to fold mul(abs(x),abs(x)) -> mul(x,x) (PR39476)

4 years ago[llvm][NFC] Inliner.cpp shouldInline post-commit feedback
Mircea Trofin [Sun, 3 May 2020 16:28:28 +0000 (09:28 -0700)]
[llvm][NFC] Inliner.cpp shouldInline post-commit feedback

Discussion is in https://reviews.llvm.org/D79215

4 years ago[clangd] Change include to be relative to current directory
Kadir Cetinkaya [Sun, 3 May 2020 16:09:40 +0000 (18:09 +0200)]
[clangd] Change include to be relative to current directory

4 years agoOptimize path::remove_dots
Reid Kleckner [Sun, 3 May 2020 13:26:12 +0000 (06:26 -0700)]
Optimize path::remove_dots

LLD calls this on every source file string in every object file when
writing PDBs, so it is somewhat hot.

Avoid rewriting paths that do not contain path traversal components
(./..). Use find_first_not_of(separators) directly instead of using the
path iterators. The path component iterators appear to be slow, and
directly searching for slashes makes it easier to find double separators
that need to be canonicalized.

I discovered that the VFS relies on remote_dots to not canonicalize
early slashes (/foo or C:/foo) on Windows, so I had to leave that
behavior behind with unit tests for it. This is undesirable, but I claim
that my change is NFC.

4 years ago[COFF] Paritally inline Symbol::getName, NFC
Reid Kleckner [Sun, 3 May 2020 02:53:49 +0000 (19:53 -0700)]
[COFF] Paritally inline Symbol::getName, NFC

4 years ago[InstCombine] use select-of-constants with set/clear bit mask patterns
Sanjay Patel [Sun, 3 May 2020 13:43:49 +0000 (09:43 -0400)]
[InstCombine] use select-of-constants with set/clear bit mask patterns

Cond ? (X & ~C) : (X | C) --> (X & ~C) | (Cond ? 0 : C)
Cond ? (X | C) : (X & ~C) --> (X & ~C) | (Cond ? C : 0)

The select-of-constants form results in better codegen.
There's an existing test diff that shows a transform that
results in an extra IR instruction, but that's an existing
problem.

This is motivated by code seen in LLVM itself - see PR37581:
https://bugs.llvm.org/show_bug.cgi?id=37581

define i8 @src(i8 %x, i8 %C, i1 %b)  {
  %notC = xor i8 %C, -1
  %and = and i8 %x, %notC
  %or = or i8 %x, %C
  %cond = select i1 %b, i8 %or, i8 %and
  ret i8 %cond
}

define i8 @tgt(i8 %x, i8 %C, i1 %b)  {
  %notC = xor i8 %C, -1
  %and = and i8 %x, %notC
  %mul = select i1 %b, i8 %C, i8 0
  %or = or i8 %mul, %and
  ret i8 %or
}

http://volta.cs.utah.edu:8080/z/Vt2WVm

Differential Revision: https://reviews.llvm.org/D78880

4 years ago[clangd] Drop duplicate header
Kadir Cetinkaya [Sun, 3 May 2020 13:20:20 +0000 (15:20 +0200)]
[clangd] Drop duplicate header

4 years ago[Support] Don't initialize buffer allocated by zlib::uncompress
Benjamin Kramer [Sun, 3 May 2020 12:52:19 +0000 (14:52 +0200)]
[Support] Don't initialize buffer allocated by zlib::uncompress

This is a somewhat annoying API, but not without precedend in this low
level API.

4 years ago[X86] Use splitVector helper in truncateVectorWithPACK/splitVectorStore/combineHorizo...
Simon Pilgrim [Sun, 3 May 2020 12:23:46 +0000 (13:23 +0100)]
[X86] Use splitVector helper in truncateVectorWithPACK/splitVectorStore/combineHorizontalMinMaxResult/combineReductionToHorizontal. NFC.

All these locations were performing the same type splitting/extractSubVector calls as the spltVector helper.

4 years ago[gn build] Port e64f99c51a8
LLVM GN Syncbot [Sun, 3 May 2020 12:08:26 +0000 (12:08 +0000)]
[gn build] Port e64f99c51a8

4 years ago[gn build] (manually) port ad97ccf6b26a more, for include added in e64f99c51a8
Nico Weber [Sun, 3 May 2020 12:07:52 +0000 (08:07 -0400)]
[gn build] (manually) port ad97ccf6b26a more, for include added in e64f99c51a8

4 years ago[X86] Don't limit splitVector helper to simple types.
Simon Pilgrim [Sun, 3 May 2020 11:27:14 +0000 (12:27 +0100)]
[X86] Don't limit splitVector helper to simple types.

It can handle EVT just as well (and so can the extractSubVector calls).

4 years ago[Debuginfo][NFC] Avoid double calling of DWARFDie::find(DW_AT_name).
Alexey Lapshin [Thu, 30 Apr 2020 11:05:17 +0000 (14:05 +0300)]
[Debuginfo][NFC] Avoid double calling of DWARFDie::find(DW_AT_name).

Summary:
Current implementation of DWARFDie::getName(DINameKind Kind) could
lead to double call to DWARFDie::find(DW_AT_name) in following
scenario:

getName(LinkageName);
getName(ShortName);

getName(LinkageName) calls find(DW_AT_name) if linkage name is not
found. Then, it is called again in getName(ShortName). This patch
alows to request LinkageName and ShortName separately
to avoid extra call to find(DW_AT_name).

It helps D74169 to parse clang debuginfo faster(~1%).

Reviewers: clayborg, dblaikie

Differential Revision: https://reviews.llvm.org/D79173

4 years ago[InstCombine] Duplicate some InstSimplify tests (NFC)
Nikita Popov [Sun, 3 May 2020 10:42:00 +0000 (12:42 +0200)]
[InstCombine] Duplicate some InstSimplify tests (NFC)

Duplicate some tests in preparation for D79294.

4 years ago[X86][SSE] splitAndLowerShuffle - use splitVector helper. NFC.
Simon Pilgrim [Sun, 3 May 2020 09:48:28 +0000 (10:48 +0100)]
[X86][SSE] splitAndLowerShuffle - use splitVector helper. NFC.

The splitVector helper uses extractSubVector which splits build vectors like we do here, so avoid reimplementing it.

splitVector could easily be extended to peek through bitcasts as well but I'd prefer to keep this commit NFC.

4 years ago[X86] detectAVGPattern - use matchUnaryPredicate helper. NFC.
Simon Pilgrim [Sun, 3 May 2020 08:54:54 +0000 (09:54 +0100)]
[X86] detectAVGPattern - use matchUnaryPredicate helper. NFC.

Use the ISD::matchUnaryPredicate helper to check for inrange constants.

4 years ago[ValueTracking] Convert test to unit test (NFC)
Nikita Popov [Sun, 3 May 2020 10:21:50 +0000 (12:21 +0200)]
[ValueTracking] Convert test to unit test (NFC)

Test this directly, rather than going through InstSimplify.

4 years ago[clangd] Fix name hiding in TestTracer and disable racy test for now
Kadir Cetinkaya [Sun, 3 May 2020 09:44:52 +0000 (11:44 +0200)]
[clangd] Fix name hiding in TestTracer and disable racy test for now

4 years ago[clangd] Metric tracking through Tracer
Kadir Cetinkaya [Thu, 16 Apr 2020 21:12:09 +0000 (23:12 +0200)]
[clangd] Metric tracking through Tracer

Summary: Introduces an endpoint to Tracer for tracking metrics on
internal events.

Reviewers: sammccall

Subscribers: ilya-biryukov, javed.absar, MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78429

4 years agoTest Commit: add two head comments in WinEHPrepare.cpp
Ten Tzen [Sun, 3 May 2020 08:15:59 +0000 (01:15 -0700)]
Test Commit: add two head comments in WinEHPrepare.cpp

This is a Test commit.

4 years agoRe-land "[PDB] Avoid calling discoverTypeIndices for a known record kind"
Reid Kleckner [Sun, 3 May 2020 01:33:27 +0000 (18:33 -0700)]
Re-land "[PDB] Avoid calling discoverTypeIndices for a known record kind"

Fixed bad usage of slice API causing assertion failures.

Reverts 810c8e9b495c191f49b162cee3fb8829185a2691
Reinstates bd7ea8641e7667b109534ae06b33be7bc9b59821

4 years ago[PDB] Bypass generic deserialization code for publics sorting
Reid Kleckner [Sun, 3 May 2020 01:06:41 +0000 (18:06 -0700)]
[PDB] Bypass generic deserialization code for publics sorting

The number of public symbols is very large, and each deserialization
does a few heap allocations. The public symbols are serialized by the
linker, so we can assume they have the expected layout and use it
directly.

Saves O(#publics) temporary heap allocations and shrinks some data
structures.

4 years agoRevert "[PDB] Avoid calling discoverTypeIndices for a known record kind"
Nico Weber [Sun, 3 May 2020 01:06:06 +0000 (21:06 -0400)]
Revert "[PDB] Avoid calling discoverTypeIndices for a known record kind"

This reverts commit bd7ea8641e7667b109534ae06b33be7bc9b59821.
Breaks check-lld everywhere.

4 years ago[X86] Fix a few issues in the evex-to-vex-compress.mir test.
Craig Topper [Sat, 2 May 2020 23:33:48 +0000 (16:33 -0700)]
[X86] Fix a few issues in the evex-to-vex-compress.mir test.

Don't use $noreg for instructions that take register inputs.
Only allow $noreg for parts of memory operands.

Don't use index register with $rip base.

Use RETQ instead of the RET pseudo. This pass is after the
ExpandPseudo pass that converts RET to RETQ.

4 years ago[PDB] Remove a couple asserts that are no longer valid now that C13Builders does...
Craig Topper [Sun, 3 May 2020 00:28:58 +0000 (17:28 -0700)]
[PDB] Remove a couple asserts that are no longer valid now that C13Builders does not use unique_ptr.

These asserts used to check that unique_ptr was not null.

This fixes failures from 7af4bb16417deeb1d01e7dbbbb2272f1f46753c6

4 years ago[PDB] Remove unique_ptr wrapper around C13 line table subsections
Reid Kleckner [Sat, 2 May 2020 23:31:43 +0000 (16:31 -0700)]
[PDB] Remove unique_ptr wrapper around C13 line table subsections

This accounts for a large portion of the memory allocations in LLD.
This DebugSubsectionRecordBuilder object can be stored directly in
C13Builders, it mostly wraps other subsections.

Remove the container kind field from the object. It is always the same
for all elements in the vector, and we can pass it in during writing.

4 years ago[PDB] Avoid calling discoverTypeIndices for a known record kind
Reid Kleckner [Sat, 2 May 2020 22:48:31 +0000 (15:48 -0700)]
[PDB] Avoid calling discoverTypeIndices for a known record kind

This particular overload allocates memory, and we do this for every
S_[GL]PROC32_ID record. Instead, hardcode the offset of the typeindex
that we are looking for in the LF_[MEM]FUNC_ID record. We already
assumed that looking up the item index already found a record of this
kind.

4 years ago[docs][FileCheck] Fix invalid example
Thomas Preud'homme [Fri, 1 May 2020 18:25:08 +0000 (19:25 +0100)]
[docs][FileCheck] Fix invalid example

Summary:
FileCheck documentation contains an example of a numeric variable
defined and used on the same line. This is not currently supported by
FileCheck so this commit fixes the example to use CHECK-SAME for the
variable use.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D79253

4 years ago[SelectionDAG] Unify scalarizeVectorLoad and VectorLegalizer::ExpandLoad
LemonBoy [Sat, 2 May 2020 21:09:18 +0000 (14:09 -0700)]
[SelectionDAG] Unify scalarizeVectorLoad and VectorLegalizer::ExpandLoad

The two code paths have the same goal, legalizing a load of a non-byte-sized vector by loading the "flattened" representation in memory, slicing off each single element and then building a vector out of those pieces.

The technique employed by `ExpandLoad`  is slightly more convoluted and produces slightly better codegen on ARM, AMDGPU and x86 but suffers from some bugs (D78480) and is wrong for BE machines.

Differential Revision: https://reviews.llvm.org/D79096

4 years ago[COFF] Use a global option table to avoid reconstructing it
Reid Kleckner [Sat, 2 May 2020 21:53:59 +0000 (14:53 -0700)]
[COFF] Use a global option table to avoid reconstructing it

Otherwise an ArgumentParser is constructed for every directive section,
and that involves copying the entire table of options into a vector.
There is no need for this, just have one option table.

4 years ago[test] Fix lld's ELF/linkerscript/thunk-gen-mips.s
Thomas Preud'homme [Fri, 1 May 2020 22:22:07 +0000 (23:22 +0100)]
[test] Fix lld's ELF/linkerscript/thunk-gen-mips.s

Summary:
Lld test ELF/linkerscript/thunk-gen-mips.s was accidentally disabled due
to the use of wrong FileCheck directives. As a result the test seems to
have bitrotted as it fails to pass if fixing the directive. To ease
updates to the test in case of change of the __start address the checks
have been changed to use numeric variables to express all the addresses
based on the __start address.

Reviewed By: atanasyan

Differential Revision: https://reviews.llvm.org/D79270

4 years ago[libclang]: visit C++17 if init statements
Milian Wolff [Sat, 2 May 2020 20:18:09 +0000 (22:18 +0200)]
[libclang]: visit C++17 if init statements

This makes the previously unaccessible AST nodes for C++17 "if with
init statements" accessible to consumers of libclang.

Differential Revision: https://reviews.llvm.org/D78214

4 years ago[libclang]: visit BindingDecl in DecompositionDecl
Milian Wolff [Sat, 2 May 2020 20:17:59 +0000 (22:17 +0200)]
[libclang]: visit BindingDecl in DecompositionDecl

This makes the BindingDecl accessible to consumers of libclang
as CXCursor_UnexposedDecl where previously these AST nodes were
not visited at all from the libclang API.

Differential Revision: https://reviews.llvm.org/D78213

4 years ago[mlir] Add a new context flag for disabling/enabling multi-threading
River Riddle [Sat, 2 May 2020 19:28:57 +0000 (12:28 -0700)]
[mlir] Add a new context flag for disabling/enabling multi-threading

This is useful for several reasons:
* In some situations the user can guarantee that thread-safety isn't necessary and don't want to pay the cost of synchronization, e.g., when parsing a very large module.

* For things like logging threading is not desirable as the output is not guaranteed to be in stable order.

This flag also subsumes the pass manager flag for multi-threading.

Differential Revision: https://reviews.llvm.org/D79266

4 years agoRevert rG8e05ac0a510c - "[DAGCombine] visitTRUNCATE - remove GetDemandedBits call"
Simon Pilgrim [Sat, 2 May 2020 19:08:33 +0000 (20:08 +0100)]
Revert rG8e05ac0a510c - "[DAGCombine] visitTRUNCATE - remove GetDemandedBits call"

Causing buildbot failures

4 years ago[DAGCombine] visitTRUNCATE - remove GetDemandedBits call
Simon Pilgrim [Sat, 2 May 2020 18:51:58 +0000 (19:51 +0100)]
[DAGCombine] visitTRUNCATE - remove GetDemandedBits call

rL368553 added SimplifyMultipleUseDemandedBits handling for ISD::TRUNCATE to SimplifyDemandedBits so we don't need to duplicate this (and it gets rid of another GetDemandedBits call which is slowly being replaced with SimplifyMultipleUseDemandedBits anyhow).

4 years ago[sema] NFC Unable to build Sema library with MSVC Debug target due to missing /bigobj
mydeveloperday [Sat, 2 May 2020 18:33:18 +0000 (19:33 +0100)]
[sema] NFC Unable to build Sema library with MSVC Debug target due to missing /bigobj

Summary:
Unable to build sema library on MSVC with Debug target

```
C:\clang\llvm-project\clang\lib\Sema\SemaOpenMP.cpp : fatal error C1128: number of sections exceeded object file format limit: compile with /bigobj
```

Reviewed By: aaron.ballman

Subscribers: mgorny, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79292

4 years ago[MBP] tuple->pair. NFC.
Benjamin Kramer [Sat, 2 May 2020 18:18:09 +0000 (20:18 +0200)]
[MBP] tuple->pair. NFC.

std::pair has a trivial copy ctor, std::tuple doesn't.

4 years ago[gn build] Port 8f766e382b77e more and fix 2 llvm-config test failures.
Nico Weber [Sat, 2 May 2020 18:10:18 +0000 (14:10 -0400)]
[gn build] Port 8f766e382b77e more and fix 2 llvm-config test failures.

The failures only happened in fully clean builds.

Also put all current dependencies of LibraryDependencies.inc in the
build graph, so that this type of thing will cause a failure in
incremental builds next time as well.

4 years ago[COFF] Add and use a zero-copy tokenizer for .drectve
Reid Kleckner [Fri, 1 May 2020 14:34:12 +0000 (07:34 -0700)]
[COFF] Add and use a zero-copy tokenizer for .drectve

This generalizes the main Windows command line tokenizer to be able to
produce StringRef substrings as well as freshly copied C strings. The
implementation is still shared with the normal tokenizer, which is
important, because we have unit tests for that.

.drective sections can be very long. They can potentially list up to
every symbol in the object file by name. It is worth avoiding these
string copies.

This saves a lot of memory when linking chrome.dll with PGO
instrumentation:

             BEFORE      AFTER      % IMP
peak memory: 6657.76MB   4983.54MB  -25%
real:        4m30.875s   2m26.250s  -46%

The time improvement may not be real, my machine was noisy while running
this, but that the peak memory usage improvement should be real.

This change may also help apps that heavily use dllexport annotations,
because those also use linker directives in object files. Apps that do
not use many directives are unlikely to be affected.

Reviewed By: thakis

Differential Revision: https://reviews.llvm.org/D79262

4 years ago[SmallVector] Weaken the predicate for the memcpy optimization
Benjamin Kramer [Sat, 2 May 2020 17:22:15 +0000 (19:22 +0200)]
[SmallVector] Weaken the predicate for the memcpy optimization

We don't require the type to be trivially assignable. While the standard
says that only is_trivially_copyable types may be memcpy'd, this seems
overly strict. We never assign the type, so there's no way for the type
to observe that the copy/move construction got elided. This is important
for std::pair<POD, POD>, which is not trivially assignable and probably
never will be because changing that would break ABI.

As a side-effect this no longer allows types with deleted copy/move
constructors in SmallVector. That's an unintended side-effect of
is_trivially_copyable anyways.

Shrinks Release+Asserts clang by 20k.

4 years agoDon't stash types that aren't copyable or moveable into a SmallVector
Benjamin Kramer [Sun, 26 Apr 2020 20:44:31 +0000 (22:44 +0200)]
Don't stash types that aren't copyable or moveable into a SmallVector

This seems to be working by accident.

4 years agoUse realloc for NestedNameSpecifierLocBuilder
Benjamin Kramer [Sat, 2 May 2020 15:04:52 +0000 (17:04 +0200)]
Use realloc for NestedNameSpecifierLocBuilder

These allocations are so tiny that the buffer can be grown in-place most
of the time.

4 years ago[clang-format] NFC - clang-format the FormatTests
mydeveloperday [Sat, 2 May 2020 14:42:20 +0000 (15:42 +0100)]
[clang-format] NFC - clang-format the FormatTests

Summary:
Ensure the clang-format unit tests are themselves clang-formatted

Having areas of the llvm code which are clang-format clean, give us more areas to run new clang-format binaries on ensuring we haven't broken anything.

It seems to me we SHOULD have this clang-formatted at a minimum, otherwise how can we expect others to use clang-format if we "don't eat our own dogfood", also if the tests are dependent on the formatting of the code then that would also be bad!

Reviewed By: sammccall

Subscribers: cfe-commits

Tags: #clang, #clang-format

Differential Revision: https://reviews.llvm.org/D79204

4 years ago[Allocator] Make Deallocate() pass alignment and make it use (de)allocate_buffer
Benjamin Kramer [Sat, 2 May 2020 13:59:10 +0000 (15:59 +0200)]
[Allocator] Make Deallocate() pass alignment and make it use (de)allocate_buffer

This lets it use sized deallocation and make more efficient alignment
decisions. Also adjust BumpPtrAllocator to always allocate at
alignof(std::max_align_t).

4 years ago[RISCV] Implement convertSelectOfConstantsToMath
Sam Elliott [Sat, 2 May 2020 14:05:12 +0000 (15:05 +0100)]
[RISCV] Implement convertSelectOfConstantsToMath

Summary:
The current lowering of `select` on RISC-V uses a branch instruction to load a
register with one or other value. This is inefficient, especially in the case of
small constants that can be computed easily.

By implementing the TargetLowering::convertSelectOfConstantsToMath hook, some of
the simpler cases are covered that let us avoid introducing a branch in these
cases.

Reviewed By: luismarques

Differential Revision: https://reviews.llvm.org/D79260

4 years ago[RISCV][NFC] Tests for (select (const), (const))
Sam Elliott [Sat, 2 May 2020 14:05:02 +0000 (15:05 +0100)]
[RISCV][NFC] Tests for (select (const), (const))

Summary:
This just adds some simple cases for testing select of constants. There will be
a follow-up patch that improves code generation in some of these cases.

Reviewed By: luismarques

Differential Revision: https://reviews.llvm.org/D79259

4 years ago[RISCV] Add patterns for checking isnan
Sam Elliott [Sat, 2 May 2020 14:00:38 +0000 (15:00 +0100)]
[RISCV] Add patterns for checking isnan

Summary:
This patch addresses some weird assembly sequences we were seeing during
comparing floats. In particular, comparing a float to itself tells you whether
it is NaN or not, which we were doing correctly, but with an extra unneeded
`and` instruction.

This patch specialises the existing patterns to remove the `and` instructions
when both their operands are the same.

Reviewed By: luismarques, asb

Differential Revision: https://reviews.llvm.org/D78908

4 years ago[RISCV][NFC] Add tests for checking isnan patterns
Sam Elliott [Sat, 2 May 2020 13:56:35 +0000 (14:56 +0100)]
[RISCV][NFC] Add tests for checking isnan patterns

Summary:
I worked on adding some SelectionDag patterns to address code generated by these
examples, which came out of some differential testing against GCC. The pattern
additions will be in a follow-up patch.

Reviewers: luismarques, asb

Reviewed By: luismarques, asb

Differential Revision: https://reviews.llvm.org/D78907

4 years agostd::isspace -> llvm::isSpace (where locale should be ignored)
Sam McCall [Sat, 2 May 2020 13:34:53 +0000 (15:34 +0200)]
std::isspace -> llvm::isSpace (where locale should be ignored)

I've left out some cases where I wasn't totally sure this was right or
whether the include was ok (compiler-rt) or idiomatic (flang).

4 years ago[ADT] Add locale-independent isSpace() to StringExtras. NFC
Sam McCall [Sat, 2 May 2020 13:18:35 +0000 (15:18 +0200)]
[ADT] Add locale-independent isSpace() to StringExtras. NFC

Use this in clangd, will follow up with replacements for isspace where
locale-dependent is clearly not intended.

4 years ago[gn build] Port fa1f4cf8432
LLVM GN Syncbot [Sat, 2 May 2020 12:54:28 +0000 (12:54 +0000)]
[gn build] Port fa1f4cf8432

4 years ago[clangd] Rename FormattedString -> Markup, move to support. NFC
Sam McCall [Sat, 2 May 2020 12:53:47 +0000 (14:53 +0200)]
[clangd] Rename FormattedString -> Markup, move to support. NFC

4 years ago[clangd] Fix whitespace between chunks in markdown paragraphs.
Sam McCall [Wed, 29 Apr 2020 23:03:59 +0000 (01:03 +0200)]
[clangd] Fix whitespace between chunks in markdown paragraphs.

Summary:
Old model: chunks are always separated by one space.
           This makes it impossible to render "Foo `bar`." correctly.

New model: chunks are separated by space if the left had trailing space, or
           the right had leading space, or space was explicitly requested.
           (Only leading/trailing space in plaintext chunks count, not code)

Reviewers: kadircet

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79139

4 years ago[clang-tidy] extend bugprone-signed-char-misuse check with array subscript case.
Tamás Zolnai [Sat, 2 May 2020 12:04:17 +0000 (14:04 +0200)]
[clang-tidy] extend bugprone-signed-char-misuse check with array subscript case.

Summary:
To cover STR34-C rule's second use case, where ``signed char`` is
used for array subscript after an integer conversion. In the case
of non-ASCII character this conversion will result in a value
in excess of UCHAR_MAX.

There is another clang-tidy check which catches these cases.
cppcoreguidelines-pro-bounds-constant-array-index catches any
indexing which is not integer constant. I think this check is
very strict about the index (e.g. constant), so it's still useful
to cover the ``signed char`` use case in this check, so we
can provide a way to catch the SEI cert rule's use cases on a
codebase, where this CPP guideline is not used.

Reviewers: aaron.ballman, njames93

Reviewed By: aaron.ballman

Subscribers: xazax.hun, cfe-commits

Tags: #clang, #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D78904

4 years ago[libc++][P1115][C++20] Improving the Return Value of Erase-Like Algorithms II: Free...
Marek Kurdej [Sat, 2 May 2020 11:58:03 +0000 (13:58 +0200)]
[libc++][P1115][C++20] Improving the Return Value of Erase-Like Algorithms II: Free erase/erase if.

Summary:
This patch adds return type to std::erase and std::erase_if functions.

Also:
* Update __cpp_lib_erase_if to 202002L.
* Fix synopsis in unordered_map.
* Fix generate_feature_test_macro_components.py script.

Reviewers: EricWF, mclow.lists, ldionne, #libc

Reviewed By: ldionne, #libc

Subscribers: broadwaylamb, zoecarver, dexonsmith, ldionne, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75905

4 years ago[ValueTracking] Short-circuit GEP known bits calculation (NFC)
Nikita Popov [Sat, 2 May 2020 09:47:04 +0000 (11:47 +0200)]
[ValueTracking] Short-circuit GEP known bits calculation (NFC)

Don't compute known bits of all GEP operands, if we already know
that we don't know anything.

4 years agoRemove getNumUses() comparisons (NFC)
Nikita Popov [Sat, 2 May 2020 09:03:36 +0000 (11:03 +0200)]
Remove getNumUses() comparisons (NFC)

getNumUses() scans the full use list. Don't use it is we only want
to check if there's zero or one uses.

4 years ago[MergeFuncs] Don't merge shufflevectors with different masks
Nikita Popov [Fri, 1 May 2020 20:28:59 +0000 (22:28 +0200)]
[MergeFuncs] Don't merge shufflevectors with different masks

When the shufflevector mask operand was converted into special
instruction data, the FunctionComparator was not updated to
account for this. As such, MergeFuncs will happily merge
shufflevectors with different masks.

This fixes https://bugs.llvm.org/show_bug.cgi?id=45773.

Differential Revision: https://reviews.llvm.org/D79261

4 years ago[Object] Change ObjectFile::getSymbolValue() return type to Expected<uint64_t>
Xing GUO [Sat, 2 May 2020 06:04:04 +0000 (14:04 +0800)]
[Object] Change ObjectFile::getSymbolValue() return type to Expected<uint64_t>

Summary:
In D77860, we have changed `getSymbolFlags()` return type to `Expected<uint32_t>`.
This change helps bubble the error further up the stack.

Reviewers: jhenderson, grimar, JDevlieghere, MaskRay

Reviewed By: jhenderson

Subscribers: hiraditya, MaskRay, rupprecht, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79075

4 years ago[MLIR] Ensure that out-of-tree users have an mlir-generic-headers target
Stephen Neuendorffer [Sat, 2 May 2020 05:12:40 +0000 (22:12 -0700)]
[MLIR] Ensure that out-of-tree users have an mlir-generic-headers target

Prior change introduces this target, but we need it for out-of-tree users
too

4 years agoAdd the missing '='. NFC.
Michael Liao [Sat, 2 May 2020 05:07:44 +0000 (01:07 -0400)]
Add the missing '='. NFC.

4 years ago[MLIR] add dependencies for all tablegen targets on 'mlir-headers'
Stephen Neuendorffer [Fri, 24 Apr 2020 23:42:07 +0000 (16:42 -0700)]
[MLIR] add dependencies for all tablegen targets on 'mlir-headers'

In cmake, dependencies on generated files require some sophistication in the build system.  At build time, files are parsed to determine which headers they depend on and these dependencies are injected into the build system.  This works well with ninja, but has some constraints with the makefile generator.  According to the cmake documentation, this only works reliably within the same directory.

This patch expands the usage of mlir-headers to include all generated headers and adds an mlir-generic-headers target which triggers generation of dialect-independent headers.  These targets are used to express dependencies on generated headers.  This is mostly handled in AddMLIR.cmake and only a few CMakeLists.txt files need to change.

Differential Revision: https://reviews.llvm.org/D79242

4 years ago[MLIR] Move Verifier and Dominance Analysis from /Analysis to /IR
Stephen Neuendorffer [Thu, 30 Apr 2020 20:09:13 +0000 (13:09 -0700)]
[MLIR] Move Verifier and Dominance Analysis from /Analysis to /IR

These libraries are distinct from other things in Analysis in that they
operate only on core IR concepts.  This also simplifies dependencies
so that Dialect -> Analysis -> Parser -> IR.  Previously, the parser depended
on portions of the the Analysis directory as well, which sometimes
caused issues with the way the cmake makefile generator discovers
dependencies on generated files during compilation.

Differential Revision: https://reviews.llvm.org/D79240

4 years ago[mlir][NFC] Cleanup StandardTypes and reorder the type classes
River Riddle [Sat, 2 May 2020 02:25:32 +0000 (19:25 -0700)]
[mlir][NFC] Cleanup StandardTypes and reorder the type classes

4 years ago[CostModel][X86][ARM] Teach default implementation of getCastInstrCost to not add...
Craig Topper [Sat, 2 May 2020 01:35:42 +0000 (18:35 -0700)]
[CostModel][X86][ARM] Teach default implementation of getCastInstrCost to not add a split/join cost if source type and the destination type both have a SplitVector action

If both the source and the destination need to be split then the two halves of the split operation are completely independent and don't need to be split or joined. So we don't need to assess a cost for the split or join.

Differential Revision: https://reviews.llvm.org/D79111

4 years ago[X86] Use more accurate increments for the induction variables in sad.ll. NFC
Craig Topper [Sat, 2 May 2020 00:30:41 +0000 (17:30 -0700)]
[X86] Use more accurate increments for the induction variables in sad.ll. NFC

I think some copy/pasting was used to create loops of different
VFs. But the increment of the induction variable wasn't updated
to match the VF.

This has no effect on the pattern matching we're testing, it just
helps the test make sense to the reader.

4 years ago[llvm-objcopy][MachO] Fix isExternalSymbol method
Alexander Shaposhnikov [Sat, 2 May 2020 01:22:35 +0000 (18:22 -0700)]
[llvm-objcopy][MachO] Fix isExternalSymbol method

N_PEXT bit should not affect whether a symbol is considered to be external or not.
This also fixes the construction of the symbol table since it relies on the correct
ordering of symbols.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D78888

4 years ago[lit] Don't use Python3 yet
Julian Lettner [Sat, 2 May 2020 00:35:40 +0000 (17:35 -0700)]
[lit] Don't use Python3 yet

String interpolation is a Python3 feature, we can't use it yet.

4 years ago[WebAssembly] Renumber SIMD opcodes
Thomas Lively [Fri, 1 May 2020 01:11:15 +0000 (18:11 -0700)]
[WebAssembly] Renumber SIMD opcodes

Summary:
As described in https://github.com/WebAssembly/simd/pull/209. This is
the final reorganization of the SIMD opcode space before
standardization. It has been landed in concert with corresponding
changes in other projects in the WebAssembly SIMD ecosystem.

Reviewers: aheejin

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

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79224

4 years ago[PowerPC] Refactor PPCInstrVSX.td
Nemanja Ivanovic [Sat, 2 May 2020 00:17:30 +0000 (19:17 -0500)]
[PowerPC] Refactor PPCInstrVSX.td

Over time, we have made many additions to this file and it has frankly become a
bit of a mess. This has led to at least one issue - we have a number of
instructions where the side effects flag should be set to false and we neglected
to do this. This patch suggests a refactoring that should make the file much
more maintainable. The file is split up into major sections and the nesting
level is reduced, predicate blocks merged, etc.

Sections:
  - Custom PPCISD node definitions
  - Predicate definitions
  - Instruction formats
  - Instruction definitions
  - Helper DAG definitions
  - Anonymous patterns
  - Instruction aliases

Differential revision: https://reviews.llvm.org/D78132

4 years ago[lit] Extract by_suite_and_test_path sort key function
Julian Lettner [Fri, 1 May 2020 23:27:59 +0000 (16:27 -0700)]
[lit] Extract by_suite_and_test_path sort key function

4 years ago[lit] Create report generators during argument parsing
Julian Lettner [Fri, 1 May 2020 22:52:44 +0000 (15:52 -0700)]
[lit] Create report generators during argument parsing

4 years ago[lit] Small refinements for xunit report output
Julian Lettner [Fri, 1 May 2020 22:20:18 +0000 (15:20 -0700)]
[lit] Small refinements for xunit report output

4 years ago[lit] Factor out report generators into separate file
Julian Lettner [Fri, 1 May 2020 16:35:46 +0000 (09:35 -0700)]
[lit] Factor out report generators into separate file

Factor out the report generators from main.py into reports.py.

I verified that we generate the exact same output by running `check-all`
and comparing the new and old output for both report flavors.

4 years ago[lit] Only update specific fields from remote test object
Julian Lettner [Fri, 1 May 2020 16:51:46 +0000 (09:51 -0700)]
[lit] Only update specific fields from remote test object

Don't update whole test object from the remote (pickled) finished test
object.  Doing so also changes the config and suite members, which we
want to avoid.

4 years ago[gn build] Port 6cb073133c5
LLVM GN Syncbot [Sat, 2 May 2020 00:00:04 +0000 (00:00 +0000)]
[gn build] Port 6cb073133c5

4 years ago[lld] Merge Mach-O input sections
Kellie Medlin [Fri, 1 May 2020 23:29:06 +0000 (16:29 -0700)]
[lld] Merge Mach-O input sections

Summary: Similar to other formats, input sections in the MachO
implementation are now grouped under output sections. This is primarily
a refactor, although there's some new logic (like resolving the output
section's flags based on its inputs).

Differential Revision: https://reviews.llvm.org/D77893

4 years ago[mlir][DenseStringElementsAttr] Add support for the Attribute based get* methods.
River Riddle [Fri, 1 May 2020 23:26:45 +0000 (16:26 -0700)]
[mlir][DenseStringElementsAttr] Add support for the Attribute based get* methods.

This was missed in the original revision. This allows for using the opaque Attribute accessors when the elements are strings.

4 years ago[llvm][NFC] Rename variable as per https://reviews.llvm.org/D79215
Mircea Trofin [Fri, 1 May 2020 23:30:41 +0000 (16:30 -0700)]
[llvm][NFC] Rename variable as per https://reviews.llvm.org/D79215

Operator error - performed the rename and didn't save.

4 years ago[llvm][NFC] Inliner: simplify inlining decision logic
Mircea Trofin [Thu, 30 Apr 2020 23:22:31 +0000 (16:22 -0700)]
[llvm][NFC] Inliner: simplify inlining decision logic

Summary:
shouldInline makes a decision based on the InlineCost of a call site, as
well as an evaluation on whether the site should be deferred. This means
it's possible for the decision to be not to inline, even for an
InlineCost that would otherwise allow it.

Both uses of shouldInline performed the exact same logic after calling
it. In addition, the decision on whether to inline or not was
communicated through two values of the Option<InlineCost> return value:
None, or an InlineCost evaluating to false.

Simplified by:
- encapsulating the decision in the return object. The bool it evaluates
to communicates unambiguously the decision. The InlineCost is also
available.
- encapsulated the common post-shouldInline code into shouldInline.

Reviewers: davidxl, echristo, eraman

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D79215

4 years ago[mlir][GPUOpsLowering] Add missing include for FormatVariadic
River Riddle [Fri, 1 May 2020 22:57:42 +0000 (15:57 -0700)]
[mlir][GPUOpsLowering] Add missing include for FormatVariadic

4 years ago[ARM64] Remove more dead code. NFC.
Davide Italiano [Fri, 1 May 2020 22:05:42 +0000 (15:05 -0700)]
[ARM64] Remove more dead code. NFC.

4 years ago[ARM64] Remove dead code.
Davide Italiano [Fri, 1 May 2020 22:04:44 +0000 (15:04 -0700)]
[ARM64] Remove dead code.

4 years ago[SveEmitter] Add builtins for shifts.
Sander de Smalen [Fri, 1 May 2020 20:39:16 +0000 (21:39 +0100)]
[SveEmitter] Add builtins for shifts.

This patch adds builtins for:
- svasrd
- svlsl
- svlsr

4 years ago[llvm-objcopy] -O binary: skip empty sections
Fangrui Song [Fri, 1 May 2020 05:15:05 +0000 (22:15 -0700)]
[llvm-objcopy] -O binary: skip empty sections

After SHF_ALLOC sections are ordered by LMA:

* If initial sections are empty, GNU objcopy skips their contents while we
  emit leading zeros. (binary-paddr.test %t4)
* If trailing sections are empty, GNU objcopy skips their contents while we
  emit trailing zeros. (binary-paddr.test %t5)

This patch matches GNU objcopy's behavior. Linkers don't keep p_memsz
PT_LOAD segments. Such empty sections would not have a containing
PT_LOAD and `Section::ParentSegment` might be null if linkers fail to
optimize the file offsets (lld D79254).

In particular, without D79254, the arm Linux kernel's multi_v5_defconfig
depends on this behavior: in `vmlinux`, an empty .text_itcm is mapped at
a very high address (0xfffe0000) but the kernel does not expect
`objcopy -O binary` to create a very large `arch/arm/boot/Image`
(0xfffe0000-0xc0000000 ~= 1GiB). See https://bugs.llvm.org/show_bug.cgi?id=45632

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D79229

4 years ago[clang][OpenMP] Fix mangling of linear parameters.
Francesco Petrogalli [Mon, 27 Apr 2020 19:39:42 +0000 (19:39 +0000)]
[clang][OpenMP] Fix mangling of linear parameters.

Summary:
The linear parameter token in the mangling function must be multiplied
by the pointee size in bytes when the parameter is a pointer.

Reviewers: ABataev, andwar, jdoerfert

Subscribers: yaxunl, guansong, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D78965

4 years ago[AIX] Skip unsupported ORC JIT RemoteObjectLayerTest on AIX
David Tenty [Fri, 1 May 2020 19:48:21 +0000 (15:48 -0400)]
[AIX] Skip unsupported ORC JIT RemoteObjectLayerTest on AIX

Summary:
Currently the XCOFF backend does not support writing 64-bit object
files, which the ORC JIT tests will try to exercise if we are on AIX. This patch
selectively disables the tests on AIX for now.

Reviewers: hubert.reinterpretcast, jasonliu, DiggerLin, stevewan, lhames

Reviewed By: hubert.reinterpretcast, lhames

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D78813

4 years ago[lldb/API] Add SBCommandInterpreterRunResult
Jonas Devlieghere [Fri, 1 May 2020 20:23:51 +0000 (13:23 -0700)]
[lldb/API] Add SBCommandInterpreterRunResult

This adds an RunCommandInterpreter overload that returns an instance of
SBCommandInterpreterRunResults. The goal is to avoid having to add more
and more overloads when we need more output arguments.

Differential revision: https://reviews.llvm.org/D79120