platform/upstream/llvm.git
6 years ago[LazyValueInfo] PR33357 prevent infinite recursion on BinaryOperator
Brian M. Rzycki [Tue, 13 Mar 2018 18:14:10 +0000 (18:14 +0000)]
[LazyValueInfo] PR33357 prevent infinite recursion on BinaryOperator

Summary:
It is possible for LVI to encounter instructions that are not in valid
SSA form and reference themselves. One example is the following:
  %tmp4 = and i1 %tmp4, undef
Before this patch LVI would recurse until running out of stack memory
and crashed.  This patch marks these self-referential instructions as
Overdefined and aborts analysis on the instruction.

Fixes https://bugs.llvm.org/show_bug.cgi?id=33357

Reviewers: craig.topper, anna, efriedma, dberlin, sebpop, kuhar

Reviewed by: dberlin

Subscribers: uabelho, spatel, a.elovikov, fhahn, eli.friedman, mzolotukhin, spop, evandro, davide, llvm-commits

Differential Revision: https://reviews.llvm.org/D34135

llvm-svn: 327432

6 years agoImplement pure virtual method to fix build.
Zachary Turner [Tue, 13 Mar 2018 17:58:28 +0000 (17:58 +0000)]
Implement pure virtual method to fix build.

llvm-svn: 327431

6 years agoHandle mixed-OS paths in DWARF reader
Eugene Zemtsov [Tue, 13 Mar 2018 17:54:29 +0000 (17:54 +0000)]
Handle mixed-OS paths in DWARF reader

Make sure that DWARF line information generated by Windows can be properly read by Posix OS and vice versa.

Differential Revision: https://reviews.llvm.org/D44290

llvm-svn: 327430

6 years ago[MC] fix documentation comments; NFC
Sanjay Patel [Tue, 13 Mar 2018 17:50:27 +0000 (17:50 +0000)]
[MC] fix documentation comments; NFC

llvm-svn: 327429

6 years ago[PDB] Support dumping injected sources via the DIA reader.
Zachary Turner [Tue, 13 Mar 2018 17:46:06 +0000 (17:46 +0000)]
[PDB] Support dumping injected sources via the DIA reader.

Injected sources are basically a way to add actual source file content
to your PDB. Presumably you could use this for shipping your source code
with your debug information, but in practice I can only find this being
used for embedding natvis files inside of PDBs.

In order to effectively test LLVM's natvis file injection, we need a way
to dump the injected sources of a PDB in a way that is authoritative
(i.e. based on Microsoft's understanding of the PDB format, and not
LLVM's). To this end, I've added support for dumping injected sources
via DIA. I made a PDB file that used the /natvis option to generate a
test case.

Differential Revision: https://reviews.llvm.org/D44405

llvm-svn: 327428

6 years agoRevert "[mips] Guard traps for microMIPS correctly"
Simon Dardis [Tue, 13 Mar 2018 17:31:11 +0000 (17:31 +0000)]
Revert "[mips] Guard traps for microMIPS correctly"

This appears to have broken the expensive checks bot in
a strange fashion. Reverting until I can investigate.

This reverts r327409.

llvm-svn: 327427

6 years ago[analyzer] Fix the matcher for GCDAntipattern to look for "signal" call in all parameters
George Karpenkov [Tue, 13 Mar 2018 17:27:01 +0000 (17:27 +0000)]
[analyzer] Fix the matcher for GCDAntipattern to look for "signal" call in all parameters

rdar://38405904

llvm-svn: 327426

6 years ago[llvm-mca] Remove the logic that computes the reciprocal throughput, and make the...
Andrea Di Biagio [Tue, 13 Mar 2018 17:24:32 +0000 (17:24 +0000)]
[llvm-mca] Remove the logic that computes the reciprocal throughput, and make the SummaryView independent from the Backend. NFCI

Since r327420, the tool can query the MCSchedModel interface to obtain the
reciprocal throughput information.
As a consequence, method `ResourceManager::getRThroughput`, and
method `Backend::getRThroughput` are no longer needed.

This patch simplifies the code by removing the custom RThroughput computation.
This patch also refactors class SummaryView by removing the dependency with
the Backend object.

No functional change intended.

llvm-svn: 327425

6 years ago[DAGCombine] visitREM - Don't assume that one divrem isn't driving another
Simon Pilgrim [Tue, 13 Mar 2018 17:17:15 +0000 (17:17 +0000)]
[DAGCombine] visitREM - Don't assume that one divrem isn't driving another

Under some circumstances the divrems won't have been combined together before getting to this code.

So replace the assertion with a if() guard to not expand to X-((X/C)*C) to give the other combine chance to happen.

Reduced from OSS-Fuzz #6883
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6883

llvm-svn: 327424

6 years agoBuild system changes for RISCV
Azharuddin Mohammed [Tue, 13 Mar 2018 17:04:33 +0000 (17:04 +0000)]
Build system changes for RISCV

Summary: Build system changes for RISCV. Makes it possible to build just the RISCV target alone.

Reviewers: asb, apazos, mgrang, beanz

Reviewed By: asb

Subscribers: mgorny, kito-cheng, shiva0217, llvm-commits

Differential Revision: https://reviews.llvm.org/D44153

llvm-svn: 327423

6 years ago[lit] - Allow 1 test to report multiple micro-test results to provide support for...
Brian Homerding [Tue, 13 Mar 2018 16:37:59 +0000 (16:37 +0000)]
[lit] - Allow 1 test to report multiple micro-test results to provide support for microbenchmarks.

Summary:
These changes are to allow to a Result object to have nested Result objects in
order to support microbenchmarks. Currently lit is restricted to reporting one
result object for one test, this change provides support tests that want to
report individual timings for individual kernels.

This revision is the result of the discussions in
https://reviews.llvm.org/D32272#794759,
https://reviews.llvm.org/D37421#f8003b27 and https://reviews.llvm.org/D38496.
It is a separation of the changes purposed in https://reviews.llvm.org/D40077.

This change will enable adding LCALS (Livermore Compiler Analysis Loop Suite)
collection of loop kernels to the llvm test suite using the google benchmark
library (https://reviews.llvm.org/D43319) with tracking of individual kernel
timings.

Previously microbenchmarks had been handled by using macros to section groups
of microbenchmarks together and build many executables while still getting a
grouped timing (MultiSource/TSVC). Recently the google benchmark library was
added to the test suite and utilized with a litsupport plugin. However the
limitation of 1 test 1 result limited its use to passing a runtime option to
run only 1 microbenchmark with several hand written tests
(MicroBenchmarks/XRay). This runs the same executable many times with different
hand-written tests. I will update the litsupport plugin to utilize the new
functionality (https://reviews.llvm.org/D43316).

These changes allow lit to report micro test results if desired in order to get
many precise timing results from 1 run of 1 test executable.

Reviewers: MatzeB, hfinkel, rengolin, delcypher

Differential Revision: https://reviews.llvm.org/D43314

llvm-svn: 327422

6 years ago[SelectionDAGBuilder] Replace deprecated calls to MemoryIntrinsic::getAlignment(...
Daniel Neilson [Tue, 13 Mar 2018 16:31:19 +0000 (16:31 +0000)]
[SelectionDAGBuilder] Replace deprecated calls to MemoryIntrinsic::getAlignment() (NFCI)

Summary:
This change is part of step five in the series of changes to remove alignment argument from
memcpy/memmove/memset in favour of alignment attributes. In particular, this changes the
SelectionDAGBuilder to cease using the old getAlignment() API of MemoryIntrinsic in favour of getting
source & dest specific alignments through the new API.

Steps:
Step 1) Remove alignment parameter and create alignment parameter attributes for
memcpy/memmove/memset. ( rL322965, rC322964, rL322963 )
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
source and dest alignments. ( rL323597 )
Step 3) Update Clang to use the new IRBuilder API. ( rC323617 )
Step 4) Update Polly to use the new IRBuilder API. ( rL323618 )
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
and those that use use MemIntrinsicInst::[get|set]Alignment() to use [get|set]DestAlignment()
and [get|set]SourceAlignment() instead. ( rL323886, rL323891, rL324148, rL324273, rL324278,
rL324384, rL324395, rL324402, rL324626, rL324642, rL324653, rL324654, rL324773, rL324774,
rL324781, rL324784, rL324955, rL324960, rL325816, rL327398 )
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
MemIntrinsicInst::[get|set]Alignment() methods.

Reference
   http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
   http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html

llvm-svn: 327421

6 years ago[MC] Move the reciprocal throughput computation from TargetSchedModel to MCSchedModel.
Andrea Di Biagio [Tue, 13 Mar 2018 16:28:55 +0000 (16:28 +0000)]
[MC] Move the reciprocal throughput computation from TargetSchedModel to MCSchedModel.

The goal is to make the reciprocal throughput computation accessible through the
MCSchedModel interface. This is particularly important for llvm-mca because it
can only query the MCSchedModel interface.

No functional change intended.

Differential Revision: https://reviews.llvm.org/D44392

llvm-svn: 327420

6 years ago[ELF} - Fix build bots.
George Rimar [Tue, 13 Mar 2018 16:23:48 +0000 (16:23 +0000)]
[ELF} - Fix build bots.

llvm-svn: 327419

6 years ago[X86] Remove SplitBinaryOpsAndApply and use SplitOpsAndApply by adding curly braces...
Craig Topper [Tue, 13 Mar 2018 16:23:27 +0000 (16:23 +0000)]
[X86] Remove SplitBinaryOpsAndApply and use SplitOpsAndApply by adding curly braces around the ops.

Summary: Unless you were intentionally avoiding this syntax? I saw you mentioned makeArrayRef in your commit that added SplitOpsAndApply.

Reviewers: RKSimon

Reviewed By: RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D44403

llvm-svn: 327418

6 years ago[ELF] - Fix mistype in comment. NFC.
George Rimar [Tue, 13 Mar 2018 16:11:02 +0000 (16:11 +0000)]
[ELF] - Fix mistype in comment. NFC.

llvm-svn: 327417

6 years ago[ELF] - Rename test cases to *.test.
George Rimar [Tue, 13 Mar 2018 16:02:45 +0000 (16:02 +0000)]
[ELF] - Rename test cases to *.test.

This is a follow-up for r327410.

llvm-svn: 327416

6 years ago[llvm-mca] Simplify code that computes the latency of an instruction in
Andrea Di Biagio [Tue, 13 Mar 2018 15:59:59 +0000 (15:59 +0000)]
[llvm-mca] Simplify code that computes the latency of an instruction in
InstrBuilder. NFCI

This was possible because of r327406, which added function`computeInstrLatency`
to MCSchedModel.

llvm-svn: 327415

6 years agoRevert r327397 [CodeView] Omit forward references for unnamed structs and ...
Brock Wyma [Tue, 13 Mar 2018 15:56:20 +0000 (15:56 +0000)]
Revert r327397 [CodeView] Omit forward references for unnamed structs and ...

This reverts commit r327397 to investigate a buildbot failure.

llvm-svn: 327414

6 years agoinclude locale.h in IOHandler.cpp
Pavel Labath [Tue, 13 Mar 2018 15:55:00 +0000 (15:55 +0000)]
include locale.h in IOHandler.cpp

This is needed for the setlocale() call, and it seems that it is not
transitively pulled in for some build configurations.

llvm-svn: 327413

6 years agotest commit: fix formatting of a comment
Zaara Syeda [Tue, 13 Mar 2018 15:49:05 +0000 (15:49 +0000)]
test commit: fix formatting of a comment
This is  a simple change to do the test commit.

llvm-svn: 327412

6 years ago[dsymutil] Unify error handling outside DwarfLinker.
Jonas Devlieghere [Tue, 13 Mar 2018 15:47:38 +0000 (15:47 +0000)]
[dsymutil] Unify error handling outside DwarfLinker.

This is a follow-up to r327137 where we unified error handling for the
DwarfLinker. This replaces calls to errs() and outs() with the
appropriate ostream wrapper everywhere in dsymutil.

llvm-svn: 327411

6 years ago[ELF] - Represent tests as linker scripts instead of asm.
George Rimar [Tue, 13 Mar 2018 15:47:14 +0000 (15:47 +0000)]
[ELF] - Represent tests as linker scripts instead of asm.

This follows recently started direction and sometimes
allows to fully get rid from `echo` calls.

I'll rename changed files to *.test in a follow-up.

llvm-svn: 327410

6 years ago[mips] Guard traps for microMIPS correctly
Simon Dardis [Tue, 13 Mar 2018 15:46:58 +0000 (15:46 +0000)]
[mips] Guard traps for microMIPS correctly

This is part of fixing the instruction predicates for MIPS.

Reviewers: atanasyan, abeserminji

Differential Revision: https://reviews.llvm.org/D44212

llvm-svn: 327409

6 years ago[ThinLTO] Clear dllimport when setting dso_local.
Rafael Espindola [Tue, 13 Mar 2018 15:24:51 +0000 (15:24 +0000)]
[ThinLTO] Clear dllimport when setting dso_local.

This is PR36686.

If a user of a library is LTOed with that library we take the
opportunity to set dso_local, but we don't clear dllimport, which
creates an invalid IR.

llvm-svn: 327408

6 years ago[X86][Btver2] Split i8/i16/i32/i64 div/idiv costs
Simon Pilgrim [Tue, 13 Mar 2018 15:22:24 +0000 (15:22 +0000)]
[X86][Btver2] Split i8/i16/i32/i64 div/idiv costs

We were assuming a mixture of 32/64 division costs.

llvm-svn: 327407

6 years ago[MC] Move the instruction latency computation from TargetSchedModel to MCSchedModel.
Andrea Di Biagio [Tue, 13 Mar 2018 15:22:13 +0000 (15:22 +0000)]
[MC] Move the instruction latency computation from TargetSchedModel to MCSchedModel.

The goal is to make the latency information accessible through the MCSchedModel
interface. This is particularly important for tools like llvm-mca that only have
access to the MCSchedModel API.

This partially fixes PR36676.
No functional change intended.

Differential Revision: https://reviews.llvm.org/D44383

llvm-svn: 327406

6 years agoReland "[Attr] Fix parameter indexing for several attributes"
Joel E. Denny [Tue, 13 Mar 2018 14:51:22 +0000 (14:51 +0000)]
Reland "[Attr] Fix parameter indexing for several attributes"

Relands r326602 (reverted in r326862) with new test and fix for
PR36620.

Differential Revision: https://reviews.llvm.org/D43248

llvm-svn: 327405

6 years ago[InstCombine] fix fmul reassociation to avoid creating an extra fdiv
Sanjay Patel [Tue, 13 Mar 2018 14:46:32 +0000 (14:46 +0000)]
[InstCombine] fix fmul reassociation to avoid creating an extra fdiv

This was supposed to be an NFC refactoring that will eventually allow
eliminating the isFast() predicate, but there's a rare possibility
that we would pessimize the code as shown in the test case because
we failed to check 'hasOneUse()' properly. This version also removes
an inefficiency of the old code; we would look for:
(X * C) * C1 --> X * (C * C1)
...but that pattern is always handled by
SimplifyAssociativeOrCommutative().

llvm-svn: 327404

6 years ago[mips] Fix the definitions of the EVA instructions
Simon Dardis [Tue, 13 Mar 2018 14:39:44 +0000 (14:39 +0000)]
[mips] Fix the definitions of the EVA instructions

Correct their availability to their respective ISAs.

Reviewers: atanasyan

Differential Revision: https://reviews.llvm.org/D44209

llvm-svn: 327403

6 years agofix some user facing typos / in the comments
Sylvestre Ledru [Tue, 13 Mar 2018 14:35:10 +0000 (14:35 +0000)]
fix some user facing typos / in the comments

llvm-svn: 327402

6 years ago[clangd] Use the macro name range as the definition range.
Haojian Wu [Tue, 13 Mar 2018 14:31:31 +0000 (14:31 +0000)]
[clangd] Use the macro name range as the definition range.

Summary: This also aligns with the behavior of declarations.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: klimek, ilya-biryukov, jkorous-apple, ioeric, cfe-commits

Differential Revision: https://reviews.llvm.org/D44423

llvm-svn: 327401

6 years ago[dsymutil] Remove old error/warn functions. NFC.
Jonas Devlieghere [Tue, 13 Mar 2018 14:28:07 +0000 (14:28 +0000)]
[dsymutil] Remove old error/warn functions. NFC.

This removes the old error and warn functions that were still present in
the dwarf linker.

llvm-svn: 327400

6 years ago[dsymutil] Perform analyzeContextInfo and CloneDIEs in parallel
Jonas Devlieghere [Tue, 13 Mar 2018 14:27:15 +0000 (14:27 +0000)]
[dsymutil] Perform analyzeContextInfo and CloneDIEs in parallel

This patch makes dsymutil perform analyzeContextInfo and CloneDIEs in
parallel. For the same object file, there is a dependency between the
two. However, we can do analyzeContextInfo for the next object file
while cloning DIEs for the current. This is exactly the approach taken
in this patch.

For WebCore, this leads to a performance improvement of 29% and for
clang we see similar results with at 32% improvement.

A big thanks to Pete Cooper who came up with the original idea and
the PoC.

Differential revision: https://reviews.llvm.org/D43945

llvm-svn: 327399

6 years ago[SROA] Take advantage of separate alignments for memcpy source and destination
Daniel Neilson [Tue, 13 Mar 2018 14:25:33 +0000 (14:25 +0000)]
[SROA] Take advantage of separate alignments for memcpy source and destination

Summary:
This change is part of step five in the series of changes to remove alignment argument from
memcpy/memmove/memset in favour of alignment attributes. In particular, this changes the
SROA pass to cease using the old getAlignment() & setAlignment() APIs of MemoryIntrinsic in
favour of getting source & dest specific alignments through the new API. This allows us
to enhance visitMemTransferInst to be more aggressive setting the alignment in memcpy
calls that it creates, as well as to only change the alignment of a memcpy/memmove
argument that it replaces.

Steps:
Step 1) Remove alignment parameter and create alignment parameter attributes for
memcpy/memmove/memset. ( rL322965, rC322964, rL322963 )
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
source and dest alignments. ( rL323597 )
Step 3) Update Clang to use the new IRBuilder API. ( rC323617 )
Step 4) Update Polly to use the new IRBuilder API. ( rL323618 )
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
and those that use use MemIntrinsicInst::[get|set]Alignment() to use [get|set]DestAlignment()
and [get|set]SourceAlignment() instead. ( rL323886, rL323891, rL324148, rL324273, rL324278,
rL324384, rL324395, rL324402, rL324626, rL324642, rL324653, rL324654, rL324773, rL324774,
rL324781, rL324784, rL324955, rL324960, rL325816 )
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
MemIntrinsicInst::[get|set]Alignment() methods.

Reference
   http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
   http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html

Reviewers: chandlerc, bollu, efriedma

Reviewed By: efriedma

Subscribers: efriedma, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D42974

llvm-svn: 327398

6 years ago[CodeView] Omit forward references for unnamed structs and unions
Brock Wyma [Tue, 13 Mar 2018 14:14:16 +0000 (14:14 +0000)]
[CodeView] Omit forward references for unnamed structs and unions

Codeview references to unnamed structs and unions are expected to refer to the
complete type definition instead of a forward reference so Visual Studio can
resolve the type properly.

Differential Revision: https://reviews.llvm.org/D32498

llvm-svn: 327397

6 years ago[llvm-mca] Use a const ArrayRef in a few places. NFC
Andrea Di Biagio [Tue, 13 Mar 2018 13:58:02 +0000 (13:58 +0000)]
[llvm-mca] Use a const ArrayRef in a few places. NFC

llvm-svn: 327396

6 years ago[TTI] Fix a typo in the comment
Haicheng Wu [Tue, 13 Mar 2018 13:52:47 +0000 (13:52 +0000)]
[TTI] Fix a typo in the comment

llvm-svn: 327395

6 years ago[llvm-mca] Fix unused variable warning in opt mode.
Clement Courbet [Tue, 13 Mar 2018 13:44:18 +0000 (13:44 +0000)]
[llvm-mca] Fix unused variable warning in opt mode.

llvm-svn: 327394

6 years ago[Hexagon] Clang side of r327302 in LLVM
Krzysztof Parzyszek [Tue, 13 Mar 2018 13:30:43 +0000 (13:30 +0000)]
[Hexagon] Clang side of r327302 in LLVM

Add option -m[no-]packets to control generation of instruction packets
(enabled by default).

llvm-svn: 327393

6 years ago[WebAssembly] Demangle symbol names for use by the browser debugger
Nicholas Wilson [Tue, 13 Mar 2018 13:30:04 +0000 (13:30 +0000)]
[WebAssembly] Demangle symbol names for use by the browser debugger

Differential Revision: https://reviews.llvm.org/D44316

llvm-svn: 327392

6 years ago[WebAssembly] Use helper macro from ELF/Options.td to tidy. NFC
Nicholas Wilson [Tue, 13 Mar 2018 13:16:15 +0000 (13:16 +0000)]
[WebAssembly] Use helper macro from ELF/Options.td to tidy. NFC

Differential Revision: https://reviews.llvm.org/D44394

llvm-svn: 327391

6 years ago[WebAssembly] Add missing --demangle arg
Nicholas Wilson [Tue, 13 Mar 2018 13:12:03 +0000 (13:12 +0000)]
[WebAssembly] Add missing --demangle arg

Previously, Config->Demangle was uninitialised (not hooked up to
commandline handling)

Differential Revision: https://reviews.llvm.org/D44301

llvm-svn: 327390

6 years ago[llvm-mca] Refactor event listeners to make the backend agnostic to event types.
Clement Courbet [Tue, 13 Mar 2018 13:11:01 +0000 (13:11 +0000)]
[llvm-mca] Refactor event listeners to make the backend agnostic to event types.

Summary: This is a first step towards making the pipeline configurable.

Subscribers: llvm-commits, andreadb

Differential Revision: https://reviews.llvm.org/D44309

llvm-svn: 327389

6 years ago[mips] Don't create nested CALLSEQ_START..CALLSEQ_END nodes.
Simon Dardis [Tue, 13 Mar 2018 12:50:03 +0000 (12:50 +0000)]
[mips] Don't create nested CALLSEQ_START..CALLSEQ_END nodes.

For the MIPS O32 ABI, the current call lowering logic naively lowers each
call, creating the reserved argument area to hold the argument spill areas for
$a0..$a3 and the outgoing parameter area if one is required at each call site.

In the case of a sufficently large byval argument, a call to memcpy is used
to write the start+16..end of the argument into the outgoing parameter area.
This is done within the CALLSEQ_START..CALLSEQ_END of the callee. The CALLSEQ
nodes are responsible for performing the necessary stack adjustments.

Since the O32/N32/N64 MIPS ABIs do not have a red-zone and writing below the
stack pointer and reading the values back is unpredictable, the call to memcpy
cannot be hoisted out of the callee's CALLSEQ nodes.

However, for the O32 ABI requires the reserved argument area for functions
which have parameters. The naive lowering of calls will then create nested
CALLSEQ sequences. For N32 and N64 these nodes are also created, but with
zero stack adjustments as those ABIs do not have a reserved argument area.

This patch addresses the correctness issue by recognizing the special case
of lowering a byval argument that uses memcpy. By recognizing that the
incoming chain already has a CALLSEQ_START node on it when calling memcpy,
the CALLSEQ nodes are not created. For the N32 and N64 ABIs, this is not an
issue, as no stack adjustment has to be performed.

For the O32 ABI, the correctness reasoning is different. In the case of a
sufficently large byval argument, registers a0..a3 are going to be used for
the callee's arguments, mandating the creation of the reserved argument area.
The call to memcpy in the naive case will also create its own reserved
argument area. However, since the reserved argument area consists of undefined
values, both calls can use the same reserved argument area.

Reviewers: abeserminji, atanasyan

Differential Revision: https://reviews.llvm.org/D44296

llvm-svn: 327388

6 years ago[clangd] Fix irrelevant declaratations in goto definition (on macros).
Haojian Wu [Tue, 13 Mar 2018 12:30:59 +0000 (12:30 +0000)]
[clangd] Fix irrelevant declaratations in goto definition (on macros).

Summary:
DeclrationAndMacrosFinder will find some declarations (not macro!) that are
referened inside the macro somehow, isSearchedLocation() is not sufficient, we
don't know whether the searched source location is macro or not.

Reviewers: ilya-biryukov

Subscribers: klimek, jkorous-apple, ioeric, cfe-commits

Differential Revision: https://reviews.llvm.org/D44293

llvm-svn: 327387

6 years ago[clangd] Remove extra ";", NFC.
Haojian Wu [Tue, 13 Mar 2018 12:26:28 +0000 (12:26 +0000)]
[clangd] Remove extra ";", NFC.

llvm-svn: 327386

6 years ago[X86][SSE41] createVariablePermute v2X64 - PCMPEQQ can test for index 0/1 and select...
Simon Pilgrim [Tue, 13 Mar 2018 12:22:58 +0000 (12:22 +0000)]
[X86][SSE41] createVariablePermute v2X64 - PCMPEQQ can test for index 0/1 and select between them.

llvm-svn: 327385

6 years ago[dsymutil] Unbreak non-Darwin bots.
Jonas Devlieghere [Tue, 13 Mar 2018 11:32:19 +0000 (11:32 +0000)]
[dsymutil] Unbreak non-Darwin bots.

BinaryHolder -> BinHolder

llvm-svn: 327384

6 years agoclang-import-test: fix build with clang-3.8
Pavel Labath [Tue, 13 Mar 2018 11:28:27 +0000 (11:28 +0000)]
clang-import-test: fix build with clang-3.8

clang-3.8 complains that constructor for '...' must explicitly
initialize the const object. Newer clangs and gcc seem to be fine with
this, but explicitly initializing the variable does not hurt.

llvm-svn: 327383

6 years ago[dsymutil] Introduce LinkContext. NFC.
Jonas Devlieghere [Tue, 13 Mar 2018 10:52:49 +0000 (10:52 +0000)]
[dsymutil] Introduce LinkContext. NFC.

This patch introduces the LinkContext which is necessary to have
dsymutil perform analysis and cloning of DIEs in parallel. As requested
in D43945, I'm landing this as two separate commits.

llvm-svn: 327382

6 years ago[Evaluator] Evaluate load/store with bitcast
Eugene Leviant [Tue, 13 Mar 2018 10:19:50 +0000 (10:19 +0000)]
[Evaluator] Evaluate load/store with bitcast

Differential revision: https://reviews.llvm.org/D43457

llvm-svn: 327381

6 years agoFix clang-3.8 build
Pavel Labath [Tue, 13 Mar 2018 09:46:10 +0000 (09:46 +0000)]
Fix clang-3.8 build

clang-3.8 complains that constructor for '...' must explicitly
initialize the const member. Newer clangs and gcc seem to be fine with
this, but explicitly initializing the member does not hurt.

llvm-svn: 327380

6 years agoFix linux s390x build (pr36694)
Pavel Labath [Tue, 13 Mar 2018 09:46:00 +0000 (09:46 +0000)]
Fix linux s390x build (pr36694)

llvm-svn: 327379

6 years ago[ELF] - Implement INSERT BEFORE.
George Rimar [Tue, 13 Mar 2018 09:18:11 +0000 (09:18 +0000)]
[ELF] - Implement INSERT BEFORE.

This finishes PR35877.

INSERT BEFORE used similar to INSERT AFTER,
it inserts sections before the given target section.

Differential revision: https://reviews.llvm.org/D44380

llvm-svn: 327378

6 years ago[ELF] - Fix wrong "REQUIRES" in test.
George Rimar [Tue, 13 Mar 2018 08:50:36 +0000 (08:50 +0000)]
[ELF] - Fix wrong "REQUIRES" in test.

Its a follow up for r327374 to fix BB.

llvm-svn: 327377

6 years ago[ELF] - Restrict section offsets that exceeds file size.
George Rimar [Tue, 13 Mar 2018 08:47:17 +0000 (08:47 +0000)]
[ELF] - Restrict section offsets that exceeds file size.

This is part of PR36515.

With some linkerscripts it is possible to get file offset overlaps
and overflows. Currently LLD checks overlaps in checkNoOverlappingSections().
And also we allow broken output with --no-inhibit-exec.
Problem is that sometimes final offset of sections is completely broken
and we calculate output file size wrong and might crash.

Patch implements check to verify that there is no output section
which offset exceeds file size.

Differential revision: https://reviews.llvm.org/D43819

llvm-svn: 327376

6 years ago[CodeGenPrepare] Respect endianness in splitMergedValStore.
Jonas Paulsson [Tue, 13 Mar 2018 08:36:20 +0000 (08:36 +0000)]
[CodeGenPrepare]  Respect endianness in splitMergedValStore.

splitMergedValStore will split a store into two if target prefers this, or if
-force-split-store is passed.

This patch adds the missing handling for endianness in this function along
with a test case.

Review: Eli Friedman
https://reviews.llvm.org/D44396

llvm-svn: 327375

6 years ago[ELF] - Drop special flags for empty output sections.
George Rimar [Tue, 13 Mar 2018 08:32:56 +0000 (08:32 +0000)]
[ELF] - Drop special flags for empty output sections.

This fixes PR36598.

LLD currently crashes when we have empty output section
with SHF_LINK_ORDER flag. This might happen if we place an
empty synthetic section in the linker script, but keep output
section alive with the use of additional symbol, for example.

The patch fixes the issue by dropping all special flags
for empty sections.

Differential revision: https://reviews.llvm.org/D44376

llvm-svn: 327374

6 years ago[SCEV][NFC] Smarter implementation of isAvailableAtLoopEntry
Max Kazantsev [Tue, 13 Mar 2018 07:46:06 +0000 (07:46 +0000)]
[SCEV][NFC] Smarter implementation of isAvailableAtLoopEntry

isAvailableAtLoopEntry duplicates logic of `properlyDominates` after checking invariance.
This patch replaces this logic with invocation of this method which is more profitable
because it supports caching.

Differential Revision: https://reviews.llvm.org/D43997

llvm-svn: 327373

6 years ago[MergeICmps] Make sure that the comparison only has one use.
Clement Courbet [Tue, 13 Mar 2018 07:05:55 +0000 (07:05 +0000)]
[MergeICmps] Make sure that the comparison only has one use.

Summary: Fixes PR36557.

Reviewers: trentxintong, spatel

Subscribers: mstorsjo, llvm-commits

Differential Revision: https://reviews.llvm.org/D44083

llvm-svn: 327372

6 years agobpf: Enhance debug information for peephole optimization passes
Yonghong Song [Tue, 13 Mar 2018 06:47:07 +0000 (06:47 +0000)]
bpf: Enhance debug information for peephole optimization passes

Add more debug information for peephole optimization passes.

These would only be enabled for debug version binary and could help
analyzing why some optimization opportunities were missed.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327371

6 years agobpf: New post-RA peephole optimization pass to eliminate bad RA codegen
Yonghong Song [Tue, 13 Mar 2018 06:47:06 +0000 (06:47 +0000)]
bpf: New post-RA peephole optimization pass to eliminate bad RA codegen

This new pass eliminate identical move:

  MOV rA, rA

This is particularly possible to happen when sub-register support
enabled. The special type cast insn MOV_32_64 involves different
register class on src (i32) and dst (i64), RA could generate useless
instruction due to this.

This pass also could serve as the bast for further post-RA optimization.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327370

6 years agobpf: Don't expand BSWAP on i32, promote it
Yonghong Song [Tue, 13 Mar 2018 06:47:05 +0000 (06:47 +0000)]
bpf: Don't expand BSWAP on i32, promote it

Currently, there is no ALU32 bswap support in eBPF ISA.

BSWAP on i32 was set to EXPAND which would need about eight instructions
for single BSWAP.

It would be more efficient to promote it to i64, then doing BSWAP on i64.
For eBPF programs, most of the promotion are zero extensions which are
likely be elimiated later by peephole optimizations.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327369

6 years agobpf: Support subregister definition check on PHI node
Yonghong Song [Tue, 13 Mar 2018 06:47:04 +0000 (06:47 +0000)]
bpf: Support subregister definition check on PHI node

This patch relax the subregister definition check on Phi node.
Previously, we just cancel the optimizatoin when the definition is Phi
node while actually we could further check the definitions of incoming
parameters of PHI node.

This helps catch more elimination opportunities.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327368

6 years agobpf: Extends zero extension elimination beyond comparison instructions
Yonghong Song [Tue, 13 Mar 2018 06:47:03 +0000 (06:47 +0000)]
bpf: Extends zero extension elimination beyond comparison instructions

The current zero extension elimination was restricted to operands of
comparison. It actually could be extended to more cases.

For example:

  int *inc_p (int *p, unsigned a)
  {
    return p + a;
  }

'a' will be promoted to i64 during addition, and the zero extension could
be eliminated as well.

For the elimination optimization, it should be much better to start
recognizing the candidate sequence from the SRL instruction instead of J*
instructions.

This patch makes it an generic zero extension elimination pass instead of
one restricted with comparison.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327367

6 years agobpf: J*_RR should check both operands
Yonghong Song [Tue, 13 Mar 2018 06:47:02 +0000 (06:47 +0000)]
bpf: J*_RR should check both operands

There is a mistake in current code that we "break" out the optimization
when the first operand of J*_RR doesn't qualify the elimination. This
caused some elimination opportunities missed, for example the one in the
testcase.

The code should just fall through to handle the second operand.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327366

6 years agobpf: Tighten subregister definition check
Yonghong Song [Tue, 13 Mar 2018 06:47:00 +0000 (06:47 +0000)]
bpf: Tighten subregister definition check

The current subregister definition check stops after the MOV_32_64
instruction.

This means we are thinking all the following instruction sequences
are safe to be eliminated:

  MOV_32_64 rB, wA
  SLL_ri    rB, rB, 32
  SRL_ri    rB, rB, 32

However, this is *not* true. The source subregister wA of MOV_32_64 could
come from a implicit truncation of 64-bit register in which case the high
bits of the 64-bit register is not zeroed, therefore we can't eliminate
above sequence.

For example, for i32_val, we shouldn't do the elimination:

  long long bar ();

  int foo (int b, int c)
  {
    unsigned int i32_val = (unsigned int) bar();

    if (i32_val < 10)
      return b;
    else
      return c;
  }

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327365

6 years agobpf: Add more check directives in peephole testcase
Yonghong Song [Tue, 13 Mar 2018 06:46:59 +0000 (06:46 +0000)]
bpf: Add more check directives in peephole testcase

Improve the test accuracy by adding more check directives.

Shifts are expected to be eliminated for zero extension but not for signed
extension.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
llvm-svn: 327364

6 years agoRevert [SCEV] Fix isKnownPredicate
Serguei Katkov [Tue, 13 Mar 2018 06:36:00 +0000 (06:36 +0000)]
Revert [SCEV] Fix isKnownPredicate

It is a revert of rL327362 which causes build bot failures with assert like

Assertion `isAvailableAtLoopEntry(RHS, L) && "RHS is not available at Loop Entry"' failed.

llvm-svn: 327363

6 years ago[SCEV] Fix isKnownPredicate
Serguei Katkov [Tue, 13 Mar 2018 06:10:27 +0000 (06:10 +0000)]
[SCEV] Fix isKnownPredicate

IsKnownPredicate is updated to implement the following algorithm
proposed by @sanjoy and @mkazantsev :
isKnownPredicate(Pred, LHS, RHS) {
  Collect set S all loops on which either LHS or RHS depend.
  If S is non-empty
    a. Let PD be the element of S which is dominated by all other elements of S
    b. Let E(LHS) be value of LHS on entry of PD.
       To get E(LHS), we should just take LHS and replace all AddRecs that
       are attached to PD on with their entry values.
       Define E(RHS) in the same way.
    c. Let B(LHS) be value of L on backedge of PD.
       To get B(LHS), we should just take LHS and replace all AddRecs that
       are attached to PD on with their backedge values.
       Define B(RHS) in the same way.
    d. Note that E(LHS) and E(RHS) are automatically available on entry of PD,
       so we can assert on that.
    e. Return true if isLoopEntryGuardedByCond(Pred, E(LHS), E(RHS)) &&
                      isLoopBackedgeGuardedByCond(Pred, B(LHS), B(RHS))
Return true if Pred, L, R is known from ranges, splitting etc.
}
This is follow-up for https://reviews.llvm.org/D42417.

Reviewers: sanjoy, mkazantsev, reames
Reviewed By: sanjoy, mkazantsev
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D43507

llvm-svn: 327362

6 years ago[polly] Change std::sort to llvm::sort in response to r327219
Mandeep Singh Grang [Tue, 13 Mar 2018 05:25:23 +0000 (05:25 +0000)]
[polly] Change std::sort to llvm::sort in response to r327219

Summary:
r327219 added wrappers to std::sort which randomly shuffle the container before sorting.
This will help in uncovering non-determinism caused due to undefined sorting
order of objects having the same key.

To make use of that infrastructure we need to invoke llvm::sort instead of std::sort.

Reviewers: grosser, efriedma, jdoerfert, bollu, sebpop

Reviewed By: sebpop

Subscribers: sebpop, mehdi_amini, llvm-commits, pollydev

Tags: #polly

Differential Revision: https://reviews.llvm.org/D44361

llvm-svn: 327361

6 years agoReland r327041: [ThinLTO] Keep available_externally symbols live
Vlad Tsyrklevich [Tue, 13 Mar 2018 05:08:48 +0000 (05:08 +0000)]
Reland r327041: [ThinLTO] Keep available_externally symbols live

Summary:
This change fixes PR36483. The bug was originally introduced by a change
that marked non-prevailing symbols dead. This broke LowerTypeTests
handling of available_externally functions, which are non-prevailing.
LowerTypeTests uses liveness information to avoid emitting thunks for
unused functions.

Marking available_externally functions dead is incorrect, the functions
are used though the function definitions are not. This change keeps them
live, and lets the EliminateAvailableExternally/GlobalDCE passes remove
them later instead.

(Reland with a suspected fix for a unit test failure I haven't been able
to reproduce locally)

Reviewers: pcc, tejohnson

Reviewed By: tejohnson

Subscribers: grimar, mehdi_amini, inglorion, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D43690

llvm-svn: 327360

6 years ago[LTO] Return proper error object rather than null LTOModule
Adam Nemet [Tue, 13 Mar 2018 04:37:01 +0000 (04:37 +0000)]
[LTO] Return proper error object rather than null LTOModule

This caused a crash in LTOModule::createInLocalContext.

rdar://37926841

llvm-svn: 327359

6 years ago[ThinLTO] Add funtions in callees metadata to CallGraphEdges
Taewook Oh [Tue, 13 Mar 2018 04:26:58 +0000 (04:26 +0000)]
[ThinLTO] Add funtions in callees metadata to CallGraphEdges

Summary:
If there's a callees metadata attached to the indirect call instruction, add CallGraphEdges to the callees mentioned in the metadata when computing FunctionSummary.

* Why this is necessary:
Consider following code example:
```
(foo.c)
static int f1(int x) {...}
static int f2(int x);
static int (*fptr)(int) = f2;
static int f2(int x) {
  if (x) fptr=f1; return f1(x);
}
int foo(int x) {
  (*fptr)(x); // !callees metadata of !{i32 (i32)* @f1, i32 (i32)* @f2} would be attached to this call.
}

(bar.c)
int bar(int x) {
  return foo(x);
}
```

At LTO time when `foo.o` is imported into `bar.o`, function `foo` might be inlined into `bar` and PGO-guided indirect call promotion will run after that. If the profile data tells that the promotion of `@f1` or `@f2` is beneficial, the optimizer will check if the "promoted" `@f1` or `@f2` (such as `@f1.llvm.0` or `@f2.llvm.0`) is available. Without this patch, importing `!callees` metadata would only add promoted declarations of `@f1` and `@f2` to the `bar.o`, but still the optimizer will assume that the function is available and perform the promotion. The result of that is link failure with `undefined reference to @f1.llvm.0`.

This patch fixes this problem by adding callees in the `!callees` metadata to CallGraphEdges so that their definition would be properly imported into.

One may ask that there already is a logic to add indirect call promotion targets to be added to CallGraphEdges. However, if profile data says "indirect call promotion is only beneficial under a certain inline context", the logic wouldn't work. In the code example above, if profile data is like
```
bar:1000000:100000
  1:100000
    1: foo:100000
        1: 100000 f1:100000
```
, Computing FunctionSummary for `foo.o` wouldn't add `foo->f1` to CallGraphEdges. (Also, it is at least "possible" that one can provide profile data to only link step but not to compilation step).

Reviewers: tejohnson, mehdi_amini, pcc

Reviewed By: tejohnson

Subscribers: inglorion, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D44399

llvm-svn: 327358

6 years agoUse PLT relocations in test.
Rafael Espindola [Tue, 13 Mar 2018 01:41:49 +0000 (01:41 +0000)]
Use PLT relocations in test.

Currently lld creates plain plt entries when a R_386_PC32 resolves to
a symbol in a shared library. That is a bug (PR36678). Don't depend on
that behavior on this test.

llvm-svn: 327357

6 years ago[ExpressionParser] Fix crash when evaluating invalid expresssions.
Davide Italiano [Tue, 13 Mar 2018 01:40:00 +0000 (01:40 +0000)]
[ExpressionParser] Fix crash when evaluating invalid expresssions.

Typical example, illformed comparisons (operator== where LHS and
RHS are not compatible). If a symbol matched `operator==` in any
of the object files lldb inserted a generic function declaration
in the ASTContext on which Sema operates. Maintaining the AST
context invariants is fairly tricky and sometimes resulted in
crashes inside clang (or assertions hit).

The real reason why this feature exists in the first place is
that of allowing users to do something like:
(lldb) call printf("patatino")

even if the debug informations for printf() is not available.
Eventually, we might reconsider this feature in its
entirety, but for now we can't remove it as it would break
a bunch of users. Instead, try to limit it to non-C++ symbols,
where getting the invariants right is hopefully easier.

Now you can't do in lldb anymore
(lldb) call _Zsomethingsomething(1,2,3)

but that doesn't seem to be such a big loss.

<rdar://problem/35645893>

llvm-svn: 327356

6 years ago[LegalizeTypes] In SplitVecOp_TruncateHelper, use GetSplitVector on the input instead...
Craig Topper [Tue, 13 Mar 2018 01:17:40 +0000 (01:17 +0000)]
[LegalizeTypes] In SplitVecOp_TruncateHelper, use GetSplitVector on the input instead of creating new extract_subvectors.

llvm-svn: 327355

6 years agoAdd missing "env" so that test added in r327322 passes on Windows bots.
Douglas Yung [Tue, 13 Mar 2018 00:41:44 +0000 (00:41 +0000)]
Add missing "env" so that test added in r327322 passes on Windows bots.

llvm-svn: 327354

6 years ago[lld] Fix comdat tests
Alexander Shaposhnikov [Tue, 13 Mar 2018 00:07:53 +0000 (00:07 +0000)]
[lld] Fix comdat tests

This diff adjusts the comdat tests after changing the format
of llvm-readobj output for .group sections.

llvm-svn: 327353

6 years ago[CFG] [analyzer] Don't add construction context to a return-by-reference call.
Artem Dergachev [Mon, 12 Mar 2018 23:52:36 +0000 (23:52 +0000)]
[CFG] [analyzer] Don't add construction context to a return-by-reference call.

Call expressions that return objects by an lvalue reference or an rvalue
reference have a value type in the AST but wear an auxiliary flag of being an
lvalue or an xvalue respectively.

Use the helper method for obtaining the actual return type of the function.

Fixes a crash.

Differential Revision: https://reviews.llvm.org/D44273

llvm-svn: 327352

6 years agoObjCARC: address review comments from majnemer
Saleem Abdulrasool [Mon, 12 Mar 2018 23:48:20 +0000 (23:48 +0000)]
ObjCARC: address review comments from majnemer

I forgot to incorporate these comments into the original revision.  This
is just code cleanup addressing the feedback, NFC.

llvm-svn: 327351

6 years ago[lit] `llvm-mc` is now a dependency to run tests.
Davide Italiano [Mon, 12 Mar 2018 23:42:37 +0000 (23:42 +0000)]
[lit] `llvm-mc` is now a dependency to run tests.

llvm-svn: 327350

6 years ago[llvm] Fix mc tests
Alexander Shaposhnikov [Mon, 12 Mar 2018 23:36:25 +0000 (23:36 +0000)]
[llvm] Fix mc tests

This diff adjusts the mc tests after changing the format
of llvm-readobj output for .group sections.

llvm-svn: 327349

6 years ago[analyzer] Support temporaries conjured by conservatively evaluated functions.
Artem Dergachev [Mon, 12 Mar 2018 23:36:12 +0000 (23:36 +0000)]
[analyzer] Support temporaries conjured by conservatively evaluated functions.

Properly perform destruction and lifetime extension of such temporaries.

C++ object-type return values of conservatively evaluated functions are now
represented as compound values of well-defined temporary object regions. The
function creates a region that represents the temporary object and will later
be used for destruction or materialization, invalidates it, and returns the
invalidated compound value of the object.

Differential Revision: https://reviews.llvm.org/D44131

llvm-svn: 327348

6 years ago[analyzer] NFC: Move the code for setting temp object lifetime into method.
Artem Dergachev [Mon, 12 Mar 2018 23:27:52 +0000 (23:27 +0000)]
[analyzer] NFC: Move the code for setting temp object lifetime into method.

Differential Revision: https://reviews.llvm.org/D44129

llvm-svn: 327347

6 years agoRevert "Reland "[clang-doc] Setup clang-doc frontend framework""
Julie Hockett [Mon, 12 Mar 2018 23:23:24 +0000 (23:23 +0000)]
Revert "Reland "[clang-doc] Setup clang-doc frontend framework""

This reverts commit r327295 since it was causing the Windows bots to
fail.

llvm-svn: 327346

6 years ago[analyzer] Destroy and lifetime-extend inlined function return values properly.
Artem Dergachev [Mon, 12 Mar 2018 23:22:35 +0000 (23:22 +0000)]
[analyzer] Destroy and lifetime-extend inlined function return values properly.

This patch uses the newly added CFGCXXRecordTypedCall element at the call site
of the caller to construct the return value within the callee directly into the
caller's stack frame. This way it is also capable of populating the temporary
destructor and lifetime extension maps for the temporary, which allows
temporary destructors and lifetime extension to work correctly.

This patch does not affect temporaries that were returned from conservatively
evaluated functions.

Differential Revision: https://reviews.llvm.org/D44124

llvm-svn: 327345

6 years ago[clangd] Remove Tagged and some related APIs from ClangdServer.
Sam McCall [Mon, 12 Mar 2018 23:22:35 +0000 (23:22 +0000)]
[clangd] Remove Tagged and some related APIs from ClangdServer.

Context can do what Tagged was intended to support (snapshot filesystems),
and less intrusively.
getTaggedFileSystem() no longer needs a filename.

Cleanups while here:
 - code-complete now returns errors as Expected, like other functions
 - added an alias Callback<T> for the usual callback function type

llvm-svn: 327344

6 years ago[CFG] [analyzer] Add construction context to C++ return-by-value call elements.
Artem Dergachev [Mon, 12 Mar 2018 23:12:40 +0000 (23:12 +0000)]
[CFG] [analyzer] Add construction context to C++ return-by-value call elements.

This patch adds a new CFGStmt sub-class, CFGCXXRecordTypedCall, which replaces
the regular CFGStmt for the respective CallExpr whenever the CFG has additional
information to provide regarding the lifetime of the returned value.

This additional call site information is represented by a ConstructionContext
(which was previously used for CFGConstructor elements) that provides references
to CXXBindTemporaryExpr and MaterializeTemporaryExpr that surround the call.

This corresponds to the common C++ calling convention solution of providing
the target address for constructing the return value as an auxiliary implicit
argument during function call.

One of the use cases for such extra context at the call site would be to perform
any sort of inter-procedural analysis over the CFG that involves functions
returning objects by value. In this case the elidable constructor at the return
site would construct the object explained by the context at the call site, and
its lifetime would also be managed by the caller, not the callee.

The extra context would also be useful for properly handling the return-value
temporary at the call site, even if the callee is not being analyzed
inter-procedurally.

Differential Revision: https://reviews.llvm.org/D44120

llvm-svn: 327343

6 years ago[InstCombine] add test to show fmul transform creates extra fdiv; NFC
Sanjay Patel [Mon, 12 Mar 2018 23:10:08 +0000 (23:10 +0000)]
[InstCombine] add test to show fmul transform creates extra fdiv; NFC

Also, move fmul reassociation tests to the same file as other fmul transforms.

llvm-svn: 327342

6 years ago[llvm-readobj] Extend the output of -elf-section-groups
Alexander Shaposhnikov [Mon, 12 Mar 2018 22:40:09 +0000 (22:40 +0000)]
[llvm-readobj] Extend the output of -elf-section-groups

This diff extends the output of -elf-section-groups
(llvm style, gnu style is unchanged since it's meant to be
compatible with binutils readelf) with sh_link and sh_info.
This change will enable us to use llvm-readobj -elf-section-groups
for testing llvm-objcopy's support for .group sections.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D44280

llvm-svn: 327341

6 years agoBlockExtractor: Don’t delete functions directly
Volkan Keles [Mon, 12 Mar 2018 22:28:18 +0000 (22:28 +0000)]
BlockExtractor: Don’t delete functions directly

Blocks may have function calls, so don’t erase functions
directly to avoid erasing a function that has a user.

llvm-svn: 327340

6 years ago[PatternMatch] enhance m_NaN() to ignore undef elements in vectors
Sanjay Patel [Mon, 12 Mar 2018 22:18:47 +0000 (22:18 +0000)]
[PatternMatch] enhance m_NaN() to ignore undef elements in vectors

llvm-svn: 327339

6 years ago[Sanitizers] Add more standard compliant posix_memalign implementation for LSan.
Alex Shlyapnikov [Mon, 12 Mar 2018 21:59:06 +0000 (21:59 +0000)]
[Sanitizers] Add more standard compliant posix_memalign implementation for LSan.

Summary:
Add more standard compliant posix_memalign implementation for LSan and
use corresponding sanitizer's posix_memalign implenetations in allocation
wrappers on Mac.

Reviewers: eugenis, fjricci

Subscribers: kubamracek, delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D44335

llvm-svn: 327338

6 years ago[asan] poison_heap=0 should not disable __asan_handle_no_return.
Evgeniy Stepanov [Mon, 12 Mar 2018 21:46:55 +0000 (21:46 +0000)]
[asan] poison_heap=0 should not disable __asan_handle_no_return.

Reviewers: kcc, alekseyshl, vitalybuka

Subscribers: kubamracek, llvm-commits

Differential Revision: https://reviews.llvm.org/D44339

llvm-svn: 327337

6 years agoObjCARC: teach the cloner about funclets
Saleem Abdulrasool [Mon, 12 Mar 2018 21:46:09 +0000 (21:46 +0000)]
ObjCARC: teach the cloner about funclets

In the case that the CallInst that is being moved has an associated
operand bundle which is a funclet, the move will construct an invalid
instruction.  The new site will have a different token and needs to be
reassociated with the new instruction.

Unfortunately, there is no way to alter the bundle after the
construction of the instruction.  Replace the call instruction cloning
with a custom helper to clone the instruction and reassociate the
funclet token.

llvm-svn: 327336

6 years ago[InstSimplify] add fcmp tests for constant NaN vector with undef elt; NFC
Sanjay Patel [Mon, 12 Mar 2018 21:44:17 +0000 (21:44 +0000)]
[InstSimplify] add fcmp tests for constant NaN vector with undef elt; NFC

llvm-svn: 327335

6 years agoRe-land "[Sema] Make getCurFunction() return null outside function parsing"
Reid Kleckner [Mon, 12 Mar 2018 21:43:02 +0000 (21:43 +0000)]
Re-land "[Sema] Make getCurFunction() return null outside function parsing"

This relands r326965.

There was a null dereference in typo correction that was triggered in
Sema/diagnose_if.c. We are not always in a function scope when doing
typo correction. The fix is to add a null check.

LLVM's optimizer made it hard to find this bug. I wrote it up in a
not-very-well-editted blog post here:
http://qinsb.blogspot.com/2018/03/ub-will-delete-your-null-checks.html

llvm-svn: 327334

6 years ago[docs] Adding clang-doc to CTE toctree to fix docs build error
Julie Hockett [Mon, 12 Mar 2018 21:39:01 +0000 (21:39 +0000)]
[docs] Adding clang-doc to CTE toctree to fix docs build error

llvm-svn: 327333