platform/upstream/llvm.git
6 years ago[X86][3DNow] Add 3DNow! instruction itinerary and scheduling classes
Simon Pilgrim [Sun, 26 Nov 2017 20:50:29 +0000 (20:50 +0000)]
[X86][3DNow] Add 3DNow! instruction itinerary and scheduling classes

llvm-svn: 319005

6 years agoPrevent Thread Exited/Joined events race
Kamil Rytarowski [Sun, 26 Nov 2017 20:20:42 +0000 (20:20 +0000)]
Prevent Thread Exited/Joined events race

Summary:
Add atomic verification to ensure that Thread is Joined after marking it
Finished.

It is required for NetBSD in order to prevent Thread Exited/Joined race,
that may occur when native system libpthread(3) cannot be reliably traced
in a way to guarantee that the mentioned events happen one after another.

This change fixes at least TSan and LSan on NetBSD.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, dvyukov, vitalybuka

Reviewed By: dvyukov

Subscribers: llvm-commits, kubamracek, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D40294

llvm-svn: 319004

6 years ago[X86][SSE] Add SSE42 tests to the clear upper tests
Simon Pilgrim [Sun, 26 Nov 2017 20:03:53 +0000 (20:03 +0000)]
[X86][SSE] Add SSE42 tests to the clear upper tests

llvm-svn: 319003

6 years agoDetermine the attribute subject for diagnostics based on declarative information...
Aaron Ballman [Sun, 26 Nov 2017 20:01:12 +0000 (20:01 +0000)]
Determine the attribute subject for diagnostics based on declarative information in DeclNodes.td. This greatly reduces the number of enumerated values used for more complex diagnostics; these are now only required when the "attribute only applies to" diagnostic needs to be generated manually as part of semantic processing.

This also clarifies some terminology used by the diagnostic (methods -> Objective-C methods, fields -> non-static data members, etc).

Many of the tests needed to be updated in multiple places for the diagnostic wording tweaks. The first instance of the diagnostic for that attribute is fully specified and subsequent instances cut off the complete list (to make it easier if additional subjects are added in the future for the attribute).

llvm-svn: 319002

6 years ago[utils][mips] Add support for mips for update_llc_checks.py
Simon Dardis [Sun, 26 Nov 2017 19:22:44 +0000 (19:22 +0000)]
[utils][mips] Add support for mips for update_llc_checks.py

Add support for mips, particularly skipping the matching of .frame, .(f)mask
and LLVM's usage of the .set no(reorder|at|macro) directives.

Reviewers: spatel

Differential Revision: https://reviews.llvm.org/D40268

llvm-svn: 319001

6 years ago[X86][3DNow] Remove unused I3DNow_binop_rm/I3DNow_conv_rm templates. NFCI
Simon Pilgrim [Sun, 26 Nov 2017 19:22:37 +0000 (19:22 +0000)]
[X86][3DNow] Remove unused I3DNow_binop_rm/I3DNow_conv_rm templates. NFCI

llvm-svn: 319000

6 years ago[X86][MMX] Add IIC_MMX_MOVMSK instruction itinerary class
Simon Pilgrim [Sun, 26 Nov 2017 17:56:07 +0000 (17:56 +0000)]
[X86][MMX] Add IIC_MMX_MOVMSK instruction itinerary class

llvm-svn: 318999

6 years ago[ASTImporter] Support TypeTraitExpr
Aleksei Sidorin [Sun, 26 Nov 2017 17:04:06 +0000 (17:04 +0000)]
[ASTImporter] Support TypeTraitExpr

Patch by Takafumi Kubota!

Differential Revision: https://reviews.llvm.org/D39722

llvm-svn: 318998

6 years ago[SCEV] Adding a check on outgoing branches of a terminator instr for SCEVBackedgeCond...
Jatin Bhateja [Sun, 26 Nov 2017 15:08:41 +0000 (15:08 +0000)]
[SCEV] Adding a check on outgoing branches of a terminator instr for SCEVBackedgeConditionFolder, NFC.

Summary:
For a given loop, getLoopLatch returns a non-null value
when a loop has only one latch block. In the modified
context adding an assertion to check that both the outgoing branches of
a terminator instruction (of latch) does not target same header.
+
few minor code reorganization.

Reviewers: jbhateja

Reviewed By: jbhateja

Subscribers: sanjoy

Differential Revision: https://reviews.llvm.org/D40460

llvm-svn: 318997

6 years agoControl-Flow Enforcement Technology - Shadow Stack support (LLVM side)
Oren Ben Simhon [Sun, 26 Nov 2017 13:02:45 +0000 (13:02 +0000)]
Control-Flow Enforcement Technology - Shadow Stack support (LLVM side)

Shadow stack solution introduces a new stack for return addresses only.
The HW has a Shadow Stack Pointer (SSP) that points to the next return address.
If we return to a different address, an exception is triggered.
The shadow stack is managed using a series of intrinsics that are introduced in this patch as well as the new register (SSP).
The intrinsics are mapped to new instruction set that implements CET mechanism.

The patch also includes initial infrastructure support for IBT.

For more information, please see the following:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf

Differential Revision: https://reviews.llvm.org/D40223

Change-Id: I4daa1f27e88176be79a4ac3b4cd26a459e88fed4
llvm-svn: 318996

6 years agoControl-Flow Enforcement Technology - Shadow Stack and Indirect Branch Tracking suppo...
Oren Ben Simhon [Sun, 26 Nov 2017 12:34:54 +0000 (12:34 +0000)]
Control-Flow Enforcement Technology - Shadow Stack and Indirect Branch Tracking support (Clang side)

Shadow stack solution introduces a new stack for return addresses only.
The stack has a Shadow Stack Pointer (SSP) that points to the last address to which we expect to return.
If we return to a different address an exception is triggered.
This patch includes shadow stack intrinsics as well as the corresponding CET header.
It includes CET clang flags for shadow stack and Indirect Branch Tracking.

For more information, please see the following:
https://software.intel.com/sites/default/files/managed/4d/2a/control-flow-enforcement-technology-preview.pdf

Differential Revision: https://reviews.llvm.org/D40224

Change-Id: I79ad0925a028bbc94c8ecad75f6daa2f214171f1
llvm-svn: 318995

6 years agoDetect thread termination in LSan/NetBSD
Kamil Rytarowski [Sun, 26 Nov 2017 09:42:01 +0000 (09:42 +0000)]
Detect thread termination in LSan/NetBSD

Summary:
Stop using the Linux solution with pthread_key_create(3).
This approach does not work on NetBSD, because calling
the thread destructor is not the latest operation on a POSIX
thread entity.

Detect _lwp_exit(2) call as it is really the latest operation
called from a detaching POSIX thread.

The pthread_key_create(3) solution also cannot be used
in early libc/libpthread initialization on NetBSD as the
system libraries are not bootstrapped enough.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, vitalybuka, kcc, dvyukov

Reviewed By: dvyukov

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D40457

llvm-svn: 318994

6 years ago[x86][icelake]GFNI
Coby Tayree [Sun, 26 Nov 2017 09:36:41 +0000 (09:36 +0000)]
[x86][icelake]GFNI
galois field arithmetic (GF(2^8)) insns:
gf2p8affineinvqb
gf2p8affineqb
gf2p8mulb
Differential Revision: https://reviews.llvm.org/D40373

llvm-svn: 318993

6 years agoMore of P0600; marking allocation routines as [[nodiscard]]
Marshall Clow [Sun, 26 Nov 2017 02:55:38 +0000 (02:55 +0000)]
More of P0600; marking allocation routines as [[nodiscard]]

llvm-svn: 318992

6 years ago[SCEV] NFC : Removing unnecessary check on outgoing branches of a branch instr.
Jatin Bhateja [Sun, 26 Nov 2017 02:01:01 +0000 (02:01 +0000)]
[SCEV] NFC : Removing unnecessary check on outgoing branches of a branch instr.

Summary:
For a given loop, getLoopLatch returns a non-null value
when a loop has only one latch block. In the modified
context a check on both the outgoing branches of a terminator instruction (of latch) to same header is redundant.

Reviewers: jbhateja

Reviewed By: jbhateja

Subscribers: sanjoy

Differential Revision: https://reviews.llvm.org/D40460

llvm-svn: 318991

6 years agoFix copy/paste bug in test where we were putting a '3' into a vector<bool>. NFC.
Marshall Clow [Sun, 26 Nov 2017 00:39:59 +0000 (00:39 +0000)]
Fix copy/paste bug in test where we were putting a '3' into a vector<bool>. NFC.

llvm-svn: 318990

6 years agoFix installation of cxxabi.h through libc++.
Eric Fiselier [Sat, 25 Nov 2017 23:39:17 +0000 (23:39 +0000)]
Fix installation of cxxabi.h through libc++.

Previously, the install command for the cxxabi headers specified
the wrong component, and therefore they were not being included
in the install-cxx command.

This patch corrects the component name.

llvm-svn: 318989

6 years ago[MaximalStaticExpansion] Simplify this code a bit. NFCI.
Davide Italiano [Sat, 25 Nov 2017 23:01:31 +0000 (23:01 +0000)]
[MaximalStaticExpansion] Simplify this code a bit. NFCI.

llvm-svn: 318988

6 years agoRemove dead code
David Blaikie [Sat, 25 Nov 2017 20:06:04 +0000 (20:06 +0000)]
Remove dead code

(this header is not fully implemented (the out of line function
writeTypeRecordKind is called in an inline function but never
implemented - this fails to link under modular code generation) and not
included anywhere)

llvm-svn: 318987

6 years ago[X86] Remove GCCBuiltin from intrinsics that are no longer used by clang.
Craig Topper [Sat, 25 Nov 2017 20:00:37 +0000 (20:00 +0000)]
[X86] Remove GCCBuiltin from intrinsics that are no longer used by clang.

llvm-svn: 318986

6 years ago[X86] Use separate builtins for fma4 scalar intrinsics. Use negations to remove some...
Craig Topper [Sat, 25 Nov 2017 19:32:12 +0000 (19:32 +0000)]
[X86] Use separate builtins for fma4 scalar intrinsics. Use negations to remove some of the scalar fma3 builtins.

fma4 instructions zero the upper bits of the xmm register. fma3 instructions leave the bits unmodified. This requires separate builtins for the different semantics.

While we're cleaning up the scalar builtins this also removes the fma3 fmsub/fnmadd/fnmsub builtins by using negates in the header file.

llvm-svn: 318985

6 years ago[X86] Add separate intrinsics for scalar FMA4 instructions.
Craig Topper [Sat, 25 Nov 2017 18:32:43 +0000 (18:32 +0000)]
[X86] Add separate intrinsics for scalar FMA4 instructions.

Summary:
These instructions zero the non-scalar part of the lower 128-bits which makes them different than the FMA3 instructions which pass through the non-scalar part of the lower 128-bits.

I've only added fmadd because we should be able to derive all other variants using operand negation in the intrinsic header like we do for AVX512.

I think there are still some missed negate folding opportunities with the FMA4 instructions in light of this behavior difference that I hadn't noticed before.

I've split the tests so that we can use different intrinsics for scalar testing between the two. I just copied the tests split the RUN lines and changed out the scalar intrinsics.

fma4-fneg-combine.ll is a new test to make sure we negate the fma4 intrinsics correctly though there are a couple TODOs in it.

Reviewers: RKSimon, spatel

Reviewed By: RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39851

llvm-svn: 318984

6 years ago[X86] Don't report gather is legal on Skylake CPUs when AVX2/AVX512 is disabled....
Craig Topper [Sat, 25 Nov 2017 18:09:37 +0000 (18:09 +0000)]
[X86] Don't report gather is legal on Skylake CPUs when AVX2/AVX512 is disabled. Allow gather on SKX/CNL/ICL when AVX512 is disabled by using AVX2 instructions.

Summary:
This adds a new fast gather feature bit to cover all CPUs that support fast gather that we can use independent of whether the AVX512 feature is enabled. I'm only using this new bit to qualify AVX2 codegen. AVX512 is still implicitly assuming fast gather to keep tests working and to match the scatter behavior.

Test command lines have been added for these two cases.

Reviewers: magabari, delena, RKSimon, zvi

Reviewed By: RKSimon

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D40282

llvm-svn: 318983

6 years ago[SelectionDAG] Remove some dead code from vector scalaring
Craig Topper [Sat, 25 Nov 2017 17:59:00 +0000 (17:59 +0000)]
[SelectionDAG] Remove some dead code from vector scalaring

Summary:
Currently ScalarizeVecRes_SETCC checks for the result type being a vector and jumps to ScalarizeVecRes_VSETCC. But if we're scalarizing a vector result, aren't we guaranteed to be looking at a vector type?

This patch deletes the current ScalarizeVecRes_SETCC and renames  ScalarizeVecRes_VSETCC to ScalarizeVecRes_SETCC.

Reviewers: RKSimon, arsenm, eladcohen, zvi

Reviewed By: RKSimon

Subscribers: wdng, llvm-commits

Differential Revision: https://reviews.llvm.org/D40452

llvm-svn: 318982

6 years agoDue to changes for DWZ I would need to update those such as renaming it to
Jan Kratochvil [Sat, 25 Nov 2017 17:16:56 +0000 (17:16 +0000)]
Due to changes for DWZ I would need to update those such as renaming it to
SetFileOffset.

Differential revision: https://reviews.llvm.org/D40458

llvm-svn: 318981

6 years agoPlug dlerror() leak for swift_demangle
Kamil Rytarowski [Sat, 25 Nov 2017 16:47:20 +0000 (16:47 +0000)]
Plug dlerror() leak for swift_demangle

Summary:
InitializeSwiftDemangler() attempts to resolve the
swift_demangle symbol. If this is not available, we
observe dlerror message leak.

Caught on NetBSD/amd64 in TSan.

Sponsored by <The NetBSD Foundation>

Reviewers: joerg, kubamracek, vitalybuka, dvyukov, eugenis

Reviewed By: dvyukov

Subscribers: llvm-commits, #sanitizers

Tags: #sanitizers

Differential Revision: https://reviews.llvm.org/D40382

llvm-svn: 318980

6 years ago[analyzer] Teach RetainCountChecker about CoreMedia APIs
Devin Coughlin [Sat, 25 Nov 2017 14:57:42 +0000 (14:57 +0000)]
[analyzer] Teach RetainCountChecker about CoreMedia APIs

Teach the retain-count checker that CoreMedia reference types use
CoreFoundation-style reference counting. This enables the checker
to catch leaks and over releases of those types.

rdar://problem/33599757

llvm-svn: 318979

6 years agodoxygen: disable the html timestamp: this is breaking the reproducible build of openmp
Sylvestre Ledru [Sat, 25 Nov 2017 14:12:33 +0000 (14:12 +0000)]
doxygen: disable the html timestamp: this is breaking the reproducible build of openmp

llvm-svn: 318978

6 years agoAdd BTVER2 sched support for SHLD/SHRD.
Andrew V. Tischenko [Sat, 25 Nov 2017 10:46:53 +0000 (10:46 +0000)]
Add BTVER2 sched support for SHLD/SHRD.
Differential Revision: https://reviews.llvm.org/D40124

llvm-svn: 318977

6 years agoclang-format: [JS] do not collapse short classes.
Martin Probst [Sat, 25 Nov 2017 09:35:33 +0000 (09:35 +0000)]
clang-format: [JS] do not collapse short classes.

Summary:
clang-format does not collapse short records, interfaces, unions, etc.,
but fails to do so if the record is preceded by certain modifiers
(export, default, abstract, declare). This change skips over all
modifiers, and thus handles all record definitions uniformly.

Before:
    export class Foo { bar: string; }
    class Baz {
      bam: string;
    }

After:
    export class Foo {
      bar: string;
    }
    class Baz {
      bam: string;
    }

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40430

llvm-svn: 318976

6 years agoclang-format: [JS] handle semis in generic types.
Martin Probst [Sat, 25 Nov 2017 09:33:47 +0000 (09:33 +0000)]
clang-format: [JS] handle semis in generic types.

Summary:
TypeScript generic type arguments can contain object (literal) types,
which in turn can contain semicolons:

    const x: Array<{a: number; b: string;} = [];

Previously, clang-format would incorrectly categorize the braced list as
a block and terminate the line at the openening `{`, and then format the
entire expression badly.

With this change, clang-format recognizes `<` preceding a `{` as
introducing a type expression. In JS, `<` comparison with an object
literal can never be true, so the chance of introducing false positives
here is very low.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D40424

llvm-svn: 318975

6 years agoclang-format: [JS] handle `for` as object label.
Martin Probst [Sat, 25 Nov 2017 09:24:33 +0000 (09:24 +0000)]
clang-format: [JS] handle `for` as object label.

Summary: Previously, clang-format would fail formatting `{for: 1}`.

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40441

llvm-svn: 318974

6 years agoclang-format: [JS] disable ASI on decorators.
Martin Probst [Sat, 25 Nov 2017 09:19:42 +0000 (09:19 +0000)]
clang-format: [JS] disable ASI on decorators.

Summary:
Automatic Semicolon Insertion in clang-format tries to guess if a line
wrap should insert an implicit semicolong. The previous heuristic would
not trigger ASI if a token was immediately preceded by an `@` sign:

    function foo(@Bar  // <-- does not trigger due to preceding @
                baz) {}

However decorators can have arbitrary parameters:

    function foo(@Bar(param, param, param)  // <-- precending @ missed
                baz) {}

While it would be possible to precisely find the matching `@`, just
conversatively disabling ASI for the entire line is simpler, while also
not regressing ASI substatially.

Reviewers: djasper

Subscribers: klimek, cfe-commits

Differential Revision: https://reviews.llvm.org/D40410

llvm-svn: 318973

6 years ago[clang-tidy] Fix link error (http://llvm.org/PR35417).
Alexander Kornienko [Sat, 25 Nov 2017 08:52:42 +0000 (08:52 +0000)]
[clang-tidy] Fix link error (llvm.org/PR35417).

llvm-svn: 318972

6 years ago[clang-tidy] Actually fix header guard handling in scripts
Alexander Kornienko [Sat, 25 Nov 2017 08:49:04 +0000 (08:49 +0000)]
[clang-tidy] Actually fix header guard handling in scripts

llvm-svn: 318971

6 years ago[X86] Simplify some code in combineSetCC. NFCI
Craig Topper [Sat, 25 Nov 2017 07:20:24 +0000 (07:20 +0000)]
[X86] Simplify some code in combineSetCC. NFCI

Make the condition for doing a std::swap simpler so we don't have to repeat the full checks.

llvm-svn: 318970

6 years ago[X86] Qualify some vector specific code with VT.isVector(). NFCI
Craig Topper [Sat, 25 Nov 2017 07:20:23 +0000 (07:20 +0000)]
[X86] Qualify some vector specific code with VT.isVector(). NFCI

Other checks inside require a build_vector, but we this lets us stop earlier and makes the code more clear.

llvm-svn: 318969

6 years ago[X86] Support folding to andnps with SSE1 only.
Craig Topper [Sat, 25 Nov 2017 07:20:22 +0000 (07:20 +0000)]
[X86] Support folding to andnps with SSE1 only.

With SSE1 only, we emit FAND and FXOR nodes for v4f32.

llvm-svn: 318968

6 years ago[X86] Add some early DAG combines to turn v4i32 AND/OR/XOR into FAND/FOR/FXOR whe...
Craig Topper [Sat, 25 Nov 2017 07:20:21 +0000 (07:20 +0000)]
[X86] Add some early DAG combines to turn v4i32 AND/OR/XOR into FAND/FOR/FXOR whe only SSE1 is available.

v4i32 isn't a legal type with sse1 only and would end up getting scalarized otherwise.

This isn't completely ideal as it doesn't handle cases like v8i32 that would get split to v4i32. But it at least helps with code written using the clang intrinsic header.

llvm-svn: 318967

6 years agoRecommit r318963 "[APInt] Don't print debug messages from the APInt knuth division...
Craig Topper [Fri, 24 Nov 2017 20:29:04 +0000 (20:29 +0000)]
Recommit r318963 "[APInt] Don't print debug messages from the APInt knuth division algorithm by default"

The previous commit had the condition in the do/while backwards.

Debug builds currently print out low level details of the Knuth division algorithm when -debug is used. This information isn't useful in most cases and just adds noise to the log.

This adds a new preprocessor flag to enable the prints in the knuth division code in APInt.

Differential Revision: https://reviews.llvm.org/D40404

llvm-svn: 318966

6 years ago[X86] Prevent using X * rsqrt(X) to approximate sqrt when only sse1 is enabled.
Craig Topper [Fri, 24 Nov 2017 19:57:48 +0000 (19:57 +0000)]
[X86] Prevent using X * rsqrt(X) to approximate sqrt when only sse1 is enabled.

This optimization can occur after type legalization and emit a vselect with v4i32 type. But that type is not legal with sse1. This ultimately gets scalarized by the second type legalization that runs after vector op legalization, but that's really intended to handle the scalar types that might be introduced by legalizing vector ops.

For now just stop this from happening by disabling the optimization with sse1.

llvm-svn: 318965

6 years agoRevert 318963 "[APInt] Don't print debug messages from the APInt knuth division algor...
Craig Topper [Fri, 24 Nov 2017 19:32:34 +0000 (19:32 +0000)]
Revert 318963 "[APInt] Don't print debug messages from the APInt knuth division algorithm by default"

I seem to have botched the logic when switching to push_macro

llvm-svn: 318964

6 years ago[APInt] Don't print debug messages from the APInt knuth division algorithm by default
Craig Topper [Fri, 24 Nov 2017 19:13:24 +0000 (19:13 +0000)]
[APInt] Don't print debug messages from the APInt knuth division algorithm by default

Debug builds currently print out low level details of the Knuth division algorithm when -debug is used. This information isn't useful in most cases and just adds noise to the log.

This adds a new preprocessor flag to enable the prints in the knuth division code in APInt.

Differential Revision: https://reviews.llvm.org/D40404

llvm-svn: 318963

6 years agoDelete dead code.
Rafael Espindola [Fri, 24 Nov 2017 19:06:14 +0000 (19:06 +0000)]
Delete dead code.

The parent constructor is already setting the binding.

llvm-svn: 318962

6 years agoFix MSVC double-float implicit truncation warning. NFCI
Simon Pilgrim [Fri, 24 Nov 2017 18:18:42 +0000 (18:18 +0000)]
Fix MSVC double-float implicit truncation warning. NFCI

llvm-svn: 318961

6 years ago[clang-format] Deduplicate using declarations
Krasimir Georgiev [Fri, 24 Nov 2017 18:00:01 +0000 (18:00 +0000)]
[clang-format] Deduplicate using declarations

Summary: This deduplicated equivalent using declarations within a block.

Reviewers: bkramer

Reviewed By: bkramer

Subscribers: cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D40435

llvm-svn: 318960

6 years agoclang-format: [JS] do not break in ArrayType[].
Martin Probst [Fri, 24 Nov 2017 17:05:56 +0000 (17:05 +0000)]
clang-format: [JS] do not break in ArrayType[].

Summary:
Wrapping between the type name and the array type indicator creates
invalid syntax in TypeScript.

Before:
    const xIsALongIdent:
        YJustBarelyFitsLinex
            [];  // illegal syntax.

After:
    const xIsALongIdent:
        YJustBarelyFitsLinex[];

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40436

llvm-svn: 318959

6 years agoclang-format: [JS] do not wrap before yield.
Martin Probst [Fri, 24 Nov 2017 17:05:35 +0000 (17:05 +0000)]
clang-format: [JS] do not wrap before yield.

Summary: The same rules apply as for `return`.

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40431

llvm-svn: 318958

6 years agoclang-format: [JS] space between ! assert and in.
Martin Probst [Fri, 24 Nov 2017 17:04:40 +0000 (17:04 +0000)]
clang-format: [JS] space between ! assert and in.

Summary:
Before:
    x = y!in z;
After:
    x = y! in z;

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40433

llvm-svn: 318957

6 years ago[CodeGenPrepare] Check that erased sunken address are not reused
Simon Dardis [Fri, 24 Nov 2017 16:45:28 +0000 (16:45 +0000)]
[CodeGenPrepare] Check that erased sunken address are not reused

CodeGenPrepare sinks address computations from one basic block to another
and attempts to reuse address computations that have already been sunk. If
the same address computation appears twice with the first instance as an
operand of a load whose result is an operand to a simplifable select,
CodeGenPrepare simplifies the select and recursively erases the now dead
instructions. CodeGenPrepare then attempts to use the erased address
computation for the second load.

Fix this by erasing the cached address value if it has zero uses before
looking for the address value in the sunken address map.

This partially resolves PR35209.

Thanks to Alexander Richardson for reporting the issue!

This fixed version relands r318032 which was reverted in r318049 due to
sanitizer buildbot failures.

Reviewers: john.brawn

Differential Revision: https://reviews.llvm.org/D39841

llvm-svn: 318956

6 years ago[AMDGPU][MC][GFX9] Added v_interp_p2_f16 and v_interp_p2_legacy_f16
Dmitry Preobrazhensky [Fri, 24 Nov 2017 15:37:14 +0000 (15:37 +0000)]
[AMDGPU][MC][GFX9] Added v_interp_p2_f16 and v_interp_p2_legacy_f16

See bug 33629: https://bugs.llvm.org//show_bug.cgi?id=33629

Reviewers: artem.tamazov, SamWot, arsenm

Differential Revision: https://reviews.llvm.org/D39488

llvm-svn: 318955

6 years ago[AVR] Use the short form of 'clr <reg>'
Dylan McKay [Fri, 24 Nov 2017 15:36:43 +0000 (15:36 +0000)]
[AVR] Use the short form of 'clr <reg>'

r318895 made it so that the simpler instruction aliases are printed
rather than their expanded form.

llvm-svn: 318954

6 years agoMake helpers static. NFC.
Benjamin Kramer [Fri, 24 Nov 2017 14:55:41 +0000 (14:55 +0000)]
Make helpers static. NFC.

llvm-svn: 318953

6 years ago[SCEV] : Simplify loop to range-loop.NFC.
Javed Absar [Fri, 24 Nov 2017 14:35:38 +0000 (14:35 +0000)]
[SCEV] : Simplify loop to range-loop.NFC.

llvm-svn: 318952

6 years ago[clang-tidy] rename_check.py: fix header guard handling
Alexander Kornienko [Fri, 24 Nov 2017 14:33:06 +0000 (14:33 +0000)]
[clang-tidy] rename_check.py: fix header guard handling

llvm-svn: 318951

6 years ago[clang-tidy] Move a few more checks from misc to bugprone.
Alexander Kornienko [Fri, 24 Nov 2017 14:16:29 +0000 (14:16 +0000)]
[clang-tidy] Move a few more checks from misc to bugprone.

Summary:
clang_tidy/rename_check.py misc-assert-side-effect bugprone-assert-side-effect
clang_tidy/rename_check.py misc-bool-pointer-implicit-conversion bugprone-bool-pointer-implicit-conversion
clang_tidy/rename_check.py misc-fold-init-type bugprone-fold-init-type
clang_tidy/rename_check.py misc-forward-declaration-namespace bugprone-forward-declaration-namespace
clang_tidy/rename_check.py misc-inaccurate-erase bugprone-inaccurate-erase
clang_tidy/rename_check.py misc-move-forwarding-reference bugprone-move-forwarding-reference
clang_tidy/rename_check.py misc-multiple-statement-macro bugprone-multiple-statement-macro
clang_tidy/rename_check.py misc-use-after-move bugprone-use-after-move
clang_tidy/rename_check.py misc-virtual-near-miss bugprone-virtual-near-miss

Manually fixed a reference to UseAfterMoveCheck in the hicpp module.
Manually fixed header guards.

Reviewers: hokein

Reviewed By: hokein

Subscribers: nemanjai, mgorny, javed.absar, xazax.hun, kbarton, cfe-commits

Differential Revision: https://reviews.llvm.org/D40426

llvm-svn: 318950

6 years ago[CGP] Make optimizeMemoryInst able to combine more kinds of ExtAddrMode fields
John Brawn [Fri, 24 Nov 2017 14:10:45 +0000 (14:10 +0000)]
[CGP] Make optimizeMemoryInst able to combine more kinds of ExtAddrMode fields

This patch extends the recent work in optimizeMemoryInst to make it able to
combine more ExtAddrMode fields than just the BaseReg.

This fixes some benchmark regressions introduced by r309397, where GVN PRE is
hoisting a getelementptr such that it can no longer be combined into the
addressing mode of the load or store that uses it.

Differential Revision: https://reviews.llvm.org/D38133

llvm-svn: 318949

6 years ago[mips] Set microMIPS ASE flag
Aleksandar Beserminji [Fri, 24 Nov 2017 14:00:47 +0000 (14:00 +0000)]
[mips] Set microMIPS ASE flag

This patch fixes an issue where microMIPS ASE flag is not set
when a function has micromips attribute or when .set micromips
directive is used.

Differential Revision: https://reviews.llvm.org/D40316

llvm-svn: 318948

6 years ago[AMDGPU][MC][GFX9] Added support of 'inst_offset' modifier for compatibility with SP3
Dmitry Preobrazhensky [Fri, 24 Nov 2017 13:22:38 +0000 (13:22 +0000)]
[AMDGPU][MC][GFX9] Added support of 'inst_offset' modifier for compatibility with SP3

See bug 35329: https://bugs.llvm.org//show_bug.cgi?id=35329

Reviewers: arsenm, vpykhtin, artem.tamazov

Differential Revision: https://reviews.llvm.org/D40350

llvm-svn: 318947

6 years ago[clangd] Sort list of sources in CMakeLists.txt. NFC
Ilya Biryukov [Fri, 24 Nov 2017 13:13:41 +0000 (13:13 +0000)]
[clangd] Sort list of sources in CMakeLists.txt. NFC

llvm-svn: 318946

6 years agoAvoid copying the data of in-memory preambles
Ilya Biryukov [Fri, 24 Nov 2017 13:12:38 +0000 (13:12 +0000)]
Avoid copying the data of in-memory preambles

Summary: Preambles are large and we should avoid copying them.

Reviewers: bkramer, klimek

Reviewed By: bkramer

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D40302

llvm-svn: 318945

6 years ago[clangd] Ensure preamble outlives the AST
Ilya Biryukov [Fri, 24 Nov 2017 13:04:21 +0000 (13:04 +0000)]
[clangd] Ensure preamble outlives the AST

Summary:
In-memory preambles will not be copied anymore, so we need to make
sure they outlive the AST.

Reviewers: bkramer, sammccall, klimek

Reviewed By: sammccall

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D40301

llvm-svn: 318944

6 years ago[Tooling] Acknowledge that many CompilationDatabases don't support enumeration.
Sam McCall [Fri, 24 Nov 2017 12:13:55 +0000 (12:13 +0000)]
[Tooling] Acknowledge that many CompilationDatabases don't support enumeration.

Summary: Provide default implementations so that only getCompileCommands() is mandatory.

Reviewers: ioeric

Subscribers: cfe-commits, bkramer, klimek

Differential Revision: https://reviews.llvm.org/D40409

llvm-svn: 318943

6 years agoclang-format: [JS] handle destructuring `of`.
Martin Probst [Fri, 24 Nov 2017 10:48:25 +0000 (10:48 +0000)]
clang-format: [JS] handle destructuring `of`.

Summary:
Previously, clang-format would drop a space character between `of` and
then following (non-identifier) token if the preceding token was part of
a destructuring assignment (`}` or `]`).

Before:
    for (const [a, b] of[]) {}

After:
    for (const [a, b] of []) {}

Reviewers: djasper

Subscribers: klimek

Differential Revision: https://reviews.llvm.org/D40411

llvm-svn: 318942

6 years ago[clang-tidy] rename_check.py misc-dangling-handle bugprone-dangling-handle
Alexander Kornienko [Fri, 24 Nov 2017 09:52:05 +0000 (09:52 +0000)]
[clang-tidy] rename_check.py misc-dangling-handle bugprone-dangling-handle

Reviewers: hokein

Reviewed By: hokein

Subscribers: mgorny, xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D40389

llvm-svn: 318941

6 years ago[ELF] Rename .bss.rel.ro to .data.rel.ro.bss for some Linker Scripts.
Peter Smith [Fri, 24 Nov 2017 08:48:29 +0000 (08:48 +0000)]
[ELF] Rename .bss.rel.ro to .data.rel.ro.bss for some Linker Scripts.

LLD uses .bss.rel.ro for read-only copy relocations whereas the ld.bfd and
gold linkers use .data.rel.ro. In some linker scripts including ld.bfd's
internal linker script, the relro sections are placed sequentially assuming
.data.rel.ro is used. LLD's use of .bss.rel.ro means that the copy
relocations get matched into the .bss section causing the relro sections to
be non-contiguous.

This change checks for a .data.rel.ro OutputSection when a linker script
with the SECTIONS command is used. The section will match in the
.data.rel.ro output section and will maintain contiguous relro.

Differential Revision: https://reviews.llvm.org/D40365

Fixes PR35265

llvm-svn: 318940

6 years ago[ELF] Make tests with undefined symbols more explicit.
Igor Kudrin [Fri, 24 Nov 2017 06:42:32 +0000 (06:42 +0000)]
[ELF] Make tests with undefined symbols more explicit.

Differential Revision: https://reviews.llvm.org/D40253

llvm-svn: 318939

6 years agoUse lambdas to store lazy-evaluated .dynamic entries.
Rui Ueyama [Fri, 24 Nov 2017 02:15:51 +0000 (02:15 +0000)]
Use lambdas to store lazy-evaluated .dynamic entries.

Differential Revision: https://reviews.llvm.org/D40338

llvm-svn: 318938

6 years agoMake a test stricter.
Rafael Espindola [Thu, 23 Nov 2017 23:40:33 +0000 (23:40 +0000)]
Make a test stricter.

It now has a DT_NEEDED that could be removed by --gc-sections and one
that cannot. Without this all tests would pass if --gc-sections just
removed all DT_NEEDED.

llvm-svn: 318937

6 years ago[YAMLParser] Fix unused variable warning.
Benjamin Kramer [Thu, 23 Nov 2017 21:07:11 +0000 (21:07 +0000)]
[YAMLParser] Fix unused variable warning.

llvm-svn: 318936

6 years ago[YAMLParser] Don't crash on null keys in KeyValueNodes.
Benjamin Kramer [Thu, 23 Nov 2017 20:57:20 +0000 (20:57 +0000)]
[YAMLParser] Don't crash on null keys in KeyValueNodes.

Found by clangd-fuzzer!

llvm-svn: 318935

6 years ago[X86] Don't invert NewCC variable while processing the jcc/setcc/cmovcc instructions...
Craig Topper [Thu, 23 Nov 2017 19:25:45 +0000 (19:25 +0000)]
[X86] Don't invert NewCC variable while processing the jcc/setcc/cmovcc instructions in optimizeCompareInstr.

The NewCC variable is calculated outside of the loop that processes jcc/setcc/cmovcc instructions. If we invert it during the loop it can cause an incorrect value to be used by a later iteration. Instead only read it during the loop and use a new variable to store the possibly inverted value.

Fixes PR35399.

llvm-svn: 318934

6 years ago[X86] Teach isel that X86ISD::CMPM_RND zeros the upper bits of the mask register.
Craig Topper [Thu, 23 Nov 2017 18:41:21 +0000 (18:41 +0000)]
[X86] Teach isel that X86ISD::CMPM_RND zeros the upper bits of the mask register.

llvm-svn: 318933

6 years ago[X86] Remove some unneeded opcodes from getVectorMaskingNode. NFC
Craig Topper [Thu, 23 Nov 2017 18:41:20 +0000 (18:41 +0000)]
[X86] Remove some unneeded opcodes from getVectorMaskingNode. NFC

We never reach here with these opcodes.

llvm-svn: 318932

6 years ago[X86] Add X86ISD::CMPM_RND to getVectorMaskingNode to select ISD::AND instead of...
Craig Topper [Thu, 23 Nov 2017 18:41:19 +0000 (18:41 +0000)]
[X86] Add X86ISD::CMPM_RND to getVectorMaskingNode to select ISD::AND instead of ISD::VSELECT

A later DAG combine will turn the VSELECT into an AND, but we have the other mask compare opcodes here so add this one too.

llvm-svn: 318931

6 years ago[X86] Remove some dead code leftover from when i1 was a legal type. NFCI
Craig Topper [Thu, 23 Nov 2017 18:41:18 +0000 (18:41 +0000)]
[X86] Remove some dead code leftover from when i1 was a legal type. NFCI

llvm-svn: 318930

6 years ago[X86] Remove some dead code. NFC
Craig Topper [Thu, 23 Nov 2017 18:41:17 +0000 (18:41 +0000)]
[X86] Remove some dead code. NFC

AVX512 code never reaches here so we don't need to handle X86ISD::CMPM as an opcode.

llvm-svn: 318929

6 years ago[clangd] Tracing improvements
Sam McCall [Thu, 23 Nov 2017 17:12:04 +0000 (17:12 +0000)]
[clangd] Tracing improvements

Summary:
[clangd] Tracing improvements

Compose JSON using JSONExpr
Allow attaching metadata to spans (and avoid it if tracing is off)
Attach IDs and responses of JSON RPCs to their spans

The downside is that large responses make the trace viewer sluggish.
We should make our responses less huge :-) Or fix trace viewer.

Reviewers: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D40132

llvm-svn: 318928

6 years ago[clangd] Make completion scores use 0-1 floats internally.
Sam McCall [Thu, 23 Nov 2017 17:09:04 +0000 (17:09 +0000)]
[clangd] Make completion scores use 0-1 floats internally.

Summary:
This scale is much easier to mix with other signals, such as fuzzy match strength.
Mostly NFC, but it does reorder some low-priority items that get folded together at a score of 0 (see completion-qualifiers.test).
Removed the exact sortText from the testcases, because it's the ranking that we want to test.

Reviewers: hokein

Subscribers: ilya-biryukov, cfe-commits

Differential Revision: https://reviews.llvm.org/D40089

llvm-svn: 318927

6 years ago[clang-tidy] rename_check.py misc-argument-comment bugprone-argument-comment
Alexander Kornienko [Thu, 23 Nov 2017 17:02:48 +0000 (17:02 +0000)]
[clang-tidy] rename_check.py misc-argument-comment bugprone-argument-comment

Summary: + manually convert the unit test to lit test.

Reviewers: hokein

Reviewed By: hokein

Subscribers: mgorny, xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D40392

llvm-svn: 318926

6 years ago[clangd] Drop impossible completions (unavailable or inaccessible)
Sam McCall [Thu, 23 Nov 2017 16:58:22 +0000 (16:58 +0000)]
[clangd] Drop impossible completions (unavailable or inaccessible)

Summary: (There must be some reason why D38077 didn't just do this, but I don't get it!)

Reviewers: ilya-biryukov

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D39836

llvm-svn: 318925

6 years ago[ELF] Skip over empty sections when checking for contiguous relro
Peter Smith [Thu, 23 Nov 2017 15:10:00 +0000 (15:10 +0000)]
[ELF] Skip over empty sections when checking for contiguous relro

When checking for contiguous relro sections we can skip over empty sections.
If there is an empty non-relro section in the middle of a contiguous block
of relro sections then it cannot be written to so it is safe to include in
PT_GNU_RELRO header. If there is a contiguous block of empty relro sections
then no PT_GNU_RELRO header is required for them.

Differential Revision: https://reviews.llvm.org/D40364

llvm-svn: 318924

6 years agoMSan: remove an unnecessary cast. NFC for userspace instrumenetation.
Alexander Potapenko [Thu, 23 Nov 2017 15:06:51 +0000 (15:06 +0000)]
MSan: remove an unnecessary cast. NFC for userspace instrumenetation.

llvm-svn: 318923

6 years ago[clang-tidy] rename_check.py: fix a bug in check presence detection
Alexander Kornienko [Thu, 23 Nov 2017 14:59:19 +0000 (14:59 +0000)]
[clang-tidy] rename_check.py: fix a bug in check presence detection

llvm-svn: 318922

6 years agoFixing a typo; NFC.
Aaron Ballman [Thu, 23 Nov 2017 14:57:24 +0000 (14:57 +0000)]
Fixing a typo; NFC.

llvm-svn: 318921

6 years ago[ELF] Give error message when relro sections are not contiguous.
Peter Smith [Thu, 23 Nov 2017 14:53:10 +0000 (14:53 +0000)]
[ELF] Give error message when relro sections are not contiguous.

If a linker script is used that names linker generated synthetic sections
it is possible that the OutputSections for which isRelroSection() is true
are not contiguous. When the relro sections are not contiguous we cannot
describe them with a single PT_GNU_RELRO PHDR. Unfortunately at least one
contemporary dynamic loader only supports one PT_GNU_RELRO PHDR so we
cannot output more than one of these PHDRs. As not including relro
sections in the PHDR will lead to security sensitive sections being
writeable we choose to give an error message instead.

Differential Revision: https://reviews.llvm.org/D40359

[ELF] Skip over empty sections when checking for contiguous relro

llvm-svn: 318920

6 years agoUpdate C++2a status and add Glen to CREDITS.TXT. Reviewed as https://reviews.llvm...
Marshall Clow [Thu, 23 Nov 2017 14:50:56 +0000 (14:50 +0000)]
Update C++2a status and add Glen to CREDITS.TXT. Reviewed as https://reviews.llvm.org/D40379

llvm-svn: 318919

6 years ago[clang-tidy] rename_check.py: Update '=====...' line in the docs.
Alexander Kornienko [Thu, 23 Nov 2017 14:05:32 +0000 (14:05 +0000)]
[clang-tidy] rename_check.py: Update '=====...' line in the docs.

llvm-svn: 318918

6 years ago[X86][SSE] Use (V)PHMINPOSUW for vXi16 SMAX/SMIN/UMAX/UMIN horizontal reductions...
Simon Pilgrim [Thu, 23 Nov 2017 13:50:27 +0000 (13:50 +0000)]
[X86][SSE] Use (V)PHMINPOSUW for vXi16 SMAX/SMIN/UMAX/UMIN horizontal reductions (PR32841)

(V)PHMINPOSUW determines the UMIN element in an v8i16 input, with suitable bit flipping it can also be used for SMAX/SMIN/UMAX cases as well.

This patch matches vXi16 SMAX/SMIN/UMAX/UMIN horizontal reductions and reduces the input down to a v8i16 vector before calling (V)PHMINPOSUW.

A later patch will use this for v16i8 reductions as well (PR32841).

Differential Revision: https://reviews.llvm.org/D39729

llvm-svn: 318917

6 years ago[clang-tidy] rename_check.py misc-string-constructor bugprone-string-constructor
Alexander Kornienko [Thu, 23 Nov 2017 13:49:14 +0000 (13:49 +0000)]
[clang-tidy] rename_check.py misc-string-constructor bugprone-string-constructor

Summary:
Rename misc-string-constructor to bugprone-string-constructor +
manually update the lenght of '==='s in the doc file.

Reviewers: hokein, xazax.hun

Reviewed By: hokein, xazax.hun

Subscribers: mgorny, xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D40388

llvm-svn: 318916

6 years ago[ARM GlobalISel] Support G_FDIV for s32 and s64
Diana Picus [Thu, 23 Nov 2017 13:26:07 +0000 (13:26 +0000)]
[ARM GlobalISel] Support G_FDIV for s32 and s64

TableGen already generates code for selecting a G_FDIV, so we only need
to add a test.

For the legalizer and reg bank select, we do the same thing as for the
other floating point binary operations: either mark as legal if we have
a FP unit or lower to a libcall, and map to the floating point
registers.

llvm-svn: 318915

6 years agoReverted rL318911 since it broke the sanitizer-windows.
Ying Yi [Thu, 23 Nov 2017 13:23:21 +0000 (13:23 +0000)]
Reverted rL318911 since it broke the sanitizer-windows.

llvm-svn: 318914

6 years ago[clang-tidy] Detect bugs in bugprone-misplaced-operator-in-strlen-in-alloc even in...
Adam Balogh [Thu, 23 Nov 2017 13:12:25 +0000 (13:12 +0000)]
[clang-tidy] Detect bugs in bugprone-misplaced-operator-in-strlen-in-alloc even in the case the allocation function is called using a constant function pointer

Detect bugs even if a function of the malloc() family is called using a constant pointer.

llvm-svn: 318913

6 years ago[clang-tidy] Add support for operator new[] in check bugprone-misplaced-operator...
Adam Balogh [Thu, 23 Nov 2017 12:56:23 +0000 (12:56 +0000)]
[clang-tidy] Add support for operator new[] in check bugprone-misplaced-operator-in-strlen-in-alloc

The check now recognizes error cases like `new char[strlen(s + 1)]` and suggests
a fix in the format `new char[strlen(s) + 1]`.

llvm-svn: 318912

6 years ago[lit] Implement non-pipelined ‘mkdir’, ‘diff’ and ‘rm’ commands internally
Ying Yi [Thu, 23 Nov 2017 12:48:41 +0000 (12:48 +0000)]
[lit] Implement non-pipelined ‘mkdir’, ‘diff’ and ‘rm’ commands internally

Summary:
The internal shell already supports 'cd', ‘export’ and ‘echo’ commands.
This patch adds implementation of non-pipelined ‘mkdir’, ‘diff’ and ‘rm’
commands as the internal shell builtins.

Reviewers: Zachary Turner, Reid Kleckner

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D39567

llvm-svn: 318911

6 years ago[ARM GlobalISel] Support G_FMUL for s32 and s64
Diana Picus [Thu, 23 Nov 2017 12:44:20 +0000 (12:44 +0000)]
[ARM GlobalISel] Support G_FMUL for s32 and s64

TableGen already generates code for selecting a G_FMUL, so we only need
to add a test for that part.

For the legalizer and reg bank select, we do the same thing as the other
floating point binary operators: either mark as legal if we have a FP
unit or lower to a libcall, and map to the floating point registers.

llvm-svn: 318910

6 years ago[ASTMatchers] Matchers for new[] operators
Adam Balogh [Thu, 23 Nov 2017 12:43:20 +0000 (12:43 +0000)]
[ASTMatchers] Matchers for new[] operators

Two new matchers for `CXXNewExpr` are added which may be useful e.g. in
`clang-tidy` checkers. One of them is `isArray` which matches `new[]` but not
plain `new`. The other one, `hasArraySize` matches `new[]` for a given size.

llvm-svn: 318909

6 years ago[mips] Use the delay slot filler to convert branches for microMIPSR6.
Simon Dardis [Thu, 23 Nov 2017 12:38:04 +0000 (12:38 +0000)]
[mips] Use the delay slot filler to convert branches for microMIPSR6.

The MIPS delay slot filler converts delay slot branches into compact
forms for the MIPS ISAs which support them. For branches that compare
(in)equality with with zero, it converts them into branches with implict
zero register operands. These branches have a slightly greater range
than normal two register operands branches.

Changing the branches at this point in the pipeline offers the long
branch pass the ability to mark better judgements if a long branch
sequence is required.

Reviewers: atanasyan

Differential Revision: https://reviews.llvm.org/D40314

llvm-svn: 318908

6 years ago[clang-tidy] Misplaced Operator in Strlen in Alloc
Adam Balogh [Thu, 23 Nov 2017 12:33:12 +0000 (12:33 +0000)]
[clang-tidy] Misplaced Operator in Strlen in Alloc

A possible error is to write `malloc(strlen(s+1))` instead of
`malloc(strlen(s)+1)`. Unfortunately the former is also valid syntactically,
but allocates less memory by two bytes (if `s` is at least one character long,
undefined behavior otherwise) which may result in overflow cases. This check
detects such cases and also suggests the fix for them.

Fix for r318906, forgot to add new files.

llvm-svn: 318907

6 years ago[clang-tidy] Misplaced Operator in Strlen in Alloc
Adam Balogh [Thu, 23 Nov 2017 12:26:28 +0000 (12:26 +0000)]
[clang-tidy] Misplaced Operator in Strlen in Alloc

A possible error is to write `malloc(strlen(s+1))` instead of
`malloc(strlen(s)+1)`. Unfortunately the former is also valid syntactically,
but allocates less memory by two bytes (if s` is at least one character long,
undefined behavior otherwise) which may result in overflow cases. This check
detects such cases and also suggests the fix for them.

llvm-svn: 318906