platform/upstream/llvm.git
6 years ago[CUDA] Use atexit() to call module destructor.
Artem Belevich [Wed, 27 Jun 2018 18:32:51 +0000 (18:32 +0000)]
[CUDA] Use atexit() to call module destructor.

This matches the way NVCC does it. Doing module cleanup at global
destructor phase used to work, but is, apparently, too late for
the CUDA runtime in CUDA-9.2, which ends up crashing with double-free.

Differential Revision: https://reviews.llvm.org/D48613

llvm-svn: 335763

6 years ago[UBSan] Add silence_unsigned_overflow flag.
Matt Morehouse [Wed, 27 Jun 2018 18:24:46 +0000 (18:24 +0000)]
[UBSan] Add silence_unsigned_overflow flag.

Summary:
Setting UBSAN_OPTIONS=silence_unsigned_overflow=1 will silence all UIO
reports.  This feature, combined with
-fsanitize-recover=unsigned-integer-overflow, is useful for providing
fuzzing signal without the excessive log output.

Helps with https://github.com/google/oss-fuzz/issues/910.

Reviewers: kcc, vsk

Reviewed By: vsk

Subscribers: vsk, kubamracek, Dor1s, llvm-commits

Differential Revision: https://reviews.llvm.org/D48660

llvm-svn: 335762

6 years ago[DAGCombiner] restrict (float)((int) f) --> ftrunc with no-signed-zeros
Sanjay Patel [Wed, 27 Jun 2018 18:16:40 +0000 (18:16 +0000)]
[DAGCombiner] restrict (float)((int) f) --> ftrunc with no-signed-zeros

As noted in the D44909 review, the transform from (fptosi+sitofp) to ftrunc
can produce -0.0 where the original code does not:

#include <stdio.h>

int main(int argc) {
  float x;
  x = -0.8 * argc;
  printf("%f\n", (float)((int)x));
  return 0;
}

$ clang -O0 -mavx fp.c ; ./a.out
0.000000
$ clang -O1 -mavx fp.c ; ./a.out
-0.000000

Ideally, we'd use IR/node flags to predicate the transform, but the IR parser
doesn't currently allow fast-math-flags on the cast instructions. So for now,
just use the function attribute that corresponds to clang's "-fno-signed-zeros"
option.

Differential Revision: https://reviews.llvm.org/D48085

llvm-svn: 335761

6 years ago[ThinLTO] Print names in function import debug messages when available
Teresa Johnson [Wed, 27 Jun 2018 18:03:39 +0000 (18:03 +0000)]
[ThinLTO] Print names in function import debug messages when available

Summary:
Rather than just print the GUID, when it is available in the index,
print the global name as well in the function import thin link debug
messages. Names will be available when the combined index is being
built by the same process, e.g. a linker or "llvm-lto2 run".

Reviewers: davidxl

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

Differential Revision: https://reviews.llvm.org/D48612

llvm-svn: 335760

6 years ago[Object] Allow iterating over an IRObjectFile's modules
Justin Bogner [Wed, 27 Jun 2018 17:58:32 +0000 (17:58 +0000)]
[Object] Allow iterating over an IRObjectFile's modules

If you've already loaded an IRObjectFile and need access to the
Modules themselves you shouldn't have to reparse a byte stream to do
it. Adds an accessor for the modules in IRObjectFile.

llvm-svn: 335759

6 years ago[MachineOutliner] Don't outline sequences where x16/x17/nzcv are live across
Jessica Paquette [Wed, 27 Jun 2018 17:43:27 +0000 (17:43 +0000)]
[MachineOutliner] Don't outline sequences where x16/x17/nzcv are live across

It isn't safe to outline sequences of instructions where x16/x17/nzcv live
across the sequence.

This teaches the outliner to check whether or not a specific canidate has
x16/x17/nzcv live across it and discard the candidate in the case that that is
true.

https://bugs.llvm.org/show_bug.cgi?id=37573
https://reviews.llvm.org/D47655

llvm-svn: 335758

6 years ago[DebugInfo] Emit ObjC methods as part of interface
Jonas Devlieghere [Wed, 27 Jun 2018 17:31:59 +0000 (17:31 +0000)]
[DebugInfo] Emit ObjC methods as part of interface

As brought up during the discussion of the DWARF5 accelerator tables,
there is currently no way to associate Objective-C methods with the
interface they belong to, other than the .apple_objc accelerator table.

After due consideration we came to the conclusion that it makes more
sense to follow Pavel's suggestion of just emitting this information in
the .debug_info section. One concern was that categories were
emitted in the .apple_names as well, but it turns out that LLDB doesn't
rely on the accelerator tables for this information.

This patch changes the codegen behavior to emit subprograms for
structure types, like we do for C++. This will result in the
DW_TAG_subprogram being nested as a child under its
DW_TAG_structure_type. This behavior is only enabled for DWARF5 and
later, so we can have a unique code path in LLDB with regards to
obtaining the class methods.

This was tested on the LLDB side and doesn't lead to a regression.
There's already code in place to deal with member functions in C++,
which deals with this transparently.

For more background please refer to the discussion on the mailing list:
http://lists.llvm.org/pipermail/llvm-dev/2018-June/123986.html

Differential revision: https://reviews.llvm.org/D48241

llvm-svn: 335757

6 years ago[InstCombine] add more tests for shuffle with different binops; NFC
Sanjay Patel [Wed, 27 Jun 2018 17:21:57 +0000 (17:21 +0000)]
[InstCombine] add more tests for shuffle with different binops; NFC

llvm-svn: 335756

6 years ago[sanitizer] zx_cprng_draw no longer takes the output argument
Petr Hosek [Wed, 27 Jun 2018 16:49:37 +0000 (16:49 +0000)]
[sanitizer] zx_cprng_draw no longer takes the output argument

The zx_cprng_draw system call no longer takes the output argument.

Differential Revision: https://reviews.llvm.org/D48657

llvm-svn: 335755

6 years ago[X86] Use bts/btr/btc for single bit set/clear/complement of a variable bit position
Craig Topper [Wed, 27 Jun 2018 16:47:39 +0000 (16:47 +0000)]
[X86] Use bts/btr/btc for single bit set/clear/complement of a variable bit position

If we are just modifying a single bit at a variable bit position we can use the BT* instructions to make the change instead of shifting a 1(or rotating a -1) and doing a binop. These instruction also ignore the upper bits of their index input so we can also remove an and if one is present on the index.

Fixes PR37938.

llvm-svn: 335754

6 years ago[X86] Add test cases for D48606.
Craig Topper [Wed, 27 Jun 2018 16:47:36 +0000 (16:47 +0000)]
[X86] Add test cases for D48606.

llvm-svn: 335753

6 years agoRevert "[Analyzer] Moved RangeConstraintManager to header. NFC."
Mikhail R. Gadelha [Wed, 27 Jun 2018 16:45:58 +0000 (16:45 +0000)]
Revert "[Analyzer] Moved RangeConstraintManager to header. NFC."

This broke a number of bots.

This reverts commit 5e1a89912d37a21c3b49ccf30600d7f498dffa9c.

llvm-svn: 335752

6 years ago[AliasSet] Fix UnknownInstructions printing
Jakub Kuderski [Wed, 27 Jun 2018 16:34:30 +0000 (16:34 +0000)]
[AliasSet] Fix UnknownInstructions printing

Summary:
AliasSet::print uses `I->printAsOperand` to print UnknownInstructions. The problem is that not all UnknownInstructions have names (e.g. call instructions). When such instructions are printed, they appear as `<badref>` in AliasSets, which is very confusing, as the values are perfectly valid.

This patch fixes that by printing UnknownInstructions without a name using `print` instead of `printAsOperand`.

Reviewers: asbirlea, chandlerc, sanjoy, grosser

Reviewed By: asbirlea

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D48609

llvm-svn: 335751

6 years ago[NEON] Remove empty test file from r335734
Francis Visoiu Mistrih [Wed, 27 Jun 2018 16:17:32 +0000 (16:17 +0000)]
[NEON] Remove empty test file from r335734

Fails on Green Dragon:
http://green.lab.llvm.org/green/job/clang-stage1-cmake-RA-incremental/50174/consoleFull

UNRESOLVED: Clang :: CodeGen/vld_dup.c (5546 of 38947)
******************** TEST 'Clang :: CodeGen/vld_dup.c' FAILED ********************
Test has no run line!

llvm-svn: 335750

6 years ago[dsymutil] Move abstractions into separate files (NFC)
Jonas Devlieghere [Wed, 27 Jun 2018 16:13:40 +0000 (16:13 +0000)]
[dsymutil] Move abstractions into separate files (NFC)

This patch splits off some abstractions used by dsymutil's dwarf linker
and moves them into separate header and implementation files. This
almost halves the number of LOC in DwarfLinker.cpp and makes it a lot
easier to understand what functionality lives where.

Differential revision: https://reviews.llvm.org/D48647

llvm-svn: 335749

6 years ago[llvm-mca] Register listeners with stages; remove Pipeline dependency from Stage.
Matt Davis [Wed, 27 Jun 2018 16:09:33 +0000 (16:09 +0000)]
[llvm-mca] Register listeners with  stages; remove Pipeline dependency from Stage.

Summary:
This patch removes a few callbacks from Pipeline.  It comes at the cost of
registering Listeners with all Stages.  Not all stages need listeners or issue
callbacks, this registration is a bit redundant.  However, as we build-out the
API, this redundancy can disappear.

The main purpose here is to move callback code from the Pipeline and into the
stages that actually issue those callbacks. This removes the back-pointer to
the Pipeline that was put into a few Stage subclasses.

Reviewers: andreadb, courbet, RKSimon

Reviewed By: andreadb, courbet

Subscribers: tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D48576

llvm-svn: 335748

6 years ago[asan] Relax the null_deref.cc test even further
Vedant Kumar [Wed, 27 Jun 2018 16:06:15 +0000 (16:06 +0000)]
[asan] Relax the null_deref.cc test even further

On Darwin/x86_64, asan may report the crashing line of NullDeref as line
19 (i.e the closing brace of the function), whereas on other targets we
see line 15 ("ptr[10]++").

The optimized debug info here isn't reliable enough to check.

rdar://problem/41526369

llvm-svn: 335747

6 years ago[X86][SSE] Add missing AVX512 rotation tests
Simon Pilgrim [Wed, 27 Jun 2018 16:00:53 +0000 (16:00 +0000)]
[X86][SSE] Add missing AVX512 rotation tests

Increase coverage to make sure we're not doing anything stupid without AVX512BW

llvm-svn: 335746

6 years ago[X86] Rename llvm.x86.avx512.mask.fpclass.p* to exclude 'mask.' from the name to...
Craig Topper [Wed, 27 Jun 2018 15:57:57 +0000 (15:57 +0000)]
[X86] Rename llvm.x86.avx512.mask.fpclass.p* to exclude 'mask.' from the name to match llvm.

llvm-svn: 335745

6 years ago[X86] Rename the autoupgraded of packed fp compare and fpclass intrinsics that don...
Craig Topper [Wed, 27 Jun 2018 15:57:53 +0000 (15:57 +0000)]
[X86] Rename the autoupgraded of packed fp compare and fpclass intrinsics that don't take a mask as input to exclude '.mask.' from their name.

I think the intrinsics named 'avx512.mask.' should refer to the previous behavior of taking a mask argument in the intrinsic instead of using a 'select' or 'and' instruction in IR to accomplish the masking. This is more consistent with the goal that eventually we will have no intrinsics that have masking builtin. When we reach that goal, we should have no intrinsics named "avx512.mask".

llvm-svn: 335744

6 years ago[ELF] Rename RF_PROGBITS_NOT_EXEC_OR_WRITE to RF_RODATA
Fangrui Song [Wed, 27 Jun 2018 15:56:32 +0000 (15:56 +0000)]
[ELF] Rename RF_PROGBITS_NOT_EXEC_OR_WRITE to RF_RODATA

Post commit review at D48406

llvm-svn: 335743

6 years ago[AMDGPU] Convert rcp to rcp_iflag
Stanislav Mekhanoshin [Wed, 27 Jun 2018 15:33:33 +0000 (15:33 +0000)]
[AMDGPU] Convert rcp to rcp_iflag

If a source of rcp instruction is a result of any conversion from
an integer convert it into rcp_iflag instruction. No FP exception
can ever happen except division by zero if a single precision rcp
argument is a representation of an integral number.

Differential Revision: https://reviews.llvm.org/D48569

llvm-svn: 335742

6 years ago[asan] Relax a test which depends on optimized debug info
Vedant Kumar [Wed, 27 Jun 2018 14:57:59 +0000 (14:57 +0000)]
[asan] Relax a test which depends on optimized debug info

On some ARM platforms this test depends on debug locations being
present on constant materialization code, which was eliminated in
r335497.

Relax the test to allow two outcomes: the backtrace either contains the
right line numbers, or no line numbers.

llvm-svn: 335741

6 years ago[analyzer] Allow registering custom statically-linked analyzer checkers
Alexander Kornienko [Wed, 27 Jun 2018 14:56:12 +0000 (14:56 +0000)]
[analyzer] Allow registering custom statically-linked analyzer checkers

Summary:
Add an extension point to allow registration of statically-linked Clang Static
Analyzer checkers that are not a part of the Clang tree. This extension point
employs the mechanism used when checkers are registered from dynamically loaded
plugins.

Reviewers: george.karpenkov, NoQ, xazax.hun, dcoughlin

Reviewed By: george.karpenkov

Subscribers: mgorny, mikhail.ramalho, rnkovacs, xazax.hun, szepet, a.sidorin, cfe-commits

Differential Revision: https://reviews.llvm.org/D45718

llvm-svn: 335740

6 years ago[analyzer] Fix string not being formatted with extra arguments
Mikhail R. Gadelha [Wed, 27 Jun 2018 14:39:41 +0000 (14:39 +0000)]
[analyzer] Fix string not being formatted with extra arguments

Signed-off-by: Mikhail Ramalho <mikhail.ramalho@gmail.com>
llvm-svn: 335739

6 years ago[ELF] - ICF: Add test case to check many sections case.
George Rimar [Wed, 27 Jun 2018 14:37:02 +0000 (14:37 +0000)]
[ELF] - ICF: Add test case to check many sections case.

Currently, ICF does not enable threading if we have less than 1024
sections in each equivalence class.

And the following code is uncovered by our test cases:
https://github.com/llvm-mirror/lld/blob/master/ELF/ICF.cpp#L404

This patch adds a test case that triggers the mentioned code to execute.

llvm-svn: 335738

6 years ago[AArch64] Reverting FP16 vcvth_n_s64_f16 to fix
Luke Geeson [Wed, 27 Jun 2018 14:34:40 +0000 (14:34 +0000)]
[AArch64] Reverting FP16 vcvth_n_s64_f16 to fix

llvm-svn: 335737

6 years ago[clang-tidy] Add ExprMutationAnalyzer, that analyzes whether an expression is mutated...
Alexander Kornienko [Wed, 27 Jun 2018 14:30:55 +0000 (14:30 +0000)]
[clang-tidy] Add ExprMutationAnalyzer, that analyzes whether an expression is mutated within a statement.

Summary:
(Originally started as a clang-tidy check but there's already D45444 so shifted to just adding ExprMutationAnalyzer)

`ExprMutationAnalyzer` is a generally useful helper that can be used in different clang-tidy checks for checking whether a given expression is (potentially) mutated within a statement (typically the enclosing compound statement.)

This is a more general and more powerful/accurate version of isOnlyUsedAsConst, which is used in ForRangeCopyCheck, UnnecessaryCopyInitialization.

It should also be possible to construct checks like D45444 (suggest adding const to variable declaration) or https://bugs.llvm.org/show_bug.cgi?id=21981 (suggest adding const to member function) using this helper function.

This function is tested by itself and is intended to stay generally useful instead of tied to any particular check.

Reviewers: hokein, alexfh, aaron.ballman, ilya-biryukov, george.karpenkov

Reviewed By: aaron.ballman

Subscribers: lebedev.ri, shuaiwang, rnkovacs, hokein, alexfh, aaron.ballman, a.sidorin, Eugene.Zelenko, xazax.hun, JonasToth, klimek, mgorny, cfe-commits

Tags: #clang-tools-extra

Patch by Shuai Wang.

Differential Revision: https://reviews.llvm.org/D45679

llvm-svn: 335736

6 years ago[AArch64] Add custom lowering for v4i8 trunc store
Adhemerval Zanella [Wed, 27 Jun 2018 13:58:46 +0000 (13:58 +0000)]
[AArch64] Add custom lowering for v4i8 trunc store

This patch adds a custom trunc store lowering for v4i8 vector types.
Since there is not v.4b register, the v4i8 is promoted to v4i16 (v.4h)
and default action for v4i8 is to extract each element and issue 4
byte stores.

A better strategy would be to extended the promoted v4i16 to v8i16
(with undef elements) and extract and store the word lane which
represents the v4i8 subvectores. The construction:

  define void @foo(<4 x i16> %x, i8* nocapture %p) {
    %0 = trunc <4 x i16> %x to <4 x i8>
    %1 = bitcast i8* %p to <4 x i8>*
    store <4 x i8> %0, <4 x i8>* %1, align 4, !tbaa !2
    ret void
  }

Can be optimized from:

  umov    w8, v0.h[3]
  umov    w9, v0.h[2]
  umov    w10, v0.h[1]
  umov    w11, v0.h[0]
  strb    w8, [x0, #3]
  strb    w9, [x0, #2]
  strb    w10, [x0, #1]
  strb    w11, [x0]
  ret

To:

  xtn     v0.8b, v0.8h
  str     s0, [x0]
  ret

The patch also adjust the memory cost for autovectorization, so the C
code:

  void foo (const int *src, int width, unsigned char *dst)
  {
    for (int i = 0; i < width; i++)
       *dst++ = *src++;
  }

can be vectorized to:

  .LBB0_4:                                // %vector.body
                                          // =>This Inner Loop Header: Depth=1
        ldr     q0, [x0], #16
        subs    x12, x12, #4            // =4
        xtn     v0.4h, v0.4s
        xtn     v0.8b, v0.8h
        st1     { v0.s }[0], [x2], #4
        b.ne    .LBB0_4

Instead of byte operations.

llvm-svn: 335735

6 years ago[NEON] Support vldNq intrinsics in AArch32 (Clang part)
Ivan A. Kosarev [Wed, 27 Jun 2018 13:58:43 +0000 (13:58 +0000)]
[NEON] Support vldNq intrinsics in AArch32 (Clang part)

This patch reworks the support for dup NEON intrinsics as
described in D48439.

Differential Revision: https://reviews.llvm.org/D48440

llvm-svn: 335734

6 years ago[NEON] Support vldNq intrinsics in AArch32 (LLVM part)
Ivan A. Kosarev [Wed, 27 Jun 2018 13:57:52 +0000 (13:57 +0000)]
[NEON] Support vldNq intrinsics in AArch32 (LLVM part)

This patch adds support for the q versions of the dup
(load-to-all-lanes) NEON intrinsics, such as vld2q_dup_f16() for
example.

Currently, non-q versions of the dup intrinsics are implemented
in clang by generating IR that first loads the elements of the
structure into the first lane with the lane (to-single-lane)
intrinsics, and then propagating it other lanes. There are at
least two problems with this approach. First, there are no
double-spaced to-single-lane byte-element instructions. For
example, there is no such instruction as 'vld2.8 { d0[0], d2[0]
}, [r0]'. That means we cannot rely on the to-single-lane
intrinsics and instructions to implement the q versions of the
dup intrinsics. Note that to-all-lanes instructions do support
all sizes of data items, including bytes.

The second problem with the current approach is that we need a
separate vdup instruction to propagate the structure to each
lane. So for vld4q_dup_f16() we would need four vdup instructions
in addition to the initial vld instruction.

This patch introduces dup LLVM intrinsics and reworks handling of
the currently supported (non-q) NEON dup intrinsics to expand
them into those LLVM intrinsics, thus eliminating the need for
using to-single-lane intrinsics and instructions.

Additionally, this patch adds support for u64 and s64 dup NEON
intrinsics. These are marked as Arch64-only in the ARM NEON
Reference, but it seems there are no reasons to not support them
in AArch32 mode. Please correct, if that is wrong.

That's what we generate with this patch applied:

vld2q_dup_f16:
  vld2.16 {d0[], d2[]}, [r0]
  vld2.16 {d1[], d3[]}, [r0]

vld3q_dup_f16:
  vld3.16 {d0[], d2[], d4[]}, [r0]
  vld3.16 {d1[], d3[], d5[]}, [r0]

vld4q_dup_f16:
  vld4.16 {d0[], d2[], d4[], d6[]}, [r0]
  vld4.16 {d1[], d3[], d5[], d7[]}, [r0]

Differential Revision: https://reviews.llvm.org/D48439

llvm-svn: 335733

6 years ago[PPC64] Add support for R_PPC64_GOT_DTPREL16* relocations
Zaara Syeda [Wed, 27 Jun 2018 13:55:41 +0000 (13:55 +0000)]
[PPC64] Add support for R_PPC64_GOT_DTPREL16* relocations

The local dynamic TLS access on PPC64 ELF v2 ABI uses R_PPC64_GOT_DTPREL16*
relocations when a TLS variables falls outside 2 GB of the thread storage
block. This patch adds support for these relocations by adding a new RelExpr
called R_TLSLD_GOT_OFF which emits a got entry for the TLS variable relative
to the dynamic thread pointer using the relocation R_PPC64_DTPREL64. It then
evaluates the R_PPC64_GOT_DTPREL16* relocations as the got offset for the
R_PPC64_DTPREL64 got entries.

Differential Revision: https://reviews.llvm.org/D48484

llvm-svn: 335732

6 years agoRe-apply: [ASTImporter] Import the whole redecl chain of functions
Gabor Marton [Wed, 27 Jun 2018 13:32:50 +0000 (13:32 +0000)]
Re-apply: [ASTImporter] Import the whole redecl chain of functions

Summary:
With this patch when any `FunctionDecl` of a redeclaration chain is imported
then we bring in the whole declaration chain.  This involves functions and
function template specializations.  Also friend functions are affected.  The
chain is imported as it is in the "from" tu, the order of the redeclarations
are kept.  I also changed the lookup logic in order to find friends, but first
making them visible in their declaration context.  We may have long
redeclaration chains if all TU contains the same prototype, but our
measurements shows no degradation in time of CTU analysis (Tmux, Xerces,
Bitcoin, Protobuf).  Also, as further work we could squash redundant
prototypes, but first ensure that functionality is working properly; then
should we optimize.

This may seem like a huge patch, sorry about that. But, most of the changes are
new tests, changes in the production code is not that much.  I also tried to
create a smaller patch which does not affect specializations, but that patch
failed to pass some of the `clang-import-test`s because there we import
function specializations. Also very importantly, we can't just change the
import of `FunctionDecl`s without changing the import of function template
specializations because they are handled as `FunctionDecl`s.

Reviewers: a.sidorin, r.stahl, xazax.hun, balazske, a_sidorin

Reviewed By: a_sidorin

Subscribers: labath, aprantl, a_sidorin, rnkovacs, dkrupp, cfe-commits

Differential Revision: https://reviews.llvm.org/D47532

Re-apply commit rC335480

llvm-svn: 335731

6 years ago[PPC64] Add TLS global dynamic to local exec relaxation
Zaara Syeda [Wed, 27 Jun 2018 13:27:29 +0000 (13:27 +0000)]
[PPC64] Add TLS global dynamic to local exec relaxation

This patch adds the target call back relaxTlsGdToLe to support TLS relaxation
from global dynamic to local exec model.

The relaxation performs the following transformation:
addis r3, r2, x@got@tlsgd@ha --> nop
addi r3, r3, x@got@tlsgd@l   --> addis r3, r13, x@tprel@ha
bl __tls_get_addr(x@tlsgd)   --> nop
nop                          --> addi r3, r3, x@tprel@l

Differential Revision: https://reviews.llvm.org/D48082

llvm-svn: 335730

6 years ago[ValueLattice] Return false if value range did not change in mergeIn.
Florian Hahn [Wed, 27 Jun 2018 12:57:51 +0000 (12:57 +0000)]
[ValueLattice] Return false if value range did not change in mergeIn.

llvm-svn: 335729

6 years ago[CMake] Tidy up the organisation of compiler-rt when configured as a standalone
Dan Liew [Wed, 27 Jun 2018 12:56:34 +0000 (12:56 +0000)]
[CMake] Tidy up the organisation of compiler-rt when configured as a standalone
build with an IDE (e.g. Xcode) as the generator.

Previously the global `USE_FOLDERS` property wasn't set in standalone
builds leading to existing settings of FOLDER not being respected.

In addition to this there were several targets that appeared at the top
level that were not interesting and clustered up the view. These have
been changed to be displayed in "Compiler-RT Misc".

Now when an Xcode project is generated from a standalone compiler-rt
build the project navigator is much less cluttered. The interesting
libraries should appear in "Compiler-RT Libraries" in the IDE.

Differential Revision: https://reviews.llvm.org/D48378

llvm-svn: 335728

6 years ago[DAGCombiner] visitSDIV - add special case handling for (sdiv X, 1) -> X in pow2...
Simon Pilgrim [Wed, 27 Jun 2018 12:45:31 +0000 (12:45 +0000)]
[DAGCombiner] visitSDIV - add special case handling for (sdiv X, 1) -> X in pow2 expansion

For divisor = 1, perform a select of X - reduces scalarisation of simple SDIVs

llvm-svn: 335727

6 years ago[Analyzer] Moved RangeConstraintManager to header. NFC.
Mikhail R. Gadelha [Wed, 27 Jun 2018 12:42:48 +0000 (12:42 +0000)]
[Analyzer] Moved RangeConstraintManager to header. NFC.

Summary: While at it, added a dump method to RangeSet.

Reviewers: george.karpenkov, NoQ

Reviewed By: george.karpenkov

Subscribers: xazax.hun, szepet, a.sidorin

Differential Revision: https://reviews.llvm.org/D48561

llvm-svn: 335726

6 years agoAdd regression test for PR37935.
Nico Weber [Wed, 27 Jun 2018 12:05:06 +0000 (12:05 +0000)]
Add regression test for PR37935.

llvm-svn: 335725

6 years agoBuild TaskQueueTest in threads=on builds, fixes regression from r335608.
Nico Weber [Wed, 27 Jun 2018 11:52:30 +0000 (11:52 +0000)]
Build TaskQueueTest in threads=on builds, fixes regression from r335608.

llvm-svn: 335724

6 years ago[clangd] Sema ranking tweaks: downrank keywords and injected names.
Sam McCall [Wed, 27 Jun 2018 11:43:54 +0000 (11:43 +0000)]
[clangd] Sema ranking tweaks: downrank keywords and injected names.

Summary:
Injected names being ranked too high was just a bug.
The high boost for keywords was intended, but was too much given how useless
keywords are. We should probably boost them on a case-by-case basis eventually.

Subscribers: ilya-biryukov, ioeric, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D48368

llvm-svn: 335723

6 years ago[llvm-mca] Avoid calling method update() on instructions that are already in the...
Andrea Di Biagio [Wed, 27 Jun 2018 11:17:07 +0000 (11:17 +0000)]
[llvm-mca] Avoid calling method update() on instructions that are already in the IS_READY state. NFCI

When promoting instructions from the wait queue to the ready queue, we should
check if an instruction has already reached the IS_READY state before
calling method update().

llvm-svn: 335722

6 years ago[X86][SSE] Include MIN_SIGNED element in non-uniform SDIV pow2 tests
Simon Pilgrim [Wed, 27 Jun 2018 10:59:36 +0000 (10:59 +0000)]
[X86][SSE] Include MIN_SIGNED element in non-uniform SDIV pow2 tests

llvm-svn: 335721

6 years ago[DAGCombiner] visitSDIV - simplify pow2 handling. NFCI.
Simon Pilgrim [Wed, 27 Jun 2018 10:51:55 +0000 (10:51 +0000)]
[DAGCombiner] visitSDIV - simplify pow2 handling. NFCI.

Use the builtin constant folding of getNode() etc. instead of doing it manually.

llvm-svn: 335720

6 years ago[DAGCombiner] Fold SDIV(%X, MIN_SIGNED) -> SELECT(%X == MIN_SIGNED, 1, 0)
Simon Pilgrim [Wed, 27 Jun 2018 10:21:06 +0000 (10:21 +0000)]
[DAGCombiner] Fold SDIV(%X, MIN_SIGNED) -> SELECT(%X == MIN_SIGNED, 1, 0)

Fixes PR37569.

llvm-svn: 335719

6 years ago[clangd] Do not show namespace comments.
Ilya Biryukov [Wed, 27 Jun 2018 09:47:20 +0000 (09:47 +0000)]
[clangd] Do not show namespace comments.

Summary:
Comments from namespaces that clangd produces are too noisy and often
not useful.

Namespaces have too many redecls and we don't have a good way of
determining which of the comments are relevant and which should be
ignored (e.g. because they come from code generators like the protobuf
compiler).

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: ioeric, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D48211

llvm-svn: 335718

6 years ago[DAGCombiner] Don't accept signbit sdiv divisors in sdiv-by-pow2 vector expansion...
Simon Pilgrim [Wed, 27 Jun 2018 09:41:22 +0000 (09:41 +0000)]
[DAGCombiner] Don't accept signbit sdiv divisors in sdiv-by-pow2 vector expansion (PR37569)

llvm-svn: 335717

6 years agoRemoving empty CodeGen dir in root
Luke Geeson [Wed, 27 Jun 2018 09:23:38 +0000 (09:23 +0000)]
Removing empty CodeGen dir in root

llvm-svn: 335716

6 years ago[AArch64] Remove Duplicate FP16 Patterns with same encoding, match on existing patterns
Luke Geeson [Wed, 27 Jun 2018 09:20:13 +0000 (09:20 +0000)]
[AArch64] Remove Duplicate FP16 Patterns with same encoding, match on existing patterns

llvm-svn: 335715

6 years ago[ELF] - Implement linker script OVERLAYs.
George Rimar [Wed, 27 Jun 2018 08:08:12 +0000 (08:08 +0000)]
[ELF] - Implement linker script OVERLAYs.

This is PR36768.

Linker script OVERLAYs are described in 4.6.9. Overlay Description of the spec:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/4/html/Using_ld_the_GNU_Linker/sections.html

They are used to allow output sections which have different LMAs but the same VAs
and used for embedded programming.

Currently, LLD restricts overlapping of sections and that seems to be the most desired
behaviour for defaults. My thoughts about possible approaches for PR36768 are on the bug page,
this patch implements OVERLAY keyword and allows VAs overlapping for sections that within the overlay.

Differential revision: https://reviews.llvm.org/D44780

llvm-svn: 335714

6 years agoMake -z option check more strict.
Rui Ueyama [Wed, 27 Jun 2018 07:56:23 +0000 (07:56 +0000)]
Make -z option check more strict.

llvm-svn: 335713

6 years agoReport an error for an unknown -z option.
Rui Ueyama [Wed, 27 Jun 2018 07:22:27 +0000 (07:22 +0000)]
Report an error for an unknown -z option.

This is a less clever version of https://reviews.llvm.org/D48433.
This is a dumb version but I think I prefer this for its simplicity.

Differential Revision: https://reviews.llvm.org/D48621

llvm-svn: 335712

6 years agoAdd missing constness.
Tatyana Krasnukha [Wed, 27 Jun 2018 07:01:07 +0000 (07:01 +0000)]
Add missing constness.

llvm-svn: 335711

6 years agoMove AddressClass to private enums since API doesn't provide any functions to manage it.
Tatyana Krasnukha [Wed, 27 Jun 2018 06:50:10 +0000 (06:50 +0000)]
Move AddressClass to private enums since API doesn't provide any functions to manage it.

This change allows to make AddressClass strongly typed enum and not to have issues with old versions of SWIG that don't support enum classes.

llvm-svn: 335710

6 years agoFix a single typo in SBSymbolContext
Dave Lee [Wed, 27 Jun 2018 06:46:09 +0000 (06:46 +0000)]
Fix a single typo in SBSymbolContext

Summary: Fix a "Manay" in SBSymbolContext.i

Reviewers: xiaobai

Reviewed By: xiaobai

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D48620

llvm-svn: 335709

6 years ago[CMake] Support passing FUCHSIA_SDK as the only variable
Petr Hosek [Wed, 27 Jun 2018 05:50:43 +0000 (05:50 +0000)]
[CMake] Support passing FUCHSIA_SDK as the only variable

Now that the structure of Fuchsia SDK has been formalized, we no
longer need to pass all the different CFLAGS/LDFLAGS to the CMake
build separately, we can simply set the FUCHSIA_SDK variable and
derive all the necessary variables from that one inside the cache
file.

Differential Revision: https://reviews.llvm.org/D48564

llvm-svn: 335708

6 years agoAMDGPU/NFC: Fix typo in comment
Konstantin Zhuravlyov [Wed, 27 Jun 2018 05:36:03 +0000 (05:36 +0000)]
AMDGPU/NFC: Fix typo in comment

llvm-svn: 335707

6 years agoAMDHSA: Rename RESERVED -> RESERVED0, mark gfx9-specific field
Konstantin Zhuravlyov [Wed, 27 Jun 2018 05:18:50 +0000 (05:18 +0000)]
AMDHSA: Rename RESERVED -> RESERVED0, mark gfx9-specific field

llvm-svn: 335706

6 years agoAMDHSA/NFC: Address missed review feedback from
Konstantin Zhuravlyov [Wed, 27 Jun 2018 04:56:00 +0000 (04:56 +0000)]
AMDHSA/NFC: Address missed review feedback from
https://reviews.llvm.org/D47566

Change wording from "Must be backwards compatible" to
"Must match hardware definition" for enums that are
defined by hardware.

llvm-svn: 335705

6 years ago[CMake] Provide direct support for building sanitized runtimes
Petr Hosek [Wed, 27 Jun 2018 03:35:53 +0000 (03:35 +0000)]
[CMake] Provide direct support for building sanitized runtimes

This avoids having to rely on magic separators and special parsing.

Differential Revision: https://reviews.llvm.org/D48061

llvm-svn: 335704

6 years ago[CMake] Use variables rather than ":" delimiters
Petr Hosek [Wed, 27 Jun 2018 03:14:41 +0000 (03:14 +0000)]
[CMake] Use variables rather than ":" delimiters

This is a more idiomatic CMake.

Differential Revision: https://reviews.llvm.org/D37644

llvm-svn: 335703

6 years agoFix warning about unhandled enumeration in switch.
Zachary Turner [Wed, 27 Jun 2018 02:49:22 +0000 (02:49 +0000)]
Fix warning about unhandled enumeration in switch.

llvm-svn: 335702

6 years ago[analyzer] [NFC] A convenient getter for getting a current stack frame
George Karpenkov [Wed, 27 Jun 2018 01:51:55 +0000 (01:51 +0000)]
[analyzer] [NFC] A convenient getter for getting a current stack frame

Differential Revision: https://reviews.llvm.org/D44756

llvm-svn: 335701

6 years ago[analyzer] [NFC] Add -verify to malloc checker test
George Karpenkov [Wed, 27 Jun 2018 01:51:36 +0000 (01:51 +0000)]
[analyzer] [NFC] Add -verify to malloc checker test

Differential Revision: https://reviews.llvm.org/D48514

llvm-svn: 335700

6 years agoDiagnose missing 'template' keywords in contexts where a comma is not a
Richard Smith [Wed, 27 Jun 2018 01:32:04 +0000 (01:32 +0000)]
Diagnose missing 'template' keywords in contexts where a comma is not a
binary operator.

Factor out the checking for a comma within potential angle brackets and
also call it from contexts where we parse a comma-separated list of
arguments or initializers.

llvm-svn: 335699

6 years ago[ADT] Pass DerivedT from pointe{e,r}_iterator to iterator_adaptor_base
Justin Bogner [Wed, 27 Jun 2018 00:54:36 +0000 (00:54 +0000)]
[ADT] Pass DerivedT from pointe{e,r}_iterator to iterator_adaptor_base

These were passing the wrong type into iterator_adaptor_base if T was
anything but the default.

llvm-svn: 335698

6 years ago[llvm-mca] Add a comment to Stage::execute and fix a spelling error. NFC.
Matt Davis [Wed, 27 Jun 2018 00:54:11 +0000 (00:54 +0000)]
[llvm-mca] Add a comment to Stage::execute and fix a spelling error. NFC.

llvm-svn: 335697

6 years ago[InstCombine] Avoid creating mis-sized dbg.values in commonCastTransforms()
Vedant Kumar [Wed, 27 Jun 2018 00:47:53 +0000 (00:47 +0000)]
[InstCombine] Avoid creating mis-sized dbg.values in commonCastTransforms()

This prevents InstCombine from creating mis-sized dbg.values when
replacing a sequence of casts with a simpler cast. For example, in:

  (fptrunc (floor (fpext X))) -> (floorf X)

We no longer emit dbg.value(X) (with a 32-bit float operand) to describe
(fpext X) (which is a 64-bit float).

This was diagnosed by the debugify check added in r335682.

llvm-svn: 335696

6 years ago[Debugify] Handle failure to get fragment size when checking dbg.values
Vedant Kumar [Wed, 27 Jun 2018 00:47:52 +0000 (00:47 +0000)]
[Debugify] Handle failure to get fragment size when checking dbg.values

It's not possible to get the fragment size of some dbg.values. Teach the
mis-sized dbg.value diagnostic to detect this scenario and bail out.

Tested with:
$ find test/Transforms -print -exec opt -debugify-each -instcombine {} \;

llvm-svn: 335695

6 years ago[X86] Don't store register and memory FMA3 opcodes in the same X86InstrFMA3Group.
Craig Topper [Wed, 27 Jun 2018 00:42:24 +0000 (00:42 +0000)]
[X86] Don't store register and memory FMA3 opcodes in the same X86InstrFMA3Group.

Nothing was using this relationship. By splitting them we no longer need to worry about register or memory entries being empty in a group.

The memory folding tables in X86InstrInfo.cpp can be used to access this relationship if needed.

llvm-svn: 335694

6 years agoFix another bot broken by r335644
Vlad Tsyrklevich [Wed, 27 Jun 2018 00:31:17 +0000 (00:31 +0000)]
Fix another bot broken by r335644

The android sanitizer bot can't resolve the function name in the DSO and
it's not relevant to the test.

llvm-svn: 335693

6 years ago[mips] Explicitly specify the linker emulation for MIPS on FreeBSD.
John Baldwin [Wed, 27 Jun 2018 00:02:16 +0000 (00:02 +0000)]
[mips] Explicitly specify the linker emulation for MIPS on FreeBSD.

FreeBSD's mips64 builds O32 binaries for /usr/lib32 by default and
thus needs to be able to link O32 binaries which requires an explicit
linker emulation.  Go ahead and list all the linker emulation variants
for MIPS so that any supported MIPS ABI binary can be linked by any
linker supporting MIPS.

Reviewed By: atanasyan

Differential Revision: https://reviews.llvm.org/D48507

llvm-svn: 335691

6 years agoUse the API's to get the TargetSP.
Jim Ingham [Tue, 26 Jun 2018 23:54:50 +0000 (23:54 +0000)]
Use the API's to get the TargetSP.

llvm-svn: 335690

6 years agoThe Process class ivar ivar was changed to a weak pointer, but was still _sp.
Jim Ingham [Tue, 26 Jun 2018 23:38:58 +0000 (23:38 +0000)]
The Process class ivar ivar was changed to a weak pointer, but was still _sp.
Fix that to _wp.

llvm-svn: 335689

6 years agoThis is not a debug info sensitive test.
Jim Ingham [Tue, 26 Jun 2018 23:31:44 +0000 (23:31 +0000)]
This is not a debug info sensitive test.

llvm-svn: 335688

6 years agoDiagnose missing 'template' keywords in more cases.
Richard Smith [Tue, 26 Jun 2018 23:20:26 +0000 (23:20 +0000)]
Diagnose missing 'template' keywords in more cases.

We track when we see a name-shaped expression followed by a '<' token
and parse the '<' as a comparison. Then:

 * if we see a token sequence that cannot possibly be an expression but
   can be a template argument (in particular, a type-id) that follows
   either a ',' or the '<', diagnose that the '<' was supposed to start
   a template argument list, and
 * if we see '>()', diagnose that the '<' was supposed to start a
   template argument list.

This only changes the diagnostic for error cases, and in practice
appears to catch the most common cases where a missing 'template'
keyword leads to parse errors within a template.

Differential Revision: https://reviews.llvm.org/D48571

llvm-svn: 335687

6 years ago[clang] Add test dependency on llvm-as
Shoaib Meenai [Tue, 26 Jun 2018 23:18:59 +0000 (23:18 +0000)]
[clang] Add test dependency on llvm-as

r335618 added tests that invoke llvm-as, so we should also ensure that
running clang tests rebuilds llvm-as.

llvm-svn: 335686

6 years ago[analyzer] [tests] Include statistics in tests.
George Karpenkov [Tue, 26 Jun 2018 23:17:35 +0000 (23:17 +0000)]
[analyzer] [tests] Include statistics in tests.

llvm-svn: 335685

6 years agoRevert "[MS] Use mangled names and comdats for string merging with ASan"
Evgeniy Stepanov [Tue, 26 Jun 2018 23:10:48 +0000 (23:10 +0000)]
Revert "[MS] Use mangled names and comdats for string merging with ASan"

Depends on r334313, which has been reverted in r335681.

llvm-svn: 335684

6 years ago[analyzer] Minor cleanups for BugReporter, expose a getter for AnalyzerOptions.
George Karpenkov [Tue, 26 Jun 2018 23:10:05 +0000 (23:10 +0000)]
[analyzer] Minor cleanups for BugReporter, expose a getter for AnalyzerOptions.

llvm-svn: 335683

6 years ago[Debugify] Diagnose mis-sized dbg.values
Vedant Kumar [Tue, 26 Jun 2018 22:46:41 +0000 (22:46 +0000)]
[Debugify] Diagnose mis-sized dbg.values

Report an error in -check-debugify when the size of a dbg.value operand
doesn't match up with the size of the variable it describes.

Eventually this check should be moved into the IR verifier. For the
moment, it's useful to include the check in -check-debugify as a means
of catching regressions and finding existing bugs.

Here are some instances of bugs the new check finds in the -O2 pipeline
(all in InstCombine):

1) A float is used where a double is expected:

ERROR: dbg.value operand has size 32, but its variable has size 64:
call void @llvm.dbg.value(metadata float %expf, metadata !12, metadata
!DIExpression()), !dbg !15

2) An i8 is used where an i32 is expected:

ERROR: dbg.value operand has size 8, but its variable has size 32:
call void @llvm.dbg.value(metadata i8 %t4, metadata !14, metadata
!DIExpression()), !dbg !24

3) A <4 x i32> is used where something twice as large is expected
(perhaps a <4 x i64>, I haven't double-checked):

ERROR: dbg.value operand has size 128, but its variable has size 256:
call void @llvm.dbg.value(metadata <4 x i32> %4, metadata !40, metadata
!DIExpression()), !dbg !95

Differential Revision: https://reviews.llvm.org/D48408

llvm-svn: 335682

6 years agoRevert "[asan] Instrument comdat globals on COFF targets"
Evgeniy Stepanov [Tue, 26 Jun 2018 22:43:48 +0000 (22:43 +0000)]
Revert "[asan] Instrument comdat globals on COFF targets"

Causes false positive ODR violation reports on __llvm_profile_raw_version.

llvm-svn: 335681

6 years ago[ORC] Don't call isa<> on a null value.
Lang Hames [Tue, 26 Jun 2018 22:43:01 +0000 (22:43 +0000)]
[ORC] Don't call isa<> on a null value.

This should fix the recent builder failures in the test-global-ctors.ll testcase.

llvm-svn: 335680

6 years ago[ORC] Fix a missing return value.
Lang Hames [Tue, 26 Jun 2018 22:30:42 +0000 (22:30 +0000)]
[ORC] Fix a missing return value.

llvm-svn: 335677

6 years ago[ELF] Move `// REQUIRES:` line to the top
Fangrui Song [Tue, 26 Jun 2018 22:20:04 +0000 (22:20 +0000)]
[ELF] Move `// REQUIRES:` line to the top

llvm-svn: 335676

6 years ago[JumpThreading] Don't try to rewrite a use if it's already valid.
Michael Zolotukhin [Tue, 26 Jun 2018 22:19:48 +0000 (22:19 +0000)]
[JumpThreading] Don't try to rewrite a use if it's already valid.

Summary:
When recording uses we need to rewrite after cloning a loop we need to
check if the use is not dominated by the original def. The initial
assumption was that the cloned basic block will introduce a new path and
thus the original def will only dominate the use if they are in the same
BB, but as the reproducer from PR37745 shows it's not always the case.

This fixes PR37745.

Reviewers: haicheng, Ka-Ka

Subscribers: hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D48111

llvm-svn: 335675

6 years ago[ELF] Make non-writable non-executable PROGBITS sections closer to .text
Fangrui Song [Tue, 26 Jun 2018 22:13:32 +0000 (22:13 +0000)]
[ELF] Make non-writable non-executable PROGBITS sections closer to .text

This generalizes the old heuristic placing SHT_DYNSYM SHT_DYNSTR first in the readonly SHF_ALLOC segment.

Reviewers: espindola

Subscribers: emaste, arichardson, llvm-commits

Differential Revision: https://reviews.llvm.org/D48406

llvm-svn: 335674

6 years ago[ORC] Add a dependence on MC to LLVMBuild.txt
Lang Hames [Tue, 26 Jun 2018 22:12:02 +0000 (22:12 +0000)]
[ORC] Add a dependence on MC to LLVMBuild.txt

llvm-svn: 335673

6 years ago[MachineOutliner] Emit a warning when using -moutline on unsupported targets
Jessica Paquette [Tue, 26 Jun 2018 22:09:48 +0000 (22:09 +0000)]
[MachineOutliner] Emit a warning when using -moutline on unsupported targets

Instead of just saying "flag unused", we should tell the user that the
outliner isn't (at least officially) supported for some given architecture.

This adds a warning that will state something like

The 'blah' architecture does not support -moutline; flag ignored

when we call -moutline with the 'blah' architecture.

Since the outliner is still mostly an AArch64 thing, any architecture
other than AArch64 will emit this warning.

llvm-svn: 335672

6 years ago[X86] Add test for SDIV by sign bit (minsigned) value
Simon Pilgrim [Tue, 26 Jun 2018 22:03:00 +0000 (22:03 +0000)]
[X86] Add test for SDIV by sign bit (minsigned) value

llvm-svn: 335671

6 years ago[ORC] Add LLJIT and LLLazyJIT, and replace OrcLazyJIT in LLI with LLLazyJIT.
Lang Hames [Tue, 26 Jun 2018 21:35:48 +0000 (21:35 +0000)]
[ORC] Add LLJIT and LLLazyJIT, and replace OrcLazyJIT in LLI with LLLazyJIT.

LLJIT is a prefabricated ORC based JIT class that is meant to be the go-to
replacement for MCJIT. Unlike OrcMCJITReplacement (which will continue to be
supported) it is not API or bug-for-bug compatible, but targets the same
use cases: Simple, non-lazy compilation and execution of LLVM IR.

LLLazyJIT extends LLJIT with support for function-at-a-time lazy compilation,
similar to what was provided by LLVM's original (now long deprecated) JIT APIs.

This commit also contains some simple utility classes (CtorDtorRunner2,
LocalCXXRuntimeOverrides2, JITTargetMachineBuilder) to support LLJIT and
LLLazyJIT.

Both of these classes are works in progress. Feedback from JIT clients is very
welcome!

llvm-svn: 335670

6 years agoAMDGPU: Silence unused warnings in waitcnt insertion pass in release build
Konstantin Zhuravlyov [Tue, 26 Jun 2018 21:33:38 +0000 (21:33 +0000)]
AMDGPU: Silence unused warnings in waitcnt insertion pass in release build

Differential Revision: https://reviews.llvm.org/D48607

llvm-svn: 335669

6 years ago[X86][AsmParser] Recommit r335658
Jessica Paquette [Tue, 26 Jun 2018 21:30:34 +0000 (21:30 +0000)]
[X86][AsmParser] Recommit r335658

Recommit of r335658 so that it does not change the behaviour of any
existing error output.

llvm-svn: 335668

6 years agoRename skipDebugInfo -> skipDebugIntrinsics, NFC
Vedant Kumar [Tue, 26 Jun 2018 21:16:59 +0000 (21:16 +0000)]
Rename skipDebugInfo -> skipDebugIntrinsics, NFC

This addresses post-commit feedback about the name 'skipDebugInfo' being
misleading. This name could be interpreted as meaning 'a function that
skips instructions with debug locations'.

The new name, 'skipDebugIntrinsics', makes it clear that this function
only skips debug info intrinsics.

Thanks to Adrian Prantl for pointing this out!

llvm-svn: 335667

6 years ago[analyzer] Do not run visitors until the fixpoint, run only once.
George Karpenkov [Tue, 26 Jun 2018 21:12:08 +0000 (21:12 +0000)]
[analyzer] Do not run visitors until the fixpoint, run only once.

In the current implementation, we run visitors until the fixed point is
reached.
That is, if a visitor adds another visitor, the currently processed path
is destroyed, all diagnostics is discarded, and it is regenerated again,
until it's no longer modified.
This pattern has a few negative implications:

 - This loop does not even guarantee to terminate.
   E.g. just imagine two visitors bouncing a diagnostics around.
 - Performance-wise, e.g. for sqlite3 all visitors are being re-run at
   least 10 times for some bugs.
   We have already seen a few reports where it leads to timeouts.
 - If we want to add more computationally intense visitors, this will
   become worse.
 - From architectural standpoint, the current layout requires copying
   visitors, which is conceptually wrong, and can be annoying (e.g. no
   unique_ptr on visitors allowed).

The proposed change is a much simpler architecture: the outer loop
processes nodes upwards, and whenever the visitor is added it only
processes current nodes and above, thus guaranteeing termination.

Differential Revision: https://reviews.llvm.org/D47856

llvm-svn: 335666

6 years ago[ORC] Allow IRTransformLayer2's transform to be modified after initialization.
Lang Hames [Tue, 26 Jun 2018 20:59:51 +0000 (20:59 +0000)]
[ORC] Allow IRTransformLayer2's transform to be modified after initialization.

Also give the constructor's transform parameter a default no-op transform value.

llvm-svn: 335665

6 years ago[ORC] Reset AsynchronousSymbolQuery's NotifySymbolsResolved callback on error.
Lang Hames [Tue, 26 Jun 2018 20:59:50 +0000 (20:59 +0000)]
[ORC] Reset AsynchronousSymbolQuery's NotifySymbolsResolved callback on error.

AsynchronousSymbolQuery::canStillFail checks the value of the callback to
prevent sending it redundant error notifications, so we need to reset it after
running it.

llvm-svn: 335664

6 years ago[ORC] Move the VSOList typedef out of VSO.
Lang Hames [Tue, 26 Jun 2018 20:59:49 +0000 (20:59 +0000)]
[ORC] Move the VSOList typedef out of VSO.

llvm-svn: 335663

6 years ago[ORC] Add a FIXME.
Lang Hames [Tue, 26 Jun 2018 20:59:49 +0000 (20:59 +0000)]
[ORC] Add a FIXME.

llvm-svn: 335662

6 years ago[ORC] Fix a FIXME by moving MangleAndInterner to Core.h.
Lang Hames [Tue, 26 Jun 2018 20:59:46 +0000 (20:59 +0000)]
[ORC] Fix a FIXME by moving MangleAndInterner to Core.h.

llvm-svn: 335661