16 months ago[gn build] Add missing llvm-lipo dep to check-lld
Reid Kleckner [Mon, 29 Jun 2020 19:24:10 +0000 (12:24 -0700)]
[gn build] Add missing llvm-lipo dep to check-lld

Updates gn files for 918948db4dc8718cb7aae8765653c27cba3cfe86

16 months ago[darwin][driver] isMacosxVersionLT should check against the minimum supported OS...
Alex Lorenz [Mon, 29 Jun 2020 17:23:16 +0000 (10:23 -0700)]
[darwin][driver] isMacosxVersionLT should check against the minimum supported OS version

This change ensures that the Darwin driver doesn't add unsupported libraries to the link
invocation when linking the Apple Silicon macOS slice.


Differential Revision: https://reviews.llvm.org/D82696

16 months agoX86: Upgrade a test to not rely on byval pointee type
Matt Arsenault [Fri, 26 Jun 2020 19:18:30 +0000 (15:18 -0400)]
X86: Upgrade a test to not rely on byval pointee type

16 months agoLowerConstantIntrinsics: Fix missing test for byval behavior
Matt Arsenault [Mon, 29 Jun 2020 18:21:46 +0000 (14:21 -0400)]
LowerConstantIntrinsics: Fix missing test for byval behavior

16 months agoX86: Use MOV32r0 pseudo instead of directly emitting xor
Matt Arsenault [Sun, 28 Jun 2020 14:46:56 +0000 (10:46 -0400)]
X86: Use MOV32r0 pseudo instead of directly emitting xor

This was producing reg = xor undef reg, undef reg. This looks similar
to a use of a value to define itself, and I want to disallow undef
uses for SSA virtual registers. If this were to use implicit_def,
there's no guarantee the two operands end up using the same register
(I think no guarantee exists even if the two operands start out as the
same register, but this was violated when I switched this to use an
explicit implicit_def). The MOV32r0 pseudo evidently exists to handle
this case, so use it instead. This was more work than I expected for
the 64-bit case, but I didn't see any helper for materializing a
64-bit 0.

16 months agoSilence unused var warning in NDEBUG build
Reid Kleckner [Mon, 29 Jun 2020 18:39:49 +0000 (11:39 -0700)]
Silence unused var warning in NDEBUG build

16 months ago[gn build] Port 9963d93b073
LLVM GN Syncbot [Mon, 29 Jun 2020 18:36:28 +0000 (18:36 +0000)]
[gn build] Port 9963d93b073

16 months agoAdd optimization to basic_string::assign for compile-time known constant values.
Martijn Vels [Fri, 19 Jun 2020 18:24:03 +0000 (14:24 -0400)]
Add optimization to basic_string::assign for compile-time known constant values.

This change optimizes the assign() methods for string where either the contents or lengths are compile time known constants. For small strings (< min_cap) we can execute the assignment entirely inline. For strings up to 128 bytes we allow the compiler to efficiently inline the copy operation after we call the offline __resize<>() method. Short / long branches are taken at the call site for better branch prediction and allowing FDO optimizations.

Benchmarks (unstable / google perflab):
name                                                old time/op             new time/op             delta
BM_StringAssignAsciiz_Empty_Opaque                  5.69ns ± 7%             5.97ns ± 7%     ~             (p=0.056 n=5+5)
BM_StringAssignAsciiz_Empty_Transparent             5.39ns ± 7%             0.79ns ± 8%  -85.36%          (p=0.008 n=5+5)
BM_StringAssignAsciiz_Small_Opaque                  11.2ns ± 5%             11.0ns ± 6%     ~             (p=0.548 n=5+5)
BM_StringAssignAsciiz_Small_Transparent             10.1ns ± 7%              1.0ns ± 8%  -89.76%          (p=0.008 n=5+5)
BM_StringAssignAsciiz_Large_Opaque                  23.5ns ± 7%             23.8ns ± 7%     ~             (p=0.841 n=5+5)
BM_StringAssignAsciiz_Large_Transparent             21.4ns ± 7%             12.7ns ± 7%  -40.83%          (p=0.008 n=5+5)
BM_StringAssignAsciiz_Huge_Opaque                    336ns ± 4%              327ns ± 7%     ~             (p=0.421 n=5+5)
BM_StringAssignAsciiz_Huge_Transparent               331ns ± 5%              324ns ± 7%     ~             (p=0.548 n=5+5)
BM_StringAssignAsciizMix_Opaque                     13.6ns ±10%             13.7ns ± 9%     ~             (p=0.690 n=5+5)
BM_StringAssignAsciizMix_Transparent                12.9ns ± 8%              3.6ns ± 8%  -71.82%          (p=0.008 n=5+5)

Reviewers: EricWF, #libc!

Subscribers: jfb, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D82221

16 months ago[IndVars] Regenerate test checks (NFC)
Nikita Popov [Mon, 29 Jun 2020 18:33:50 +0000 (20:33 +0200)]
[IndVars] Regenerate test checks (NFC)

16 months agoRevert "[ADT] Support const-qualified unique_functions"
Nikita Popov [Mon, 29 Jun 2020 18:26:22 +0000 (20:26 +0200)]
Revert "[ADT] Support const-qualified unique_functions"

This reverts commit 01bf8cdf5fa9bc71869e15e5e351b2b68c39feb6.

Breaks the build:

llvm/include/llvm/ADT/FunctionExtras.h:223:7: error: explicit template argument list not allowed
  223 |       Callbacks<CallableT, CalledAs, EnableIfTrivial<CallableT>>;

16 months ago[clangd] Config: config struct propagated through Context
Sam McCall [Thu, 25 Jun 2020 21:42:36 +0000 (23:42 +0200)]
[clangd] Config: config struct propagated through Context

This introduces the "semantic form" of config exposed to features,
contrasted with the "syntactic form" exposed to users in e9fb1506b83d.

The two are not connected, CompiledFragment and Provider will bridge that gap.
Nor is configuration actually set: that needs changes to ClangdServer,
TUScheduler, and BackgroundQueue.

Reviewers: hokein, kadircet

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82606

16 months ago[DEBUGINFO]Add a test for packed bitfields, NFC.
Alexey Bataev [Mon, 29 Jun 2020 17:30:29 +0000 (13:30 -0400)]
[DEBUGINFO]Add a test for packed bitfields, NFC.

16 months ago[ADT] Support const-qualified unique_functions
Sam McCall [Thu, 25 Jun 2020 16:25:53 +0000 (18:25 +0200)]
[ADT] Support const-qualified unique_functions

This technique should extend to rvalue-qualified etc, but I didn't add any.
I removed "volatile" from the future plans, which seems... speculative at best.

While here I moved the callbacks object out of the constructor into a
variable template, which I believe addresses the fixme there about unused

(I'm not a template guru, so it's always possible the old version was designed
for compile-time performance in a way I'm missing)

Reviewers: kadircet

Subscribers: dexonsmith, llvm-commits, chandlerc

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82581

16 months ago[SVE] Remove calls to VectorType::getNumElements from X86
Christopher Tetreault [Mon, 29 Jun 2020 17:30:43 +0000 (10:30 -0700)]
[SVE] Remove calls to VectorType::getNumElements from X86

Reviewers: efriedma, RKSimon, craig.topper, fpetrogalli, c-rhodes

Reviewed By: RKSimon

Subscribers: tschuett, hiraditya, rkruppe, psnobl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82508

16 months ago[runtimes] Remove the ability to select the old libc++ testing format
Louis Dionne [Fri, 26 Jun 2020 04:55:29 +0000 (00:55 -0400)]
[runtimes] Remove the ability to select the old libc++ testing format

As announced on libcxx-dev at [1], the old libc++ testing format is being
removed in favour of the new one. Follow-up commits will clean up the
code that is dead after the removal of this option.

[1]: http://lists.llvm.org/pipermail/libcxx-dev/2020-June/000885.html

16 months ago[SVE] Remove calls to VectorType::getNumElements from mlir
Christopher Tetreault [Mon, 29 Jun 2020 17:15:00 +0000 (10:15 -0700)]
[SVE] Remove calls to VectorType::getNumElements from mlir

Reviewers: efriedma, ftynse, rriddle

Reviewed By: ftynse, rriddle

Subscribers: tschuett, rkruppe, psnobl, mehdi_amini, rriddle, jpienaar, shauheen, antiagainst, nicolasvasilache, arpith-jacob, mgester, lucyrfox, aartbik, liufengdb, stephenneuendorffer, Joonsoo, grosul1, Kayjukh, jurahul, msifontes

Tags: #mlir

Differential Revision: https://reviews.llvm.org/D82583

16 months ago[PowerPC] Fix crash for shuffle canonicalization with elt 0 from RHS
Nemanja Ivanovic [Mon, 29 Jun 2020 16:37:03 +0000 (11:37 -0500)]
[PowerPC] Fix crash for shuffle canonicalization with elt 0 from RHS

Commit 1fed131660b2 assumed that shuffle vector canonicalization will
always ensure that the shuffle mask will be ordered so that element
zero comes from the LHS vector. However there is code out there for
which this is not the case. This patch simply removes that unsafe
assumption and makes the code work regardless of the source of the
first element.

16 months ago[AArch64][SVE] Add bfloat16 to outstanding tuple vector intrinsics
Cullen Rhodes [Fri, 26 Jun 2020 16:35:00 +0000 (16:35 +0000)]
[AArch64][SVE] Add bfloat16 to outstanding tuple vector intrinsics

* svget2/3/4
* svset2/3/4
* svcreate2/3/4
* svundef/2/3/4

Reviewers: sdesmalen, kmclaughlin, fpetrogalli, efriedma

Reviewed By: fpetrogalli

Differential Revision: https://reviews.llvm.org/D82665

16 months ago[analyzer][Z3-refutation] Fix a refutation BugReporterVisitor bug
Balazs Benics [Mon, 29 Jun 2020 16:51:24 +0000 (18:51 +0200)]
[analyzer][Z3-refutation] Fix a refutation BugReporterVisitor bug

FalsePositiveRefutationBRVisitor had a bug where the constraints were not
properly collected thus crosschecked with Z3.
This patch demonstratest and fixes that bug.

The visitor wanted to collect all the constraints on a BugPath.
Since it is a visitor, it stated the visitation of the BugPath with the node
before the ErrorNode. As a final step, it visited the ErrorNode explicitly,
before it processed the collected constraints.

In principle, the ErrorNode should have visited before every other node.
Since the constraints were collected into a map, mapping each symbol to its
RangeSet, if the map already had a mapping with the symbol, then it was skipped.

This behavior was flawed if:
We already had a constraint on a symbol, but at the end in the ErrorNode we have
a tighter constraint on that. Therefore, this visitor would not utilize that
tighter constraint during the crosscheck validation.

Differential Revision: https://reviews.llvm.org/D78457

16 months ago[AArch64][SVE] clang: Add missing svbfloat16_t tests
Cullen Rhodes [Fri, 26 Jun 2020 17:25:56 +0000 (17:25 +0000)]
[AArch64][SVE] clang: Add missing svbfloat16_t tests

Patch adds tests for mangling of svbfloat16_t and several other type
related tests.

Reviewers: sdesmalen, kmclaughlin, fpetrogalli, efriedma

Reviewed By: sdesmalen, fpetrogalli

Differential Revision: https://reviews.llvm.org/D82668

16 months ago[Sphinx] Support older recommonmark versions.
Jonas Devlieghere [Mon, 29 Jun 2020 16:44:26 +0000 (09:44 -0700)]
[Sphinx] Support older recommonmark versions.

The "new way" of enabling recommonmark is only supported in recommonmark
0.5 and later. Use the deprecated approach with versions of Sphinx that
still support it.

If I understand correctly there's no way to use older versions of
recommonmark (<0.5) with newer versions of Sphinx (>3.0) because the old
approach got removed.

Differential revision: https://reviews.llvm.org/D75284

16 months ago[libc++] Enable tests and documentation by default when building standalone
Louis Dionne [Mon, 29 Jun 2020 16:39:39 +0000 (12:39 -0400)]
[libc++] Enable tests and documentation by default when building standalone

Since we can always find the rest of the LLVM tree, we can always run the
tests in the standalone mode. Do it so that the default behavior is the
same in the standalone and non-standalone modes.

16 months ago[libc++] Provide a default LLVM_PATH when building standalone
Louis Dionne [Mon, 29 Jun 2020 16:25:10 +0000 (12:25 -0400)]
[libc++] Provide a default LLVM_PATH when building standalone

Since we require that libc++ is built as part of the monorepo layout, we
can assume the path of the rest of LLVM and avoid requiring that LLVM_PATH
be set explicitly.

16 months ago[LLDB] skip TestCreateDuringInstructionStep on aarch64/linux
Muhammad Omair Javaid [Mon, 29 Jun 2020 14:29:23 +0000 (19:29 +0500)]
[LLDB] skip TestCreateDuringInstructionStep on aarch64/linux

TestCreateDuringInstructionStep have started failing again on
aarch64/linux after moving to new machine. I am going mark it skipped
for aarch64/linux.

16 months ago[gn build] Port fe0a555aa3c
LLVM GN Syncbot [Mon, 29 Jun 2020 16:19:53 +0000 (16:19 +0000)]
[gn build] Port fe0a555aa3c

16 months ago[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor
Balazs Benics [Mon, 29 Jun 2020 16:18:43 +0000 (18:18 +0200)]
[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor

Adds the test infrastructure for testing the FalsePositiveRefutationBRVisitor.
It will be extended in the D78457 patch, which demonstrates and fixes a bug in
the visitor.

Differential Revision: https://reviews.llvm.org/D78704

16 months agoCorrectly report Changed status in FoldBranchToCommonDest
serge-sans-paille [Mon, 29 Jun 2020 10:07:26 +0000 (12:07 +0200)]
Correctly report Changed status in FoldBranchToCommonDest

It's possible for the first loop trip(s) to set the `Changed` Status, and to a
later one to early exit, in which case `Changed` must be return.

Differential Revision: https://reviews.llvm.org/D82753

16 months ago[sve][acle] Implement some of the C intrinsics for brain float.
Francesco Petrogalli [Fri, 19 Jun 2020 21:27:46 +0000 (21:27 +0000)]
[sve][acle] Implement some of the C intrinsics for brain float.

The following intrinsics have been extended to support brain float types:

svbfloat16_t svclasta[_bf16](svbool_t pg, svbfloat16_t fallback, svbfloat16_t data)
bfloat16_t svclasta[_n_bf16](svbool_t pg, bfloat16_t fallback, svbfloat16_t data)
bfloat16_t svlasta[_bf16](svbool_t pg, svbfloat16_t op)

svbfloat16_t svclastb[_bf16](svbool_t pg, svbfloat16_t fallback, svbfloat16_t data)
bfloat16_t svclastb[_n_bf16](svbool_t pg, bfloat16_t fallback, svbfloat16_t data)
bfloat16_t svlastb[_bf16](svbool_t pg, svbfloat16_t op)

svbfloat16_t svdup[_n]_bf16(bfloat16_t op)
svbfloat16_t svdup[_n]_bf16_m(svbfloat16_t inactive, svbool_t pg, bfloat16_t op)
svbfloat16_t svdup[_n]_bf16_x(svbool_t pg, bfloat16_t op)
svbfloat16_t svdup[_n]_bf16_z(svbool_t pg, bfloat16_t op)

svbfloat16_t svdupq[_n]_bf16(bfloat16_t x0, bfloat16_t x1, bfloat16_t x2, bfloat16_t x3, bfloat16_t x4, bfloat16_t x5, bfloat16_t x6, bfloat16_t x7)
svbfloat16_t svdupq_lane[_bf16](svbfloat16_t data, uint64_t index)

svbfloat16_t svinsr[_n_bf16](svbfloat16_t op1, bfloat16_t op2)

Reviewers: sdesmalen, kmclaughlin, c-rhodes, ctetreau, efriedma

Subscribers: tschuett, hiraditya, rkruppe, psnobl, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D82345

16 months ago[NFC] Fixed ignored .hip test.
dfukalov [Mon, 29 Jun 2020 13:34:00 +0000 (16:34 +0300)]
[NFC] Fixed ignored .hip test.

Reviewers: hliao

Reviewed By: hliao

Subscribers: yaxunl, cfe-commits, llvm-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82764

16 months ago[libc++] Do not try creating llvm-lit when LIBCXX_INCLUDE_TESTS is OFF in the standal...
Louis Dionne [Mon, 29 Jun 2020 15:51:15 +0000 (11:51 -0400)]
[libc++] Do not try creating llvm-lit when LIBCXX_INCLUDE_TESTS is OFF in the standalone build

Doing so doesn't work reliably, since it relies on LLVM_* implementation
detail variables being set. Furthermore, since we rely on the lit.site.cfg
being generated, running the tests requires LIBCXX_INCLUDE_TESTS=ON anyway.

16 months ago[AMDGPU] Moving SI_RETURN_TO_EPILOG handling out of SIInsertSkips.
Christudasan Devadasan [Wed, 17 Jun 2020 08:39:04 +0000 (14:09 +0530)]
[AMDGPU] Moving SI_RETURN_TO_EPILOG handling out of SIInsertSkips.

For now, moving it to SIPreEmitPeephole.
Should find a right place to have this code.

Reviewed By: nhaehnle

Differential revision: https://reviews.llvm.org/D77544

16 months agoRecursiveASTVisitor: inline a macro that is only used once
Dmitri Gribenko [Mon, 29 Jun 2020 15:05:43 +0000 (17:05 +0200)]
RecursiveASTVisitor: inline a macro that is only used once

Reviewers: eduucaldas, ymandel

Reviewed By: ymandel

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82760

16 months ago[clang-tidy][NFC] Remove unnecessary includes throughout clang-tidy header files
Nathan James [Mon, 29 Jun 2020 15:05:51 +0000 (16:05 +0100)]
[clang-tidy][NFC] Remove unnecessary includes throughout clang-tidy header files

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D82661

16 months agoCompile the RecursiveASTVisitor callbacks test with "/bigobj"
Dmitri Gribenko [Mon, 29 Jun 2020 15:01:58 +0000 (17:01 +0200)]
Compile the RecursiveASTVisitor callbacks test with "/bigobj"

This file was exceeding a limit in MSVC:

fatal error C1128: number of sections exceeded object file format limit: compile with /bigobj

Reviewers: erichkeane

Reviewed By: erichkeane

Subscribers: jmorse, gribozavr2, mgorny, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82766

16 months ago[ARM] Better reductions
David Green [Mon, 29 Jun 2020 12:53:19 +0000 (13:53 +0100)]
[ARM] Better reductions

MVE has native reductions for integer add and min/max. The others need
to be expanded to a series of extract's and scalar operators to reduce
the vector into a single scalar. The default codegen for that expands
the reduction into a series of in-order operations.

This modifies that to something more suitable for MVE. The basic idea is
to use vector operations until there are 4 remaining items then switch
to pairwise operations. For example a v8f16 fadd reduction would become:
Z = ADD(X, Y)
z0 = Z[0] + Z[1]
z1 = Z[2] + Z[3]
return z0 + z1

The awkwardness (there is always some) comes in from something like a
v4f16, which is first legalized by adding identity values to the extra
lanes of the reduction, and which can then not be optimized away through
the vrev; fadd combo, the inserts remain. I've made sure they custom
lower so that we can produce the pairwise additions before the extra
values are added.

Differential Revision: https://reviews.llvm.org/D81397

16 months agoFix MSVC truncation of constant value warning.
Simon Pilgrim [Mon, 29 Jun 2020 14:59:53 +0000 (15:59 +0100)]
Fix MSVC truncation of constant value warning.

16 months agoRevert "[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor"
Dmitri Gribenko [Mon, 29 Jun 2020 14:59:40 +0000 (16:59 +0200)]
Revert "[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor"

This reverts commit e22cae32c5c4cf8c49b674cea34c105a6cb015f9. It broke
the build:

FalsePositiveRefutationBRVisitorTest.cpp:112:3: error: use of undeclared identifier 'LLVM_WITH_Z3'

16 months ago[llvm-objcopy] Fix "unused-function" warning in NDEBUG builds
Bjorn Pettersson [Mon, 29 Jun 2020 14:56:35 +0000 (16:56 +0200)]
[llvm-objcopy] Fix "unused-function" warning in NDEBUG builds

Fixup of commit b925ca37a8f28851 to allow building with
-Werror -Wunused-function.

16 months ago[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor
Balazs Benics [Tue, 21 Apr 2020 13:44:34 +0000 (15:44 +0200)]
[analyzer][NFC] Add unittest for FalsePositiveRefutationBRVisitor

Adds the test infrastructure for testing the FalsePositiveRefutationBRVisitor.
It will be extended in the D78457 patch, which demonstrates and fixes a bug in
the visitor.

Differential Revision: https://reviews.llvm.org/D78704

16 months ago[X86][SSE] MatchVectorAllZeroTest - handle OR vector reductions (REAPPLIED)
Simon Pilgrim [Mon, 29 Jun 2020 14:24:49 +0000 (15:24 +0100)]
[X86][SSE] MatchVectorAllZeroTest - handle OR vector reductions (REAPPLIED)

This patch extends MatchVectorAllZeroTest to handle OR vector reduction patterns where the result is compared against zero.

Reapplied with a fix for a chromium regression due to a missing isNullConstant() check in combineSetCC: https://bugs.chromium.org/p/chromium/issues/detail?id=1097758

Fixes PR45378

Differential Revision: https://reviews.llvm.org/D81547

16 months ago[PowerPC] Don't combine SCALAR_TO_VECTOR without VSX
Nemanja Ivanovic [Mon, 29 Jun 2020 10:14:30 +0000 (05:14 -0500)]
[PowerPC] Don't combine SCALAR_TO_VECTOR without VSX

Most of the patterns for PPCISD::SCALAR_TO_VECTOR_PERMUTED require
VSX. So don't emit them if the subtarget doesn't have VSX.
This resolves the issue reported on

16 months ago[lldb/Test] Skip TestVSCode_disconnect on Darwin
Jonas Devlieghere [Mon, 29 Jun 2020 14:47:37 +0000 (07:47 -0700)]
[lldb/Test] Skip TestVSCode_disconnect on Darwin

It's failing on the sanitized bot on GreenDragon.

16 months agoInliner: Add missing test for alignment assume with byval
Matt Arsenault [Fri, 26 Jun 2020 16:00:44 +0000 (12:00 -0400)]
Inliner: Add missing test for alignment assume with byval

No tests were stressing the behavior for hasPassPointeeByValueAttr.

16 months ago[VectorCombine] try to form vector compare and binop to eliminate scalar ops
Sanjay Patel [Mon, 29 Jun 2020 14:29:59 +0000 (10:29 -0400)]
[VectorCombine] try to form vector compare and binop to eliminate scalar ops

binop i1 (cmp Pred (ext X, Index0), C0), (cmp Pred (ext X, Index1), C1)
vcmp = cmp Pred X, VecC
ext (binop vNi1 vcmp, (shuffle vcmp, Index1)), Index0

This is a larger pattern than the existing extractelement folds because we can't
reasonably vectorize the sub-patterns with constants based on cost model calcs
(it doesn't usually make sense to replace a single extracted scalar op with
constant operand with a vector op).

I salvaged as much of the existing logic as I could, but there might be better
ways to share and reduce code.

The motivating case from PR43745:
...is the special case of a 2-way reduction. We tried to get SLP to handle that
particular pattern in D59710, but that caused crashing and regressions.
This patch is more general, but hopefully safer.

The v2f64 test with SSE2 surprised me - the cost model accounting looks like this:
OldCost = 0 (free extract of f64 at index 0) + 1 (extract of f64 at index 1) + 2 (scalar fcmps) + 1 (and of bools) = 4
NewCost = 2 (vector fcmp) + 1 (shuffle) + 1 (vector 'and') + 1 (extract of bool) = 5

Differential Revision: https://reviews.llvm.org/D82474

16 months ago[mlir] Clean up NVVM intrinsics definitions a little.
Stephan Herhut [Mon, 29 Jun 2020 10:01:53 +0000 (12:01 +0200)]
[mlir] Clean up NVVM intrinsics definitions a little.

Differential Revision: https://reviews.llvm.org/D82750

16 months ago[clang-tidy] Fix hicpp-named-paramater
Nathan James [Mon, 29 Jun 2020 14:28:07 +0000 (15:28 +0100)]
[clang-tidy] Fix hicpp-named-paramater

Currently this alias instantiates the readability-identifier-naming check, just swap it out to use the readability-named-paramater check.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D82711

16 months ago[CodeGen] Use the common semantic for fixed-point codegen, not the result semantic.
Bevin Hansson [Fri, 26 Jun 2020 14:32:30 +0000 (16:32 +0200)]
[CodeGen] Use the common semantic for fixed-point codegen, not the result semantic.

Using the result semantic is wrong in some cases, such as
unsigned fixed-point + signed integer. In this case, the
result semantic is unsigned and the common semantic is

Reviewers: leonardchan

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82662

16 months agoAMDGPU: Use IsSSA property check instead of asserting on isSSA
Matt Arsenault [Sun, 28 Jun 2020 20:11:48 +0000 (16:11 -0400)]
AMDGPU: Use IsSSA property check instead of asserting on isSSA

Also fix an SSA violation in a test the MIRParser/verifier fails to
catch. It's illegal to define a subregister in SSA. For the purpose of
the test, it just needs to define the super-register to use the
subregister in the use operand.

16 months ago[clang-format] Preserve whitespace in selected macros
Jake Merdich [Fri, 26 Jun 2020 01:59:33 +0000 (21:59 -0400)]
[clang-format] Preserve whitespace in selected macros


When the c preprocessor stringizes tokens, the generated string literals
are affected by the whitespace. This means clang-format can affect
codegen silently, adding spaces and newlines to strings.  Practically
speaking, the vast majority of cases will be harmless, only affecting
single identifiers or debug macros.

In the interest of doing no harm in other cases though, this introduces
a blacklist option 'WhitespaceSensitiveMacros', which contains a list of
names of function-like macros whose contents should not be touched by
clang-format, period. Clang-format can't automatically detect these
without a real compile context, so users will have to specify it
explicitly (it still beats clang-format off'ing at every invocation).


Subscribers: kristof.beyls, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82620

16 months ago[VectorCombine] refactor - make helper function for extract to shuffle logic; NFC
Sanjay Patel [Mon, 29 Jun 2020 13:47:13 +0000 (09:47 -0400)]
[VectorCombine] refactor - make helper function for extract to shuffle logic; NFC

Preliminary for D82474

16 months ago[gn build] Port 2cb0644f90b
LLVM GN Syncbot [Mon, 29 Jun 2020 13:37:16 +0000 (13:37 +0000)]
[gn build] Port 2cb0644f90b

16 months ago[RISCV] Split the pseudo instruction splitting pass
Luís Marques [Mon, 29 Jun 2020 10:03:26 +0000 (11:03 +0100)]
[RISCV] Split the pseudo instruction splitting pass

Extracts the atomic pseudo-instructions' splitting from `riscv-expand-pseudo`
/ `RISCVExpandPseudo` into its own pass, `riscv-expand-atomic-pseudo` /
`RISCVExpandAtomicPseudo`. This allows for the expansion of atomic operations
to continue to happen late (the new pass is added in `addPreEmitPass2`, so
those expansions continue to happen in the same place), while the remaining
pseudo-instructions can now be expanded earlier and benefit from more
optimization passes. The nonatomics pass is now added in `addPreSched2`.

Differential Revision: https://reviews.llvm.org/D79635

16 months ago[Analyzer][StreamChecker] Use BugType instead of BuiltinBug (NFC) .
Balázs Kéri [Mon, 29 Jun 2020 12:35:00 +0000 (14:35 +0200)]
[Analyzer][StreamChecker] Use BugType instead of BuiltinBug (NFC) .

I do not like the BuiltinBug class.
And it takes no SuppressOnSink parameter that may be needed in the future.

Reviewers: Szelethus, baloghadamsoftware, gamesh411

Reviewed By: Szelethus

Subscribers: rnkovacs, xazax.hun, baloghadamsoftware, szepet, a.sidorin, mikhail.ramalho, Szelethus, donat.nagy, dkrupp, gamesh411, Charusso, martong, ASDenysPetrov, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82741

16 months ago[lldb] Deduplicate Scalar integral getters
Pavel Labath [Mon, 29 Jun 2020 12:55:36 +0000 (14:55 +0200)]
[lldb] Deduplicate Scalar integral getters

These functions all follow the same pattern. Use template functions to

16 months ago[OpenCL] Reject block arguments
Sven van Haastregt [Mon, 29 Jun 2020 13:13:12 +0000 (14:13 +0100)]
[OpenCL] Reject block arguments

OpenCL 2.0 does not allow block arguments, primarily because it is
difficult to support function pointers on the various architectures
that OpenCL targets.  Clang was still accepting them.

Rename and reuse the `err_opencl_half_param` diagnostic.

Fixes PR46324.

Differential Revision: https://reviews.llvm.org/D82313

16 months ago[NFC] Fix typos
Guillaume Chatelet [Mon, 29 Jun 2020 13:00:37 +0000 (13:00 +0000)]
[NFC] Fix typos

16 months ago[gn build] Port b56b467a9a8
LLVM GN Syncbot [Mon, 29 Jun 2020 12:53:46 +0000 (12:53 +0000)]
[gn build] Port b56b467a9a8

16 months ago[ADT] Add Bitfield utilities
Guillaume Chatelet [Mon, 29 Jun 2020 12:48:44 +0000 (12:48 +0000)]
[ADT] Add Bitfield utilities

There are places in LLVM where we need to pack typed fields into opaque values.
For instance, the `XXXInst` classes in `llvm/include/llvm/IR/Instructions.h` that extract informations from `Value::SubclassData` via `getSubclassDataFromInstruction()`.
The bit twiddling is done manually: this impairs readability and prevent consistent handling of out of range values (e.g. https://github.com/llvm/llvm-project/blob/435b458ad0a4630e6126246a6865748104ccad06/llvm/include/llvm/IR/Instructions.h#L564)
More importantly, the bit pattern is scattered throughout the implementation making it hard to pack additionnal fields or check for overlapping bits.

Design decisions:
The Bitfield structs are to be declared together so it is clear which bits are used or not.
The code is designed with simplicity in mind, hence a few limitations:
 - Storage is limited to a single integer,
 - Enum values have to be `unsigned`,
 - Storage type has to be `unsigned`,
 - There are no automatic detection of overlapping fields (packed bitfield declaration should help though),
 - The interface is C like so `storage` needs to be passed in everytime (code is simpler and lifetime considerations more obvious)

RFC: http://lists.llvm.org/pipermail/llvm-dev/2020-June/142196.html

Differential Revision: https://reviews.llvm.org/D81580

16 months agoAdd intrinsic helper function
Sebastian Neubauer [Fri, 12 Jun 2020 09:48:36 +0000 (11:48 +0200)]
Add intrinsic helper function

It simplifies getting generic argument types from intrinsics.

Differential Revision: https://reviews.llvm.org/D81084

16 months ago[AArch64][SVE] NFCI: Choose consistent naming for predicated SDAG nodes
Sander de Smalen [Mon, 29 Jun 2020 10:41:22 +0000 (11:41 +0100)]
[AArch64][SVE] NFCI: Choose consistent naming for predicated SDAG nodes

This patch proposes a naming convention for operations that take
a general predicate (and are thus predicated) that specifies
what happens to the false lanes.

Currently the _PRED suffix is used, which doesn't really say much other
than that it takes a predicate. In some instances this means it has
merging predication and in other cases it means zeroing-predication.

This patch also changes the order of operands to
AArch64ISD::DUP_MERGE_PASSTHRU, to pass the predicate as the first
operand, which is in line with all other predicates nodes. It takes the
passthru value as an explicit passthru value, which is always passed as
the last operand.

Reviewers: paulwalker-arm, cameron.mcinally, eli.friedman, dancgr, efriedma

Reviewed By: paulwalker-arm

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D81850

16 months ago[NFC] Introduce a helper in BasicTTIImpl.h to cast to T
Guillaume Chatelet [Mon, 29 Jun 2020 12:16:25 +0000 (12:16 +0000)]
[NFC] Introduce a helper in BasicTTIImpl.h to cast to T

 This patch makes access to `this` as a `T` uniform accross the file.

Differential Revision: https://reviews.llvm.org/D82648

16 months ago[Driver] When forcing a crash print the bug report message
John Brawn [Mon, 29 Jun 2020 12:13:12 +0000 (13:13 +0100)]
[Driver] When forcing a crash print the bug report message

Commit a945037e8fd0c30e250a62211469eea6765a36ae moved the printing of the
"PLEASE submit a bug report" message to the crash handler, but that means we
don't print it when forcing a crash using FORCE_CLANG_DIAGNOSTICS_CRASH. Fix
this by adding a function to get the bug report message and printing it when
forcing a crash.

Differential Revision: https://reviews.llvm.org/D81672

16 months ago[Alignment][NFC] Migrate AMDGPU backend to Align
Guillaume Chatelet [Mon, 29 Jun 2020 11:56:06 +0000 (11:56 +0000)]
[Alignment][NFC] Migrate AMDGPU backend to Align

This patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Differential Revision: https://reviews.llvm.org/D82743

16 months ago[Alignment][NFC] migrate DataLayout::getPreferredAlignment
Guillaume Chatelet [Mon, 29 Jun 2020 11:24:36 +0000 (11:24 +0000)]
[Alignment][NFC] migrate DataLayout::getPreferredAlignment

This patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

Differential Revision: https://reviews.llvm.org/D82752

16 months ago[X86] Add vector support to targetShrinkDemandedConstant for OR/XOR opcodes
Simon Pilgrim [Mon, 29 Jun 2020 11:18:27 +0000 (12:18 +0100)]
[X86] Add vector support to targetShrinkDemandedConstant for OR/XOR opcodes

If a constant is only allsignbits in the demanded/active bits, then sign extend it to an allsignbits bool pattern for OR/XOR ops.

This also requires SimplifyDemandedBits XOR handling to be modified to call ShrinkDemandedConstant on any (non-NOT) XOR pattern to account for non-splat cases.

Next step towards fixing PR45808 - with this patch we now get a <-1,-1,0,0> v4i64 constant instead of <1,1,0,0>.

Differential Revision: https://reviews.llvm.org/D82257

16 months ago[openmp][NFC] Cleanup: guard __kmp_mic_type by KMP_MIC_SUPPORTED macro.
AndreyChurbanov [Mon, 29 Jun 2020 11:14:56 +0000 (14:14 +0300)]
[openmp][NFC] Cleanup: guard __kmp_mic_type by KMP_MIC_SUPPORTED macro.

Differential Revision: https://reviews.llvm.org/D82301

16 months ago[AArch64][SVE] Add bfloat16 support to svext intrinsic
Cullen Rhodes [Fri, 19 Jun 2020 10:00:41 +0000 (10:00 +0000)]
[AArch64][SVE] Add bfloat16 support to svext intrinsic

Reviewers: sdesmalen, kmclaughlin, efriedma, david-arm, fpetrogalli

Reviewed By: sdesmalen, fpetrogalli

Differential Revision: https://reviews.llvm.org/D82391

16 months ago[AArch64][SVE] Bail out of performPostLD1Combine for scalable types
Kerry McLaughlin [Mon, 29 Jun 2020 09:51:41 +0000 (10:51 +0100)]
[AArch64][SVE] Bail out of performPostLD1Combine for scalable types

performPostLD1Combine will introduce either a LD1LANEpost
or LD1DUPpost node, which will cause selection failure if the
return type is a scalable vector.

Reviewers: sdesmalen, c-rhodes, efriedma

Reviewed By: efriedma

Subscribers: tschuett, kristof.beyls, hiraditya, rkruppe, psnobl, danielkiss, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82670

16 months ago[gn build] Port 8e5a56865f2
LLVM GN Syncbot [Mon, 29 Jun 2020 10:55:06 +0000 (10:55 +0000)]
[gn build] Port 8e5a56865f2

16 months agoMove TestClangConfig into libClangTesting and use it in AST Matchers tests
Dmitri Gribenko [Mon, 29 Jun 2020 10:47:51 +0000 (12:47 +0200)]
Move TestClangConfig into libClangTesting and use it in AST Matchers tests

Previously, AST Matchers tests were using a custom way to run a test
with a specific C++ standard version. I'm migrating them to a shared
infrastructure to specify a Clang target from libClangTesting. I'm also
changing tests for AST Matchers to run in multiple language standards
versions, and under multiple triples that have different behavior with
regards to templates.

To keep the size of the patch manageable, in this patch I'm only
migrating one file to get the process started and get feedback on this

One caveat is that increasing the number of test configuration does
significantly increase the runtime of AST Matchers tests. On my machine,
the test runtime increases from 2.0 to 6.0s. I think it is worth the
improved test coverage.

Reviewers: jdoerfert, ymandel

Reviewed By: ymandel

Subscribers: gribozavr2, jfb, sstefan1, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82179

16 months ago[TargetLowering] Add DemandedElts arg to ShrinkDemandedConstant
Simon Pilgrim [Mon, 29 Jun 2020 10:24:26 +0000 (11:24 +0100)]
[TargetLowering] Add DemandedElts arg to ShrinkDemandedConstant

Pre-commit for D82257, this adds a DemandedElts arg to ShrinkDemandedConstant/targetShrinkDemandedConstant which will allow future patches to (optionally) add vector support.

16 months ago[OpenMP][Tool] Fix buffer overflow in ompt-multiplex.h
Joachim Protze [Mon, 29 Jun 2020 10:43:41 +0000 (12:43 +0200)]
[OpenMP][Tool] Fix buffer overflow in ompt-multiplex.h

Reviewed by: runlieb

Differential Revision: https://reviews.llvm.org/D82452

16 months agoAdd tests for sequences of callbacks that RecursiveASTVisitor produces
Dmitri Gribenko [Mon, 29 Jun 2020 10:21:14 +0000 (12:21 +0200)]
Add tests for sequences of callbacks that RecursiveASTVisitor produces

These tests show a bug: post-order traversal introduces an extra call to
WalkUp*, that is not present in pre-order traversal. I'm fixing this bug
in a follow-up commit.

Reviewers: ymandel, eduucaldas

Reviewed By: ymandel, eduucaldas

Subscribers: gribozavr2, mgorny, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82485

16 months ago[mlir] make the bitwidth of device side index computations configurable (reland)
Tobias Gysi [Mon, 29 Jun 2020 09:32:46 +0000 (11:32 +0200)]
[mlir] make the bitwidth of device side index computations configurable (reland)

The patch makes the index type lowering of the GPU to NVVM/ROCDL conversion configurable. It introduces a pass option that controls the bitwidth used when lowering index computations and uses the LowerToLLVMOptions structure to control the Standard to LLVM lowering.

This commit fixes a use-after-free bug introduced by the reverted commit d10b1a3. It implements the following changes:
- Added a getDefaultOptions method to the LowerToLLVMOptions struct that returns a reference to statically allocated default options.
- Use the getDefaultOptions method to provide default LowerToLLVMOptions (instead of an initializer list).
- Added comments to clarify the required lifetime of the LowerToLLVMOptions

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D82475

16 months ago[mlir] LLVM dialect: use addressof instead of constant to create function pointers
Alex Zinenko [Mon, 29 Jun 2020 10:16:23 +0000 (12:16 +0200)]
[mlir] LLVM dialect: use addressof instead of constant to create function pointers

`llvm.mlir.constant` was originally introduced as an LLVM dialect counterpart
to `std.constant`. As such, it was supporting "function pointer" constants
derived from the symbol name. This is different from `std.constant` that allows
for creation of a "function" constant since MLIR, unlike LLVM IR, supports
this. Later, `llvm.mlir.addressof` was introduced as an Op that obtains a
constant pointer to a global in the LLVM dialect. It naturally extends to
functions (in LLVM IR, functions are globals) and should be used for defining
"function pointer" values instead.

Fixes PR46344.

Differential Revision: https://reviews.llvm.org/D82667

16 months ago[llvm-objcopy] Emit error if removing symtab referenced by group section
Georgy Komarov [Mon, 29 Jun 2020 09:25:26 +0000 (10:25 +0100)]
[llvm-objcopy] Emit error if removing symtab referenced by group section

SHT_GROUP sections contain a reference to a symbol indicating their
"signature" symbol. The symbol table containing this symbol is referred
to by the group section's sh_link field. If llvm-objcopy is instructed
to remove the symbol table, it will emit an error.

This fixes https://bugs.llvm.org/show_bug.cgi?id=46153.

Reviewed By: jhenderson, Higuoxing

Differential Revision: https://reviews.llvm.org/D82274

16 months agoFix invalid alignment in DAGCombiner::isLegalNarrowLdSt
Guillaume Chatelet [Mon, 29 Jun 2020 09:22:15 +0000 (09:22 +0000)]
Fix invalid alignment in DAGCombiner::isLegalNarrowLdSt

`ShAmt / 8` can be a non power of two, this can lead to an invalid alignment.
context: https://reviews.llvm.org/D41350#inline-749165

Differential Revision: https://reviews.llvm.org/D82565

16 months agoRevert "[clang-tidy] relanding b9306fd"
Nathan James [Mon, 29 Jun 2020 08:44:11 +0000 (09:44 +0100)]
Revert "[clang-tidy] relanding b9306fd"

This reverts commit 37cc4fa2eaa3d03ca8cd4947eb0d4c60e3c9b45c. More investigation needed

16 months ago[MLIR][Shape] Lower `shape.get_extent` to `extract_element` when possible
Frederik Gossen [Mon, 29 Jun 2020 08:14:15 +0000 (08:14 +0000)]
[MLIR][Shape] Lower `shape.get_extent` to `extract_element` when possible

When the origin of a shape is an extent tensor the operation `get_extent` can be
lowered directly to `extract_element`.
This choice circumvents the necessity to materialize the shape in memory.

Differential Revision: https://reviews.llvm.org/D82645

16 months ago[MLIR][Shape] Lower `shape.get_extent` to `std.dim` when possible
Frederik Gossen [Mon, 29 Jun 2020 08:17:00 +0000 (08:17 +0000)]
[MLIR][Shape] Lower `shape.get_extent` to `std.dim` when possible

When the shape is derived from a tensor argument the shape extent can be derived
directly from that tensor with `std.dim`.
This lowering pattern circumvents the necessity to materialize the shape in

Differential Revision: https://reviews.llvm.org/D82644

16 months ago[clang-tidy] relanding b9306fd
Nathan James [Mon, 29 Jun 2020 08:29:26 +0000 (09:29 +0100)]
[clang-tidy] relanding b9306fd

Added some sanity checks to figure out the cause of a (seemingly unrelated) test failure on mac.
These can be removed should no issues arise on that platform again.

16 months ago[gn build] Port 8f9ca561a2b
LLVM GN Syncbot [Mon, 29 Jun 2020 08:10:01 +0000 (08:10 +0000)]
[gn build] Port 8f9ca561a2b

16 months ago[ObjectYAML][DWARF] Collect diagnostic message when YAMLParser fails.
Xing GUO [Mon, 29 Jun 2020 07:35:12 +0000 (15:35 +0800)]
[ObjectYAML][DWARF] Collect diagnostic message when YAMLParser fails.

Before this patch, the diagnostic message is printed to `errs()` directly, which makes it difficult to use `FailedWithMessage()` in unit testing.
In this patch, we add a custom error handler for YAMLParser, which helps collect diagnostic messages and make it easy to use `FailedWithMessage()` to check error messages.

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D82630

16 months ago[mlir] do not hardcode the name of the undefined function in the error message
Alex Zinenko [Mon, 29 Jun 2020 07:56:40 +0000 (09:56 +0200)]
[mlir] do not hardcode the name of the undefined function in the error message

The error message in the `std.constant` verifier for function-typed constants
had the name of the undefined function hardcoded to `bar`. Report the actual
name instead.

Differential Revision: https://reviews.llvm.org/D82666

16 months ago[mlir] Modernize LLVM dialect rountrip test
Alex Zinenko [Fri, 26 Jun 2020 13:27:46 +0000 (15:27 +0200)]
[mlir] Modernize LLVM dialect rountrip test

This test largely predates MLIR testing guidelines. Update it to match the
guidelines. In particular, avoid pattern-matching SSA value names, avoid
unnecessary CHECK-NEXT, relax assumptions about the form of SSA names.
Value-returning operations are still matched agaist _any_ name in order to
check that the operation indeed produces values.

Differential Revision: https://reviews.llvm.org/D82656

16 months ago[clangd][Hover] Dont crash on null types
Kadir Cetinkaya [Sat, 27 Jun 2020 09:12:51 +0000 (11:12 +0200)]
[clangd][Hover] Dont crash on null types

Reviewers: hokein, sammccall

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

Tags: #clang

Differential Revision: https://reviews.llvm.org/D82701

16 months agoRevert "[clang-tidy] Reworked enum options handling(again)"
Nico Weber [Mon, 29 Jun 2020 01:49:07 +0000 (21:49 -0400)]
Revert "[clang-tidy] Reworked enum options handling(again)"

This reverts commit b9306fd042ce1c11d84f05d2124dfdc65b8331fe
and follow-up 42a51587c79a673045aec3586f4070630e5e7af3.

It seems to build check-clang-tools on macOS, see comments on

16 months ago[Clang][OpenMP][OMPBuilder] Moving OMP allocation and cache creation code to OMPBuild...
Fady Ghanim [Thu, 4 Jun 2020 19:55:17 +0000 (15:55 -0400)]
[Clang][OpenMP][OMPBuilder] Moving OMP allocation and cache creation code to OMPBuilderCBHelpers

Modified the OMPBuilderCBHelpers in the following ways:
- Moved location of class definition and deleted all constructors
- Moved OpenMP-specific address allocation of local variables
- Moved threadprivate variable creation for the current thread

Reviewers: jdoerfert

Subscribers: yaxunl, guansong, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D79676

16 months ago[NFC] CallGraph related cleanup
Sergey Dmitriev [Sun, 28 Jun 2020 22:24:33 +0000 (15:24 -0700)]
[NFC] CallGraph related cleanup

Summary: Tidy up some CallGraph-related code in preparation for D82572.

Reviewers: jdoerfert

Reviewed By: jdoerfert

Subscribers: hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D82686

16 months ago[SimplifyCFG] Make test more robust (NFC)
Nikita Popov [Sun, 28 Jun 2020 16:35:13 +0000 (18:35 +0200)]
[SimplifyCFG] Make test more robust (NFC)

Avoid changing this test if blocks get merged.

16 months ago[SimplifyCFG] Regenerate test checks (NFC)
Nikita Popov [Sun, 28 Jun 2020 18:50:02 +0000 (20:50 +0200)]
[SimplifyCFG] Regenerate test checks (NFC)

16 months ago[X86] Explicitly add popcnt feature to Intel CPUs with SSE4.2 in the frontend.
Craig Topper [Sun, 28 Jun 2020 18:06:40 +0000 (11:06 -0700)]
[X86] Explicitly add popcnt feature to Intel CPUs with SSE4.2 in the frontend.

Previously we inferred it if sse4.2 ended up being enabled after
all feature processing. But writing -march=nehalem -mno-sse4.2
should have popcnt enabled.

16 months ago[libc] This commit fixes the strcmp fuzzing test. It uses a single input and
cgyurgyik [Sun, 28 Jun 2020 17:33:56 +0000 (12:33 -0500)]
[libc] This commit fixes the strcmp fuzzing test. It uses a single input and
splits it into two by using the value of the first byte to determine the
length of the first string. Reviewed-by: PaulkaToast, Differential
Revision: https://reviews.llvm.org/D82427

[libc] Since only one input is given, it is necessary to split the string into two containers so that they can be compared for the purposes of this fuzz test. This is done in the following manner:

1. Take the value of the first byte; this is size1. (Credits to @PaulkaToast for this idea).
2. size2 is the value of size - size1.
3. Copy the characters to new containers, data1 and data2 with corresponding sizes.
4. Add a null terminator to the first container, and verify the second container has a null terminator.
5. Verify output of strcmp.

A simpler alternative considered was simply splitting the input data into two, but this means the two strings are always within +- 1 character of each other. This above implementation avoids this.

ninja check-libc was run; no issues.

Reviewers: PaulkaToast, sivachandra

Reviewed By: PaulkaToast

Subscribers: mgorny, tschuett, ecnelises, libc-commits, PaulkaToast

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D82427

16 months ago[NFC][ScalarEvolution] Add a test showing SCEV failure to recognize 'urem'
Roman Lebedev [Sun, 28 Jun 2020 17:31:14 +0000 (20:31 +0300)]
[NFC][ScalarEvolution] Add a test showing SCEV failure to recognize 'urem'

While InstCombine trivially converts that `srem` into a `urem`,
it might happen later than wanted. SCEV should recognize this natively.

16 months ago[Coroutines] Optimize the lifespan of temporary co_await object
Xun Li [Sun, 21 Jun 2020 03:29:10 +0000 (20:29 -0700)]
[Coroutines] Optimize the lifespan of temporary co_await object

If we ever assign co_await to a temporary variable, such as foo(co_await expr),
we generate AST that looks like this: MaterializedTemporaryExpr(CoawaitExpr(...)).
MaterializedTemporaryExpr would emit an intrinsics that marks the lifetime start of the
temporary storage. However such temporary storage will not be used until co_await is ready
to write the result. Marking the lifetime start way too early causes extra storage to be
put in the coroutine frame instead of the stack.
As you can see from https://godbolt.org/z/zVx_eB, the frame generated for get_big_object2 is 12K, which contains a big_object object unnecessarily.
After this patch, the frame size for get_big_object2 is now only 8K. There are still room for improvements, in particular, GCC has a 4K frame for this function. But that's a separate problem and not addressed in this patch.

The basic idea of this patch is during CoroSplit, look for every local variable in the coroutine created through AllocaInst, identify all the lifetime start/end markers and the use of the variables, and sink the lifetime.start maker to the places as close to the first-ever use as possible.

Reviewers: lewissbaker, modocache, junparser

Reviewed By: junparser

Subscribers: hiraditya, llvm-commits, rsmith, ChuanqiXu, cfe-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D82314

16 months ago[VectorCombine] add test for scalable vectors; NFC
Sanjay Patel [Sun, 28 Jun 2020 16:44:44 +0000 (12:44 -0400)]
[VectorCombine] add test for scalable vectors; NFC

16 months agoRevert "[VectorCombine] add test for scalable vectors; NFC"
Sanjay Patel [Sun, 28 Jun 2020 16:43:11 +0000 (12:43 -0400)]
Revert "[VectorCombine] add test for scalable vectors; NFC"

This reverts commit 700ec6b848c02ca3de9751d63a7a5a26671c3fe9.
An extra test diff snuck here.

16 months ago[VectorCombine] add test for scalable vectors; NFC
Sanjay Patel [Sun, 28 Jun 2020 16:41:37 +0000 (12:41 -0400)]
[VectorCombine] add test for scalable vectors; NFC

16 months ago[x86] add tests for rsqrt opportunities; NFC
Sanjay Patel [Fri, 26 Jun 2020 21:14:43 +0000 (17:14 -0400)]
[x86] add tests for rsqrt opportunities; NFC

16 months ago[NFC][PowerPC] Add run lines to test DivRemPairsPass.
Esme-Yi [Sun, 28 Jun 2020 16:26:05 +0000 (16:26 +0000)]
[NFC][PowerPC] Add run lines to test DivRemPairsPass.