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5 years ago[SimpleLoopUnswitch] Fix DT updates for trivial branch unswitching.
Alina Sbirlea [Sat, 28 Jul 2018 00:01:05 +0000 (00:01 +0000)]
[SimpleLoopUnswitch] Fix DT updates for trivial branch unswitching.

Summary:
Fixing 2 issues with the DT update in trivial branch switching, though I don't have a case where DT update fails.
1. After splitting ParentBB->UnswitchedBB edge, new edges become: ParentBB->LoopExitBB->UnswitchedBB, so remove ParentBB->LoopExitBB edge.
2. AFAIU, for multiple CFG changes, DT should be updated using batch updates, vs consecutive addEdge and removeEdge calls.

Reviewers: chandlerc, kuhar

Subscribers: sanjoy, jlebar, llvm-commits

Differential Revision: https://reviews.llvm.org/D49925

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338180 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert "[WebAssembly] Added default stack-only instruction mode for MC."
Wouter van Oortmerssen [Fri, 27 Jul 2018 23:19:51 +0000 (23:19 +0000)]
Revert "[WebAssembly] Added default stack-only instruction mode for MC."

This reverts commit d3c9af4179eae7793d1487d652e2d4e23844555f.
(SVN revision 338164)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338176 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Support] Remove unnecessary MemoryBuffer::anchor (where the destructor serves as...
Fangrui Song [Fri, 27 Jul 2018 23:12:11 +0000 (23:12 +0000)]
[Support] Remove unnecessary MemoryBuffer::anchor (where the destructor serves as the key function)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338175 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Add support expanding multiplies by constant where the constant is -3/-5/-9...
Craig Topper [Fri, 27 Jul 2018 23:04:59 +0000 (23:04 +0000)]
[X86] Add support expanding multiplies by constant where the constant is -3/-5/-9 multplied by a power of 2.

These can be replaced with an LEA, a shift, and a negate. This seems to match what gcc and icc would do.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338174 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-objcopy] Make --strip-debug strip .zdebug* (zlib-gnu) sections
Fangrui Song [Fri, 27 Jul 2018 22:51:36 +0000 (22:51 +0000)]
[llvm-objcopy] Make --strip-debug strip .zdebug* (zlib-gnu) sections

This behavior matches GNU objcopy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338173 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstrProf] Don't register __llvm_profile_runtime_user
Reid Kleckner [Fri, 27 Jul 2018 22:21:35 +0000 (22:21 +0000)]
[InstrProf] Don't register __llvm_profile_runtime_user

Refactor some FileCheck prefixes while I'm at it.

Fixes PR38340

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338172 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[WebAssembly] Added default stack-only instruction mode for MC.
Wouter van Oortmerssen [Fri, 27 Jul 2018 20:56:43 +0000 (20:56 +0000)]
[WebAssembly] Added default stack-only instruction mode for MC.

Summary:
Moved Explicit Locals pass to last.
Made that pass obligatory.
Made it convert from register to stack based instructions, and removed the registers.
Fixes to related code that was expecting register based instructions.
Added the correct testing flag to all tests, depending on what the
format they were expecting so far.
Translated one test to stack format as example: reg-stackify-stack.ll

tested:
llvm-lit -v `find test -name WebAssembly`
unittests/MC/*

Reviewers: dschuff, sunfish

Subscribers: sbc100, jgravelle-google, eraman, aheejin, llvm-commits

Differential Revision: https://reviews.llvm.org/D49160

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338164 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] [NFC] [Tests] Fold Select with AND/OR condition - fixed
David Bolvansky [Fri, 27 Jul 2018 20:29:32 +0000 (20:29 +0000)]
[InstCombine] [NFC] [Tests] Fold Select with AND/OR condition - fixed

Differential Revision: https://reviews.llvm.org/D49933

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338161 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRecommit "Enable MachineOutliner by default under -Oz for AArch64"
Jessica Paquette [Fri, 27 Jul 2018 20:18:27 +0000 (20:18 +0000)]
Recommit "Enable MachineOutliner by default under -Oz for AArch64"

Fixed the ASAN failure from before in r338148, so recommiting.

This patch enables the MachineOutliner by default in AArch64 under -Oz.

The MachineOutliner offers around a 4.5% improvement on the current -Oz code
size improvements.

We have done work into improving the debuggability of outlined code, so that
users of -Oz won't be surprised by the optimization. We have also been executing
the LLVM test suite and common external tests such as the SPEC suites
continuously with no issue. The outliner has a low compile-time overhead of
roughly 1%. At this point, the outliner would be a really good addition to the
-Oz pass pipeline!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338160 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] [NFC] [Tests] Fold Select with AND/OR condition
David Bolvansky [Fri, 27 Jul 2018 20:18:12 +0000 (20:18 +0000)]
[InstCombine] [NFC] [Tests] Fold Select with AND/OR condition

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D49932

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338159 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SLC] Test simplification of pow(x, 0.333...) to cbrt(x) (NFC)
Evandro Menezes [Fri, 27 Jul 2018 18:56:47 +0000 (18:56 +0000)]
[SLC] Test simplification of pow(x, 0.333...) to cbrt(x) (NFC)

Add test case for simplifying `pow(x, 0.333...)` into `cbrt(x)`, which
D49040 enables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338152 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64, PowerPC, x86] add more signbit math tests; NFC
Sanjay Patel [Fri, 27 Jul 2018 18:31:21 +0000 (18:31 +0000)]
[AArch64, PowerPC, x86] add more signbit math tests; NFC

The tests with a constant sub operand were added with rL338143,
but the potential transform doesn't have that requirement, so
adding more tests with variable operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338150 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MachineOutliner] Exit getOutliningCandidateInfo when we erase all candidates
Jessica Paquette [Fri, 27 Jul 2018 18:21:57 +0000 (18:21 +0000)]
[MachineOutliner] Exit getOutliningCandidateInfo when we erase all candidates

There was a missing check for if a candidate list was entirely deleted. This
adds that check.

This fixes an asan failure caused by running test/CodeGen/AArch64/addsub_ext.ll
with the MachineOutliner enabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338148 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[ARM] Add new target feature to fuse literal generation
Evandro Menezes [Fri, 27 Jul 2018 18:16:47 +0000 (18:16 +0000)]
[ARM] Add new target feature to fuse literal generation

This feature enables the fusion of such operations on Cortex A57 and Cortex
A72, as recommended in their Software Optimisation Guides, sections 4.14 and
4.11, respectively.

Differential revision: https://reviews.llvm.org/D49563

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338147 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64, PowerPC, x86] add more signbit math tests; NFC
Sanjay Patel [Fri, 27 Jul 2018 18:12:29 +0000 (18:12 +0000)]
[AArch64, PowerPC, x86] add more signbit math tests; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338143 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[demangler] Support for reference collapsing
Erik Pilkington [Fri, 27 Jul 2018 17:27:40 +0000 (17:27 +0000)]
[demangler] Support for reference collapsing

llvm.org/PR38323

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338138 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert "Enable MachineOutliner by default under -Oz for AArch64"
Jessica Paquette [Fri, 27 Jul 2018 17:25:38 +0000 (17:25 +0000)]
Revert "Enable MachineOutliner by default under -Oz for AArch64"

It failed an Asan test on a bot:

http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/21543/steps/check-llvm%20asan/logs/stdio

Fixing that before recommitting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338136 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agobpf: add missing RegState to notify MachineInstr verifier necessary register usage
Yonghong Song [Fri, 27 Jul 2018 16:58:52 +0000 (16:58 +0000)]
bpf: add missing RegState to notify MachineInstr verifier necessary register usage

Errors like the following are reported by:

  https://urldefense.proofpoint.com/v2/url?u=http-3A__lab.llvm.org-3A8011_builders_llvm-2Dclang-2Dx86-5F64-2Dexpensive-2Dchecks-2Dwin_builds_11261&d=DwIBAg&c=5VD0RTtNlTh3ycd41b3MUw&r=DA8e1B5r073vIqRrFz7MRA&m=929oWPCf7Bf2qQnir4GBtowB8ZAlIRWsAdTfRkDaK-g&s=9k-wbEUVpUm474hhzsmAO29VXVvbxJPWD9RTgCD71fQ&e=

  *** Bad machine code: Explicit definition marked as use ***
  - function:    cal_align1
  - basic block: %bb.0 entry (0x47edd98)
  - instruction: LDB $r3, $r2, 0
  - operand 0:   $r3

This is because RegState info was missing for ScratchReg inside
expandMEMCPY. This caused incomplete register usage information to
MachineInstr verifier which then would complain as there could be potential
code-gen issue if the complained MachineInstr is used in place where
register usage information matters even though the memcpy expanding is not
in such case as it happens at the last stage of IR optimization pipeline.

We should always specify those register usage information which compiler
couldn't deduct automatically whenever we add a hardware register manually.

Reported-by: Builder llvm-clang-x86_64-expensive-checks-win Build #11261
Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338134 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoEnable MachineOutliner by default under -Oz for AArch64
Jessica Paquette [Fri, 27 Jul 2018 16:44:42 +0000 (16:44 +0000)]
Enable MachineOutliner by default under -Oz for AArch64

This patch enables the MachineOutliner by default in AArch64 under -Oz.

The MachineOutliner offers around a 4.5% improvement on the current -Oz code
size improvements.

We have done work into improving the debuggability of outlined code, so that
users of -Oz won't be surprised by the optimization. We have also been executing
the LLVM test suite and common external tests such as the SPEC suites
continuously with no issue. The outliner has a low compile-time overhead of
roughly 1%. At this point, the outliner would be a really good addition to the
-Oz pass pipeline!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338133 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DAGCombiner] fold 'not' with signbit math
Sanjay Patel [Fri, 27 Jul 2018 16:42:55 +0000 (16:42 +0000)]
[DAGCombiner] fold 'not' with signbit math

This is a follow-up suggested in D48970.

Alive proofs:
https://rise4fun.com/Alive/sII

We can eliminate an instruction in the usual select-of-constants
to bit hack transform by adjusting the add/sub with constant.
This is always a win.

There are more transforms that are likely wins, but they may need
target hooks in case some targets do not benefit.

This is another step towards making up for canonicalizing to
select-of-constants in rL331486.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338132 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[x86] add more tests for signbit math; NFC
Sanjay Patel [Fri, 27 Jul 2018 16:22:40 +0000 (16:22 +0000)]
[x86] add more tests for signbit math; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338131 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[PowerPC] add more tests for signbit math; NFC
Sanjay Patel [Fri, 27 Jul 2018 16:22:18 +0000 (16:22 +0000)]
[PowerPC] add more tests for signbit math; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338130 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64] add more tests for signbit math; NFC
Sanjay Patel [Fri, 27 Jul 2018 16:21:56 +0000 (16:21 +0000)]
[AArch64] add more tests for signbit math; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338129 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Support] Use unsigned char for xxHash 64-bit
Fangrui Song [Fri, 27 Jul 2018 16:01:09 +0000 (16:01 +0000)]
[Support] Use unsigned char for xxHash 64-bit

Before, the last 3 bytes were char-signedness dependent.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338128 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU/R600: Add MOV instructions to BFE patterns
Jan Vesely [Fri, 27 Jul 2018 15:00:13 +0000 (15:00 +0000)]
AMDGPU/R600: Add MOV instructions to BFE patterns

R600 can't handle immediates for BFE, these will be eliminated later.
Fixes powr/pow regressions n r600 since r334817

Differential Revision: https://reviews.llvm.org/D49641

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338127 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][SVE] Asm: Predicated integer reductions.
Sander de Smalen [Fri, 27 Jul 2018 14:24:55 +0000 (14:24 +0000)]
[AArch64][SVE] Asm: Predicated integer reductions.

This patch adds support for various integer reduction operations:

  SADDV    signed add reduction to scalar
  UADDV    unsigned add reduction to scalar

  SMAXV    signed maximum reduction to scalar
  SMINV    signed minimum reduction to scalar
  UMAXV    unsigned maximum reduction to scalar
  UMINV    unsigned minimum reduction to scalar

  ANDV     logical AND reduction to scalar
  ORV      logical OR reduction to scalar
  EORV     logical EOR reduction to scalar

The reduction is predicated, e.g.
  smaxv s0, p0, z1.s

performs a signed maximum reduction on active elements in z1,
and stores the (signed max value) result in s0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338126 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU][MC][DOC] Updated AMD GPU assembler description
Dmitry Preobrazhensky [Fri, 27 Jul 2018 14:17:15 +0000 (14:17 +0000)]
[AMDGPU][MC][DOC] Updated AMD GPU assembler description

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338125 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][SVE] Asm: Predicated floating point reductions.
Sander de Smalen [Fri, 27 Jul 2018 13:58:48 +0000 (13:58 +0000)]
[AArch64][SVE] Asm: Predicated floating point reductions.

This patch adds support for various floating-point
reduction operations:

  FADDA    strictly-ordered add reduction, accumulating in scalar
  FADDV    recursive add reduction to scalar
  FMAXV    recursive max reduction to scalar
  FMINV    recursive min reduction to scalar
  FMAXNMV  recursive max number reduction to scalar
  FMINNMV  recursive min number reduction to scalar

The reduction is predicated, e.g.

  fadda d0, p0, d0, z1.d

performs the add-reduction in strict order on active elements
in z1, accumulating into d0.

  faddv d0, p0, z1.d

performs the add-reduction (not in strict order)
on active elements in z1, storing the result in d0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338123 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][SVE] Asm: Support for FEXPA and FTSSEL.
Sander de Smalen [Fri, 27 Jul 2018 12:40:09 +0000 (12:40 +0000)]
[AArch64][SVE] Asm: Support for FEXPA and FTSSEL.

This patch adds support for transcendental acceleration
instructions 'FEXPA' (exponential accelerator) and 'FTSSEL'
(trigonometric select coefficient).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338121 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][SVE] Asm: Support for FRECPE and FRSQRTE.
Sander de Smalen [Fri, 27 Jul 2018 12:26:24 +0000 (12:26 +0000)]
[AArch64][SVE] Asm: Support for FRECPE and FRSQRTE.

Support for floating-point instructions for reciprocal
estimate (FRECPE) and reciprocal square root estimate (FRSQRTE).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338120 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[CMake] Followup for r337366: Only export LLVM_LINK_LLVM_DYLIB if it's set to ON
Philip Pfaffe [Fri, 27 Jul 2018 10:57:51 +0000 (10:57 +0000)]
[CMake] Followup for r337366: Only export LLVM_LINK_LLVM_DYLIB if it's set to ON

Summary:
As it was, always exporting LLVM_LINK_LLVM_DYLIB caused out-of-tree
clients to lose the ability to link against the dylib, even if in-tree tools did
not. By only exporting the setting if it is enabled, out-of-tree clients get the
correct default, but may still choose if they can.

Reviewers: mgorny, beanz, labath, bogner, chandlerc

Reviewed By: bogner, chandlerc

Subscribers: bollu, llvm-commits

Differential Revision: https://reviews.llvm.org/D49843

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338119 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] not(sub X, Y) --> add (not X), Y
Sanjay Patel [Fri, 27 Jul 2018 10:54:48 +0000 (10:54 +0000)]
[InstCombine] not(sub X, Y) --> add (not X), Y

The tests with constants show a missing optimization.
Analysis for adds is better than subs, so this can also
help with other transforms. And codegen is better with
adds for targets like x86 (destructive ops, no sub-from).

https://rise4fun.com/Alive/llK

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338118 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] add tests for not+sub; NFC
Sanjay Patel [Fri, 27 Jul 2018 10:45:04 +0000 (10:45 +0000)]
[InstCombine] add tests for not+sub; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338117 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SimplifyIndVar] Canonicalize comparisons to unsigned while eliminating truncs
Max Kazantsev [Fri, 27 Jul 2018 09:43:39 +0000 (09:43 +0000)]
[SimplifyIndVar] Canonicalize comparisons to unsigned while eliminating truncs

This is a follow-up for the patch rL335020. When we replace compares against
trunc with compares against wide IV, we can also replace signed predicates with
unsigned where it is legal.

Reviewed By: reames
Differential Revision: https://reviews.llvm.org/D48763

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338115 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Support] Bring std::errc::not_supported to llvm::errc.
Victor Leschuk [Fri, 27 Jul 2018 09:15:05 +0000 (09:15 +0000)]
[Support] Bring std::errc::not_supported to llvm::errc.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338114 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU: Fix code size for return_to_epilog pseudo
Matt Arsenault [Fri, 27 Jul 2018 09:15:03 +0000 (09:15 +0000)]
AMDGPU: Fix code size for return_to_epilog pseudo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338113 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoDAG: Remove unnecessary .str()
Matt Arsenault [Fri, 27 Jul 2018 09:04:41 +0000 (09:04 +0000)]
DAG: Remove unnecessary .str()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338112 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoPatternMatch: Add wrappers for fabs and canonicalize
Matt Arsenault [Fri, 27 Jul 2018 09:04:35 +0000 (09:04 +0000)]
PatternMatch: Add wrappers for fabs and canonicalize

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338111 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert "[LV][DebugInfo] Set DL to the middle block Icmp instruction"
Anastasis Grammenos [Fri, 27 Jul 2018 08:22:54 +0000 (08:22 +0000)]
Revert "[LV][DebugInfo] Set DL to the middle block Icmp instruction"

This reverts commit r338106.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338109 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstSimplify] tests for D48828: fold extraction from std::pair
Hiroshi Inoue [Fri, 27 Jul 2018 07:21:02 +0000 (07:21 +0000)]
[InstSimplify] tests for D48828: fold extraction from std::pair

This commit includes unit tests for D48828, which enhances InstSimplify to enable jump threading with a method whose return type is std::pair<int, bool> or std::pair<bool, int>.
I am going to commit the actual transformation later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338107 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LV][DebugInfo] Set DL to the middle block Icmp instruction
Anastasis Grammenos [Fri, 27 Jul 2018 07:12:44 +0000 (07:12 +0000)]
[LV][DebugInfo] Set DL to the middle block Icmp instruction

Reviewers: hsaito

Differential Revision: https://reviews.llvm.org/D49746

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338106 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Docs] Remove hard tab character from code block in optbisect documentation
Craig Topper [Fri, 27 Jul 2018 06:54:13 +0000 (06:54 +0000)]
[Docs] Remove hard tab character from code block in optbisect documentation

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338105 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[NFC] Remove an empty line.
Xin Tong [Fri, 27 Jul 2018 06:50:45 +0000 (06:50 +0000)]
[NFC] Remove an empty line.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338104 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU/GlobalISel: Fix crash in regbankselect on non-power-of-2 types
Tom Stellard [Fri, 27 Jul 2018 06:04:40 +0000 (06:04 +0000)]
AMDGPU/GlobalISel: Fix crash in regbankselect on non-power-of-2 types

Reviewers: arsenm

Reviewed By: arsenm

Subscribers: kzhuravl, wdng, nhaehnle, yaxunl, rovka, kristof.beyls, dstuttard, tpr, llvm-commits, t-tye

Differential Revision: https://reviews.llvm.org/D49624

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338102 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Remove an unnecessary 'if' that prevented treating INT64_MAX and -INT64_MAX...
Craig Topper [Fri, 27 Jul 2018 05:56:27 +0000 (05:56 +0000)]
[X86] Remove an unnecessary 'if' that prevented treating INT64_MAX and -INT64_MAX as power of 2 minus 1 in the multiply expansion code.

Not sure why they were being explicitly excluded, but I believe all the math inside the if works. I changed the absolute value to be uint64_t instead of int64_t so INT64_MIN+1 wouldn't be signed wrap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338101 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LTO] Don't internalize declarations
Bob Haarman [Fri, 27 Jul 2018 05:40:29 +0000 (05:40 +0000)]
[LTO] Don't internalize declarations

Summary:
Some links were failing with "Global is external, but doesn't have
external or weak linkage!" in ThinLTO builds with debug
information. This happened when we elide the body of a global that is
referenced by debug info. This results in a declaration, which we
would then internalize - but declarations cannot be internal. This
change avoids the problem by not internalizing these declarations.

Fixes PR38046.

Reviewers: pcc, tejohnson

Subscribers: mehdi_amini, aprantl, hiraditya, JDevlieghere, steven_wu, dexonsmith, llvm-commits

Differential Revision: https://reviews.llvm.org/D49777

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338100 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoReplace LLVM_ALIGNAS with alignas as a follow-up of r337330
Fangrui Song [Fri, 27 Jul 2018 05:38:14 +0000 (05:38 +0000)]
Replace LLVM_ALIGNAS with alignas as a follow-up of r337330

The minimum required GCC version was raised to 4.8 (which started to support alignas) in r284497.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338099 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Add matching for another pattern of PMADDWD.
Craig Topper [Fri, 27 Jul 2018 04:29:10 +0000 (04:29 +0000)]
[X86] Add matching for another pattern of PMADDWD.

Summary:
This is the pattern you get from the loop vectorizer for something like this

int16_t A[1024];
int16_t B[1024];
int32_t C[512];

void pmaddwd() {
  for (int i = 0; i != 512; ++i)
    C[i] = (A[2*i]*B[2*i]) + (A[2*i+1]*B[2*i+1]);
}

In this case we will have (add (mul (build_vector), (build_vector)), (mul (build_vector), (build_vector))). This is different than the pattern we currently match which has the build_vectors between an add and a single multiply. I'm not sure what C code would get you that pattern.

Reviewers: RKSimon, spatel, zvi

Reviewed By: zvi

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D49636

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338097 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] canonicalize abs pattern
Chen Zheng [Fri, 27 Jul 2018 01:49:51 +0000 (01:49 +0000)]
[InstCombine] canonicalize abs pattern
Differential Revision: https://reviews.llvm.org/D48754

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338092 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] When removing sign extends from gather/scatter indices, make sure we handle...
Craig Topper [Fri, 27 Jul 2018 00:00:30 +0000 (00:00 +0000)]
[X86] When removing sign extends from gather/scatter indices, make sure we handle UpdateNodeOperands finding an existing node to CSE with.

If this happens the operands aren't updated and the existing node is returned. Make sure we pass this existing node up to the DAG combiner so that a proper replacement happens. Otherwise we get stuck in an infinite loop with an unoptimized node.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338090 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SelectionDAGBuilder] Add masked loads to PendingLoads rather than calling DAG.setRoot.
Craig Topper [Thu, 26 Jul 2018 23:22:11 +0000 (23:22 +0000)]
[SelectionDAGBuilder] Add masked loads to PendingLoads rather than calling DAG.setRoot.

Masked loads are calling DAG.getRoot rather than calling SelectionDAGBuilder::getRoot, which means the PendingLoads weren't emptied to update the root and create any needed TokenFactor. So it would be incorrect to call setRoot for the masked load.

This patch instead adds the masked load to PendingLoads so that the root doesn't get update until a store or scatter or something happens.. Alternatively, we could call SelectionDAGBuilder::getRoot before it, but that would create unnecessary serialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338085 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstrProf] Use comdats on COFF for available_externally functions
Reid Kleckner [Thu, 26 Jul 2018 22:59:17 +0000 (22:59 +0000)]
[InstrProf] Use comdats on COFF for available_externally functions

Summary:
r262157 added ELF-specific logic to put a comdat on the __profc_*
globals created for available_externally functions. We should be able to
generalize that logic to all object file formats that support comdats,
i.e. everything other than MachO. This fixes duplicate symbol errors,
since on COFF, linkonce_odr doesn't make the symbol weak.

Fixes PR38251.

Reviewers: davidxl, xur

Subscribers: hiraditya, dmajor, llvm-commits, aheejin

Differential Revision: https://reviews.llvm.org/D49882

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338082 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DWARF v5] Reposting r337981, which was reverted in r337997 due to a test failure...
Wolfgang Pieb [Thu, 26 Jul 2018 22:48:52 +0000 (22:48 +0000)]
[DWARF v5] Reposting r337981, which was reverted in r337997 due to a test failure in debuginfo_tests.
The test failure was caused by the compiler not emitting a __debug_ranges section with DWARF 4 and
earlier when no ranges are needed. The test checks for the existence regardless.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338081 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SelectionDAG] Add MLOAD/MSTORE/MGATHER/MSCATTER to AddNodeIDCustom to properly calcu...
Craig Topper [Thu, 26 Jul 2018 22:40:24 +0000 (22:40 +0000)]
[SelectionDAG] Add MLOAD/MSTORE/MGATHER/MSCATTER to AddNodeIDCustom to properly calculate their folding set ID to allow them to be CSEd.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338080 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DAGCombiner] Remove some calls to AddToWorklist that should be unnecessary.
Craig Topper [Thu, 26 Jul 2018 22:40:22 +0000 (22:40 +0000)]
[DAGCombiner] Remove some calls to AddToWorklist that should be unnecessary.

The DAGCombiner has a system for ensuring all nodes are visited. It doesn't require an AddToWorkList for every node that is created by a combine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338079 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoFix -Wsign-compare warning.
Zachary Turner [Thu, 26 Jul 2018 22:24:01 +0000 (22:24 +0000)]
Fix -Wsign-compare warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338078 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MS Demangler] Properly handle function parameter back-refs.
Zachary Turner [Thu, 26 Jul 2018 22:13:39 +0000 (22:13 +0000)]
[MS Demangler] Properly handle function parameter back-refs.

Properly demangle function parameter back-references.

Previously we treated lists of function parameters and template
parameters the same. There are some important differences with regards
to back-references, and some less important differences regarding which
characters can appear before or after the name.

The important differences are that with a given type T, all instances of
a function parameter list share the same global back-ref table.
Specifically, if X and Y are function pointers, then there are 3
entities in the declaration X func(Y) which all affect and are affected
by the master parameter back-ref table:
  1) The parameter list of X's function type
  2) the parameter list of func itself
  3) The parameter list of Y's function type.

The previous code would create a back-reference table that was local to
a single parameter list, so it would not be shared across parameter
lists.

This was discovered when porting ms-back-references.test from clang's
mangling tests. All of these tests should now pass with the new changes.

In doing so, I split the function for parsing template and function
parameters into two separate functions. This makes the template
parameter list parsing code in particular very small and easy to
understand now.

Differential Revision: https://reviews.llvm.org/D49875

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338075 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SCEV] Don't expand Wrap predicate using inttoptr in ni addrspaces
Keno Fischer [Thu, 26 Jul 2018 21:55:06 +0000 (21:55 +0000)]
[SCEV] Don't expand Wrap predicate using inttoptr in ni addrspaces

Summary:
In non-integral address spaces, we're not allowed to introduce inttoptr/ptrtoint
intrinsics. Instead, we need to expand any pointer arithmetic as geps on the
base pointer. Luckily this is a common task for SCEV, so all we have to do here
is hook up the corresponding helper function and add test case.

Fixes PR38290

Reviewers: sanjoy
Differential Revision: https://reviews.llvm.org/D49832

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338073 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SCEV] Add an expandAddToGEP overload for a single operand. NFC.
Keno Fischer [Thu, 26 Jul 2018 21:55:03 +0000 (21:55 +0000)]
[SCEV] Add an expandAddToGEP overload for a single operand. NFC.

Only wanting to pass a single SCEV operand to use as the offset of
the GEP is a common operation. Right now this requires creating a
temporary stack array at every call site. Add an overload
that encapsulates that pattern and simplify the call sites.

Suggested-By: sanjoy (in https://reviews.llvm.org/D49832)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338072 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoADT: Document advantages of SmallVector<T,0> over std::vector
Duncan P. N. Exon Smith [Thu, 26 Jul 2018 21:29:54 +0000 (21:29 +0000)]
ADT: Document advantages of SmallVector<T,0> over std::vector

In light of the recent changes to SmallVector in r335421, r337514, and
r337820, document its advantages over std::vector (see r175906 and
r266909).

Also add a release note.

https://reviews.llvm.org/D49748

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338071 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[RegisterCoalescer] Fixed inconsistent followCopyChain with subreg
Tim Renouf [Thu, 26 Jul 2018 21:27:34 +0000 (21:27 +0000)]
[RegisterCoalescer] Fixed inconsistent followCopyChain with subreg

Summary:
The behavior of followCopyChain with a subreg depends on the order in
which subranges appear in a live interval, which is bad.

This commit fixes that, and allows the copy chain to continue only if
all matching subranges that are not undefined take us to the same def.

I don't have a test for this; the reproducer I had on my branch with
various other local changes does not reproduce the problem on upstream
llvm. Also that reproducer was an ll test; attempting to convert it to a
mir test made the subranges appear in a different order and hid the
problem.

However I would argue that the old behavior was obviously wrong
and needs fixing.

Subscribers: MatzeB, qcolombet, llvm-commits

Differential Revision: https://reviews.llvm.org/D49535

Change-Id: Iee7936ef305918f3b498ac432e2cf651ae5cc2df

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338070 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DebugInfo] LowerDbgDeclare: Add derefs when handling CallInst users
Vedant Kumar [Thu, 26 Jul 2018 20:56:53 +0000 (20:56 +0000)]
[DebugInfo] LowerDbgDeclare: Add derefs when handling CallInst users

LowerDbgDeclare inserts a dbg.value before each use of an address
described by a dbg.declare. When inserting a dbg.value before a CallInst
use, however, it fails to append DW_OP_deref to the DIExpression.

The DW_OP_deref is needed to reflect the fact that a dbg.value describes
a source variable directly (as opposed to a dbg.declare, which relies on
pointer indirection).

This patch adds in the DW_OP_deref where needed. This results in the
correct values being shown during a debug session for a program compiled
with ASan and optimizations (see https://reviews.llvm.org/D49520). Note
that ConvertDebugDeclareToDebugValue is already correct -- no changes
there were needed.

One complication is that SelectionDAG is unable to distinguish between
direct and indirect frame-index (FRAMEIX) SDDbgValues. This patch also
fixes this long-standing issue in order to not regress integration tests
relying on the incorrect assumption that all frame-index SDDbgValues are
indirect. This is a necessary fix: the newly-added DW_OP_derefs cannot
be lowered properly otherwise. Basically the fix prevents a direct
SDDbgValue with DIExpression(DW_OP_deref) from being dereferenced twice
by a debugger. There were a handful of tests relying on this incorrect
"FRAMEIX => indirect" assumption which actually had incorrect
DW_AT_locations: these are all fixed up in this patch.

Testing:

- check-llvm, and an end-to-end test using lldb to debug an optimized
  program.
- Existing unit tests for DIExpression::appendToStack fully cover the
  new DIExpression::append utility.
- check-debuginfo (the debug info integration tests)

Differential Revision: https://reviews.llvm.org/D49454

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338069 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MS Demangler] Print calling convention inside parentheses.
Zachary Turner [Thu, 26 Jul 2018 20:33:48 +0000 (20:33 +0000)]
[MS Demangler] Print calling convention inside parentheses.

For function pointers, we would print something like

int __cdecl (*)(int)

We need to move the calling convention inside, and print

int (__cdecl *)(int)

This patch implements this change for regular function pointers as
well as member function pointers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338068 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MS Demangler] Add ms-arg-qualifiers.test
Zachary Turner [Thu, 26 Jul 2018 20:25:35 +0000 (20:25 +0000)]
[MS Demangler] Add ms-arg-qualifiers.test

This converts the arg qualifier mangling tests from
clang/CodeGenCXX/mangle-ms-arg-qualifiers.cpp to demangling tests.
Most tests already pass, so this patch doesn't come with any
functional change, just the addition of new tests.  The few tests
that don't pass are left in with a FIXME label so that they don't
run but serve as documentation about what still doesn't work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338067 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAdd missing tests from ms-mangle.cpp.
Zachary Turner [Thu, 26 Jul 2018 20:20:29 +0000 (20:20 +0000)]
Add missing tests from ms-mangle.cpp.

None of these tests pass yet so they are commented out, but I'm
adding them with a FIXME label so that they don't get lost when
copying tests over from clang's mangling tests.  Currently these
tests are all commented out.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338066 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MS Demangler] Demangle pointers to member functions.
Zachary Turner [Thu, 26 Jul 2018 20:20:10 +0000 (20:20 +0000)]
[MS Demangler] Demangle pointers to member functions.

After this patch, we can now properly demangle pointers to member
functions.  The calling convention is located in the wrong place,
but this will be fixed in a followup since it also affects non
member function pointers.

Differential Revision: https://reviews.llvm.org/D49639

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338065 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MC] Add support for the .rva assembler directive for COFF targets
Martin Storsjo [Thu, 26 Jul 2018 20:11:26 +0000 (20:11 +0000)]
[MC] Add support for the .rva assembler directive for COFF targets

Even though gas doesn't document it, it has been supported there for
a very long time.

This produces the 32 bit relative virtual address (aka image relative
address) for a given symbol. ".rva foo" is essentially equal to
".long foo@imgrel".

Differential Revision: https://reviews.llvm.org/D49821

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338063 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoHandle the lack of a symbol table correctly.
Stephen Hines [Thu, 26 Jul 2018 20:05:31 +0000 (20:05 +0000)]
Handle the lack of a symbol table correctly.

Summary:
These two cases will trigger a dereference on a nullptr, since the
SymbolTable can be nonexistent for a given library, in addition to just
being empty.

Reviewers: alexshap

Reviewed By: alexshap

Subscribers: meikeb, kongyi, chh, jakehehrlich, llvm-commits, pirama

Differential Revision: https://reviews.llvm.org/D49534

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338062 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MS Demangler] Demangle data member pointers.
Zachary Turner [Thu, 26 Jul 2018 19:56:09 +0000 (19:56 +0000)]
[MS Demangler] Demangle data member pointers.

Differential Revision: https://reviews.llvm.org/D49630

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338061 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU] Fix VGPR spills where offset doesn't fit in 12 bits
Scott Linder [Thu, 26 Jul 2018 19:47:51 +0000 (19:47 +0000)]
[AMDGPU] Fix VGPR spills where offset doesn't fit in 12 bits

Scale the offset of VGPR spills by the wave size when it cannot fit in the
12-bit offset immediate field and so is added to the soffset SGPR. This
accounts for hardware swizzling of scratch memory.

Differential Revision: https://reviews.llvm.org/D49448

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338060 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] fold udiv with common factor from muls with nuw
Sanjay Patel [Thu, 26 Jul 2018 19:22:41 +0000 (19:22 +0000)]
[InstCombine] fold udiv with common factor from muls with nuw

Unfortunately, sdiv isn't as simple because of UB due to overflow.

This fold is mentioned in PR38239:
https://bugs.llvm.org/show_bug.cgi?id=38239

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338059 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[RISCV] Add support for _interrupt attribute
Ana Pazos [Thu, 26 Jul 2018 17:49:43 +0000 (17:49 +0000)]
[RISCV] Add support for _interrupt attribute

- Save/restore only registers that are used.
This includes Callee saved registers and Caller saved registers
(arguments and temporaries) for integer and FP registers.
- If there is a call in the interrupt handler, save/restore all
Caller saved registers (arguments and temporaries) and all FP registers.
- Emit special return instructions depending on "interrupt"
attribute type.
Based on initial patch by Zhaoshi Zheng.

Reviewers: asb

Reviewed By: asb

Subscribers: rkruppe, the_o, MartinMosbeck, brucehoult, rbar, johnrusso, simoncook, sabuasal, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, mgrang, rogfer01, llvm-commits

Differential Revision: https://reviews.llvm.org/D48411

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338047 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoMacroFusion: Fix macro fusion with ExitSU failing in top-down scheduling
Matthias Braun [Thu, 26 Jul 2018 17:43:56 +0000 (17:43 +0000)]
MacroFusion: Fix macro fusion with ExitSU failing in top-down scheduling

When fusing instructions A and B, we must add all predecessors of B as
predecessors of A to avoid instructions getting scheduling in between.

There is a special case involving ExitSU: Every other node must be
scheduled before it by design and we don't need to make this explicit in
the graph, however when fusing with a different node we need to schedule
every othere node before the fused node too and we need to make this
explicit now: This patch adds a dependency from the fused node to all
roots in the graph.

Differential Revision: https://reviews.llvm.org/D49830

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338046 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DAGCombine] optimizeSetCCOfSignedTruncationCheck(): handle ule,ugt CondCodes.
Roman Lebedev [Thu, 26 Jul 2018 17:34:28 +0000 (17:34 +0000)]
[DAGCombine] optimizeSetCCOfSignedTruncationCheck(): handle ule,ugt CondCodes.

Summary:
A follow-up for D49266 / rL337166.

At least one of these cases is more canonical,
so we really do have to handle it.
https://godbolt.org/g/pkzP3X
https://rise4fun.com/Alive/pQyhZZ

We won't get to these cases with I1 being -1,
as that will be constant-folded to true or false.

I'm also not sure we actually hit the 'ule' case,
but i think the worst think that could happen is that being dead code.

Reviewers: spatel, craig.topper, RKSimon, javed.absar, efriedma

Reviewed By: spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D49497

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338044 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DEBUGINFO, NVPTX] Emit correct debug information for local variables.
Alexey Bataev [Thu, 26 Jul 2018 16:29:52 +0000 (16:29 +0000)]
[DEBUGINFO, NVPTX] Emit correct debug information for local variables.

Summary:
NVPTX target dos not use register-based frame information. Instead it
relies on the artificial local_depot that is used instead of the frame
and the data for variables must be emitted relatively to this
local_depot.

Reviewers: tra, jlebar, echristo

Subscribers: jholewinski, aprantl, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D45963

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338039 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] add tests for udiv with common factor; NFC
Sanjay Patel [Thu, 26 Jul 2018 16:14:53 +0000 (16:14 +0000)]
[InstCombine] add tests for udiv with common factor; NFC

This fold is mentioned in PR38239:
https://bugs.llvm.org/show_bug.cgi?id=38239

The general case probably belongs in -reassociate, but given that we do
basic reassociation optimizations similar to this in instcombine already,
we might as well be consistent within instcombine and handle this pattern?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338038 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DEBUGINFO, NVPTX] Set `DW_AT_frame_base` to `DW_OP_call_frame_cfa`.
Alexey Bataev [Thu, 26 Jul 2018 16:10:05 +0000 (16:10 +0000)]
[DEBUGINFO, NVPTX] Set `DW_AT_frame_base` to `DW_OP_call_frame_cfa`.

Summary:
For NVPTX target the value of `DW_AT_frame_base` attribute must be set
to `DW_OP_call_frame_cfa`.

Reviewers: tra, jlebar, echristo

Subscribers: jholewinski, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D45785

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338036 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert r338027 to pacify build bot
James Henderson [Thu, 26 Jul 2018 15:54:53 +0000 (15:54 +0000)]
Revert r338027 to pacify build bot

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338035 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[ADT] Replace std::isprint by llvm::isPrint.
Michael Kruse [Thu, 26 Jul 2018 15:31:41 +0000 (15:31 +0000)]
[ADT] Replace std::isprint by llvm::isPrint.

The standard library functions ::isprint/std::isprint have platform-
and locale-dependent behavior which makes LLVM's output less
predictable. In particular, regression tests my fail depending on the
implementation of these functions.

Implement llvm::isPrint in StringExtras.h with a standard behavior and
replace all uses of ::isprint/std::isprint by a call it llvm::isPrint.
The function is inlined and does not look up language settings so it
should perform better than the standard library's version.

Such a replacement has already been done for isdigit, isalpha, isxdigit
in r314883. gtest does the same in gtest-printers.cc using the following
justification:

    // Returns true if c is a printable ASCII character.  We test the
    // value of c directly instead of calling isprint(), which is buggy on
    // Windows Mobile.
    inline bool IsPrintableAscii(wchar_t c) {
      return 0x20 <= c && c <= 0x7E;
    }

Similar issues have also been encountered by Julia:
https://github.com/JuliaLang/julia/issues/7416

I noticed the problem myself when on Windows isprint('\t') started to
evaluate to true (see https://stackoverflow.com/questions/51435249) and
thus caused several unit tests to fail. The result of isprint doesn't
seem to be well-defined even for ASCII characters. Therefore I suggest
to replace isprint by a platform-independent version.

Differential Revision: https://reviews.llvm.org/D49680

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338034 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[UnJ] Common some code. NFC
David Green [Thu, 26 Jul 2018 15:19:07 +0000 (15:19 +0000)]
[UnJ] Common some code. NFC

Create a processHeaderPhiOperands for analysing the instructions
in the aft blocks that must be moved before the loop.

Differential Revision: https://reviews.llvm.org/D49061

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338033 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agodwarfgen: Add support for generating the debug_str_offsets section, take 3
Pavel Labath [Thu, 26 Jul 2018 14:36:07 +0000 (14:36 +0000)]
dwarfgen: Add support for generating the debug_str_offsets section, take 3

Previous version of this patch failed on darwin targets because of
different handling of cross-debug-section relocations. This fixes the
tests to emit the DW_AT_str_offsets_base attribute correctly in both
cases. Since doing this is a non-trivial amount of code, and I'm going
to need it in more than one test, I've added a helper function to the
dwarfgen DIE class to do it.

Original commit message follows:

The motivation for this is D49493, where we'd like to test details of
debug_str_offsets behavior which is difficult to trigger from a
traditional test.

This adds the plubming necessary for dwarfgen to generate this section.
The more interesting changes are:
- I've moved emitStringOffsetsTableHeader function from DwarfFile to
  DwarfStringPool, so I can generate the section header more easily from
  the unit test.
- added a new addAttribute overload taking an MCExpr*. This is used to
  generate the DW_AT_str_offsets_base, which links a compile unit to the
  offset table.

I've also added a basic test for reading and writing DW_form_strx forms.

Reviewers: dblaikie, JDevlieghere, probinson

Subscribers: llvm-commits, aprantl

Differential Revision: https://reviews.llvm.org/D49670

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338031 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[test] Disable dsymutil update test on windows
Jonas Devlieghere [Thu, 26 Jul 2018 14:16:19 +0000 (14:16 +0000)]
[test] Disable dsymutil update test on windows

Apparently, the issue with dsymutil update functionality on Windows was
that Windows doesn't like dsymutil renaming files that have open handles
to them. This disables the new accelerator test and updates the comment
in the other two test.

We should be able to enable the tests again once we updated the
implementation to use TempFile::keep() to keep the temporary files in
MachOUtils.

A big thank you to Jeremy Morse from Sony for figuring this out and
bringing it to my attention.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338030 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoEnable some pointer authentication instructions for aarch64 v8a targets
Luke Cheeseman [Thu, 26 Jul 2018 14:00:50 +0000 (14:00 +0000)]
Enable some pointer authentication instructions for aarch64 v8a targets

- Some of the v8.3 pointer authentication instruction inhabit the Hint space
- These instructions can be assembled to hint instructions which act as NOP instructions prior to v8.3
- This patch permits using the hint instructions for all v8a targets
- Also, correct the RETA{A,B} instructions to match the instruction attributes of RET (set isTerminator and isBarrier)

Differential Revision: https://reviews.llvm.org/D49786

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338029 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoFix raw_fd_ostream::write_impl hang with large output
James Henderson [Thu, 26 Jul 2018 13:22:07 +0000 (13:22 +0000)]
Fix raw_fd_ostream::write_impl hang with large output

On Windows when raw_fd_ostream::write_impl calls write, a 32 bit input
is required for character count. As a variable with size_t is used for
this argument on x64 integral demotion occurs. In the case of large
files an infinite loop follows.

See PR37926.

This fix allows the output of files larger than previous int32 limit.

Differential Revision: https://reviews.llvm.org/D48948

Patch by Owen Reynolds

Reviewed by: zturner

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338027 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agodwarfgen: Don't create an AsmPrinter with an invalid ObjFile lowering
Pavel Labath [Thu, 26 Jul 2018 13:16:06 +0000 (13:16 +0000)]
dwarfgen: Don't create an AsmPrinter with an invalid ObjFile lowering

The AsmPrinter created in the tests contained an uninitialized
TargetLoweringObjectFile. Things mostly worked regardless, because we
used a separate instance of that class to specify sections to emit.

This rearanges the object construction order so that we can avoid
creating two lowering objects. Instead, we properly initialize the
object in the AsmPrinter, and have the DWARF generator store a pointer
to it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338026 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[mips] Sign extend i32 return values on MIPS64
Stefan Maksimovic [Thu, 26 Jul 2018 10:59:35 +0000 (10:59 +0000)]
[mips] Sign extend i32 return values on MIPS64

Override getTypeForExtReturn so that functions returning
an i32 typed value have it sign extended on MIPS64.

Also provide patterns to get rid of unneeded sign extensions
for arithmetic instructions which implicitly sign extend
their results.

Differential Revision: https://reviews.llvm.org/D48374

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338019 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert "[COFF] Use comdat shared constants for MinGW as well"
Martin Storsjo [Thu, 26 Jul 2018 10:48:20 +0000 (10:48 +0000)]
Revert "[COFF] Use comdat shared constants for MinGW as well"

This reverts commit r337951.

While that kind of shared constant generally works fine in a MinGW
setting, it broke some cases of inline assembly that worked before:

$ cat const-asm.c
int MULH(int a, int b) {
    int rt, dummy;
    __asm__ (
        "imull %3"
        :"=d"(rt), "=a"(dummy)
        :"a"(a), "rm"(b)
    );
    return rt;
}
int func(int a) {
    return MULH(a, 1);
}
$ clang -target x86_64-win32-gnu -c const-asm.c -O2
const-asm.c:4:9: error: invalid variant '00000001'
        "imull %3"
        ^
<inline asm>:1:15: note: instantiated into assembly here
        imull __real@00000001(%rip)
                     ^

A similar error is produced for i686 as well. The same test with a
target of x86_64-win32-msvc or i686-win32-msvc works fine.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338018 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[x86/SLH] Extract the logic to trace predicate state through calls to
Chandler Carruth [Thu, 26 Jul 2018 09:42:57 +0000 (09:42 +0000)]
[x86/SLH] Extract the logic to trace predicate state through calls to
a helper function with a nice overview comment. NFC.

This is a preperatory refactoring to implementing another component of
mitigation here that was descibed in the design document but hadn't been
implemented yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338016 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[test] Do dsymutil update in place
Jonas Devlieghere [Thu, 26 Jul 2018 09:23:10 +0000 (09:23 +0000)]
[test] Do dsymutil update in place

Update the dSYM bundle in place when swapping out the accelerator
tables. This should unbreak the windows bot that have been failing with
an access denied.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338014 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAllow users of the GCOV API to extend the FileInfo class to implement custom output...
Marco Castelluccio [Thu, 26 Jul 2018 09:21:56 +0000 (09:21 +0000)]
Allow users of the GCOV API to extend the FileInfo class to implement custom output formats

Summary:
The GCOV API can be used to parse gcda/gcno files, but in order to implement custom output formats, users need to reimplement everything.
If the FileInfo members were protected instead of private, they'd be able to reuse the code.

Reviewers: bogner, davide, scott.smith

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D41802

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338013 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][NFC] Removed tab characters from test files.
Sjoerd Meijer [Thu, 26 Jul 2018 07:59:39 +0000 (07:59 +0000)]
[AArch64][NFC] Removed tab characters from test files.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338011 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64] Armv8.2-A: add the crypto extensions
Sjoerd Meijer [Thu, 26 Jul 2018 07:13:59 +0000 (07:13 +0000)]
[AArch64] Armv8.2-A: add the crypto extensions

This adds MC support for the crypto instructions that were made optional
extensions in Armv8.2-A (AArch64 only).

Differential Revision: https://reviews.llvm.org/D49370

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338010 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[ConstProp] Fix calls-math-finite.ll on FreeBSD
Fangrui Song [Thu, 26 Jul 2018 06:24:11 +0000 (06:24 +0000)]
[ConstProp] Fix calls-math-finite.ll on FreeBSD

FreeBSD's log(3.0) is less precise than glibc and musl.
Let's forgive its rounding error of more than half an ulp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338009 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AsmParser] Fix preserve-comments-crlf.s on FreeBSD
Fangrui Song [Thu, 26 Jul 2018 06:07:03 +0000 (06:07 +0000)]
[AsmParser] Fix preserve-comments-crlf.s on FreeBSD

--strip-trailing-cr is a diffutils option which is also available on
BSD-licensed diff introduced in FreeBSD 11.2, however, it has a bug
comparing files mixing \r and \r\n. Use -b (POSIX) instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338008 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Don't use CombineTo to skip adding new nodes to the DAGCombiner worklist in...
Craig Topper [Thu, 26 Jul 2018 05:40:10 +0000 (05:40 +0000)]
[X86] Don't use CombineTo to skip adding new nodes to the DAGCombiner worklist in combineMul.

I'm not sure if this was trying to avoid optimizing the new nodes further or what. Or maybe to prevent a cycle if something tried to reform the multiply? But I don't think its a reliable way to do that. If the user of the expanded multiply is visited by the DAGCombiner after this conversion happens, the DAGCombiner will check its operands, see that they haven't been visited by the DAGCombiner before and it will then add the first node to the worklist. This process will repeat until all the new nodes are visited.

So this seems like an unreliable prevention at best. So this patch just returns the new nodes like any other combine. If this starts causing problems we can try to add target specific nodes or something to more directly prevent optimizations.

Now that we handle the combine normally, we can combine any negates the mul expansion creates into their users since those will be visited now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338007 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Docs] Update of Xray page
David Carlier [Thu, 26 Jul 2018 04:44:31 +0000 (04:44 +0000)]
[Docs] Update of Xray page

Update of supported oses.

Reviewers: dberris

Reviewed By: dberris

Differential Revision: https://reviews.llvm.org/D49789

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338003 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert r337981: it breaks the debuginfo-tests
Alex Lorenz [Thu, 26 Jul 2018 03:21:40 +0000 (03:21 +0000)]
Revert r337981: it breaks the debuginfo-tests

This commit caused a regression in the debuginfo-tests:

FAIL: debuginfo-tests :: apple-accel.cpp (40748 of 46595)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337997 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Remove some unnecessary explicit calls to DCI.AddToWorkList.
Craig Topper [Thu, 26 Jul 2018 03:20:27 +0000 (03:20 +0000)]
[X86] Remove some unnecessary explicit calls to DCI.AddToWorkList.

These calls were making sure some newly created nodes were added to worklist, but the DAGCombiner has internal support for ensuring it has visited all nodes. Any time it visits a node it ensures the operands have been queued to be visited as well. This means if we only need to return the last new node. The DAGCombiner will take care of adding its inputs thus walking backwards through all the new nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337996 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Support] Introduce createStringError helper function
Victor Leschuk [Thu, 26 Jul 2018 02:21:40 +0000 (02:21 +0000)]
[Support] Introduce createStringError helper function

The function in question is copy-pasted lots of times in DWARF-related classes.
Thus it will make sense to place its implementation into the Support library.

Reviewed by: lhames

Differential Revision: https://reviews.llvm.org/D49824

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337995 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[GlobalISel] Fall back to SDISel for swifterror/swiftself attributes.
Amara Emerson [Thu, 26 Jul 2018 01:25:58 +0000 (01:25 +0000)]
[GlobalISel] Fall back to SDISel for swifterror/swiftself attributes.

We don't currently support these, fall back until we do.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337994 91177308-0d34-0410-b5e6-96231b3b80d8