platform/upstream/llvm.git
6 years ago[llvm-mca][BtVer2] teach how to identify false dependencies on partially written
Andrea Di Biagio [Sun, 15 Jul 2018 11:01:38 +0000 (11:01 +0000)]
[llvm-mca][BtVer2] teach how to identify false dependencies on partially written
registers.

The goal of this patch is to improve the throughput analysis in llvm-mca for the
case where instructions perform partial register writes.

On x86, partial register writes are quite difficult to model, mainly because
different processors tend to implement different register merging schemes in
hardware.

When the code contains partial register writes, the IPC (instructions per
cycles) estimated by llvm-mca tends to diverge quite significantly from the
observed IPC (using perf).

Modern AMD processors (at least, from Bulldozer onwards) don't rename partial
registers. Quoting Agner Fog's microarchitecture.pdf:
" The processor always keeps the different parts of an integer register together.
For example, AL and AH are not treated as independent by the out-of-order
execution mechanism. An instruction that writes to part of a register will
therefore have a false dependence on any previous write to the same register or
any part of it."

This patch is a first important step towards improving the analysis of partial
register updates. It changes the semantic of RegisterFile descriptors in
tablegen, and teaches llvm-mca how to identify false dependences in the presence
of partial register writes (for more details: see the new code comments in
include/Target/TargetSchedule.h - class RegisterFile).

This patch doesn't address the case where a write to a part of a register is
followed by a read from the whole register.  On Intel chips, high8 registers
(AH/BH/CH/DH)) can be stored in separate physical registers. However, a later
(dirty) read of the full register (example: AX/EAX) triggers a merge uOp, which
adds extra latency (and potentially affects the pipe usage).
This is a very interesting article on the subject with a very informative answer
from Peter Cordes:
https://stackoverflow.com/questions/45660139/how-exactly-do-partial-registers-on-haswell-skylake-perform-writing-al-seems-to

In future, the definition of RegisterFile can be extended with extra information
that may be used to identify delays caused by merge opcodes triggered by a dirty
read of a partial write.

Differential Revision: https://reviews.llvm.org/D49196

llvm-svn: 337123

6 years ago[AVR] Document some public functions
Dylan McKay [Sun, 15 Jul 2018 07:24:27 +0000 (07:24 +0000)]
[AVR] Document some public functions

llvm-svn: 337122

6 years ago[TableGen] std::move vectors into TreePatternNode.
Craig Topper [Sun, 15 Jul 2018 06:52:49 +0000 (06:52 +0000)]
[TableGen] std::move vectors into TreePatternNode.

llvm-svn: 337121

6 years ago[TableGen] Remove what seems to be an unnecessary std::map copy.
Craig Topper [Sun, 15 Jul 2018 06:52:48 +0000 (06:52 +0000)]
[TableGen] Remove what seems to be an unnecessary std::map copy.

The comment says the copy was made so it could be destroyed in the following loop, but the original map wasn't used after the loop.

llvm-svn: 337120

6 years ago[X86] Add some optsize patterns for 256-bit X86vzmovl.
Craig Topper [Sun, 15 Jul 2018 06:03:19 +0000 (06:03 +0000)]
[X86] Add some optsize patterns for 256-bit X86vzmovl.

These patterns use VMOVSS/SD. Without optsize we use BLENDI instead.

llvm-svn: 337119

6 years ago[CMake] Use correct variable as header install prefix
Petr Hosek [Sun, 15 Jul 2018 04:09:35 +0000 (04:09 +0000)]
[CMake] Use correct variable as header install prefix

This variable is already set in CMakeLists.txt but it wasn't used
which means that the headers get installed into a wrong location
when the per target runtime directory option is being used.

Differential Revision: https://reviews.llvm.org/D49345

llvm-svn: 337118

6 years ago[CMake] Use libc++ and compiler-rt for sanitizers
Petr Hosek [Sun, 15 Jul 2018 03:11:43 +0000 (03:11 +0000)]
[CMake] Use libc++ and compiler-rt for sanitizers

When building runtimes for Linux as part of Fuchsia toolchain, use
libc++ and compiler-rt for sanitizers.

Differential Revision: https://reviews.llvm.org/D49331

llvm-svn: 337117

6 years ago[CMake] Change the flag to use compiler-rt builtins to boolean
Petr Hosek [Sun, 15 Jul 2018 03:05:20 +0000 (03:05 +0000)]
[CMake] Change the flag to use compiler-rt builtins to boolean

This changes the name and the type to what it was prior to r333037
which matches the name of the flag used in other runtimes: libc++,
libc++abi and libunwind. We don't need the type to be a string since
there's only binary choice between libgcc and compiler-rt unlike in
the case of C++ library where there're multiple options.

Differential Revision: https://reviews.llvm.org/D49325

llvm-svn: 337116

6 years ago[CMake] Pass CMAKE_INSTALL_DO_STRIP to external projects
Petr Hosek [Sun, 15 Jul 2018 02:12:25 +0000 (02:12 +0000)]
[CMake] Pass CMAKE_INSTALL_DO_STRIP to external projects

This is necessary to make install-<target>-stripped work for
external projects such as runtimes.

Differential Revision: https://reviews.llvm.org/D49335

llvm-svn: 337115

6 years ago[TableGen] Add some std::move to the PatternToMatch constructor.
Craig Topper [Sun, 15 Jul 2018 01:10:28 +0000 (01:10 +0000)]
[TableGen] Add some std::move to the PatternToMatch constructor.

The are two vectors passed by value to the constructor. We should be able to move them into the object.

llvm-svn: 337114

6 years ago[llvm-mca] Turn InstructionTables into a Stage.
Matt Davis [Sat, 14 Jul 2018 23:52:50 +0000 (23:52 +0000)]
[llvm-mca] Turn InstructionTables into a Stage.

Summary:
This patch converts the InstructionTables class into a subclass of mca::Stage.  This change allows us to use the Stage's inherited Listeners for event notifications.  This also allows us to create a simple pipeline for viewing the InstructionTables report.

I have been working on a follow on patch that should cleanup addView in InstructionTables.  Right now, addView adds the view to both the Listener list and Views list.  The follow-on patch addresses the fact that we don't really need two lists in this case.  That change is not specific to just InstructionTables, so it will be a separate patch.

Reviewers: andreadb, courbet, RKSimon

Reviewed By: andreadb

Subscribers: tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D49329

llvm-svn: 337113

6 years ago[NFC][InstCombine] foldICmpWithLowBitMaskedVal(): update comments.
Roman Lebedev [Sat, 14 Jul 2018 20:08:52 +0000 (20:08 +0000)]
[NFC][InstCombine] foldICmpWithLowBitMaskedVal(): update comments.

All predicates are handled.
There does not seem to be any other possible folds here.
There are some more folds possible with inverted mask though.

llvm-svn: 337112

6 years ago[InstCombine] Fold x & (-1 >> y) s< x to x s> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:47 +0000 (20:08 +0000)]
[InstCombine] Fold  x & (-1 >> y) s< x  to  x s> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337111

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) s< x to x s> (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:42 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) s< x  to  x s> (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337110

6 years ago[InstCombine] Fold x & (-1 >> y) s>= x to x s<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:37 +0000 (20:08 +0000)]
[InstCombine] Fold  x & (-1 >> y) s>= x  to  x s<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337109

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) s>= x to x s<= (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:31 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) s>= x  to  x s<= (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337108

6 years ago[InstCombine] Fold x s<= x & (-1 >> y) to x s<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:26 +0000 (20:08 +0000)]
[InstCombine] Fold  x s<= x & (-1 >> y)  to  x s<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337107

6 years ago[NFC][InstCombine] Tests for x s<= x & (-1 >> y) to x s<= (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:21 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x s<= x & (-1 >> y)  to  x s<= (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337106

6 years ago[InstCombine] Fold x s> x & (-1 >> y) to x s> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:16 +0000 (20:08 +0000)]
[InstCombine] Fold  x s> x & (-1 >> y)  to  x s> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337105

6 years ago[NFC][InstCombine] Tests for x s> x & (-1 >> y) to x s> (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:09 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x s> x & (-1 >> y)  to  x s> (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

llvm-svn: 337104

6 years agoAdd caching when looking up coroutine_traits
Brian Gesiak [Sat, 14 Jul 2018 18:21:44 +0000 (18:21 +0000)]
Add caching when looking up coroutine_traits

Summary:
Currently clang looks up the coroutine_traits ClassTemplateDecl
everytime it looks up the promise type. This is unnecessary
as coroutine_traits doesn't change between promise type lookups.

This diff caches the coroutine_traits lookup.

Patch by Tanoy Sinha!

Test Plan:
I added log statements in the new lookupCoroutineTraits function
to ensure that LookupQualifiedName was only called once even
when multiple coroutines existed in the source file.

Reviewers: modocache, GorNishanov

Reviewed By: modocache

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D48981

llvm-svn: 337103

6 years ago[InstCombine] Fold x u<= x & C to x u<= C
Roman Lebedev [Sat, 14 Jul 2018 16:44:54 +0000 (16:44 +0000)]
[InstCombine] Fold  x u<= x & C  to  x u<= C

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/Fqp

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337102

6 years ago[NFC][InstCombine] Tests for x u<= x & C to x u<= C fold.
Roman Lebedev [Sat, 14 Jul 2018 16:44:48 +0000 (16:44 +0000)]
[NFC][InstCombine] Tests for  x u<= x & C  to  x u<= C  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/Fqp

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337101

6 years ago[InstCombine] Fold x u> x & C to x u> C
Roman Lebedev [Sat, 14 Jul 2018 16:44:43 +0000 (16:44 +0000)]
[InstCombine] Fold  x u> x & C  to  x u> C

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/JvS

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337100

6 years ago[NFC][InstCombine] Tests for x u> x & C to x u> C fold.
Roman Lebedev [Sat, 14 Jul 2018 16:44:37 +0000 (16:44 +0000)]
[NFC][InstCombine] Tests for  x u> x & C  to  x u> C  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/JvS

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337099

6 years ago[InstCombine] Fold x & (-1 >> y) u< x to x u> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:16 +0000 (12:20 +0000)]
[InstCombine] Fold  x & (-1 >> y) u< x  to  x u> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/ocb

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337098

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) u< x to x u> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:11 +0000 (12:20 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) u< x  to  x u> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/ocb

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337097

6 years ago[InstCombine] Fold x & (-1 >> y) u>= x to x u<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:06 +0000 (12:20 +0000)]
[InstCombine] Fold  x & (-1 >> y) u>= x  to  x u<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/azI

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337096

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) u>= x to x u<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:01 +0000 (12:20 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) u>= x  to  x u<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/azI

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

llvm-svn: 337095

6 years ago[NFC][InstCombine] Add forgotten variable tests for foldICmpWithLowBitMaskedVal()
Roman Lebedev [Sat, 14 Jul 2018 12:19:56 +0000 (12:19 +0000)]
[NFC][InstCombine] Add forgotten variable tests for foldICmpWithLowBitMaskedVal()

llvm-svn: 337094

6 years agoattempt to get test/COFF/driver.test passing on sanitizer-x86_64-linux-fast; cf r337092
Nico Weber [Sat, 14 Jul 2018 11:47:23 +0000 (11:47 +0000)]
attempt to get test/COFF/driver.test passing on sanitizer-x86_64-linux-fast; cf r337092

llvm-svn: 337093

6 years agoAttempt to get test/tools/llvm-lib/help.test passing on sanitizer-x86_64-linux-fast
Nico Weber [Sat, 14 Jul 2018 11:33:33 +0000 (11:33 +0000)]
Attempt to get test/tools/llvm-lib/help.test passing on sanitizer-x86_64-linux-fast

The bot has a /b directory, so /? matches against that and gets expanded to it.

(Thanks to Hans's r187366, which solved the same problem for clang-cl a while
ago and which saved me much head scratching.)

llvm-svn: 337092

6 years ago[clang-tidy] Force exceptions to be enabled in test
Benjamin Kramer [Sat, 14 Jul 2018 10:48:06 +0000 (10:48 +0000)]
[clang-tidy] Force exceptions to be enabled in test

For targets that have them off by default.

llvm-svn: 337091

6 years ago[MachineOutliner] Check the last instruction from the sequence when updating liveness
Francis Visoiu Mistrih [Sat, 14 Jul 2018 09:40:01 +0000 (09:40 +0000)]
[MachineOutliner] Check the last instruction from the sequence when updating liveness

The MachineOutliner was doing an std::for_each from the call (inserted
before the outlined sequence) to the iterator at the end of the
sequence.

std::for_each needs the iterator past the end, so the last instruction
was not taken into account when propagating the liveness information.

This fixes the machine verifier issue in machine-outliner-disubprogram.ll.

Differential Revision: https://reviews.llvm.org/D49295

llvm-svn: 337090

6 years ago[x86/SLH] Fix an issue where we wouldn't harden any loads if we found
Chandler Carruth [Sat, 14 Jul 2018 09:32:37 +0000 (09:32 +0000)]
[x86/SLH] Fix an issue where we wouldn't harden any loads if we found
no conditions.

This is only valid to do if we're hardening calls and rets with LFENCE
which results in an LFENCE guarding the entire entry block for us.

llvm-svn: 337089

6 years ago[X86] Fix a subtle bug in the custom execution domain fixing for blends.
Craig Topper [Sat, 14 Jul 2018 06:30:30 +0000 (06:30 +0000)]
[X86] Fix a subtle bug in the custom execution domain fixing for blends.

The code tried to find the immediate by using getNumOperands() on the MachineInstr, but there might be implicit-defs after the immediate that get counted.

Instead use getNumOperands() from the instruction description which will only count the operands that are defined in the td file.

llvm-svn: 337088

6 years agoMark __equal_to 's operations as constexpr.
Marshall Clow [Sat, 14 Jul 2018 04:15:19 +0000 (04:15 +0000)]
Mark __equal_to 's operations as constexpr.

llvm-svn: 337087

6 years agolld-link: Add /lib to Options.td so that it appears in lld-link's help output.
Nico Weber [Sat, 14 Jul 2018 04:07:51 +0000 (04:07 +0000)]
lld-link: Add /lib to Options.td so that it appears in lld-link's help output.

https://reviews.llvm.org/D49319

llvm-svn: 337086

6 years agoMark one more __wrap_iter operation as constexpr.
Marshall Clow [Sat, 14 Jul 2018 03:06:11 +0000 (03:06 +0000)]
Mark one more __wrap_iter operation as constexpr.

llvm-svn: 337085

6 years agoGive llvm-lib rudimentary help output.
Nico Weber [Sat, 14 Jul 2018 02:29:44 +0000 (02:29 +0000)]
Give llvm-lib rudimentary help output.

https://reviews.llvm.org/D49318

llvm-svn: 337084

6 years ago[X86] Prefer blendi over movss/sd when avx512 is enabled unless optimizing for size.
Craig Topper [Sat, 14 Jul 2018 02:05:08 +0000 (02:05 +0000)]
[X86] Prefer blendi over movss/sd when avx512 is enabled unless optimizing for size.

AVX512 doesn't have an immediate controlled blend instruction. But blend throughput is still better than movss/sd on SKX.

This commit changes AVX512 to use the AVX blend instructions instead of MOVSS/MOVSD. This constrains the register allocation since it won't be able to use XMM16-31, but hopefully the increased throughput and reduced port 5 pressure makes up for that.

llvm-svn: 337083

6 years agoRevert "[ThinLTO] Ensure we always select the same function copy to import"
Teresa Johnson [Sat, 14 Jul 2018 01:50:14 +0000 (01:50 +0000)]
Revert "[ThinLTO] Ensure we always select the same function copy to import"

This reverts commit r337051.

llvm-svn: 337082

6 years agoRevert "[ThinLTO] Ensure we always select the same function copy to import"
Teresa Johnson [Sat, 14 Jul 2018 01:45:49 +0000 (01:45 +0000)]
Revert "[ThinLTO] Ensure we always select the same function copy to import"

This reverts commits r337050 and r337059. Caused failure in
reverse-iteration bot that needs more investigation.

llvm-svn: 337081

6 years agoRevert "[ThinLTO] Add debug output to test"
Teresa Johnson [Sat, 14 Jul 2018 01:34:06 +0000 (01:34 +0000)]
Revert "[ThinLTO] Add debug output to test"

This reverts commit r337076. Not needed any more.

llvm-svn: 337080

6 years agoRevert "AMDGPU: Fix handling of alignment padding in DAG argument lowering"
Evgeniy Stepanov [Sat, 14 Jul 2018 01:20:53 +0000 (01:20 +0000)]
Revert "AMDGPU: Fix handling of alignment padding in DAG argument lowering"

This reverts commit r337021.

WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x1415cd65 in void write_signed<long>(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:95:7
    #1 0x1415c900 in llvm::write_integer(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:121:3
    #2 0x1472357f in llvm::raw_ostream::operator<<(long) /code/llvm-project/llvm/lib/Support/raw_ostream.cpp:117:3
    #3 0x13bb9d4 in llvm::raw_ostream::operator<<(int) /code/llvm-project/llvm/include/llvm/Support/raw_ostream.h:210:18
    #4 0x3c2bc18 in void printField<unsigned int, &(amd_kernel_code_s::amd_kernel_code_version_major)>(llvm::StringRef, amd_kernel_code_s const&, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:78:23
    #5 0x3c250ba in llvm::printAmdKernelCodeField(amd_kernel_code_s const&, int, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:104:5
    #6 0x3c27ca3 in llvm::dumpAmdKernelCode(amd_kernel_code_s const*, llvm::raw_ostream&, char const*) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:113:5
    #7 0x3a46e6c in llvm::AMDGPUTargetAsmStreamer::EmitAMDKernelCodeT(amd_kernel_code_s const&) /code/llvm-project/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp:161:3
    #8 0xd371e4 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:204:26

[...]

Uninitialized value was created by an allocation of 'KernelCode' in the stack frame of function '_ZN4llvm16AMDGPUAsmPrinter21EmitFunctionBodyStartEv'
    #0 0xd36650 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:192

llvm-svn: 337079

6 years ago[x86/SLH] Add an assert to catch if we ever end up trying to harden
Chandler Carruth [Sat, 14 Jul 2018 00:52:09 +0000 (00:52 +0000)]
[x86/SLH] Add an assert to catch if we ever end up trying to harden
post-load a register that isn't valid for use with OR or SHRX.

llvm-svn: 337078

6 years ago[llvm-mca] Remove unused InstRef formal from pre and post execute callbacks. NFC.
Matt Davis [Sat, 14 Jul 2018 00:10:42 +0000 (00:10 +0000)]
[llvm-mca] Remove unused InstRef formal from pre and post execute callbacks. NFC.

llvm-svn: 337077

6 years ago[ThinLTO] Add debug output to test
Teresa Johnson [Sat, 14 Jul 2018 00:08:48 +0000 (00:08 +0000)]
[ThinLTO] Add debug output to test

Add -debug-only=function-import to get more information for debugging
reverse-iteration bot failure from r337050.

llvm-svn: 337076

6 years agoRe-apply "[SCEV] Strengthen StrengthenNoWrapFlags (reapply r334428)."
Tim Shen [Fri, 13 Jul 2018 23:58:46 +0000 (23:58 +0000)]
Re-apply "[SCEV] Strengthen StrengthenNoWrapFlags (reapply r334428)."

llvm-svn: 337075

6 years agoAdd a CHECK line for r337072.
Tim Shen [Fri, 13 Jul 2018 23:48:59 +0000 (23:48 +0000)]
Add a CHECK line for r337072.

llvm-svn: 337074

6 years ago[Hexagon] Avoid introducing calls into coalesced range of HVX vector pairs
Krzysztof Parzyszek [Fri, 13 Jul 2018 23:42:29 +0000 (23:42 +0000)]
[Hexagon] Avoid introducing calls into coalesced range of HVX vector pairs

If an HVX vector register is to be coalesced into a vector pair, make
sure that the vector pair will not have a function call in its live range,
unless it already had one. All HVX vector registers are volatile, so
any vector register live across a function call will have to be spilled.

If a vector needs to be spilled, and it's coalesced into a vector pair
then the whole pair will need to be spilled (even if only a part of it is
live), taking extra stack space.

llvm-svn: 337073

6 years ago[LSR] If no Use is interesting, early return.
Tim Shen [Fri, 13 Jul 2018 23:40:00 +0000 (23:40 +0000)]
[LSR] If no Use is interesting, early return.

Summary:
By looking at the callers of getUse(), we can see that even though
IVUsers may offer uses, but they may not be interesting to
LSR. It's possible that none of them is interesting.

Reviewers: sanjoy

Subscribers: jlebar, hiraditya, bixia, llvm-commits

Differential Revision: https://reviews.llvm.org/D49049

llvm-svn: 337072

6 years agoRollback r337070.
Sterling Augustine [Fri, 13 Jul 2018 23:03:15 +0000 (23:03 +0000)]
Rollback r337070.

Someone simultaneously fixed the breakage it was designed to fix.

llvm-svn: 337071

6 years agoUpdate ClangASTContext for the new DependentVector type.
Sterling Augustine [Fri, 13 Jul 2018 22:54:41 +0000 (22:54 +0000)]
Update ClangASTContext for the new DependentVector type.

https://reviews.llvm.org/D49326

llvm-svn: 337070

6 years ago[Documentation] Add missing description for bugprone-exception-escape in Release...
Eugene Zelenko [Fri, 13 Jul 2018 22:53:05 +0000 (22:53 +0000)]
[Documentation] Add missing description for bugprone-exception-escape in Release Notes.

llvm-svn: 337069

6 years ago[UBSan] Followup for silence_unsigned_overflow flag to handle negate overflows.
Max Moroz [Fri, 13 Jul 2018 22:49:06 +0000 (22:49 +0000)]
[UBSan] Followup for silence_unsigned_overflow flag to handle negate overflows.

Summary:
That flag has been introduced in https://reviews.llvm.org/D48660 for
suppressing UIO error messages in an efficient way. The main motivation is to
be able to use UIO checks in builds used for fuzzing as it might provide an
interesting signal to a fuzzing engine such as libFuzzer.

See https://github.com/google/oss-fuzz/issues/910 for more information.

Reviewers: morehouse, kcc

Reviewed By: morehouse

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

Differential Revision: https://reviews.llvm.org/D49324

llvm-svn: 337068

6 years ago[X86][SLH] Remove PDEP and PEXT from isDataInvariantLoad
Craig Topper [Fri, 13 Jul 2018 22:41:52 +0000 (22:41 +0000)]
[X86][SLH] Remove PDEP and PEXT from isDataInvariantLoad

Ryzen has something like an 18 cycle latency on these based on Agner's data. AMD's own xls is blank. So it seems like there might be something tricky here.

Agner's data for Intel CPUs indicates these are a single uop there.

Probably safest to remove them. We never generate them without an intrinsic so this should be ok.

Differential Revision: https://reviews.llvm.org/D49315

llvm-svn: 337067

6 years ago[X86][SLH] Add VEX and EVEX conversion instructions to isDataInvariantLoad
Craig Topper [Fri, 13 Jul 2018 22:41:50 +0000 (22:41 +0000)]
[X86][SLH] Add VEX and EVEX conversion instructions to isDataInvariantLoad

-Drop the intrinsic versions of conversion instructions. These should be handled when we do vectors. They shouldn't show up in scalar code.
-Add the float<->double conversions which were missing.
-Add the AVX512 and AVX version of the conversion instructions including the unsigned integer conversions unique to AVX512

Differential Revision: https://reviews.llvm.org/D49313

llvm-svn: 337066

6 years ago[X86][SLH] Regroup the instructions in isDataInvariantLoad a little. NFC
Craig Topper [Fri, 13 Jul 2018 22:41:46 +0000 (22:41 +0000)]
[X86][SLH] Regroup the instructions in isDataInvariantLoad a little. NFC

-Move BSF/BSR to the same group as TZCNT/LZCNT/POPCNT.
-Split some of the bit manipulation instructions away from TZCNT/LZCNT/POPCNT. These are things like 'x & (x - 1)' which are composed of a few simple arithmetic operations. These aren't nearly as complicated/surprising as counting bits.
-Move BEXTR/BZHI into their own group. They aren't like a simple arithmethic op or the bit manipulation instructions. They're more like a shift+and.

Differential Revision: https://reviews.llvm.org/D49312

llvm-svn: 337065

6 years ago[lldb-mi] Make symbol-list-lines.test XFAIL on Windows
Alexander Polyakov [Fri, 13 Jul 2018 22:41:16 +0000 (22:41 +0000)]
[lldb-mi] Make symbol-list-lines.test XFAIL on Windows

It's a temporary decision until we reach out what causes
a failure.

llvm-svn: 337064

6 years agoFix -Wswitch after introduction of clang;:Type::DependentVector in r337036
Fangrui Song [Fri, 13 Jul 2018 22:40:40 +0000 (22:40 +0000)]
Fix -Wswitch after introduction of clang;:Type::DependentVector in r337036

llvm-svn: 337063

6 years ago[docs] Update usage directive for llvm-cov report -show-functions
Vedant Kumar [Fri, 13 Jul 2018 22:39:31 +0000 (22:39 +0000)]
[docs] Update usage directive for llvm-cov report -show-functions

llvm-svn: 337062

6 years agoFix comments which mixed up 'before' and 'after', NFC
Vedant Kumar [Fri, 13 Jul 2018 22:39:31 +0000 (22:39 +0000)]
Fix comments which mixed up 'before' and 'after', NFC

llvm-svn: 337061

6 years agoClarify wording of a doxygen comment, NFC
Vedant Kumar [Fri, 13 Jul 2018 22:39:29 +0000 (22:39 +0000)]
Clarify wording of a doxygen comment, NFC

llvm-svn: 337060

6 years ago[ThinLTO] Require x86 target for new test
Teresa Johnson [Fri, 13 Jul 2018 22:36:22 +0000 (22:36 +0000)]
[ThinLTO] Require x86 target for new test

Should fix non-x86 bot failures for new test from r337050.

llvm-svn: 337059

6 years agoMake these tests c++ tests so they can be skipped on systems that don't support those...
Jim Ingham [Fri, 13 Jul 2018 22:31:59 +0000 (22:31 +0000)]
Make these tests c++ tests so they can be skipped on systems that don't support those tests.

llvm-svn: 337058

6 years ago[X86] Use the correct types in some recently added isel patterns.
Craig Topper [Fri, 13 Jul 2018 22:27:53 +0000 (22:27 +0000)]
[X86] Use the correct types in some recently added isel patterns.

These were supposed to be integer types since we are selecting integer instructions.

Found while preparing to remove these patterns for another patch.

llvm-svn: 337057

6 years agoAMDGPU/GlobalISel: Implement select() for 32-bit @llvm.minnun and @llvm.maxnum
Tom Stellard [Fri, 13 Jul 2018 22:16:03 +0000 (22:16 +0000)]
AMDGPU/GlobalISel: Implement select() for 32-bit @llvm.minnun and @llvm.maxnum

Reviewers: arsenm, nhaehnle

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

Differential Revision: https://reviews.llvm.org/D46172

llvm-svn: 337056

6 years ago[X86][FastISel] Support uitofp with avx512.
Craig Topper [Fri, 13 Jul 2018 22:09:30 +0000 (22:09 +0000)]
[X86][FastISel] Support uitofp with avx512.

llvm-svn: 337055

6 years ago[Polly][isl] Add neutrally-named accessors to isl list elements and sizes
Philip Pfaffe [Fri, 13 Jul 2018 22:05:01 +0000 (22:05 +0000)]
[Polly][isl] Add neutrally-named accessors to isl list elements and sizes

Summary: This could simplify the isl iterator implementation a lot.

Reviewers: grosser, Meinersbur, bollu

Reviewed By: grosser

Subscribers: pollydev, llvm-commits

Differential Revision: https://reviews.llvm.org/D49019

llvm-svn: 337054

6 years ago[LTO] Fix linking with an alias defined using another alias.
Eli Friedman [Fri, 13 Jul 2018 21:58:55 +0000 (21:58 +0000)]
[LTO] Fix linking with an alias defined using another alias.

When we're linking an alias which will be defined later, we neeed to
build a GlobalAlias, or else we'll crash later in
IRLinker::linkGlobalValueBody.

clang sometimes constructs aliases like this for C++ destructors.

Differential Revision: https://reviews.llvm.org/D49316

llvm-svn: 337053

6 years ago[X86] Correct comment of TEST elimination in BSF/TZCNT
Fangrui Song [Fri, 13 Jul 2018 21:40:08 +0000 (21:40 +0000)]
[X86] Correct comment of TEST elimination in BSF/TZCNT

llvm-svn: 337052

6 years ago[ThinLTO] Ensure we always select the same function copy to import
Teresa Johnson [Fri, 13 Jul 2018 21:35:58 +0000 (21:35 +0000)]
[ThinLTO] Ensure we always select the same function copy to import

Clang change to reflect the FunctionsToImportTy type change
in the llvm changes for D48670.

llvm-svn: 337051

6 years ago[ThinLTO] Ensure we always select the same function copy to import
Teresa Johnson [Fri, 13 Jul 2018 21:35:51 +0000 (21:35 +0000)]
[ThinLTO] Ensure we always select the same function copy to import

In order to always import the same copy of a linkonce function,
even when encountering it with different thresholds (a higher one then a
lower one), keep track of the summary we decided to import.
This ensures that the backend only gets a single definition to import
for each GUID, so that it doesn't need to choose one.

Move the largest threshold the GUID was considered for import into the
current module out of the ImportMap (which is part of a larger map
maintained across the whole index), and into a new map just maintained
for the current module we are computing imports for. This saves some
memory since we no longer have the thresholds maintained across the
whole index (and throughout the in-process backends when doing a normal
non-distributed ThinLTO build), at the cost of some additional
information being maintained for each invocation of ComputeImportForModule
(the selected summary pointer for each import).

There is an additional map lookup for each callee being considered for
importing, however, this was able to subsume a map lookup in the
Worklist iteration that invokes computeImportForFunction. We also are
able to avoid calling selectCallee if we already failed to import at the
same or higher threshold.

I compared the run time and peak memory for the SPEC2006 471.omnetpp
benchmark (running in-process ThinLTO backends), as well as for a large
internal benchmark with a distributed ThinLTO build (so just looking at
the thin link time/memory). Across a number of runs with and without
this change there was no significant change in the time and memory.

(I tried a few other variations of the change but they also didn't
improve time or peak memory).

Reviewers: davidxl

Subscribers: mehdi_amini, inglorion, llvm-commits

Differential Revision: https://reviews.llvm.org/D48670

llvm-svn: 337050

6 years ago[Hexagon] Fix hvx-length feature name in testcases
Krzysztof Parzyszek [Fri, 13 Jul 2018 21:32:33 +0000 (21:32 +0000)]
[Hexagon] Fix hvx-length feature name in testcases

llvm-svn: 337049

6 years agoMake BuiltinType constructor private, and befriend ASTContext.
Richard Smith [Fri, 13 Jul 2018 21:29:31 +0000 (21:29 +0000)]
Make BuiltinType constructor private, and befriend ASTContext.

This reflects the fact that only ASTContext should ever create an
instance of BuiltinType, and matches what we do for all the other Type
subclasses.

llvm-svn: 337048

6 years agoUse external layout information to layout bit-fields for MS ABI.
Richard Smith [Fri, 13 Jul 2018 21:07:42 +0000 (21:07 +0000)]
Use external layout information to layout bit-fields for MS ABI.

Patch by Aleksandr Urakov!

Differential Revision: https://reviews.llvm.org/D49227

llvm-svn: 337047

6 years agoAMDGPU/GlobalISel: Implement select() for @llvm.amdgcn.exp
Tom Stellard [Fri, 13 Jul 2018 21:05:14 +0000 (21:05 +0000)]
AMDGPU/GlobalISel: Implement select() for @llvm.amdgcn.exp

Reviewers: arsenm, nhaehnle

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

Differential Revision: https://reviews.llvm.org/D45882

llvm-svn: 337046

6 years ago[X86][FastISel] Add EVEX support to sitofp handling.
Craig Topper [Fri, 13 Jul 2018 21:03:43 +0000 (21:03 +0000)]
[X86][FastISel] Add EVEX support to sitofp handling.

llvm-svn: 337045

6 years agoFix for Darwin buildbot failure due to r337037
Vlad Tsyrklevich [Fri, 13 Jul 2018 20:56:48 +0000 (20:56 +0000)]
Fix for Darwin buildbot failure due to r337037

Duplicate __get_unsafe_stack_bottom instead of using an alias for
platforms that don't suppport it like Darwin.

llvm-svn: 337044

6 years ago[X86] Try fixing r336768
Fangrui Song [Fri, 13 Jul 2018 20:54:24 +0000 (20:54 +0000)]
[X86] Try fixing r336768

llvm-svn: 337043

6 years ago[NFC][InstCombine] Tests for 'check for [no] signed truncation' pattern
Roman Lebedev [Fri, 13 Jul 2018 20:33:34 +0000 (20:33 +0000)]
[NFC][InstCombine] Tests for 'check for [no] signed truncation' pattern

[[ https://bugs.llvm.org/show_bug.cgi?id=38149 | PR38149 ]]

As discussed in https://reviews.llvm.org/D49179#1158957 and later,
the IR for 'check for [no] signed truncation' pattern can be improved:
https://rise4fun.com/Alive/gBf
^ that pattern will be produced by Implicit Integer Truncation sanitizer,
https://reviews.llvm.org/D48958 https://bugs.llvm.org/show_bug.cgi?id=21530
in signed case, therefore it is probably a good idea to improve it.

The DAGCombine will reverse this transform, see
https://reviews.llvm.org/D49266

llvm-svn: 337042

6 years agoCodeGen: specify alignment + inbounds for automatic variable initialization
JF Bastien [Fri, 13 Jul 2018 20:33:23 +0000 (20:33 +0000)]
CodeGen: specify alignment + inbounds for automatic variable initialization

Summary: Automatic variable initialization was generating default-aligned stores (which are deprecated) instead of using the known alignment from the alloca. Further, they didn't specify inbounds.

Subscribers: dexonsmith, cfe-commits

Differential Revision: https://reviews.llvm.org/D49209

llvm-svn: 337041

6 years ago[X86] Change the rounding mode used when testing the sqrt_round intrinsics.
Craig Topper [Fri, 13 Jul 2018 20:16:38 +0000 (20:16 +0000)]
[X86] Change the rounding mode used when testing the sqrt_round intrinsics.

Using CUR_DIRECTION is not a realistic scenario. That is equivalent to the intrinsic without rounding.

llvm-svn: 337040

6 years agoRevert "[CMake] Pass Clang defaults to runtimes builds"
Petr Hosek [Fri, 13 Jul 2018 20:01:55 +0000 (20:01 +0000)]
Revert "[CMake] Pass Clang defaults to runtimes builds"

This reverts commit r332923 which is no longer needed since its
use has been reverted in r337033.

llvm-svn: 337039

6 years ago[LowerTypeTests] Limit when icall jumptable entries are emitted
Vlad Tsyrklevich [Fri, 13 Jul 2018 19:57:39 +0000 (19:57 +0000)]
[LowerTypeTests] Limit when icall jumptable entries are emitted

Summary:
Currently LowerTypeTests emits jumptable entries for all live external
and address-taken functions; however, we could limit the number of
functions that we emit entries for significantly.

For Cross-DSO CFI, we continue to emit jumptable entries for all
exported definitions.  In the non-Cross-DSO CFI case, we only need to
emit jumptable entries for live functions that are address-taken in live
functions. This ignores exported functions and functions that are only
address taken in dead functions. This change uses ThinLTO summary data
(now emitted for all modules during ThinLTO builds) to determine
address-taken and liveness info.

The logic for emitting jumptable entries is more conservative in the
regular LTO case because we don't have summary data in the case of
monolithic LTO builds; however, once summaries are emitted for all LTO
builds we can unify the Thin/monolithic LTO logic to only use summaries
to determine the liveness of address taking functions.

This change is a partial fix for PR37474. It reduces the build size for
nacl_helper by ~2-3%, the reduction is due to nacl_helper compiling in
lots of unused code and unused functions that are address taken in dead
functions no longer being being considered live due to emitted jumptable
references. The reduction for chromium is ~0.1-0.2%.

Reviewers: pcc, eugenis, javed.absar

Reviewed By: pcc

Subscribers: aheejin, dexonsmith, dschuff, mehdi_amini, eraman, steven_wu, llvm-commits, kcc

Differential Revision: https://reviews.llvm.org/D47652

llvm-svn: 337038

6 years agoSafeStack: Add builtins to read unsafe stack top/bottom
Vlad Tsyrklevich [Fri, 13 Jul 2018 19:48:35 +0000 (19:48 +0000)]
SafeStack: Add builtins to read unsafe stack top/bottom

Summary:
Introduce built-ins to read the unsafe stack top and bottom. The unsafe
stack top is required to implement garbage collection scanning for
Oilpan. Currently there is already a built-in 'get_unsafe_stack_start'
to read the bottom of the unsafe stack, but I chose to duplicate this
API because 'start' is ambiguous (e.g. Oilpan uses WTF::GetStackStart to
read the safe stack top.)

Reviewers: pcc

Reviewed By: pcc

Subscribers: llvm-commits, kcc

Differential Revision: https://reviews.llvm.org/D49152

llvm-svn: 337037

6 years agoPR15730/PR16986 Allow dependently typed vector_size types.
Erich Keane [Fri, 13 Jul 2018 19:46:04 +0000 (19:46 +0000)]
PR15730/PR16986 Allow dependently typed vector_size types.

As listed in the above PRs, vector_size doesn't allow
dependent types/values. This patch introduces a new
DependentVectorType to handle a VectorType that has a dependent
size or type.

In the future, ALL the vector-types should be able to create one
of these to handle dependent types/sizes as well. For example,
DependentSizedExtVectorType could likely be switched to just use
this instead, though that is left as an exercise for the future.

Differential Revision: https://reviews.llvm.org/D49045

llvm-svn: 337036

6 years agoFix the libcxx set, multiset, vector and bitset formatters to work on references.
Jim Ingham [Fri, 13 Jul 2018 19:28:32 +0000 (19:28 +0000)]
Fix the libcxx set, multiset, vector and bitset formatters to work on references.

The synthetic child providers for these classes had a type expression that matched
pointers & references to the type, but the Front End only worked on the actual object.

I fixed this by adding a way for the Synthetic Child FrontEnd provider to request dereference,
and then had these formatters use that mode.

<rdar://problem/40849836>

Differential Revision: https://reviews.llvm.org/D49279

llvm-svn: 337035

6 years agoAdd the new PDBLocationToDWARFExpression.{cpp,h} to the Xcode project.
Jim Ingham [Fri, 13 Jul 2018 19:24:26 +0000 (19:24 +0000)]
Add the new PDBLocationToDWARFExpression.{cpp,h} to the Xcode project.

llvm-svn: 337034

6 years ago[CMake] Don't use CLANG_DEFAULT_* values
Petr Hosek [Fri, 13 Jul 2018 19:16:30 +0000 (19:16 +0000)]
[CMake] Don't use CLANG_DEFAULT_* values

These are not necessarily correct, just because Clang is configured
to use libc++ or compiler-rt as defaults doesn't mean that the host
compiler uses these as defaults as well. A more correct solution
would be to test the host compiler to check what the default actually
is as attempted in D46857.

Part of PR-38025.

Differential Revision: https://reviews.llvm.org/D49272

llvm-svn: 337033

6 years agoAdd includes for CompletionRequest to every file that uses it
Raphael Isemann [Fri, 13 Jul 2018 18:54:55 +0000 (18:54 +0000)]
Add includes for CompletionRequest to every file that uses it

Summary: Should fix the builds (and prevent future builds from failing when people try to reduce includes).

Reviewers: jingham

Reviewed By: jingham

Subscribers: jingham, lldb-commits

Differential Revision: https://reviews.llvm.org/D49311

llvm-svn: 337032

6 years agoReplaced more boilerplate code with CompletionRequest (NFC)
Raphael Isemann [Fri, 13 Jul 2018 18:28:14 +0000 (18:28 +0000)]
Replaced more boilerplate code with CompletionRequest (NFC)

Summary:
As suggested in D48796, this patch replaces even more internal calls that were using the old
completion API style with a single CompletionRequest. In some cases we also pass an option
vector/index, but as we don't always have this information, it currently is not part of the
CompletionRequest class.

The constructor of the CompletionRequest is now also more sensible. You only pass the
user input, cursor position and your list of matches to the request and the rest will be
inferred (using the same code we used before to calculate this). You also have to pass these
match window parameters to it, even though they are unused right now.

The patch shouldn't change any behavior.

Reviewers: jingham

Reviewed By: jingham

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D48976

llvm-svn: 337031

6 years agoNo longer pass a StringRef to the Python API
Raphael Isemann [Fri, 13 Jul 2018 18:13:46 +0000 (18:13 +0000)]
No longer pass a StringRef to the Python API

Summary:
The refactoring patch for DoExecute missed this case of a variadic function that just silently
accepts a StringRef which it then tries to reinterpret as a C-string.

This should fix the Windows builds.

Reviewers: stella.stamenova

Reviewed By: stella.stamenova

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D49309

llvm-svn: 337030

6 years agoFix TestAttachDenied on macOS Mojave
Frederic Riss [Fri, 13 Jul 2018 17:45:43 +0000 (17:45 +0000)]
Fix TestAttachDenied on macOS Mojave

TestAttachDenied tries to attach to a process that is ptracing itself and
verifies that we error out. Starting with macOS Mojave, processes need
an entitlement to be able to ptrace. This commit adds the entitlement for
the test binary when building on Darwin.

llvm-svn: 337029

6 years agowrap _LIBCPP_HAS_NO_CXX14_CONSTEXPR in defined(...)
Marshall Clow [Fri, 13 Jul 2018 17:31:36 +0000 (17:31 +0000)]
wrap _LIBCPP_HAS_NO_CXX14_CONSTEXPR in defined(...)

llvm-svn: 337028

6 years agoShot in the dark to fix gcc 4.9 / c++11 build
Marshall Clow [Fri, 13 Jul 2018 17:24:59 +0000 (17:24 +0000)]
Shot in the dark to fix gcc 4.9 / c++11 build

llvm-svn: 337027

6 years ago[dwarfdump] Add pretty printer for accelerator table based on Atom.
Jonas Devlieghere [Fri, 13 Jul 2018 17:21:51 +0000 (17:21 +0000)]
[dwarfdump] Add pretty printer for accelerator table based on Atom.

For instance, When dumping .apple_types, the second atom represents the
DW_TAG. In addition to printing the raw value, we now also pretty print
the value if the ATOM tells us how.

llvm-svn: 337026

6 years ago[llvm-mca][BtVer2] Add tests for dependency breaking instructions.
Andrea Di Biagio [Fri, 13 Jul 2018 16:46:51 +0000 (16:46 +0000)]
[llvm-mca][BtVer2] Add tests for dependency breaking instructions.

llvm-svn: 337024

6 years ago[TableGen] Suppress type validation when parsing pattern fragments
Ulrich Weigand [Fri, 13 Jul 2018 16:42:15 +0000 (16:42 +0000)]
[TableGen] Suppress type validation when parsing pattern fragments

Currently, any attempt to define a PatFrag involving any floating-point
only (or vector only) node causes a hard assertion failure in TableGen
if the current target does not have any floating-point (or vector)
types.

This is annoying if you want to provide convenience fragments in common
code (e.g. include/llvm/Target/TargetSelectionDAG.td) that is parsed on
all platforms, including those that miss such types.

But really, there's no reason not accept this when parsing the fragment
-- of course it would be an error for such a target to actually *use*
such a fragment anywhere, but as long as it doesn't, I think TableGen
shouldn't error out.

The immediate cause of the assertion failure is the test inside the
ValidateOnExit destructor. This patch simply disables that check while
infering types during parsing of pattern fragments (only).

Reviewed By: hfinkel, kparzysz

Differential Revision: https://reviews.llvm.org/D48887

llvm-svn: 337023