Converting masked vector loads to regular vector loads for x86 AVX should always be a win.
I raised the legality issue of reading the extra memory bytes on llvm-dev. I did not see any
objections.
1. x86 already does this kind of optimization for multiple scalar loads -> vector load.
2. If other targets have the same flexibility, we could move this transform up to CGP or DAGCombiner.
Differential Revision: http://reviews.llvm.org/D18094
llvm-svn: 263446
Summary:
MIPSR6 introduces a class of branches called compact branches. Unlike the
traditional MIPS branches which have a delay slot, compact branches do not
have a delay slot. The instruction following the compact branch is only
executed if the branch is not taken and must not be a branch.
It works by generating compact branches for MIPS32R6 when the delay slot
filler cannot fill a delay slot. Then, inspecting the generated code for
forbidden slot hazards (a compact branch with an adjacent branch or other
CTI) and inserting nops to clear this hazard.
Patch by Simon Dardis.
Reviewers: vkalintiris, dsanders
Subscribers: MatzeB, dsanders, llvm-commits
Differential Revision: http://reviews.llvm.org/D16353
llvm-svn: 263444
Summary:
The current offloading implementation is using -omptargets and -omp-host-ir-file-path options in the frontend. This causes the user a lot of trouble due to to the conflicts with the -o option. E.g. if the user misspells omptargets he will end up with a file with a weird name.
This patches replaces these two options with -fomptargets and -fomp-host-ir-file-path to avoid these issues, and it is also more consistent with the other options like -fopenmp.
Reviewers: hfinkel, carlo.bertolli, arpith-jacob, kkwli0, ABataev
Subscribers: cfe-commits, caomhin, fraggamuffin
Differential Revision: http://reviews.llvm.org/D18112
llvm-svn: 263442
Summary:
When multiple threads perform an atomic op with the same arguments, they
will usually see different return values.
Reviewers: arsenm, tstellarAMD
Subscribers: arsenm, llvm-commits
Differential Revision: http://reviews.llvm.org/D18101
llvm-svn: 263440
Summary:
Normally, when the remote stub is not ready, we will get ECONNREFUSED during the connect()
attempt. However, due to the way how ADB forwarding works, on android targets the connect() will
always be successful, but the connection will be immediately dropped if ADB could not connect on
the remote side. This commit tries to detect this situation, and report it as "connection
refused" so that the upper test layers attempt the connection again.
Reviewers: tfiala, tberghammer
Subscribers: tberghammer, danalbert, srhines, lldb-commits
Differential Revision: http://reviews.llvm.org/D18146
llvm-svn: 263439
Also introduce -stdlib=platform to override the configured value
and use it to make the tests always pass.
Differential Revision: http://reviews.llvm.org/D17286
llvm-svn: 263434
Build-id support is being added to lld and by default it may produce a
64-bit build-id.
Prior to this change lldb would reject such a build-id. However, it then
falls back to a 4-byte crc32, which is a poorer quality identifier.
Differential Revision: http://reviews.llvm.org/D18096
llvm-svn: 263432
On the z13, it turns out to be more efficient to access a full
floating-point register than just the upper half (as done e.g.
by the LE and LER instructions).
Current code already takes this into account when loading from
memory by using the LDE instruction in place of LE. However,
we still generate LER, which shows the same performance issues
as LE in certain circumstances.
This patch changes the back-end to emit LDR instead of LER to
implement FP32 register-to-register copies on z13.
llvm-svn: 263431
ASan also relies on names on allocas and will emit unhelpful output if
they're not present. Just force-enable value names for now. Should
unbreak release builds of asan.
llvm-svn: 263429
Summary:
Fix assertion failure: "Name is not a simple identifier".
`Decl::GetName` assumes the name should be an identifier. When the check
processes the function calling statement with speciail key name like
'it.operator->()', it will trigger the assert in `GetName`.
Rather than using `Decl::GetName`, we use `getNameAsString` which works
with special key names in C++.
Reviewers: bkramer
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18141
llvm-svn: 263426
Summary:
With the addition of checks to ensure that operands have a strict ordering
it has become tricky to manage the order in the way I originally intended.
This patch linearizes the ordering which simplifies the implementation but
requires an order that is arbitrary in places. Here are some examples:
* uimm4 < uimm5 < uimm6
* simm4 < uimm4 < simm5 < uimm5
* uimm5 < uimm5_plus1 (1..32) < uimm5_plus32 (32..63) < uimm6
The term 'superset' starts to break down here since the *_plus* classes
are not true supersets of uimm5 (but they are still subsets of uimm6).
* uimm5 < uimm5_64, and uimm5 < vsplat_uimm5
This is entirely arbitrary. We need an ordering and what we pick is
unimportant since only one is possible for a given mnemonic.
Reviewers: vkalintiris
Subscribers: llvm-commits, dsanders
Differential Revision: http://reviews.llvm.org/D17723
llvm-svn: 263423
This enables "--rtlib compiler-rt" option under MSVC environment.
Patch by Roman Shirokiy.
Differential Revision: http://reviews.llvm.org/D17453
llvm-svn: 263422
s_bitset0_b64, s_bitset1_b64 has 32-bit src0, not 64-bit.
s_rfe_b64 has just one destination operand and no source.
Uncomment S_BITCMP* and S_SETVSKIP, adjust SOPC_* classes for that.
Add s_memrealtime test and change comments in smem.s to follow common style.
Change test for s_memtime to use non-zero register to make it really test encoding.
Add tests for s_buffer_load*.
Add tests for SOPC instructions (same for SI and VI)
Differential Revision: http://reviews.llvm.org/D18040
llvm-svn: 263420
It's failing to build on VS2015 with:
C:\b\build\slave\ClangToTWin\build\src\third_party\llvm\lib\Target\WebAssembly\WebAssemblyRegStackify.cpp(520):
error C2668: 'llvm::make_reverse_iterator': ambiguous call to overloaded function
C:\b\build\slave\ClangToTWin\build\src\third_party\llvm\include\llvm/ADT/STLExtras.h(217):
note: could be 'std::reverse_iterator<llvm::MachineBasicBlock::iterator>
llvm::make_reverse_iterator<llvm::MachineInstrBundleIterator<llvm::MachineInstr>>(IteratorTy)'
with
[
IteratorTy=llvm::MachineInstrBundleIterator<llvm::MachineInstr>
]
C:\b\depot_tools\win_toolchain\vs_files\391bbf1220d3edcd3cc3fccdb56224181e3b13a7\win_sdk\bin\..\..\VC\include\xutility(1217):
note: or 'std::reverse_iterator<llvm::MachineBasicBlock::iterator>
std::make_reverse_iterator<llvm::MachineInstrBundleIterator<llvm::MachineInstr>>(_RanIt)' [found using argument-dependent lookup]
with
[
_RanIt=llvm::MachineInstrBundleIterator<llvm::MachineInstr>
]
I don't have VS2015 locally at the moment, but hopefully this will help.
llvm-svn: 263418
-warn-common
Warn when a common symbol is combined with another common symbol
or with a symbol definition. Unix linkers allow this somewhat
sloppy practice, but linkers on some other operating systems do
not. This option allows you to find potential problems from
combining global symbols.
Differential revision: http://reviews.llvm.org/D17998
llvm-svn: 263413
trying to track origins in the memory sanitizer since the backend
instrumentation pass currently takes names from the Instruction.
Fixes all of the origin tracking tests in compiler-rt after the
-discard-value-name option was added.
llvm-svn: 263412
The motivating example is this
for (j = n; j > 1; j = i) {
i = j / 2;
}
The signed division is safely to be changed to an unsigned division (j is known
to be larger than 1 from the loop guard) and later turned into a single shift
without considering the sign bit.
llvm-svn: 263406
Summary: This comes from work to make attribute manipulable via the C API.
Reviewers: gottesmm, hfinkel, baldrick, echristo, tejohnson
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D18128
llvm-svn: 263404
Summary:
There is no definition about MinLatency any more.
Reviewers: mcrosier, spatel, hfinkel
Differential Revision: http://reviews.llvm.org/D18079
llvm-svn: 263403
This reverts commit r263322 and reapplies r263296. The original
r263258 was reapplied in LLVM after being reverted in r263321 due to
issues with Release testing in Clang.
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 263399
Summary:
This flag is enabled by default in the driver when NDEBUG is set. It
is forwarded on the LLVMContext to discard all value names (but
GlobalValue) for performance purpose.
This an improved version of D18024
Reviewers: echristo, chandlerc
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D18127
From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 263394
Tom Stellard